./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive.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 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 12:01:42,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 12:01:42,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 12:01:42,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 12:01:42,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 12:01:42,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 12:01:42,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 12:01:42,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 12:01:42,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 12:01:42,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 12:01:42,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 12:01:42,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 12:01:42,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 12:01:42,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 12:01:42,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 12:01:42,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 12:01:42,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 12:01:42,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 12:01:42,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 12:01:42,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 12:01:42,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 12:01:42,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 12:01:42,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 12:01:42,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 12:01:42,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 12:01:42,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 12:01:42,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 12:01:42,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 12:01:42,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 12:01:42,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 12:01:42,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 12:01:42,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 12:01:42,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 12:01:42,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 12:01:42,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 12:01:42,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 12:01:42,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 12:01:42,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 12:01:42,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 12:01:42,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 12:01:42,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 12:01:42,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 12:01:42,707 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 12:01:42,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 12:01:42,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 12:01:42,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 12:01:42,709 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 12:01:42,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 12:01:42,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 12:01:42,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 12:01:42,711 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 12:01:42,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 12:01:42,712 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 12:01:42,712 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 12:01:42,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 12:01:42,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 12:01:42,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 12:01:42,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 12:01:42,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 12:01:42,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 12:01:42,713 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 12:01:42,713 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 12:01:42,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 12:01:42,714 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 12:01:42,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 12:01:42,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 12:01:42,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 12:01:42,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 12:01:42,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 12:01:42,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 12:01:42,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 12:01:42,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 12:01:42,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 12:01:42,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 12:01:42,716 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 12:01:42,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 12:01:42,716 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 12:01:42,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 12:01:42,717 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 12:01:42,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 12:01:43,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 12:01:43,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 12:01:43,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 12:01:43,047 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 12:01:43,048 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 12:01:43,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2023-08-30 12:01:44,258 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 12:01:44,515 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 12:01:44,516 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2023-08-30 12:01:44,523 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/557af33af/644327d2df9245b2a6c49e6434113a64/FLAG9c4fd9f8d [2023-08-30 12:01:44,550 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/557af33af/644327d2df9245b2a6c49e6434113a64 [2023-08-30 12:01:44,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 12:01:44,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 12:01:44,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 12:01:44,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 12:01:44,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 12:01:44,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d21a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44, skipping insertion in model container [2023-08-30 12:01:44,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 12:01:44,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 12:01:44,777 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-send-receive.wvr.c[3107,3120] [2023-08-30 12:01:44,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 12:01:44,797 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 12:01:44,831 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-send-receive.wvr.c[3107,3120] [2023-08-30 12:01:44,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 12:01:44,852 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 12:01:44,852 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 12:01:44,858 INFO L208 MainTranslator]: Completed translation [2023-08-30 12:01:44,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44 WrapperNode [2023-08-30 12:01:44,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 12:01:44,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 12:01:44,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 12:01:44,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 12:01:44,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,899 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 174 [2023-08-30 12:01:44,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 12:01:44,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 12:01:44,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 12:01:44,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 12:01:44,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,935 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 12:01:44,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 12:01:44,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 12:01:44,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 12:01:44,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (1/1) ... [2023-08-30 12:01:44,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 12:01:44,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:44,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 12:01:44,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 12:01:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 12:01:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 12:01:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 12:01:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 12:01:45,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 12:01:45,021 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 12:01:45,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 12:01:45,021 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 12:01:45,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 12:01:45,021 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 12:01:45,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 12:01:45,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 12:01:45,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 12:01:45,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 12:01:45,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 12:01:45,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 12:01:45,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 12:01:45,024 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 12:01:45,124 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 12:01:45,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 12:01:45,379 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 12:01:45,548 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 12:01:45,548 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 12:01:45,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:01:45 BoogieIcfgContainer [2023-08-30 12:01:45,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 12:01:45,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 12:01:45,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 12:01:45,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 12:01:45,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:01:44" (1/3) ... [2023-08-30 12:01:45,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ab9553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:01:45, skipping insertion in model container [2023-08-30 12:01:45,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:01:44" (2/3) ... [2023-08-30 12:01:45,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ab9553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:01:45, skipping insertion in model container [2023-08-30 12:01:45,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:01:45" (3/3) ... [2023-08-30 12:01:45,558 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2023-08-30 12:01:45,569 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 12:01:45,577 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 12:01:45,577 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 12:01:45,578 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 12:01:45,657 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 12:01:45,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 146 transitions, 316 flow [2023-08-30 12:01:45,777 INFO L130 PetriNetUnfolder]: 10/143 cut-off events. [2023-08-30 12:01:45,777 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 12:01:45,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 143 events. 10/143 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-08-30 12:01:45,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 146 transitions, 316 flow [2023-08-30 12:01:45,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 128 transitions, 268 flow [2023-08-30 12:01:45,793 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 12:01:45,803 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 128 transitions, 268 flow [2023-08-30 12:01:45,805 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 128 transitions, 268 flow [2023-08-30 12:01:45,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 128 transitions, 268 flow [2023-08-30 12:01:45,842 INFO L130 PetriNetUnfolder]: 10/128 cut-off events. [2023-08-30 12:01:45,842 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 12:01:45,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 128 events. 10/128 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-08-30 12:01:45,845 INFO L119 LiptonReduction]: Number of co-enabled transitions 1764 [2023-08-30 12:01:51,243 INFO L134 LiptonReduction]: Checked pairs total: 2655 [2023-08-30 12:01:51,244 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-30 12:01:51,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 12:01:51,259 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;@e9eea66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 12:01:51,259 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-30 12:01:51,261 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 12:01:51,261 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 12:01:51,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:51,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 12:01:51,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:01:51,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash 20429, now seen corresponding path program 1 times [2023-08-30 12:01:51,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:51,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742266855] [2023-08-30 12:01:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:51,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:51,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:51,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742266855] [2023-08-30 12:01:51,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742266855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:51,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:01:51,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 12:01:51,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639836155] [2023-08-30 12:01:51,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:51,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:01:51,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:01:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 12:01:51,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 273 [2023-08-30 12:01:51,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:51,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:51,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 273 [2023-08-30 12:01:51,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:51,869 INFO L130 PetriNetUnfolder]: 845/1357 cut-off events. [2023-08-30 12:01:51,869 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2023-08-30 12:01:51,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2875 conditions, 1357 events. 845/1357 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 7731 event pairs, 806 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 1300. Up to 661 conditions per place. [2023-08-30 12:01:51,880 INFO L137 encePairwiseOnDemand]: 266/273 looper letters, 43 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-30 12:01:51,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 210 flow [2023-08-30 12:01:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:01:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:01:51,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-08-30 12:01:51,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006105006105006 [2023-08-30 12:01:51,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-08-30 12:01:51,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-08-30 12:01:51,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:51,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-08-30 12:01:51,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:51,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:51,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:51,907 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 72 flow. Second operand 3 states and 410 transitions. [2023-08-30 12:01:51,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 210 flow [2023-08-30 12:01:51,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 48 transitions, 198 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 12:01:51,914 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 74 flow [2023-08-30 12:01:51,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-30 12:01:51,918 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-08-30 12:01:51,919 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 74 flow [2023-08-30 12:01:51,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:51,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:51,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 12:01:51,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 12:01:51,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:01:51,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash 634105, now seen corresponding path program 1 times [2023-08-30 12:01:51,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:51,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277032343] [2023-08-30 12:01:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:51,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:51,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:51,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277032343] [2023-08-30 12:01:51,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277032343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:51,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073685300] [2023-08-30 12:01:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:51,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:51,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:51,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:52,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 12:01:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:52,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 12:01:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:52,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:01:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:52,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073685300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:01:52,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:01:52,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 12:01:52,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828375224] [2023-08-30 12:01:52,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:01:52,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 12:01:52,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 12:01:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 12:01:52,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 273 [2023-08-30 12:01:52,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:52,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:52,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 273 [2023-08-30 12:01:52,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:52,656 INFO L130 PetriNetUnfolder]: 2114/3391 cut-off events. [2023-08-30 12:01:52,656 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 12:01:52,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7123 conditions, 3391 events. 