./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-nonblocking-cntr-alt.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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:21:06,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:21:06,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:21:06,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:21:06,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:21:06,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:21:06,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:21:06,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:21:06,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:21:06,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:21:06,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:21:06,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:21:06,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:21:06,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:21:06,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:21:06,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:21:06,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:21:06,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:21:06,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:21:06,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:21:06,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:21:06,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:21:06,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:21:06,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:21:06,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:21:06,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:21:06,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:21:06,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:21:06,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:21:06,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:21:06,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:21:06,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:21:06,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:21:06,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:21:06,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:21:06,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:21:06,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:21:06,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:21:06,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:21:06,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:21:06,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:21:06,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:21:06,505 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:21:06,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:21:06,506 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:21:06,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:21:06,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:21:06,507 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:21:06,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:21:06,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:21:06,508 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:21:06,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:21:06,510 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:21:06,510 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:21:06,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:21:06,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:21:06,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:21:06,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:21:06,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:21:06,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:21:06,511 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:21:06,511 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:21:06,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:21:06,512 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:21:06,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:21:06,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:21:06,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:21:06,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:21:06,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:21:06,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:21:06,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:21:06,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:21:06,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:21:06,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:21:06,514 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:21:06,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:21:06,514 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:21:06,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:21:06,515 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:21:06,515 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:21:06,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:21:06,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:21:06,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:21:06,880 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:21:06,880 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:21:06,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-09-01 08:21:08,115 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:21:08,339 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:21:08,339 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-09-01 08:21:08,349 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0257c6b/7b0cf4f8f4d74e23811a4677e9318b14/FLAGff5e4fb3b [2023-09-01 08:21:08,367 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0257c6b/7b0cf4f8f4d74e23811a4677e9318b14 [2023-09-01 08:21:08,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:21:08,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:21:08,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:21:08,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:21:08,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:21:08,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dcd0635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08, skipping insertion in model container [2023-09-01 08:21:08,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:21:08,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:21:08,584 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-09-01 08:21:08,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:21:08,596 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:21:08,631 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-09-01 08:21:08,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:21:08,639 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:21:08,640 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:21:08,645 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:21:08,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08 WrapperNode [2023-09-01 08:21:08,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:21:08,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:21:08,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:21:08,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:21:08,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,691 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2023-09-01 08:21:08,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:21:08,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:21:08,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:21:08,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:21:08,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,728 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:21:08,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:21:08,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:21:08,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:21:08,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (1/1) ... [2023-09-01 08:21:08,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:21:08,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:08,766 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) [2023-09-01 08:21:08,788 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 [2023-09-01 08:21:08,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:21:08,809 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:21:08,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:21:08,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:21:08,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:21:08,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:21:08,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:21:08,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:21:08,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:21:08,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:21:08,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:21:08,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:21:08,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:21:08,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:21:08,813 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:21:08,936 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:21:08,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:21:09,182 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:21:09,274 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:21:09,275 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 08:21:09,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:21:09 BoogieIcfgContainer [2023-09-01 08:21:09,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:21:09,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:21:09,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:21:09,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:21:09,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:21:08" (1/3) ... [2023-09-01 08:21:09,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464e4741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:21:09, skipping insertion in model container [2023-09-01 08:21:09,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:08" (2/3) ... [2023-09-01 08:21:09,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464e4741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:21:09, skipping insertion in model container [2023-09-01 08:21:09,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:21:09" (3/3) ... [2023-09-01 08:21:09,284 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-09-01 08:21:09,291 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:21:09,299 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:21:09,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 08:21:09,300 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:21:09,350 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 08:21:09,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 93 transitions, 202 flow [2023-09-01 08:21:09,413 INFO L130 PetriNetUnfolder]: 6/91 cut-off events. [2023-09-01 08:21:09,413 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:21:09,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 91 events. 