2114/3391 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 22224 event pairs, 2015 based on Foata normal form. 0/2025 useless extension candidates. Maximal degree in co-relation 5695. Up to 660 conditions per place. [2023-08-30 12:01:52,676 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 102 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2023-08-30 12:01:52,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 114 transitions, 504 flow [2023-08-30 12:01:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 12:01:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 12:01:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 947 transitions. [2023-08-30 12:01:52,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4955520669806384 [2023-08-30 12:01:52,681 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 947 transitions. [2023-08-30 12:01:52,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 947 transitions. [2023-08-30 12:01:52,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:52,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 947 transitions. [2023-08-30 12:01:52,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:52,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:52,689 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:52,689 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 74 flow. Second operand 7 states and 947 transitions. [2023-08-30 12:01:52,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 114 transitions, 504 flow [2023-08-30 12:01:52,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 114 transitions, 502 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:01:52,692 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 131 flow [2023-08-30 12:01:52,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=131, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-30 12:01:52,692 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-30 12:01:52,693 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 131 flow [2023-08-30 12:01:52,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:52,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:52,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-30 12:01:52,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 12:01:52,900 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 12:01:52,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:01:52,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:52,901 INFO L85 PathProgramCache]: Analyzing trace with hash 19658062, now seen corresponding path program 1 times [2023-08-30 12:01:52,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:52,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107042674] [2023-08-30 12:01:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:52,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:53,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:53,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107042674] [2023-08-30 12:01:53,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107042674] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:53,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357358014] [2023-08-30 12:01:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:53,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:53,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:53,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:53,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 12:01:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:53,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 12:01:53,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:53,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:01:53,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357358014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:53,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:01:53,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 12:01:53,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436107807] [2023-08-30 12:01:53,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:53,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 12:01:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 12:01:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 12:01:53,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 273 [2023-08-30 12:01:53,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:53,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:53,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 273 [2023-08-30 12:01:53,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:53,548 INFO L130 PetriNetUnfolder]: 2111/3387 cut-off events. [2023-08-30 12:01:53,549 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 12:01:53,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7125 conditions, 3387 events. 2111/3387 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 22515 event pairs, 2015 based on Foata normal form. 2/2028 useless extension candidates. Maximal degree in co-relation 4265. Up to 1973 conditions per place. [2023-08-30 12:01:53,580 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 64 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-30 12:01:53,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 70 transitions, 330 flow [2023-08-30 12:01:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 12:01:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 12:01:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 662 transitions. [2023-08-30 12:01:53,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484981684981685 [2023-08-30 12:01:53,583 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 662 transitions. [2023-08-30 12:01:53,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 662 transitions. [2023-08-30 12:01:53,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:53,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 662 transitions. [2023-08-30 12:01:53,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:53,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:53,589 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:53,589 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 131 flow. Second operand 5 states and 662 transitions. [2023-08-30 12:01:53,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 70 transitions, 330 flow [2023-08-30 12:01:53,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 70 transitions, 322 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 12:01:53,594 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 102 flow [2023-08-30 12:01:53,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-30 12:01:53,597 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-30 12:01:53,598 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 102 flow [2023-08-30 12:01:53,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:53,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:53,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 12:01:53,610 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 12:01:53,804 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 12:01:53,806 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:01:53,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash 609342769, now seen corresponding path program 1 times [2023-08-30 12:01:53,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:53,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125596303] [2023-08-30 12:01:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:53,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:53,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125596303] [2023-08-30 12:01:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125596303] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:53,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:01:53,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 12:01:53,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997103808] [2023-08-30 12:01:53,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:53,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:01:53,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:53,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:01:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 12:01:53,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-30 12:01:53,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:53,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:53,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-30 12:01:53,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:54,369 INFO L130 PetriNetUnfolder]: 2656/4092 cut-off events. [2023-08-30 12:01:54,369 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2023-08-30 12:01:54,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8370 conditions, 4092 events. 2656/4092 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 24616 event pairs, 895 based on Foata normal form. 0/2287 useless extension candidates. Maximal degree in co-relation 6677. Up to 2921 conditions per place. [2023-08-30 12:01:54,390 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 35 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-30 12:01:54,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 203 flow [2023-08-30 12:01:54,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:01:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:01:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-08-30 12:01:54,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713064713064713 [2023-08-30 12:01:54,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-08-30 12:01:54,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-08-30 12:01:54,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:54,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-08-30 12:01:54,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:54,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:54,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:54,396 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 102 flow. Second operand 3 states and 386 transitions. [2023-08-30 12:01:54,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 203 flow [2023-08-30 12:01:54,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 12:01:54,398 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 115 flow [2023-08-30 12:01:54,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-30 12:01:54,399 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-30 12:01:54,399 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 115 flow [2023-08-30 12:01:54,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:54,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:54,400 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 12:01:54,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 12:01:54,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:01:54,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1711553229, now seen corresponding path program 2 times [2023-08-30 12:01:54,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:54,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37229556] [2023-08-30 12:01:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:54,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:54,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37229556] [2023-08-30 12:01:54,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37229556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:54,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856104399] [2023-08-30 12:01:54,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:01:54,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:54,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:54,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:54,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 12:01:54,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 12:01:54,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:01:54,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 12:01:54,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 12:01:54,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:01:54,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856104399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:54,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:01:54,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 12:01:54,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185118941] [2023-08-30 12:01:54,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:54,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:01:54,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:54,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:01:54,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 12:01:54,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 273 [2023-08-30 12:01:54,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:54,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:54,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 273 [2023-08-30 12:01:54,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:55,010 INFO L130 PetriNetUnfolder]: 2656/4041 cut-off events. [2023-08-30 12:01:55,010 INFO L131 PetriNetUnfolder]: For 413/413 co-relation queries the response was YES. [2023-08-30 12:01:55,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9634 conditions, 4041 events. 2656/4041 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 24067 event pairs, 1855 based on Foata normal form. 1/2717 useless extension candidates. Maximal degree in co-relation 7693. Up to 3886 conditions per place. [2023-08-30 12:01:55,035 INFO L137 encePairwiseOnDemand]: 271/273 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 12:01:55,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 30 transitions, 159 flow [2023-08-30 12:01:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:01:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:01:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-30 12:01:55,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46764346764346765 [2023-08-30 12:01:55,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-30 12:01:55,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-30 12:01:55,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:55,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-30 12:01:55,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:55,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:55,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:55,042 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 115 flow. Second operand 3 states and 383 transitions. [2023-08-30 12:01:55,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 30 transitions, 159 flow [2023-08-30 12:01:55,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 147 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 12:01:55,045 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 95 flow [2023-08-30 12:01:55,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=95, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-08-30 12:01:55,046 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2023-08-30 12:01:55,046 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 95 flow [2023-08-30 12:01:55,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:55,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:55,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:55,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 12:01:55,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:55,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:01:55,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:55,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1467362211, now seen corresponding path program 1 times [2023-08-30 12:01:55,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:55,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154429927] [2023-08-30 12:01:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:55,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:55,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:55,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154429927] [2023-08-30 12:01:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154429927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:55,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 12:01:55,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 12:01:55,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751291733] [2023-08-30 12:01:55,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:55,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 12:01:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:55,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 12:01:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 12:01:55,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-08-30 12:01:55,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:55,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:55,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-08-30 12:01:55,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:55,804 INFO L130 PetriNetUnfolder]: 2184/3347 cut-off events. [2023-08-30 12:01:55,805 INFO L131 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2023-08-30 12:01:55,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 3347 events. 2184/3347 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 19315 event pairs, 1543 based on Foata normal form. 16/2306 useless extension candidates. Maximal degree in co-relation 7874. Up to 3110 conditions per place. [2023-08-30 12:01:55,818 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 25 selfloop transitions, 2 changer transitions 13/43 dead transitions. [2023-08-30 12:01:55,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 207 flow [2023-08-30 12:01:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:01:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:01:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2023-08-30 12:01:55,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606227106227106 [2023-08-30 12:01:55,820 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2023-08-30 12:01:55,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2023-08-30 12:01:55,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:55,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2023-08-30 12:01:55,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:55,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:55,824 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:55,824 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 95 flow. Second operand 4 states and 503 transitions. [2023-08-30 12:01:55,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 207 flow [2023-08-30 12:01:55,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:01:55,826 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 108 flow [2023-08-30 12:01:55,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-30 12:01:55,827 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-30 12:01:55,827 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 108 flow [2023-08-30 12:01:55,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:55,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:55,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:55,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 12:01:55,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:01:55,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash -220976649, now seen corresponding path program 1 times [2023-08-30 12:01:55,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:55,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879937838] [2023-08-30 12:01:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:55,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:55,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879937838] [2023-08-30 12:01:55,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879937838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:55,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607588892] [2023-08-30 12:01:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:55,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:55,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:55,902 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:55,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 12:01:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 12:01:55,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 12:01:56,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:01:56,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607588892] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:01:56,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:01:56,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 12:01:56,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934148102] [2023-08-30 12:01:56,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:01:56,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 12:01:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 12:01:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 12:01:56,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 273 [2023-08-30 12:01:56,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:56,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:56,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 273 [2023-08-30 12:01:56,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:56,158 INFO L130 PetriNetUnfolder]: 973/1538 cut-off events. [2023-08-30 12:01:56,158 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-08-30 12:01:56,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3723 conditions, 1538 events. 