6/91 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-09-01 08:21:09,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 93 transitions, 202 flow [2023-09-01 08:21:09,421 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 76 transitions, 164 flow [2023-09-01 08:21:09,423 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:21:09,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 76 transitions, 164 flow [2023-09-01 08:21:09,435 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 76 transitions, 164 flow [2023-09-01 08:21:09,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 76 transitions, 164 flow [2023-09-01 08:21:09,461 INFO L130 PetriNetUnfolder]: 5/76 cut-off events. [2023-09-01 08:21:09,462 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:21:09,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 5/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 83 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-09-01 08:21:09,463 INFO L119 LiptonReduction]: Number of co-enabled transitions 772 [2023-09-01 08:21:11,781 INFO L134 LiptonReduction]: Checked pairs total: 942 [2023-09-01 08:21:11,782 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-09-01 08:21:11,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:21:11,798 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;@28c30c30, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:21:11,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-09-01 08:21:11,800 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-09-01 08:21:11,801 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:21:11,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:11,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:21:11,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:11,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 11779495, now seen corresponding path program 1 times [2023-09-01 08:21:11,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:11,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152094633] [2023-09-01 08:21:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:11,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:12,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:12,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152094633] [2023-09-01 08:21:12,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152094633] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:12,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:12,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:21:12,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334924581] [2023-09-01 08:21:12,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:12,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:12,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:12,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:12,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:21:12,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-09-01 08:21:12,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:12,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-09-01 08:21:12,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:12,141 INFO L130 PetriNetUnfolder]: 210/310 cut-off events. [2023-09-01 08:21:12,141 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 08:21:12,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 310 events. 210/310 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1147 event pairs, 94 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 552. Up to 304 conditions per place. [2023-09-01 08:21:12,146 INFO L137 encePairwiseOnDemand]: 158/161 looper letters, 19 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-09-01 08:21:12,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 96 flow [2023-09-01 08:21:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-09-01 08:21:12,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113871635610766 [2023-09-01 08:21:12,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-09-01 08:21:12,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-09-01 08:21:12,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:12,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-09-01 08:21:12,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,176 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 247 transitions. [2023-09-01 08:21:12,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 96 flow [2023-09-01 08:21:12,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 08:21:12,180 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 50 flow [2023-09-01 08:21:12,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-09-01 08:21:12,185 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-09-01 08:21:12,185 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 50 flow [2023-09-01 08:21:12,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:12,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:21:12,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:21:12,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:12,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:12,187 INFO L85 PathProgramCache]: Analyzing trace with hash 11779541, now seen corresponding path program 1 times [2023-09-01 08:21:12,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:12,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147285030] [2023-09-01 08:21:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:12,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:12,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:12,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147285030] [2023-09-01 08:21:12,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147285030] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:12,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:12,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:21:12,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883449808] [2023-09-01 08:21:12,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:12,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:12,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:12,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:21:12,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-09-01 08:21:12,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:12,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-09-01 08:21:12,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:12,409 INFO L130 PetriNetUnfolder]: 277/434 cut-off events. [2023-09-01 08:21:12,410 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:21:12,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 434 events. 277/434 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 1932 event pairs, 100 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 874. Up to 273 conditions per place. [2023-09-01 08:21:12,416 INFO L137 encePairwiseOnDemand]: 157/161 looper letters, 35 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-09-01 08:21:12,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 38 transitions, 159 flow [2023-09-01 08:21:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-09-01 08:21:12,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2023-09-01 08:21:12,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-09-01 08:21:12,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-09-01 08:21:12,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:12,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-09-01 08:21:12,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,429 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 50 flow. Second operand 3 states and 261 transitions. [2023-09-01 08:21:12,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 38 transitions, 159 flow [2023-09-01 08:21:12,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:12,432 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 63 flow [2023-09-01 08:21:12,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-09-01 08:21:12,433 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-09-01 08:21:12,433 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 63 flow [2023-09-01 08:21:12,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:12,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:21:12,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 08:21:12,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:12,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash 11779496, now seen corresponding path program 1 times [2023-09-01 08:21:12,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:12,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213332983] [2023-09-01 08:21:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:12,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:12,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:12,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213332983] [2023-09-01 08:21:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213332983] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:12,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:21:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645049179] [2023-09-01 08:21:12,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:12,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:12,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:21:12,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-09-01 08:21:12,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:12,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-09-01 08:21:12,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:12,561 INFO L130 PetriNetUnfolder]: 189/301 cut-off events. [2023-09-01 08:21:12,562 INFO L131 PetriNetUnfolder]: For 17/22 co-relation queries the response was YES. [2023-09-01 08:21:12,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 301 events. 