973/1538 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7870 event pairs, 644 based on Foata normal form. 184/1494 useless extension candidates. Maximal degree in co-relation 3710. Up to 1462 conditions per place. [2023-08-30 12:01:56,165 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 20 selfloop transitions, 1 changer transitions 3/27 dead transitions. [2023-08-30 12:01:56,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 27 transitions, 144 flow [2023-08-30 12:01:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 12:01:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 12:01:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-30 12:01:56,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46642246642246643 [2023-08-30 12:01:56,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-30 12:01:56,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-30 12:01:56,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:01:56,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-30 12:01:56,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:56,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:56,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:56,170 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 108 flow. Second operand 3 states and 382 transitions. [2023-08-30 12:01:56,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 27 transitions, 144 flow [2023-08-30 12:01:56,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 27 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 12:01:56,172 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 83 flow [2023-08-30 12:01:56,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2023-08-30 12:01:56,173 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-08-30 12:01:56,173 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 83 flow [2023-08-30 12:01:56,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:56,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:01:56,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:01:56,186 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 12:01:56,379 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 12:01:56,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:01:56,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:01:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1905150117, now seen corresponding path program 1 times [2023-08-30 12:01:56,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:01:56,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864164261] [2023-08-30 12:01:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:56,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:01:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:56,800 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 12:01:56,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:01:56,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864164261] [2023-08-30 12:01:56,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864164261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:01:56,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983450828] [2023-08-30 12:01:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:01:56,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:01:56,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:01:56,803 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:01:56,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 12:01:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:01:56,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 12:01:56,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:01:56,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:01:57,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:01:57,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:01:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:57,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:01:57,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:57,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-30 12:01:57,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:57,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 140 [2023-08-30 12:01:57,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:57,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 116 [2023-08-30 12:01:57,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:01:57,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 79 [2023-08-30 12:01:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:01:58,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983450828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:01:58,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:01:58,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2023-08-30 12:01:58,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37729798] [2023-08-30 12:01:58,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:01:58,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 12:01:58,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:01:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 12:01:58,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=227, Unknown=1, NotChecked=0, Total=306 [2023-08-30 12:01:58,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 273 [2023-08-30 12:01:58,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 83 flow. Second operand has 18 states, 18 states have (on average 71.66666666666667) internal successors, (1290), 18 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:01:58,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:01:58,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 273 [2023-08-30 12:01:58,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:00,060 INFO L130 PetriNetUnfolder]: 2024/3196 cut-off events. [2023-08-30 12:02:00,060 INFO L131 PetriNetUnfolder]: For 259/259 co-relation queries the response was YES. [2023-08-30 12:02:00,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7779 conditions, 3196 events. 2024/3196 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17221 event pairs, 280 based on Foata normal form. 12/2843 useless extension candidates. Maximal degree in co-relation 7767. Up to 1251 conditions per place. [2023-08-30 12:02:00,075 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 119 selfloop transitions, 66 changer transitions 3/188 dead transitions. [2023-08-30 12:02:00,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 188 transitions, 912 flow [2023-08-30 12:02:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 12:02:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 12:02:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1943 transitions. [2023-08-30 12:02:00,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2846886446886447 [2023-08-30 12:02:00,083 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1943 transitions. [2023-08-30 12:02:00,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1943 transitions. [2023-08-30 12:02:00,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:00,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1943 transitions. [2023-08-30 12:02:00,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 77.72) internal successors, (1943), 25 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:00,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 273.0) internal successors, (7098), 26 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:00,100 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 273.0) internal successors, (7098), 26 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:00,100 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 83 flow. Second operand 25 states and 1943 transitions. [2023-08-30 12:02:00,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 188 transitions, 912 flow [2023-08-30 12:02:00,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 188 transitions, 911 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 12:02:00,104 INFO L231 Difference]: Finished difference. Result has 71 places, 94 transitions, 600 flow [2023-08-30 12:02:00,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=600, PETRI_PLACES=71, PETRI_TRANSITIONS=94} [2023-08-30 12:02:00,105 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2023-08-30 12:02:00,105 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 94 transitions, 600 flow [2023-08-30 12:02:00,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.66666666666667) internal successors, (1290), 18 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:00,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:00,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:00,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:00,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:00,313 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:00,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:00,314 INFO L85 PathProgramCache]: Analyzing trace with hash -97608240, now seen corresponding path program 1 times [2023-08-30 12:02:00,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:00,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398906362] [2023-08-30 12:02:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:00,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:00,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398906362] [2023-08-30 12:02:00,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398906362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:00,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375447817] [2023-08-30 12:02:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:00,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:00,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:00,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:00,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 12:02:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:01,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 12:02:01,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:01,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:02:01,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:02:01,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:02:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:02:01,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:02:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:01,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:02,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:02,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-08-30 12:02:02,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:02,030 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 484 treesize of output 460 [2023-08-30 12:02:02,059 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 152 treesize of output 128 [2023-08-30 12:02:02,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:02,079 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 126 treesize of output 122 [2023-08-30 12:02:02,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:02,097 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 125 treesize of output 109 [2023-08-30 12:02:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:02,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375447817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:02:02,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:02:02,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-30 12:02:02,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595553991] [2023-08-30 12:02:02,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:02:02,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 12:02:02,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:02,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 12:02:02,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=450, Unknown=3, NotChecked=0, Total=552 [2023-08-30 12:02:03,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-08-30 12:02:03,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 600 flow. Second operand has 24 states, 24 states have (on average 68.375) internal successors, (1641), 24 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:03,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:03,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-08-30 12:02:03,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:05,895 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 12:02:07,687 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_307 (Array Int Int))) (< (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_307) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)))) (and (or (< 2147483646 c_~back~0) (= (mod c_~v_assert~0 256) 0) (<= c_~n~0 c_~back~0) .cse0 (< c_~back~0 0) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1))) (or .cse0 (= (mod |c_thread1Thread1of1ForFork2_~cond~0#1| 256) 0)))) is different from false [2023-08-30 12:02:08,798 INFO L130 PetriNetUnfolder]: 2549/4094 cut-off events. [2023-08-30 12:02:08,798 INFO L131 PetriNetUnfolder]: For 17876/17876 co-relation queries the response was YES. [2023-08-30 12:02:08,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17431 conditions, 4094 events. 2549/4094 cut-off events. For 17876/17876 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23645 event pairs, 570 based on Foata normal form. 210/4304 useless extension candidates. Maximal degree in co-relation 17404. Up to 1965 conditions per place. [2023-08-30 12:02:08,826 INFO L137 encePairwiseOnDemand]: 256/273 looper letters, 163 selfloop transitions, 125 changer transitions 5/293 dead transitions. [2023-08-30 12:02:08,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 293 transitions, 2413 flow [2023-08-30 12:02:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 12:02:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 12:02:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2649 transitions. [2023-08-30 12:02:08,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2695360195360195 [2023-08-30 12:02:08,836 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2649 transitions. [2023-08-30 12:02:08,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2649 transitions. [2023-08-30 12:02:08,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:08,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2649 transitions. [2023-08-30 12:02:08,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 73.58333333333333) internal successors, (2649), 36 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:08,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 273.0) internal successors, (10101), 37 states have internal predecessors, (10101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:08,858 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 273.0) internal successors, (10101), 37 states have internal predecessors, (10101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:08,858 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 600 flow. Second operand 36 states and 2649 transitions. [2023-08-30 12:02:08,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 293 transitions, 2413 flow [2023-08-30 12:02:08,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 293 transitions, 2321 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-08-30 12:02:08,898 INFO L231 Difference]: Finished difference. Result has 121 places, 168 transitions, 1441 flow [2023-08-30 12:02:08,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1441, PETRI_PLACES=121, PETRI_TRANSITIONS=168} [2023-08-30 12:02:08,899 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 84 predicate places. [2023-08-30 12:02:08,899 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 168 transitions, 1441 flow [2023-08-30 12:02:08,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.375) internal successors, (1641), 24 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:08,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:08,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:08,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:09,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:09,113 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:09,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:09,114 INFO L85 PathProgramCache]: Analyzing trace with hash -846278372, now seen corresponding path program 1 times [2023-08-30 12:02:09,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:09,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290328155] [2023-08-30 12:02:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:09,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:10,192 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 12:02:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:10,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290328155] [2023-08-30 12:02:10,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290328155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:10,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712674387] [2023-08-30 12:02:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:10,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:10,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:10,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:10,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 12:02:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:10,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 12:02:10,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:10,437 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 12:02:10,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:10,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:10,497 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 61 treesize of output 45 [2023-08-30 12:02:10,746 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 12:02:10,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712674387] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:10,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 12:02:10,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 13 [2023-08-30 12:02:10,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106685170] [2023-08-30 12:02:10,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:02:10,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 12:02:10,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:10,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 12:02:10,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-30 12:02:10,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 273 [2023-08-30 12:02:10,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 168 transitions, 1441 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:10,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:10,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 273 [2023-08-30 12:02:10,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:11,408 INFO L130 PetriNetUnfolder]: 2282/3749 cut-off events. [2023-08-30 12:02:11,408 INFO L131 PetriNetUnfolder]: For 46262/46309 co-relation queries the response was YES. [2023-08-30 12:02:11,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23112 conditions, 3749 events. 