189/301 cut-off events. For 17/22 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1075 event pairs, 46 based on Foata normal form. 5/154 useless extension candidates. Maximal degree in co-relation 662. Up to 253 conditions per place. [2023-09-01 08:21:12,565 INFO L137 encePairwiseOnDemand]: 155/161 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-09-01 08:21:12,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 152 flow [2023-09-01 08:21:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-09-01 08:21:12,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2023-09-01 08:21:12,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-09-01 08:21:12,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-09-01 08:21:12,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:12,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-09-01 08:21:12,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,572 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 63 flow. Second operand 3 states and 261 transitions. [2023-09-01 08:21:12,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 152 flow [2023-09-01 08:21:12,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:12,574 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 75 flow [2023-09-01 08:21:12,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-09-01 08:21:12,575 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-09-01 08:21:12,579 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 75 flow [2023-09-01 08:21:12,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:12,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:21:12,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 08:21:12,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:12,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash 365166042, now seen corresponding path program 1 times [2023-09-01 08:21:12,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:12,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065688458] [2023-09-01 08:21:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:12,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:12,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065688458] [2023-09-01 08:21:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065688458] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917723538] [2023-09-01 08:21:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:12,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:12,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:12,689 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) [2023-09-01 08:21:12,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 08:21:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:21:12,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:12,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:12,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917723538] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:12,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:12,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:21:12,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433011459] [2023-09-01 08:21:12,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:12,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:21:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:12,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:21:12,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:21:12,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-09-01 08:21:12,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 75 flow. Second operand has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:12,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:12,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-09-01 08:21:12,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:13,056 INFO L130 PetriNetUnfolder]: 535/865 cut-off events. [2023-09-01 08:21:13,056 INFO L131 PetriNetUnfolder]: For 114/119 co-relation queries the response was YES. [2023-09-01 08:21:13,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 865 events. 535/865 cut-off events. For 114/119 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4047 event pairs, 35 based on Foata normal form. 59/596 useless extension candidates. Maximal degree in co-relation 2137. Up to 282 conditions per place. [2023-09-01 08:21:13,062 INFO L137 encePairwiseOnDemand]: 152/161 looper letters, 72 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2023-09-01 08:21:13,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 97 transitions, 469 flow [2023-09-01 08:21:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:21:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:21:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 630 transitions. [2023-09-01 08:21:13,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590062111801242 [2023-09-01 08:21:13,065 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 630 transitions. [2023-09-01 08:21:13,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 630 transitions. [2023-09-01 08:21:13,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:13,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 630 transitions. [2023-09-01 08:21:13,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.0) internal successors, (630), 7 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) [2023-09-01 08:21:13,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:13,070 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:13,070 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 75 flow. Second operand 7 states and 630 transitions. [2023-09-01 08:21:13,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 97 transitions, 469 flow [2023-09-01 08:21:13,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 97 transitions, 465 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:21:13,073 INFO L231 Difference]: Finished difference. Result has 38 places, 44 transitions, 279 flow [2023-09-01 08:21:13,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=38, PETRI_TRANSITIONS=44} [2023-09-01 08:21:13,074 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2023-09-01 08:21:13,074 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 44 transitions, 279 flow [2023-09-01 08:21:13,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:13,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:13,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:21:13,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:13,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:13,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:13,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:13,280 INFO L85 PathProgramCache]: Analyzing trace with hash 365166087, now seen corresponding path program 1 times [2023-09-01 08:21:13,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:13,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969328172] [2023-09-01 08:21:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:13,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:13,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969328172] [2023-09-01 08:21:13,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969328172] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125263988] [2023-09-01 08:21:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:13,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:13,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:13,356 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) [2023-09-01 08:21:13,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 08:21:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:13,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:21:13,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:13,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:21:13,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125263988] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:13,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:21:13,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-09-01 08:21:13,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971617168] [2023-09-01 08:21:13,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:13,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:21:13,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:13,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:21:13,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 08:21:13,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-09-01 08:21:13,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 44 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:13,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:13,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-09-01 08:21:13,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:13,543 INFO L130 PetriNetUnfolder]: 453/736 cut-off events. [2023-09-01 08:21:13,543 INFO L131 PetriNetUnfolder]: For 899/899 co-relation queries the response was YES. [2023-09-01 08:21:13,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2688 conditions, 736 events. 453/736 cut-off events. For 899/899 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3245 event pairs, 61 based on Foata normal form. 0/606 useless extension candidates. Maximal degree in co-relation 2674. Up to 665 conditions per place. [2023-09-01 08:21:13,549 INFO L137 encePairwiseOnDemand]: 158/161 looper letters, 51 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-09-01 08:21:13,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 384 flow [2023-09-01 08:21:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:21:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:21:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 334 transitions. [2023-09-01 08:21:13,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186335403726708 [2023-09-01 08:21:13,551 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 334 transitions. [2023-09-01 08:21:13,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 334 transitions. [2023-09-01 08:21:13,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:13,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 334 transitions. [2023-09-01 08:21:13,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:13,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:13,554 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:13,554 INFO L175 Difference]: Start difference. First operand has 38 places, 44 transitions, 279 flow. Second operand 4 states and 334 transitions. [2023-09-01 08:21:13,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 384 flow [2023-09-01 08:21:13,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 356 flow, removed 14 selfloop flow, removed 0 redundant places. [2023-09-01 08:21:13,560 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 210 flow [2023-09-01 08:21:13,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-09-01 08:21:13,561 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2023-09-01 08:21:13,561 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 210 flow [2023-09-01 08:21:13,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:13,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:13,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:21:13,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:13,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:13,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:13,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash 365166085, now seen corresponding path program 1 times [2023-09-01 08:21:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:13,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679915483] [2023-09-01 08:21:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:13,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:13,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:13,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679915483] [2023-09-01 08:21:13,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679915483] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950017503] [2023-09-01 08:21:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:13,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:13,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:13,828 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) [2023-09-01 08:21:13,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 08:21:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:13,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:21:13,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:13,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:13,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950017503] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:13,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:13,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 08:21:13,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092131705] [2023-09-01 08:21:13,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:13,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:21:13,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:13,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:21:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:21:13,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-09-01 08:21:13,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 75.42857142857143) internal successors, (528), 7 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:13,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:13,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-09-01 08:21:13,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:14,146 INFO L130 PetriNetUnfolder]: 666/1172 cut-off events. [2023-09-01 08:21:14,147 INFO L131 PetriNetUnfolder]: For 1134/1134 co-relation queries the response was YES. [2023-09-01 08:21:14,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3774 conditions, 1172 events. 666/1172 cut-off events. For 1134/1134 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5985 event pairs, 221 based on Foata normal form. 0/995 useless extension candidates. Maximal degree in co-relation 3759. Up to 542 conditions per place. [2023-09-01 08:21:14,155 INFO L137 encePairwiseOnDemand]: 158/161 looper letters, 95 selfloop transitions, 14 changer transitions 0/110 dead transitions. [2023-09-01 08:21:14,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 110 transitions, 733 flow [2023-09-01 08:21:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:21:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:21:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 521 transitions. [2023-09-01 08:21:14,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393374741200828 [2023-09-01 08:21:14,171 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 521 transitions. [2023-09-01 08:21:14,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 521 transitions. [2023-09-01 08:21:14,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:14,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 521 transitions. [2023-09-01 08:21:14,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:14,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 161.0) internal successors, (1127), 7 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:14,175 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 161.0) internal successors, (1127), 7 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:14,175 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 210 flow. Second operand 6 states and 521 transitions. [2023-09-01 08:21:14,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 110 transitions, 733 flow [2023-09-01 08:21:14,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 110 transitions, 730 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:21:14,180 INFO L231 Difference]: Finished difference. Result has 46 places, 50 transitions, 366 flow [2023-09-01 08:21:14,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=46, PETRI_TRANSITIONS=50} [2023-09-01 08:21:14,181 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-09-01 08:21:14,181 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 50 transitions, 366 flow [2023-09-01 08:21:14,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.42857142857143) internal successors, (528), 7 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:14,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:14,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:14,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:14,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:14,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:14,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:14,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1868180880, now seen corresponding path program 1 times [2023-09-01 08:21:14,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:14,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865014571] [2023-09-01 08:21:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:14,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:14,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:14,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865014571] [2023-09-01 08:21:14,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865014571] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:14,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350416164] [2023-09-01 08:21:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:14,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:14,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:14,505 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) [2023-09-01 08:21:14,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 08:21:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 08:21:14,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:14,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:14,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350416164] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:14,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:21:14,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2023-09-01 08:21:14,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416702602] [2023-09-01 08:21:14,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:14,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:21:14,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:14,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:21:14,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:21:14,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-09-01 08:21:14,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 50 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:14,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:14,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-09-01 08:21:14,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:14,856 INFO L130 PetriNetUnfolder]: 464/875 cut-off events. [2023-09-01 08:21:14,856 INFO L131 PetriNetUnfolder]: For 1075/1087 co-relation queries the response was YES. [2023-09-01 08:21:14,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 875 events. 464/875 cut-off events. For 1075/1087 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4321 event pairs, 112 based on Foata normal form. 12/838 useless extension candidates. Maximal degree in co-relation 2800. Up to 777 conditions per place. [2023-09-01 08:21:14,862 INFO L137 encePairwiseOnDemand]: 157/161 looper letters, 57 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-09-01 08:21:14,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 547 flow [2023-09-01 08:21:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:21:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:21:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2023-09-01 08:21:14,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077639751552795 [2023-09-01 08:21:14,865 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 327 transitions. [2023-09-01 08:21:14,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 327 transitions. [2023-09-01 08:21:14,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:14,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 327 transitions. [2023-09-01 08:21:14,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:14,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:14,867 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:14,868 INFO L175 Difference]: Start difference. First operand has 46 places, 50 transitions, 366 flow. Second operand 4 states and 327 transitions. [2023-09-01 08:21:14,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 547 flow [2023-09-01 08:21:14,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 538 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:14,873 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 373 flow [2023-09-01 08:21:14,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=373, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2023-09-01 08:21:14,874 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-09-01 08:21:14,874 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 373 flow [2023-09-01 08:21:14,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:14,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:14,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:14,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:15,079 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 [2023-09-01 08:21:15,080 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:15,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:15,080 INFO L85 PathProgramCache]: Analyzing trace with hash -489069722, now seen corresponding path program 1 times [2023-09-01 08:21:15,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:15,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831948429] [2023-09-01 08:21:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:15,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:15,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:15,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831948429] [2023-09-01 08:21:15,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831948429] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:15,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:15,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:21:15,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661478412] [2023-09-01 08:21:15,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:15,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:15,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:15,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:21:15,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-09-01 08:21:15,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 373 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:15,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-09-01 08:21:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:15,245 INFO L130 PetriNetUnfolder]: 570/1074 cut-off events. [2023-09-01 08:21:15,245 INFO L131 PetriNetUnfolder]: For 1666/1686 co-relation queries the response was YES. [2023-09-01 08:21:15,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3556 conditions, 1074 events. 