2282/3749 cut-off events. For 46262/46309 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 22686 event pairs, 167 based on Foata normal form. 66/3815 useless extension candidates. Maximal degree in co-relation 23065. Up to 1677 conditions per place. [2023-08-30 12:02:11,447 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 216 selfloop transitions, 74 changer transitions 3/304 dead transitions. [2023-08-30 12:02:11,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 304 transitions, 3307 flow [2023-08-30 12:02:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 12:02:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 12:02:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 775 transitions. [2023-08-30 12:02:11,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055468341182627 [2023-08-30 12:02:11,450 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 775 transitions. [2023-08-30 12:02:11,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 775 transitions. [2023-08-30 12:02:11,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:11,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 775 transitions. [2023-08-30 12:02:11,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.71428571428571) internal successors, (775), 7 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:11,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:11,456 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:11,456 INFO L175 Difference]: Start difference. First operand has 121 places, 168 transitions, 1441 flow. Second operand 7 states and 775 transitions. [2023-08-30 12:02:11,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 304 transitions, 3307 flow [2023-08-30 12:02:11,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 304 transitions, 3139 flow, removed 70 selfloop flow, removed 7 redundant places. [2023-08-30 12:02:11,652 INFO L231 Difference]: Finished difference. Result has 126 places, 217 transitions, 2169 flow [2023-08-30 12:02:11,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2169, PETRI_PLACES=126, PETRI_TRANSITIONS=217} [2023-08-30 12:02:11,653 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 89 predicate places. [2023-08-30 12:02:11,653 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 217 transitions, 2169 flow [2023-08-30 12:02:11,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:11,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:11,654 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:11,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:11,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:11,854 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:11,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:11,855 INFO L85 PathProgramCache]: Analyzing trace with hash -644454118, now seen corresponding path program 2 times [2023-08-30 12:02:11,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:11,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298908069] [2023-08-30 12:02:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:11,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:13,037 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 12:02:13,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:13,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298908069] [2023-08-30 12:02:13,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298908069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:13,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193782420] [2023-08-30 12:02:13,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:02:13,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:13,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:13,039 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:13,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 12:02:13,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 12:02:13,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:13,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 12:02:13,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:02:13,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:02:13,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193782420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:02:13,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:02:13,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 12 [2023-08-30 12:02:13,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142383552] [2023-08-30 12:02:13,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:02:13,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 12:02:13,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:13,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 12:02:13,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-30 12:02:13,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 273 [2023-08-30 12:02:13,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 217 transitions, 2169 flow. Second operand has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:13,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:13,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 273 [2023-08-30 12:02:13,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:13,713 INFO L130 PetriNetUnfolder]: 1828/3020 cut-off events. [2023-08-30 12:02:13,713 INFO L131 PetriNetUnfolder]: For 48386/48415 co-relation queries the response was YES. [2023-08-30 12:02:13,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20187 conditions, 3020 events. 1828/3020 cut-off events. For 48386/48415 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17482 event pairs, 284 based on Foata normal form. 45/3065 useless extension candidates. Maximal degree in co-relation 20133. Up to 2485 conditions per place. [2023-08-30 12:02:13,745 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 174 selfloop transitions, 52 changer transitions 0/237 dead transitions. [2023-08-30 12:02:13,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 237 transitions, 2785 flow [2023-08-30 12:02:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 12:02:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 12:02:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 670 transitions. [2023-08-30 12:02:13,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409035409035409 [2023-08-30 12:02:13,748 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 670 transitions. [2023-08-30 12:02:13,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 670 transitions. [2023-08-30 12:02:13,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:13,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 670 transitions. [2023-08-30 12:02:13,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.66666666666667) internal successors, (670), 6 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:13,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:13,752 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:13,752 INFO L175 Difference]: Start difference. First operand has 126 places, 217 transitions, 2169 flow. Second operand 6 states and 670 transitions. [2023-08-30 12:02:13,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 237 transitions, 2785 flow [2023-08-30 12:02:13,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 237 transitions, 2686 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-30 12:02:13,959 INFO L231 Difference]: Finished difference. Result has 130 places, 217 transitions, 2209 flow [2023-08-30 12:02:13,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2209, PETRI_PLACES=130, PETRI_TRANSITIONS=217} [2023-08-30 12:02:13,960 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 93 predicate places. [2023-08-30 12:02:13,961 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 217 transitions, 2209 flow [2023-08-30 12:02:13,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:13,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:13,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:13,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:14,167 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,SelfDestructingSolverStorable10 [2023-08-30 12:02:14,168 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:14,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:14,168 INFO L85 PathProgramCache]: Analyzing trace with hash 967492083, now seen corresponding path program 1 times [2023-08-30 12:02:14,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:14,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881973067] [2023-08-30 12:02:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:14,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:15,164 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 12:02:15,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:15,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881973067] [2023-08-30 12:02:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881973067] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:15,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560621645] [2023-08-30 12:02:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:15,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:15,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:15,166 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:15,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 12:02:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:15,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 12:02:15,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:15,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:02:15,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:02:15,514 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 12:02:15,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:15,546 WARN L839 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_452 (Array Int Int))) (< 0 (+ c_~sum~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_452) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) (= (mod |c_thread1Thread1of1ForFork2_~cond~0#1| 256) 0)) is different from false [2023-08-30 12:02:15,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:15,584 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 82 treesize of output 66 [2023-08-30 12:02:15,589 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 12:02:15,921 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 12:02:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560621645] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:15,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 12:02:15,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 21 [2023-08-30 12:02:15,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217915537] [2023-08-30 12:02:15,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:02:15,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 12:02:15,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:15,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 12:02:15,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=399, Unknown=1, NotChecked=40, Total=506 [2023-08-30 12:02:15,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 273 [2023-08-30 12:02:15,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 217 transitions, 2209 flow. Second operand has 8 states, 8 states have (on average 86.375) internal successors, (691), 8 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:15,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:15,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 273 [2023-08-30 12:02:15,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:16,915 INFO L130 PetriNetUnfolder]: 2726/4310 cut-off events. [2023-08-30 12:02:16,915 INFO L131 PetriNetUnfolder]: For 56355/56355 co-relation queries the response was YES. [2023-08-30 12:02:16,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28388 conditions, 4310 events. 2726/4310 cut-off events. For 56355/56355 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24506 event pairs, 570 based on Foata normal form. 49/4359 useless extension candidates. Maximal degree in co-relation 28333. Up to 3274 conditions per place. [2023-08-30 12:02:16,952 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 227 selfloop transitions, 112 changer transitions 1/340 dead transitions. [2023-08-30 12:02:16,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 340 transitions, 4248 flow [2023-08-30 12:02:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 12:02:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 12:02:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 828 transitions. [2023-08-30 12:02:16,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336996336996337 [2023-08-30 12:02:16,957 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 828 transitions. [2023-08-30 12:02:16,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 828 transitions. [2023-08-30 12:02:16,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:16,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 828 transitions. [2023-08-30 12:02:16,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:16,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:16,963 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:16,964 INFO L175 Difference]: Start difference. First operand has 130 places, 217 transitions, 2209 flow. Second operand 9 states and 828 transitions. [2023-08-30 12:02:16,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 340 transitions, 4248 flow [2023-08-30 12:02:17,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 340 transitions, 4125 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 12:02:17,233 INFO L231 Difference]: Finished difference. Result has 142 places, 289 transitions, 3568 flow [2023-08-30 12:02:17,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3568, PETRI_PLACES=142, PETRI_TRANSITIONS=289} [2023-08-30 12:02:17,235 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 105 predicate places. [2023-08-30 12:02:17,235 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 289 transitions, 3568 flow [2023-08-30 12:02:17,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 86.375) internal successors, (691), 8 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:17,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:17,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:17,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:17,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:17,441 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:17,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:17,442 INFO L85 PathProgramCache]: Analyzing trace with hash -464822802, now seen corresponding path program 3 times [2023-08-30 12:02:17,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:17,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125447716] [2023-08-30 12:02:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:17,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:18,494 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 12:02:18,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:18,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125447716] [2023-08-30 12:02:18,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125447716] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:18,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679041079] [2023-08-30 12:02:18,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 12:02:18,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:18,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:18,497 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:18,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 12:02:18,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 12:02:18,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 12:02:18,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:18,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:02:18,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:02:18,773 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 12:02:18,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:02:18,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679041079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:02:18,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:02:18,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-30 12:02:18,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511964605] [2023-08-30 12:02:18,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:02:18,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 12:02:18,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 12:02:18,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-30 12:02:18,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-08-30 12:02:18,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 289 transitions, 3568 flow. Second operand has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:18,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:18,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-08-30 12:02:18,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:19,546 INFO L130 PetriNetUnfolder]: 2389/3924 cut-off events. [2023-08-30 12:02:19,547 INFO L131 PetriNetUnfolder]: For 74669/74712 co-relation queries the response was YES. [2023-08-30 12:02:19,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28911 conditions, 3924 events. 2389/3924 cut-off events. For 74669/74712 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 23523 event pairs, 355 based on Foata normal form. 70/3994 useless extension candidates. Maximal degree in co-relation 28850. Up to 2336 conditions per place. [2023-08-30 12:02:19,589 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 203 selfloop transitions, 100 changer transitions 0/317 dead transitions. [2023-08-30 12:02:19,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 317 transitions, 4474 flow [2023-08-30 12:02:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 12:02:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 12:02:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2023-08-30 12:02:19,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2023-08-30 12:02:19,591 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2023-08-30 12:02:19,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2023-08-30 12:02:19,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:19,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2023-08-30 12:02:19,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:19,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:19,596 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:19,596 INFO L175 Difference]: Start difference. First operand has 142 places, 289 transitions, 3568 flow. Second operand 6 states and 639 transitions. [2023-08-30 12:02:19,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 317 transitions, 4474 flow [2023-08-30 12:02:19,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 317 transitions, 4396 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-08-30 12:02:19,855 INFO L231 Difference]: Finished difference. Result has 148 places, 293 transitions, 3847 flow [2023-08-30 12:02:19,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3847, PETRI_PLACES=148, PETRI_TRANSITIONS=293} [2023-08-30 12:02:19,856 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 111 predicate places. [2023-08-30 12:02:19,856 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 293 transitions, 3847 flow [2023-08-30 12:02:19,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:19,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:19,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:19,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:20,058 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,SelfDestructingSolverStorable12 [2023-08-30 12:02:20,058 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:20,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:20,059 INFO L85 PathProgramCache]: Analyzing trace with hash -840121789, now seen corresponding path program 1 times [2023-08-30 12:02:20,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:20,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206130306] [2023-08-30 12:02:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:20,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:20,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206130306] [2023-08-30 12:02:20,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206130306] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133852323] [2023-08-30 12:02:20,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:20,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:20,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:20,205 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:20,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 12:02:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 12:02:20,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:20,383 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 130 treesize of output 98 [2023-08-30 12:02:20,435 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 12:02:20,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:02:20,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133852323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:02:20,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:02:20,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2023-08-30 12:02:20,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928778984] [2023-08-30 12:02:20,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:02:20,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 12:02:20,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 12:02:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 12:02:20,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 273 [2023-08-30 12:02:20,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 293 transitions, 3847 flow. Second operand has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:20,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:20,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 273 [2023-08-30 12:02:20,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:21,495 INFO L130 PetriNetUnfolder]: 3166/5294 cut-off events. [2023-08-30 12:02:21,495 INFO L131 PetriNetUnfolder]: For 124220/124742 co-relation queries the response was YES. [2023-08-30 12:02:21,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41057 conditions, 5294 events. 