570/1074 cut-off events. For 1666/1686 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5724 event pairs, 310 based on Foata normal form. 42/1056 useless extension candidates. Maximal degree in co-relation 3536. Up to 873 conditions per place. [2023-09-01 08:21:15,254 INFO L137 encePairwiseOnDemand]: 158/161 looper letters, 63 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-09-01 08:21:15,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 621 flow [2023-09-01 08:21:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-09-01 08:21:15,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2023-09-01 08:21:15,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-09-01 08:21:15,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-09-01 08:21:15,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:15,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-09-01 08:21:15,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,258 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 373 flow. Second operand 3 states and 258 transitions. [2023-09-01 08:21:15,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 621 flow [2023-09-01 08:21:15,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 69 transitions, 619 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 08:21:15,264 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 416 flow [2023-09-01 08:21:15,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-09-01 08:21:15,265 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-09-01 08:21:15,266 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 416 flow [2023-09-01 08:21:15,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:15,266 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 08:21:15,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 08:21:15,267 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:15,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash -488949165, now seen corresponding path program 2 times [2023-09-01 08:21:15,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:15,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650119089] [2023-09-01 08:21:15,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:15,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:15,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650119089] [2023-09-01 08:21:15,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650119089] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:15,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051990564] [2023-09-01 08:21:15,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:21:15,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:15,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:15,328 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) [2023-09-01 08:21:15,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 08:21:15,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:21:15,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:15,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:21:15,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:21:15,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:21:15,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051990564] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:15,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:21:15,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-09-01 08:21:15,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193602515] [2023-09-01 08:21:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:15,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:15,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:21:15,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-09-01 08:21:15,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:15,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-09-01 08:21:15,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:15,536 INFO L130 PetriNetUnfolder]: 469/904 cut-off events. [2023-09-01 08:21:15,536 INFO L131 PetriNetUnfolder]: For 1710/1768 co-relation queries the response was YES. [2023-09-01 08:21:15,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3142 conditions, 904 events. 469/904 cut-off events. For 1710/1768 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4870 event pairs, 334 based on Foata normal form. 76/944 useless extension candidates. Maximal degree in co-relation 3120. Up to 897 conditions per place. [2023-09-01 08:21:15,543 INFO L137 encePairwiseOnDemand]: 159/161 looper letters, 43 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-09-01 08:21:15,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 445 flow [2023-09-01 08:21:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-09-01 08:21:15,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968944099378882 [2023-09-01 08:21:15,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-09-01 08:21:15,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-09-01 08:21:15,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:15,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-09-01 08:21:15,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,548 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 416 flow. Second operand 3 states and 240 transitions. [2023-09-01 08:21:15,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 445 flow [2023-09-01 08:21:15,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 425 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 08:21:15,554 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 339 flow [2023-09-01 08:21:15,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-09-01 08:21:15,555 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-09-01 08:21:15,556 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 339 flow [2023-09-01 08:21:15,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:15,556 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 08:21:15,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:15,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:15,761 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:15,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:15,761 INFO L85 PathProgramCache]: Analyzing trace with hash -488949208, now seen corresponding path program 2 times [2023-09-01 08:21:15,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:15,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563559734] [2023-09-01 08:21:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:15,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:15,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:15,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563559734] [2023-09-01 08:21:15,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563559734] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:15,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538973051] [2023-09-01 08:21:15,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:21:15,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:15,827 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) [2023-09-01 08:21:15,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 08:21:15,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:21:15,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:15,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 08:21:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:15,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:15,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538973051] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:15,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:15,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 08:21:15,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005545470] [2023-09-01 08:21:15,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:15,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 08:21:15,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 08:21:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:21:15,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-09-01 08:21:15,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 339 flow. Second operand has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 12 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:15,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:15,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-09-01 08:21:15,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:16,335 INFO L130 PetriNetUnfolder]: 1041/1997 cut-off events. [2023-09-01 08:21:16,336 INFO L131 PetriNetUnfolder]: For 7431/7557 co-relation queries the response was YES. [2023-09-01 08:21:16,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6450 conditions, 1997 events. 1041/1997 cut-off events. For 7431/7557 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12389 event pairs, 145 based on Foata normal form. 354/2267 useless extension candidates. Maximal degree in co-relation 6430. Up to 459 conditions per place. [2023-09-01 08:21:16,349 INFO L137 encePairwiseOnDemand]: 155/161 looper letters, 124 selfloop transitions, 71 changer transitions 0/198 dead transitions. [2023-09-01 08:21:16,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 198 transitions, 1385 flow [2023-09-01 08:21:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 08:21:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 08:21:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1067 transitions. [2023-09-01 08:21:16,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522774327122153 [2023-09-01 08:21:16,354 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1067 transitions. [2023-09-01 08:21:16,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1067 transitions. [2023-09-01 08:21:16,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:16,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1067 transitions. [2023-09-01 08:21:16,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 88.91666666666667) internal successors, (1067), 12 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:16,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 161.0) internal successors, (2093), 13 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:16,361 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 161.0) internal successors, (2093), 13 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:16,361 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 339 flow. Second operand 12 states and 1067 transitions. [2023-09-01 08:21:16,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 198 transitions, 1385 flow [2023-09-01 08:21:16,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 198 transitions, 1384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:16,371 INFO L231 Difference]: Finished difference. Result has 69 places, 98 transitions, 1096 flow [2023-09-01 08:21:16,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1096, PETRI_PLACES=69, PETRI_TRANSITIONS=98} [2023-09-01 08:21:16,372 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2023-09-01 08:21:16,373 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 98 transitions, 1096 flow [2023-09-01 08:21:16,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 12 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:16,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:16,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:16,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:16,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:16,580 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:16,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:16,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1906590139, now seen corresponding path program 1 times [2023-09-01 08:21:16,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:16,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114141233] [2023-09-01 08:21:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:16,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:16,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:16,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114141233] [2023-09-01 08:21:16,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114141233] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:16,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194633375] [2023-09-01 08:21:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:16,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:16,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:16,658 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) [2023-09-01 08:21:16,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 08:21:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:16,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:21:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:21:16,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:21:16,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194633375] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:16,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:21:16,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 08:21:16,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343270555] [2023-09-01 08:21:16,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:16,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:16,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:16,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:21:16,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 161 [2023-09-01 08:21:16,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 98 transitions, 1096 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:16,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:16,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 161 [2023-09-01 08:21:16,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:16,954 INFO L130 PetriNetUnfolder]: 820/1589 cut-off events. [2023-09-01 08:21:16,954 INFO L131 PetriNetUnfolder]: For 7347/7469 co-relation queries the response was YES. [2023-09-01 08:21:16,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5989 conditions, 1589 events. 820/1589 cut-off events. For 7347/7469 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9714 event pairs, 561 based on Foata normal form. 244/1783 useless extension candidates. Maximal degree in co-relation 5958. Up to 1582 conditions per place. [2023-09-01 08:21:16,967 INFO L137 encePairwiseOnDemand]: 159/161 looper letters, 76 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-09-01 08:21:16,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 996 flow [2023-09-01 08:21:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-09-01 08:21:16,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494824016563147 [2023-09-01 08:21:16,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-09-01 08:21:16,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-09-01 08:21:16,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:16,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-09-01 08:21:16,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:16,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:16,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:16,971 INFO L175 Difference]: Start difference. First operand has 69 places, 98 transitions, 1096 flow. Second operand 3 states and 239 transitions. [2023-09-01 08:21:16,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 996 flow [2023-09-01 08:21:16,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 902 flow, removed 42 selfloop flow, removed 3 redundant places. [2023-09-01 08:21:16,988 INFO L231 Difference]: Finished difference. Result has 67 places, 80 transitions, 750 flow [2023-09-01 08:21:16,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=750, PETRI_PLACES=67, PETRI_TRANSITIONS=80} [2023-09-01 08:21:16,989 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-09-01 08:21:16,989 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 80 transitions, 750 flow [2023-09-01 08:21:16,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:16,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:16,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:16,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 08:21:17,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:17,195 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:17,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash 672379774, now seen corresponding path program 1 times [2023-09-01 08:21:17,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:17,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141882102] [2023-09-01 08:21:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:17,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:17,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:17,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141882102] [2023-09-01 08:21:17,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141882102] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:17,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:17,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:21:17,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163005392] [2023-09-01 08:21:17,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:17,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:17,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:17,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:17,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:21:17,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 161 [2023-09-01 08:21:17,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 750 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:17,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:17,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 161 [2023-09-01 08:21:17,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:17,470 INFO L130 PetriNetUnfolder]: 820/1543 cut-off events. [2023-09-01 08:21:17,470 INFO L131 PetriNetUnfolder]: For 4346/4408 co-relation queries the response was YES. [2023-09-01 08:21:17,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5452 conditions, 1543 events. 820/1543 cut-off events. For 4346/4408 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9105 event pairs, 561 based on Foata normal form. 62/1601 useless extension candidates. Maximal degree in co-relation 5422. Up to 1536 conditions per place. [2023-09-01 08:21:17,483 INFO L137 encePairwiseOnDemand]: 159/161 looper letters, 75 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-09-01 08:21:17,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 900 flow [2023-09-01 08:21:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-09-01 08:21:17,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474120082815735 [2023-09-01 08:21:17,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-09-01 08:21:17,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-09-01 08:21:17,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:17,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-09-01 08:21:17,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:17,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:17,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:17,488 INFO L175 Difference]: Start difference. First operand has 67 places, 80 transitions, 750 flow. Second operand 3 states and 229 transitions. [2023-09-01 08:21:17,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 900 flow [2023-09-01 08:21:17,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 899 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:17,500 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 749 flow [2023-09-01 08:21:17,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=749, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-09-01 08:21:17,501 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-09-01 08:21:17,501 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 749 flow [2023-09-01 08:21:17,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:17,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:17,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:17,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 08:21:17,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:17,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:17,503 INFO L85 PathProgramCache]: Analyzing trace with hash 672379792, now seen corresponding path program 1 times [2023-09-01 08:21:17,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:17,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634286319] [2023-09-01 08:21:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:17,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:17,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:17,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634286319] [2023-09-01 08:21:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634286319] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:17,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:17,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:21:17,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100325668] [2023-09-01 08:21:17,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:17,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:17,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:17,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:21:17,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 161 [2023-09-01 08:21:17,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 749 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:17,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:17,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 161 [2023-09-01 08:21:17,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:17,775 INFO L130 PetriNetUnfolder]: 820/1497 cut-off events. [2023-09-01 08:21:17,775 INFO L131 PetriNetUnfolder]: For 4346/4408 co-relation queries the response was YES. [2023-09-01 08:21:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5361 conditions, 1497 events. 