3166/5294 cut-off events. For 124220/124742 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34164 event pairs, 556 based on Foata normal form. 304/5503 useless extension candidates. Maximal degree in co-relation 40993. Up to 2550 conditions per place. [2023-08-30 12:02:21,552 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 199 selfloop transitions, 85 changer transitions 22/325 dead transitions. [2023-08-30 12:02:21,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 325 transitions, 5127 flow [2023-08-30 12:02:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 12:02:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 12:02:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 506 transitions. [2023-08-30 12:02:21,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633699633699634 [2023-08-30 12:02:21,554 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 506 transitions. [2023-08-30 12:02:21,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 506 transitions. [2023-08-30 12:02:21,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:21,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 506 transitions. [2023-08-30 12:02:21,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:21,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:21,557 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:21,557 INFO L175 Difference]: Start difference. First operand has 148 places, 293 transitions, 3847 flow. Second operand 4 states and 506 transitions. [2023-08-30 12:02:21,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 325 transitions, 5127 flow [2023-08-30 12:02:22,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 325 transitions, 4918 flow, removed 40 selfloop flow, removed 10 redundant places. [2023-08-30 12:02:22,018 INFO L231 Difference]: Finished difference. Result has 139 places, 264 transitions, 3813 flow [2023-08-30 12:02:22,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3813, PETRI_PLACES=139, PETRI_TRANSITIONS=264} [2023-08-30 12:02:22,019 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 102 predicate places. [2023-08-30 12:02:22,019 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 264 transitions, 3813 flow [2023-08-30 12:02:22,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:22,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:22,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:22,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:22,220 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,SelfDestructingSolverStorable13 [2023-08-30 12:02:22,220 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:22,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash -464822803, now seen corresponding path program 2 times [2023-08-30 12:02:22,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:22,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863836190] [2023-08-30 12:02:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:22,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:23,170 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 12:02:23,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863836190] [2023-08-30 12:02:23,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863836190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803627796] [2023-08-30 12:02:23,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:02:23,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:23,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:23,172 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:23,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 12:02:23,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 12:02:23,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:23,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 12:02:23,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:23,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:02:23,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 12:02:23,461 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 12:02:23,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:02:23,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803627796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:02:23,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:02:23,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 12:02:23,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883341930] [2023-08-30 12:02:23,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:02:23,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 12:02:23,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 12:02:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-08-30 12:02:23,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-08-30 12:02:23,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 264 transitions, 3813 flow. Second operand has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:23,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:23,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-08-30 12:02:23,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:24,380 INFO L130 PetriNetUnfolder]: 2910/4963 cut-off events. [2023-08-30 12:02:24,380 INFO L131 PetriNetUnfolder]: For 92159/92304 co-relation queries the response was YES. [2023-08-30 12:02:24,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38549 conditions, 4963 events. 2910/4963 cut-off events. For 92159/92304 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31966 event pairs, 568 based on Foata normal form. 115/5075 useless extension candidates. Maximal degree in co-relation 38490. Up to 3087 conditions per place. [2023-08-30 12:02:24,429 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 161 selfloop transitions, 103 changer transitions 0/278 dead transitions. [2023-08-30 12:02:24,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 278 transitions, 4479 flow [2023-08-30 12:02:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 12:02:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 12:02:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 638 transitions. [2023-08-30 12:02:24,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894993894993895 [2023-08-30 12:02:24,433 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 638 transitions. [2023-08-30 12:02:24,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 638 transitions. [2023-08-30 12:02:24,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:24,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 638 transitions. [2023-08-30 12:02:24,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:24,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:24,437 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:24,437 INFO L175 Difference]: Start difference. First operand has 139 places, 264 transitions, 3813 flow. Second operand 6 states and 638 transitions. [2023-08-30 12:02:24,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 278 transitions, 4479 flow [2023-08-30 12:02:24,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 278 transitions, 4469 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-30 12:02:24,676 INFO L231 Difference]: Finished difference. Result has 144 places, 255 transitions, 4023 flow [2023-08-30 12:02:24,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4023, PETRI_PLACES=144, PETRI_TRANSITIONS=255} [2023-08-30 12:02:24,677 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 107 predicate places. [2023-08-30 12:02:24,677 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 255 transitions, 4023 flow [2023-08-30 12:02:24,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:24,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:24,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:24,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:24,884 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,SelfDestructingSolverStorable14 [2023-08-30 12:02:24,884 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:24,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:24,884 INFO L85 PathProgramCache]: Analyzing trace with hash -273968203, now seen corresponding path program 2 times [2023-08-30 12:02:24,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:24,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443877783] [2023-08-30 12:02:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:24,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:25,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:25,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443877783] [2023-08-30 12:02:25,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443877783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:25,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825164356] [2023-08-30 12:02:25,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:02:25,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:25,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:25,021 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:25,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 12:02:25,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:02:25,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 12:02:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:25,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:25,403 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 12:02:25,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825164356] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:02:25,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:02:25,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-30 12:02:25,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838799698] [2023-08-30 12:02:25,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:02:25,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 12:02:25,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 12:02:25,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-30 12:02:25,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 273 [2023-08-30 12:02:25,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 255 transitions, 4023 flow. Second operand has 16 states, 16 states have (on average 112.0625) internal successors, (1793), 16 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:25,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:25,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 273 [2023-08-30 12:02:25,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:26,193 INFO L130 PetriNetUnfolder]: 1876/3327 cut-off events. [2023-08-30 12:02:26,194 INFO L131 PetriNetUnfolder]: For 66275/66543 co-relation queries the response was YES. [2023-08-30 12:02:26,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26266 conditions, 3327 events. 1876/3327 cut-off events. For 66275/66543 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21032 event pairs, 782 based on Foata normal form. 93/3372 useless extension candidates. Maximal degree in co-relation 26204. Up to 2445 conditions per place. [2023-08-30 12:02:26,222 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 138 selfloop transitions, 3 changer transitions 81/230 dead transitions. [2023-08-30 12:02:26,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 230 transitions, 4027 flow [2023-08-30 12:02:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 12:02:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 12:02:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 811 transitions. [2023-08-30 12:02:26,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424385138670853 [2023-08-30 12:02:26,225 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 811 transitions. [2023-08-30 12:02:26,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 811 transitions. [2023-08-30 12:02:26,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:26,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 811 transitions. [2023-08-30 12:02:26,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.85714285714286) internal successors, (811), 7 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:26,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:26,229 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:26,229 INFO L175 Difference]: Start difference. First operand has 144 places, 255 transitions, 4023 flow. Second operand 7 states and 811 transitions. [2023-08-30 12:02:26,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 230 transitions, 4027 flow [2023-08-30 12:02:26,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 230 transitions, 3810 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-08-30 12:02:26,373 INFO L231 Difference]: Finished difference. Result has 138 places, 149 transitions, 2308 flow [2023-08-30 12:02:26,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3192, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2308, PETRI_PLACES=138, PETRI_TRANSITIONS=149} [2023-08-30 12:02:26,374 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 101 predicate places. [2023-08-30 12:02:26,374 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 149 transitions, 2308 flow [2023-08-30 12:02:26,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 112.0625) internal successors, (1793), 16 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:26,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:26,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:26,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 12:02:26,575 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:26,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1047368430, now seen corresponding path program 1 times [2023-08-30 12:02:26,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:26,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826832329] [2023-08-30 12:02:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:27,457 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 12:02:27,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:27,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826832329] [2023-08-30 12:02:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826832329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:27,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210713587] [2023-08-30 12:02:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:27,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:27,460 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:27,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 12:02:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:27,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 12:02:27,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:27,706 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 12:02:27,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:27,798 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:27,798 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 60 treesize of output 44 [2023-08-30 12:02:28,086 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 12:02:28,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210713587] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:28,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 12:02:28,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-08-30 12:02:28,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206343806] [2023-08-30 12:02:28,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:02:28,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 12:02:28,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:28,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 12:02:28,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-30 12:02:28,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 273 [2023-08-30 12:02:28,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 149 transitions, 2308 flow. Second operand has 7 states, 7 states have (on average 102.85714285714286) internal successors, (720), 7 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:28,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:28,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 273 [2023-08-30 12:02:28,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:28,930 INFO L130 PetriNetUnfolder]: 2410/3947 cut-off events. [2023-08-30 12:02:28,930 INFO L131 PetriNetUnfolder]: For 65497/65781 co-relation queries the response was YES. [2023-08-30 12:02:28,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29651 conditions, 3947 events. 2410/3947 cut-off events. For 65497/65781 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23425 event pairs, 559 based on Foata normal form. 28/3887 useless extension candidates. Maximal degree in co-relation 29592. Up to 2361 conditions per place. [2023-08-30 12:02:28,964 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 124 selfloop transitions, 87 changer transitions 1/214 dead transitions. [2023-08-30 12:02:28,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 214 transitions, 3684 flow [2023-08-30 12:02:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 12:02:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 12:02:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 758 transitions. [2023-08-30 12:02:28,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39665096807953953 [2023-08-30 12:02:28,966 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 758 transitions. [2023-08-30 12:02:28,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 758 transitions. [2023-08-30 12:02:28,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:28,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 758 transitions. [2023-08-30 12:02:28,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.28571428571429) internal successors, (758), 7 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:28,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:28,969 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:28,969 INFO L175 Difference]: Start difference. First operand has 138 places, 149 transitions, 2308 flow. Second operand 7 states and 758 transitions. [2023-08-30 12:02:28,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 214 transitions, 3684 flow [2023-08-30 12:02:29,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 214 transitions, 3516 flow, removed 56 selfloop flow, removed 16 redundant places. [2023-08-30 12:02:29,095 INFO L231 Difference]: Finished difference. Result has 112 places, 185 transitions, 3159 flow [2023-08-30 12:02:29,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3159, PETRI_PLACES=112, PETRI_TRANSITIONS=185} [2023-08-30 12:02:29,095 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 75 predicate places. [2023-08-30 12:02:29,095 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 185 transitions, 3159 flow [2023-08-30 12:02:29,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.85714285714286) internal successors, (720), 7 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:29,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:29,096 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:29,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:29,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:29,302 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:29,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1045456349, now seen corresponding path program 1 times [2023-08-30 12:02:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:29,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504709237] [2023-08-30 12:02:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:29,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:30,131 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 12:02:30,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:30,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504709237] [2023-08-30 12:02:30,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504709237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:30,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117265615] [2023-08-30 12:02:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:30,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:30,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:30,137 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:30,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 12:02:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:30,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 12:02:30,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:30,390 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 12:02:30,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:30,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:30,443 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 61 treesize of output 45 [2023-08-30 12:02:30,715 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 12:02:30,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117265615] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:30,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 12:02:30,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 17 [2023-08-30 12:02:30,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700764437] [2023-08-30 12:02:30,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:02:30,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 12:02:30,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:30,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 12:02:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-08-30 12:02:30,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 273 [2023-08-30 12:02:30,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 185 transitions, 3159 flow. Second operand has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:30,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:30,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 273 [2023-08-30 12:02:30,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:31,419 INFO L130 PetriNetUnfolder]: 1936/3336 cut-off events. [2023-08-30 12:02:31,419 INFO L131 PetriNetUnfolder]: For 59955/60082 co-relation queries the response was YES. [2023-08-30 12:02:31,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26289 conditions, 3336 events. 1936/3336 cut-off events. For 59955/60082 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20537 event pairs, 200 based on Foata normal form. 175/3507 useless extension candidates. Maximal degree in co-relation 26237. Up to 1528 conditions per place. [2023-08-30 12:02:31,445 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 105 selfloop transitions, 100 changer transitions 4/216 dead transitions. [2023-08-30 12:02:31,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 216 transitions, 3933 flow [2023-08-30 12:02:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 12:02:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 12:02:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 772 transitions. [2023-08-30 12:02:31,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40397697540554683 [2023-08-30 12:02:31,447 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 772 transitions. [2023-08-30 12:02:31,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 772 transitions. [2023-08-30 12:02:31,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:31,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 772 transitions. [2023-08-30 12:02:31,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:31,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:31,450 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:31,450 INFO L175 Difference]: Start difference. First operand has 112 places, 185 transitions, 3159 flow. Second operand 7 states and 772 transitions. [2023-08-30 12:02:31,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 216 transitions, 3933 flow [2023-08-30 12:02:31,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 216 transitions, 3745 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-08-30 12:02:31,542 INFO L231 Difference]: Finished difference. Result has 116 places, 182 transitions, 3140 flow [2023-08-30 12:02:31,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3140, PETRI_PLACES=116, PETRI_TRANSITIONS=182} [2023-08-30 12:02:31,543 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 79 predicate places. [2023-08-30 12:02:31,543 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 182 transitions, 3140 flow [2023-08-30 12:02:31,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:31,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:31,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:31,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-30 12:02:31,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 12:02:31,744 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:31,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1045456350, now seen corresponding path program 2 times [2023-08-30 12:02:31,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:31,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221741672] [2023-08-30 12:02:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:31,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:32,253 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 12:02:32,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:32,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221741672] [2023-08-30 12:02:32,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221741672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:32,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903786584] [2023-08-30 12:02:32,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:02:32,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:32,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:32,256 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:32,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 12:02:32,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 12:02:32,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:32,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 12:02:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:32,499 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 12:02:32,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 12:02:32,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903786584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 12:02:32,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 12:02:32,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-30 12:02:32,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375861784] [2023-08-30 12:02:32,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 12:02:32,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 12:02:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 12:02:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-30 12:02:32,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-08-30 12:02:32,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 182 transitions, 3140 flow. Second operand has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:32,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:32,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-08-30 12:02:32,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:33,178 INFO L130 PetriNetUnfolder]: 1864/3222 cut-off events. [2023-08-30 12:02:33,178 INFO L131 PetriNetUnfolder]: For 50599/50686 co-relation queries the response was YES. [2023-08-30 12:02:33,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24637 conditions, 3222 events. 1864/3222 cut-off events. For 50599/50686 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19471 event pairs, 364 based on Foata normal form. 135/3353 useless extension candidates. Maximal degree in co-relation 24585. Up to 2207 conditions per place. [2023-08-30 12:02:33,214 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 94 selfloop transitions, 89 changer transitions 0/190 dead transitions. [2023-08-30 12:02:33,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 190 transitions, 3518 flow [2023-08-30 12:02:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 12:02:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 12:02:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-08-30 12:02:33,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065934065934066 [2023-08-30 12:02:33,217 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-08-30 12:02:33,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-08-30 12:02:33,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:33,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-08-30 12:02:33,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:33,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:33,220 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:33,220 INFO L175 Difference]: Start difference. First operand has 116 places, 182 transitions, 3140 flow. Second operand 5 states and 555 transitions. [2023-08-30 12:02:33,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 190 transitions, 3518 flow [2023-08-30 12:02:33,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 190 transitions, 3386 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-30 12:02:33,317 INFO L231 Difference]: Finished difference. Result has 114 places, 175 transitions, 3072 flow [2023-08-30 12:02:33,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3072, PETRI_PLACES=114, PETRI_TRANSITIONS=175} [2023-08-30 12:02:33,318 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 77 predicate places. [2023-08-30 12:02:33,318 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 175 transitions, 3072 flow [2023-08-30 12:02:33,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:33,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:33,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:33,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:33,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:33,525 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:33,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash -665209678, now seen corresponding path program 1 times [2023-08-30 12:02:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:33,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375185899] [2023-08-30 12:02:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:34,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:34,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375185899] [2023-08-30 12:02:34,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375185899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:34,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874249506] [2023-08-30 12:02:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:34,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:34,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:34,327 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:34,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 12:02:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:34,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 12:02:34,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:34,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:35,211 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 12:02:35,211 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 212 treesize of output 183 [2023-08-30 12:02:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:36,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874249506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:02:36,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:02:36,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 12:02:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660545560] [2023-08-30 12:02:36,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:02:36,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 12:02:36,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:36,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 12:02:36,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2023-08-30 12:02:37,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 273 [2023-08-30 12:02:37,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 175 transitions, 3072 flow. Second operand has 27 states, 27 states have (on average 92.44444444444444) internal successors, (2496), 27 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:37,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:37,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 273 [2023-08-30 12:02:37,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:39,990 INFO L130 PetriNetUnfolder]: 3996/6751 cut-off events. [2023-08-30 12:02:39,991 INFO L131 PetriNetUnfolder]: For 109147/109250 co-relation queries the response was YES. [2023-08-30 12:02:40,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49971 conditions, 6751 events. 3996/6751 cut-off events. For 109147/109250 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 46285 event pairs, 411 based on Foata normal form. 272/7018 useless extension candidates. Maximal degree in co-relation 49920. Up to 3250 conditions per place. [2023-08-30 12:02:40,044 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 241 selfloop transitions, 253 changer transitions 9/510 dead transitions. [2023-08-30 12:02:40,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 510 transitions, 8906 flow [2023-08-30 12:02:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 12:02:40,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 12:02:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2946 transitions. [2023-08-30 12:02:40,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597069597069597 [2023-08-30 12:02:40,049 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2946 transitions. [2023-08-30 12:02:40,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2946 transitions. [2023-08-30 12:02:40,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:02:40,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2946 transitions. [2023-08-30 12:02:40,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 98.2) internal successors, (2946), 30 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:40,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 273.0) internal successors, (8463), 31 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:40,061 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 273.0) internal successors, (8463), 31 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:40,061 INFO L175 Difference]: Start difference. First operand has 114 places, 175 transitions, 3072 flow. Second operand 30 states and 2946 transitions. [2023-08-30 12:02:40,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 510 transitions, 8906 flow [2023-08-30 12:02:40,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 510 transitions, 8736 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 12:02:40,139 INFO L231 Difference]: Finished difference. Result has 161 places, 357 transitions, 7220 flow [2023-08-30 12:02:40,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7220, PETRI_PLACES=161, PETRI_TRANSITIONS=357} [2023-08-30 12:02:40,140 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 124 predicate places. [2023-08-30 12:02:40,140 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 357 transitions, 7220 flow [2023-08-30 12:02:40,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 92.44444444444444) internal successors, (2496), 27 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:40,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:02:40,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:02:40,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 12:02:40,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:40,341 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:02:40,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:02:40,342 INFO L85 PathProgramCache]: Analyzing trace with hash -665209679, now seen corresponding path program 3 times [2023-08-30 12:02:40,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:02:40,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810127853] [2023-08-30 12:02:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:02:40,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:02:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:02:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:41,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:02:41,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810127853] [2023-08-30 12:02:41,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810127853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:02:41,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008648474] [2023-08-30 12:02:41,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 12:02:41,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:02:41,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:02:41,089 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:02:41,092 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 12:02:41,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 12:02:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:02:41,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 12:02:41,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:02:41,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:02:41,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:02:41,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 12:02:41,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:02:41,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 12:02:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:41,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:02:42,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:42,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2023-08-30 12:02:42,798 INFO L321 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-08-30 12:02:42,798 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 397 treesize of output 381 [2023-08-30 12:02:42,823 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:02:42,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:02:42,833 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 106 treesize of output 104 [2023-08-30 12:02:42,864 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-30 12:02:42,865 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 111 treesize of output 91 [2023-08-30 12:02:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:02:44,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008648474] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:02:44,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:02:44,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-08-30 12:02:44,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969992950] [2023-08-30 12:02:44,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:02:44,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 12:02:44,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:02:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 12:02:44,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=742, Unknown=2, NotChecked=0, Total=870 [2023-08-30 12:02:45,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 273 [2023-08-30 12:02:45,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 357 transitions, 7220 flow. Second operand has 30 states, 30 states have (on average 71.5) internal successors, (2145), 30 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:02:45,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:02:45,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 273 [2023-08-30 12:02:45,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:02:48,275 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] [2023-08-30 12:03:05,576 INFO L130 PetriNetUnfolder]: 11336/18013 cut-off events. [2023-08-30 12:03:05,576 INFO L131 PetriNetUnfolder]: For 396718/396718 co-relation queries the response was YES. [2023-08-30 12:03:05,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145413 conditions, 18013 events. 