820/1497 cut-off events. For 4346/4408 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8569 event pairs, 561 based on Foata normal form. 108/1601 useless extension candidates. Maximal degree in co-relation 5330. Up to 1490 conditions per place. [2023-09-01 08:21:17,792 INFO L137 encePairwiseOnDemand]: 159/161 looper letters, 73 selfloop transitions, 1 changer transitions 1/78 dead transitions. [2023-09-01 08:21:17,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 897 flow [2023-09-01 08:21:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-09-01 08:21:17,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658385093167702 [2023-09-01 08:21:17,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-09-01 08:21:17,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-09-01 08:21:17,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:17,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-09-01 08:21:17,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:17,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:17,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:17,796 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 749 flow. Second operand 3 states and 225 transitions. [2023-09-01 08:21:17,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 897 flow [2023-09-01 08:21:17,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:17,810 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 745 flow [2023-09-01 08:21:17,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=745, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2023-09-01 08:21:17,811 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-09-01 08:21:17,811 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 745 flow [2023-09-01 08:21:17,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:17,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:17,812 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-09-01 08:21:17,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 08:21:17,812 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:17,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:17,813 INFO L85 PathProgramCache]: Analyzing trace with hash -106021656, now seen corresponding path program 3 times [2023-09-01 08:21:17,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:17,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960777340] [2023-09-01 08:21:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:17,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:17,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:17,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960777340] [2023-09-01 08:21:17,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960777340] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:17,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179808709] [2023-09-01 08:21:17,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:21:17,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:17,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:18,000 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) [2023-09-01 08:21:18,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:21:18,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 08:21:18,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:18,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:21:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:18,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:18,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179808709] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:18,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:18,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-09-01 08:21:18,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350780968] [2023-09-01 08:21:18,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:18,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 08:21:18,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 08:21:18,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-09-01 08:21:18,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-09-01 08:21:18,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 745 flow. Second operand has 24 states, 24 states have (on average 76.08333333333333) internal successors, (1826), 24 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:18,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:18,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-09-01 08:21:18,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:18,969 INFO L130 PetriNetUnfolder]: 1812/3198 cut-off events. [2023-09-01 08:21:18,969 INFO L131 PetriNetUnfolder]: For 45026/45162 co-relation queries the response was YES. [2023-09-01 08:21:18,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10406 conditions, 3198 events. 1812/3198 cut-off events. For 45026/45162 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 17588 event pairs, 177 based on Foata normal form. 524/3720 useless extension candidates. Maximal degree in co-relation 10374. Up to 639 conditions per place. [2023-09-01 08:21:18,988 INFO L137 encePairwiseOnDemand]: 156/161 looper letters, 109 selfloop transitions, 159 changer transitions 66/337 dead transitions. [2023-09-01 08:21:18,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 337 transitions, 2572 flow [2023-09-01 08:21:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:21:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:21:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2055 transitions. [2023-09-01 08:21:18,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531832298136646 [2023-09-01 08:21:18,995 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2055 transitions. [2023-09-01 08:21:18,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2055 transitions. [2023-09-01 08:21:18,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:18,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2055 transitions. [2023-09-01 08:21:19,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.625) internal successors, (2055), 24 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:19,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 161.0) internal successors, (4025), 25 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:19,008 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 161.0) internal successors, (4025), 25 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:19,008 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 745 flow. Second operand 24 states and 2055 transitions. [2023-09-01 08:21:19,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 337 transitions, 2572 flow [2023-09-01 08:21:19,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 337 transitions, 2571 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:19,026 INFO L231 Difference]: Finished difference. Result has 110 places, 183 transitions, 2267 flow [2023-09-01 08:21:19,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2267, PETRI_PLACES=110, PETRI_TRANSITIONS=183} [2023-09-01 08:21:19,026 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 81 predicate places. [2023-09-01 08:21:19,026 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 183 transitions, 2267 flow [2023-09-01 08:21:19,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 76.08333333333333) internal successors, (1826), 24 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:19,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:19,027 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-09-01 08:21:19,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:19,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 08:21:19,233 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:19,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:19,234 INFO L85 PathProgramCache]: Analyzing trace with hash 973673064, now seen corresponding path program 4 times [2023-09-01 08:21:19,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:19,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979884943] [2023-09-01 08:21:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:19,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:19,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:19,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979884943] [2023-09-01 08:21:19,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979884943] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:19,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17808027] [2023-09-01 08:21:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:21:19,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:19,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:19,729 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) [2023-09-01 08:21:19,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 08:21:19,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:21:19,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:21:19,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:19,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:20,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17808027] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:20,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:20,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2023-09-01 08:21:20,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561228525] [2023-09-01 08:21:20,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:20,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-09-01 08:21:20,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-09-01 08:21:20,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-09-01 08:21:20,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-09-01 08:21:20,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 183 transitions, 2267 flow. Second operand has 48 states, 48 states have (on average 76.04166666666667) internal successors, (3650), 48 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:20,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:20,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-09-01 08:21:20,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:22,768 INFO L130 PetriNetUnfolder]: 4964/8738 cut-off events. [2023-09-01 08:21:22,768 INFO L131 PetriNetUnfolder]: For 527112/527392 co-relation queries the response was YES. [2023-09-01 08:21:22,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32801 conditions, 8738 events. 