11336/18013 cut-off events. For 396718/396718 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 126427 event pairs, 1350 based on Foata normal form. 370/18383 useless extension candidates. Maximal degree in co-relation 145342. Up to 8164 conditions per place. [2023-08-30 12:03:05,786 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 617 selfloop transitions, 909 changer transitions 25/1551 dead transitions. [2023-08-30 12:03:05,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1551 transitions, 29923 flow [2023-08-30 12:03:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-08-30 12:03:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-08-30 12:03:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 7661 transitions. [2023-08-30 12:03:05,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2806227106227106 [2023-08-30 12:03:05,802 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 7661 transitions. [2023-08-30 12:03:05,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 7661 transitions. [2023-08-30 12:03:05,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:05,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 7661 transitions. [2023-08-30 12:03:05,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 76.61) internal successors, (7661), 100 states have internal predecessors, (7661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:05,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 273.0) internal successors, (27573), 101 states have internal predecessors, (27573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:05,852 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 273.0) internal successors, (27573), 101 states have internal predecessors, (27573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:05,853 INFO L175 Difference]: Start difference. First operand has 161 places, 357 transitions, 7220 flow. Second operand 100 states and 7661 transitions. [2023-08-30 12:03:05,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1551 transitions, 29923 flow [2023-08-30 12:03:07,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1551 transitions, 28111 flow, removed 839 selfloop flow, removed 4 redundant places. [2023-08-30 12:03:07,636 INFO L231 Difference]: Finished difference. Result has 312 places, 1175 transitions, 24915 flow [2023-08-30 12:03:07,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6703, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=24915, PETRI_PLACES=312, PETRI_TRANSITIONS=1175} [2023-08-30 12:03:07,637 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 275 predicate places. [2023-08-30 12:03:07,637 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 1175 transitions, 24915 flow [2023-08-30 12:03:07,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 71.5) internal successors, (2145), 30 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:07,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:07,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:07,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:07,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:07,839 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:03:07,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1541597126, now seen corresponding path program 2 times [2023-08-30 12:03:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:07,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353774502] [2023-08-30 12:03:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:08,676 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 12:03:08,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:08,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353774502] [2023-08-30 12:03:08,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353774502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:08,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998989700] [2023-08-30 12:03:08,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:03:08,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:08,678 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:08,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 12:03:08,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:03:08,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:03:08,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 12:03:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:08,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:03:08,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:03:08,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 12:03:09,311 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 12:03:09,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:11,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:03:11,070 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 153 treesize of output 105 [2023-08-30 12:03:11,100 INFO L321 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2023-08-30 12:03:11,101 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 715 treesize of output 646 [2023-08-30 12:03:11,122 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:03:11,123 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:03:11,124 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:03:11,125 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 12:03:11,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:03:11,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 187 [2023-08-30 12:03:11,162 INFO L321 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2023-08-30 12:03:11,162 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 213 treesize of output 159 [2023-08-30 12:03:11,745 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 12:03:11,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998989700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:11,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:11,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-30 12:03:11,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86039571] [2023-08-30 12:03:11,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:11,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 12:03:11,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 12:03:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=688, Unknown=4, NotChecked=0, Total=930 [2023-08-30 12:03:12,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 273 [2023-08-30 12:03:12,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1175 transitions, 24915 flow. Second operand has 31 states, 31 states have (on average 71.54838709677419) internal successors, (2218), 31 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:12,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:12,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 273 [2023-08-30 12:03:12,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:30,820 INFO L130 PetriNetUnfolder]: 13877/22547 cut-off events. [2023-08-30 12:03:30,821 INFO L131 PetriNetUnfolder]: For 1803148/1803148 co-relation queries the response was YES. [2023-08-30 12:03:31,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261393 conditions, 22547 events. 13877/22547 cut-off events. For 1803148/1803148 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 166399 event pairs, 1481 based on Foata normal form. 328/22875 useless extension candidates. Maximal degree in co-relation 261266. Up to 10481 conditions per place. [2023-08-30 12:03:31,214 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 804 selfloop transitions, 1214 changer transitions 18/2036 dead transitions. [2023-08-30 12:03:31,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 2036 transitions, 46423 flow [2023-08-30 12:03:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 12:03:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 12:03:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3154 transitions. [2023-08-30 12:03:31,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28178325739301346 [2023-08-30 12:03:31,219 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3154 transitions. [2023-08-30 12:03:31,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3154 transitions. [2023-08-30 12:03:31,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:03:31,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3154 transitions. [2023-08-30 12:03:31,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 76.92682926829268) internal successors, (3154), 41 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:31,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 273.0) internal successors, (11466), 42 states have internal predecessors, (11466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:31,234 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 273.0) internal successors, (11466), 42 states have internal predecessors, (11466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:31,235 INFO L175 Difference]: Start difference. First operand has 312 places, 1175 transitions, 24915 flow. Second operand 41 states and 3154 transitions. [2023-08-30 12:03:31,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 2036 transitions, 46423 flow [2023-08-30 12:03:41,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 2036 transitions, 40419 flow, removed 2947 selfloop flow, removed 13 redundant places. [2023-08-30 12:03:41,705 INFO L231 Difference]: Finished difference. Result has 360 places, 1774 transitions, 37580 flow [2023-08-30 12:03:41,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=20620, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=686, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=37580, PETRI_PLACES=360, PETRI_TRANSITIONS=1774} [2023-08-30 12:03:41,706 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 323 predicate places. [2023-08-30 12:03:41,706 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1774 transitions, 37580 flow [2023-08-30 12:03:41,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 71.54838709677419) internal successors, (2218), 31 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:41,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:03:41,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:03:41,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 12:03:41,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:41,907 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:03:41,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:03:41,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1296655661, now seen corresponding path program 4 times [2023-08-30 12:03:41,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:03:41,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198306905] [2023-08-30 12:03:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:03:41,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:03:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:03:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:03:42,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:03:42,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198306905] [2023-08-30 12:03:42,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198306905] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:03:42,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554136715] [2023-08-30 12:03:42,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 12:03:42,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:03:42,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:03:42,629 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:03:42,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 12:03:42,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 12:03:42,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:03:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 12:03:42,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:03:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:42,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:03:43,297 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 12:03:43,297 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 213 treesize of output 184 [2023-08-30 12:03:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:03:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554136715] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:03:43,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:03:43,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 20 [2023-08-30 12:03:43,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057549921] [2023-08-30 12:03:43,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:03:43,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 12:03:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:03:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 12:03:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-08-30 12:03:44,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 273 [2023-08-30 12:03:44,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1774 transitions, 37580 flow. Second operand has 22 states, 22 states have (on average 94.81818181818181) internal successors, (2086), 22 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:03:44,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:03:44,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 273 [2023-08-30 12:03:44,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:03:59,783 INFO L130 PetriNetUnfolder]: 16768/27367 cut-off events. [2023-08-30 12:03:59,783 INFO L131 PetriNetUnfolder]: For 2419565/2423808 co-relation queries the response was YES. [2023-08-30 12:04:00,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315667 conditions, 27367 events. 16768/27367 cut-off events. For 2419565/2423808 co-relation queries the response was YES. Maximal size of possible extension queue 1636. Compared 217013 event pairs, 4196 based on Foata normal form. 477/27189 useless extension candidates. Maximal degree in co-relation 315518. Up to 15258 conditions per place. [2023-08-30 12:04:00,325 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 1664 selfloop transitions, 671 changer transitions 31/2422 dead transitions. [2023-08-30 12:04:00,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 2422 transitions, 53868 flow [2023-08-30 12:04:00,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 12:04:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 12:04:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3091 transitions. [2023-08-30 12:04:00,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3652369136240104 [2023-08-30 12:04:00,330 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3091 transitions. [2023-08-30 12:04:00,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3091 transitions. [2023-08-30 12:04:00,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:04:00,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3091 transitions. [2023-08-30 12:04:00,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 99.70967741935483) internal successors, (3091), 31 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:00,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:00,341 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:00,341 INFO L175 Difference]: Start difference. First operand has 360 places, 1774 transitions, 37580 flow. Second operand 31 states and 3091 transitions. [2023-08-30 12:04:00,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 2422 transitions, 53868 flow [2023-08-30 12:04:16,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 2422 transitions, 51940 flow, removed 909 selfloop flow, removed 7 redundant places. [2023-08-30 12:04:16,255 INFO L231 Difference]: Finished difference. Result has 392 places, 2068 transitions, 44217 flow [2023-08-30 12:04:16,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=35849, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=44217, PETRI_PLACES=392, PETRI_TRANSITIONS=2068} [2023-08-30 12:04:16,257 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 355 predicate places. [2023-08-30 12:04:16,258 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 2068 transitions, 44217 flow [2023-08-30 12:04:16,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 94.81818181818181) internal successors, (2086), 22 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:16,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:04:16,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:04:16,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 12:04:16,465 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,SelfDestructingSolverStorable22 [2023-08-30 12:04:16,466 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:04:16,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:04:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1628308683, now seen corresponding path program 1 times [2023-08-30 12:04:16,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:04:16,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769276810] [2023-08-30 12:04:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:04:16,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:04:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:04:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:04:17,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:04:17,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769276810] [2023-08-30 12:04:17,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769276810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:04:17,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256342543] [2023-08-30 12:04:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:04:17,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:04:17,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:04:17,394 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:04:17,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 12:04:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:04:17,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 12:04:17,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:04:17,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:04:17,625 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 18 [2023-08-30 12:04:17,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:04:17,684 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 12:04:17,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:04:17,744 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 12:04:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:04:18,123 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 29 treesize of output 29 [2023-08-30 12:04:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:04:18,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:04:18,183 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1013 (Array Int Int))) (< (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1013) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-30 12:04:19,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:19,080 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 158 treesize of output 103 [2023-08-30 12:04:19,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:19,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2061 treesize of output 1908 [2023-08-30 12:04:19,152 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 104 treesize of output 76 [2023-08-30 12:04:19,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:19,183 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 314 treesize of output 286 [2023-08-30 12:04:19,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:04:19,217 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 250 treesize of output 254 [2023-08-30 12:04:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:04:27,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256342543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:04:27,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:04:27,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-08-30 12:04:27,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666676704] [2023-08-30 12:04:27,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:04:27,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 12:04:27,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:04:27,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 12:04:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=4, NotChecked=60, Total=1056 [2023-08-30 12:04:27,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-08-30 12:04:27,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 2068 transitions, 44217 flow. Second operand has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:04:27,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:04:27,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-08-30 12:04:27,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:04:33,453 WARN L222 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 123 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:04:53,471 WARN L222 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 171 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:05:21,154 INFO L130 PetriNetUnfolder]: 30093/48117 cut-off events. [2023-08-30 12:05:21,155 INFO L131 PetriNetUnfolder]: For 5212634/5212634 co-relation queries the response was YES. [2023-08-30 12:05:22,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609329 conditions, 48117 events. 30093/48117 cut-off events. For 5212634/5212634 co-relation queries the response was YES. Maximal size of possible extension queue 2240. Compared 385345 event pairs, 3427 based on Foata normal form. 2088/50205 useless extension candidates. Maximal degree in co-relation 609170. Up to 22103 conditions per place. [2023-08-30 12:05:22,698 INFO L137 encePairwiseOnDemand]: 257/273 looper letters, 2014 selfloop transitions, 2640 changer transitions 94/4748 dead transitions. [2023-08-30 12:05:22,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 4748 transitions, 113517 flow [2023-08-30 12:05:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-30 12:05:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-30 12:05:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4733 transitions. [2023-08-30 12:05:22,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27089056776556775 [2023-08-30 12:05:22,706 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4733 transitions. [2023-08-30 12:05:22,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4733 transitions. [2023-08-30 12:05:22,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:05:22,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4733 transitions. [2023-08-30 12:05:22,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 73.953125) internal successors, (4733), 64 states have internal predecessors, (4733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:22,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 273.0) internal successors, (17745), 65 states have internal predecessors, (17745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:22,732 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 273.0) internal successors, (17745), 65 states have internal predecessors, (17745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:05:22,732 INFO L175 Difference]: Start difference. First operand has 392 places, 2068 transitions, 44217 flow. Second operand 64 states and 4733 transitions. [2023-08-30 12:05:22,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 4748 transitions, 113517 flow [2023-08-30 12:06:08,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 4748 transitions, 110746 flow, removed 1011 selfloop flow, removed 9 redundant places. [2023-08-30 12:06:08,268 INFO L231 Difference]: Finished difference. Result has 474 places, 3742 transitions, 91811 flow [2023-08-30 12:06:08,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=40092, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=91811, PETRI_PLACES=474, PETRI_TRANSITIONS=3742} [2023-08-30 12:06:08,271 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 437 predicate places. [2023-08-30 12:06:08,271 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 3742 transitions, 91811 flow [2023-08-30 12:06:08,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:06:08,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:06:08,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:06:08,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 12:06:08,478 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,SelfDestructingSolverStorable23 [2023-08-30 12:06:08,479 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:06:08,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:06:08,479 INFO L85 PathProgramCache]: Analyzing trace with hash 13853192, now seen corresponding path program 1 times [2023-08-30 12:06:08,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:06:08,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663508745] [2023-08-30 12:06:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:06:08,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:06:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:06:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:06:09,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:06:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663508745] [2023-08-30 12:06:09,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663508745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:06:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672846325] [2023-08-30 12:06:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:06:09,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:06:09,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:06:09,376 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:06:09,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 12:06:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:06:09,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 12:06:09,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:06:09,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 12:06:09,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:06:09,644 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 20 treesize of output 22 [2023-08-30 12:06:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:06:09,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 12:06:10,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:06:10,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 32 [2023-08-30 12:06:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:06:10,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:06:13,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:06:13,062 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 97 treesize of output 73 [2023-08-30 12:06:13,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:06:13,089 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 1051 treesize of output 1011 [2023-08-30 12:06:13,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:06:13,122 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 167 treesize of output 147 [2023-08-30 12:06:13,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:06:13,147 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 129 treesize of output 128 [2023-08-30 12:06:14,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:06:14,393 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 110 treesize of output 58 [2023-08-30 12:06:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:06:14,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672846325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:06:14,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:06:14,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-08-30 12:06:14,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846865502] [2023-08-30 12:06:14,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:06:14,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 12:06:14,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:06:14,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 12:06:14,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=908, Unknown=6, NotChecked=0, Total=1056 [2023-08-30 12:06:16,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:18,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:20,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:23,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:25,096 WARN L539 Checker$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 12:06:27,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:29,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:31,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:33,544 WARN L539 Checker$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 12:06:35,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:35,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-08-30 12:06:35,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 3742 transitions, 91811 flow. Second operand has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:06:35,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:06:35,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-08-30 12:06:35,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:06:46,457 WARN L222 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 119 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:06:49,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:51,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:06:58,148 WARN L222 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 136 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:07:07,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:15,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:17,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:32,659 WARN L222 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 118 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 12:07:35,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:39,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:41,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:07:58,628 WARN L539 Checker$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 12:08:00,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:08:51,349 INFO L130 PetriNetUnfolder]: 36593/58499 cut-off events. [2023-08-30 12:08:51,349 INFO L131 PetriNetUnfolder]: For 6488988/6488988 co-relation queries the response was YES. [2023-08-30 12:08:52,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832342 conditions, 58499 events. 36593/58499 cut-off events. For 6488988/6488988 co-relation queries the response was YES. Maximal size of possible extension queue 2774. Compared 484100 event pairs, 8258 based on Foata normal form. 834/59333 useless extension candidates. Maximal degree in co-relation 832157. Up to 35768 conditions per place. [2023-08-30 12:08:53,418 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 3272 selfloop transitions, 2086 changer transitions 82/5440 dead transitions. [2023-08-30 12:08:53,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 5440 transitions, 141102 flow [2023-08-30 12:08:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 12:08:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 12:08:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4120 transitions. [2023-08-30 12:08:53,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26949241234955523 [2023-08-30 12:08:53,422 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4120 transitions. [2023-08-30 12:08:53,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4120 transitions. [2023-08-30 12:08:53,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:08:53,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4120 transitions. [2023-08-30 12:08:53,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 73.57142857142857) internal successors, (4120), 56 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:53,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 273.0) internal successors, (15561), 57 states have internal predecessors, (15561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:53,440 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 273.0) internal successors, (15561), 57 states have internal predecessors, (15561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:08:53,440 INFO L175 Difference]: Start difference. First operand has 474 places, 3742 transitions, 91811 flow. Second operand 56 states and 4120 transitions. [2023-08-30 12:08:53,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 5440 transitions, 141102 flow [2023-08-30 12:10:22,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 5440 transitions, 129309 flow, removed 5872 selfloop flow, removed 11 redundant places. [2023-08-30 12:10:22,178 INFO L231 Difference]: Finished difference. Result has 545 places, 4700 transitions, 112056 flow [2023-08-30 12:10:22,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=82741, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1987, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=112056, PETRI_PLACES=545, PETRI_TRANSITIONS=4700} [2023-08-30 12:10:22,181 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 508 predicate places. [2023-08-30 12:10:22,181 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 4700 transitions, 112056 flow [2023-08-30 12:10:22,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:22,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:10:22,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:10:22,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 12:10:22,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:22,382 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:10:22,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:10:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash 240982344, now seen corresponding path program 2 times [2023-08-30 12:10:22,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:10:22,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139501883] [2023-08-30 12:10:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:10:22,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:10:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:10:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:23,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:10:23,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139501883] [2023-08-30 12:10:23,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139501883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:10:23,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708941335] [2023-08-30 12:10:23,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 12:10:23,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:10:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:10:23,184 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:10:23,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 12:10:23,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 12:10:23,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:10:23,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 12:10:23,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:10:23,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 12:10:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:10:23,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:10:23,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:10:23,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 12:10:23,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:10:23,898 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 12:10:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:23,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:10:24,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:24,587 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 94 treesize of output 70 [2023-08-30 12:10:24,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:24,616 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 4011 treesize of output 3639 [2023-08-30 12:10:24,647 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 211 treesize of output 183 [2023-08-30 12:10:24,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:24,670 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 247 treesize of output 215 [2023-08-30 12:10:24,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:10:24,689 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 134 treesize of output 127 [2023-08-30 12:10:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:10:26,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708941335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:10:26,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:10:26,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-08-30 12:10:26,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318422031] [2023-08-30 12:10:26,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:10:26,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 12:10:26,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:10:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 12:10:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=969, Unknown=4, NotChecked=0, Total=1122 [2023-08-30 12:10:28,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-08-30 12:10:28,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 4700 transitions, 112056 flow. Second operand has 34 states, 34 states have (on average 68.41176470588235) internal successors, (2326), 34 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:10:28,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:10:28,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-08-30 12:10:28,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:10:31,113 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 12:10:33,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:10:35,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:10:42,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:10:44,575 WARN L539 Checker$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 12:10:46,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:10:53,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:10:57,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:11:08,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:11:10,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:11:14,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 12:12:31,569 INFO L130 PetriNetUnfolder]: 50765/82489 cut-off events. [2023-08-30 12:12:31,569 INFO L131 PetriNetUnfolder]: For 9629848/9629848 co-relation queries the response was YES. [2023-08-30 12:12:33,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152814 conditions, 82489 events. 50765/82489 cut-off events. For 9629848/9629848 co-relation queries the response was YES. Maximal size of possible extension queue 3800. Compared 723238 event pairs, 4963 based on Foata normal form. 4949/87438 useless extension candidates. Maximal degree in co-relation 1152603. Up to 33941 conditions per place. [2023-08-30 12:12:34,371 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 2761 selfloop transitions, 4938 changer transitions 46/7745 dead transitions. [2023-08-30 12:12:34,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 7745 transitions, 193336 flow [2023-08-30 12:12:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 12:12:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 12:12:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4167 transitions. [2023-08-30 12:12:34,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27256671899529045 [2023-08-30 12:12:34,376 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4167 transitions. [2023-08-30 12:12:34,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4167 transitions. [2023-08-30 12:12:34,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:12:34,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4167 transitions. [2023-08-30 12:12:34,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 74.41071428571429) internal successors, (4167), 56 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:34,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 273.0) internal successors, (15561), 57 states have internal predecessors, (15561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:34,390 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 273.0) internal successors, (15561), 57 states have internal predecessors, (15561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:12:34,390 INFO L175 Difference]: Start difference. First operand has 545 places, 4700 transitions, 112056 flow. Second operand 56 states and 4167 transitions. [2023-08-30 12:12:34,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 7745 transitions, 193336 flow [2023-08-30 12:15:02,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 7745 transitions, 190140 flow, removed 1484 selfloop flow, removed 20 redundant places. [2023-08-30 12:15:02,985 INFO L231 Difference]: Finished difference. Result has 609 places, 6810 transitions, 178660 flow [2023-08-30 12:15:02,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=99669, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2813, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=178660, PETRI_PLACES=609, PETRI_TRANSITIONS=6810} [2023-08-30 12:15:02,989 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 572 predicate places. [2023-08-30 12:15:02,989 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 6810 transitions, 178660 flow [2023-08-30 12:15:02,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 68.41176470588235) internal successors, (2326), 34 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:15:02,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:15:02,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:15:02,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 12:15:03,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:15:03,196 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:15:03,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:15:03,197 INFO L85 PathProgramCache]: Analyzing trace with hash 601829409, now seen corresponding path program 2 times [2023-08-30 12:15:03,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:15:03,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039700304] [2023-08-30 12:15:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:15:03,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:15:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15