4964/8738 cut-off events. For 527112/527392 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 51430 event pairs, 277 based on Foata normal form. 1076/9812 useless extension candidates. Maximal degree in co-relation 32746. Up to 2383 conditions per place. [2023-09-01 08:21:22,841 INFO L137 encePairwiseOnDemand]: 156/161 looper letters, 207 selfloop transitions, 515 changer transitions 138/863 dead transitions. [2023-09-01 08:21:22,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 863 transitions, 8560 flow [2023-09-01 08:21:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 08:21:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 08:21:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4119 transitions. [2023-09-01 08:21:22,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5329968944099379 [2023-09-01 08:21:22,851 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4119 transitions. [2023-09-01 08:21:22,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4119 transitions. [2023-09-01 08:21:22,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:22,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4119 transitions. [2023-09-01 08:21:22,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 85.8125) internal successors, (4119), 48 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:22,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 161.0) internal successors, (7889), 49 states have internal predecessors, (7889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:22,876 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 161.0) internal successors, (7889), 49 states have internal predecessors, (7889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:22,876 INFO L175 Difference]: Start difference. First operand has 110 places, 183 transitions, 2267 flow. Second operand 48 states and 4119 transitions. [2023-09-01 08:21:22,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 863 transitions, 8560 flow [2023-09-01 08:21:23,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 863 transitions, 7062 flow, removed 711 selfloop flow, removed 4 redundant places. [2023-09-01 08:21:23,016 INFO L231 Difference]: Finished difference. Result has 199 places, 541 transitions, 6818 flow [2023-09-01 08:21:23,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=1969, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6818, PETRI_PLACES=199, PETRI_TRANSITIONS=541} [2023-09-01 08:21:23,017 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 170 predicate places. [2023-09-01 08:21:23,017 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 541 transitions, 6818 flow [2023-09-01 08:21:23,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 76.04166666666667) internal successors, (3650), 48 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:23,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:23,018 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-09-01 08:21:23,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:23,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 08:21:23,224 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:23,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1545470616, now seen corresponding path program 5 times [2023-09-01 08:21:23,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:23,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929233687] [2023-09-01 08:21:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:23,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:24,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:24,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929233687] [2023-09-01 08:21:24,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929233687] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:24,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251073276] [2023-09-01 08:21:24,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:21:24,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:24,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:24,823 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) [2023-09-01 08:21:24,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 08:21:24,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-09-01 08:21:24,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:24,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 08:21:24,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:25,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:27,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251073276] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:27,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:27,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2023-09-01 08:21:27,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799477897] [2023-09-01 08:21:27,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:27,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-09-01 08:21:27,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:27,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-09-01 08:21:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2023-09-01 08:21:27,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-09-01 08:21:27,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 541 transitions, 6818 flow. Second operand has 96 states, 96 states have (on average 76.02083333333333) internal successors, (7298), 96 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:27,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:27,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-09-01 08:21:27,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:37,286 INFO L130 PetriNetUnfolder]: 15892/27910 cut-off events. [2023-09-01 08:21:37,286 INFO L131 PetriNetUnfolder]: For 4717006/4717574 co-relation queries the response was YES. [2023-09-01 08:21:37,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105065 conditions, 27910 events. 15892/27910 cut-off events. For 4717006/4717574 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 181870 event pairs, 473 based on Foata normal form. 2180/30088 useless extension candidates. Maximal degree in co-relation 104966. Up to 7639 conditions per place. [2023-09-01 08:21:37,664 INFO L137 encePairwiseOnDemand]: 156/161 looper letters, 401 selfloop transitions, 1807 changer transitions 282/2493 dead transitions. [2023-09-01 08:21:37,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 2493 transitions, 27327 flow [2023-09-01 08:21:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-09-01 08:21:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-09-01 08:21:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 8247 transitions. [2023-09-01 08:21:37,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335791925465838 [2023-09-01 08:21:37,679 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 8247 transitions. [2023-09-01 08:21:37,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 8247 transitions. [2023-09-01 08:21:37,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:37,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 8247 transitions. [2023-09-01 08:21:37,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 85.90625) internal successors, (8247), 96 states have internal predecessors, (8247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:37,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 161.0) internal successors, (15617), 97 states have internal predecessors, (15617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:37,735 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 161.0) internal successors, (15617), 97 states have internal predecessors, (15617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:37,736 INFO L175 Difference]: Start difference. First operand has 199 places, 541 transitions, 6818 flow. Second operand 96 states and 8247 transitions. [2023-09-01 08:21:37,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 2493 transitions, 27327 flow [2023-09-01 08:21:38,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 2493 transitions, 21912 flow, removed 2583 selfloop flow, removed 10 redundant places. [2023-09-01 08:21:38,692 INFO L231 Difference]: Finished difference. Result has 378 places, 1835 transitions, 22952 flow [2023-09-01 08:21:38,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=6107, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=520, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=22952, PETRI_PLACES=378, PETRI_TRANSITIONS=1835} [2023-09-01 08:21:38,694 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 349 predicate places. [2023-09-01 08:21:38,694 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1835 transitions, 22952 flow [2023-09-01 08:21:38,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 76.02083333333333) internal successors, (7298), 96 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:38,696 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-09-01 08:21:38,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 08:21:38,902 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:21:38,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash 111203176, now seen corresponding path program 6 times [2023-09-01 08:21:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:38,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981537060] [2023-09-01 08:21:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:43,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:43,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981537060] [2023-09-01 08:21:43,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981537060] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:43,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613952301] [2023-09-01 08:21:43,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:21:43,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:43,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:43,909 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) [2023-09-01 08:21:43,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:21:44,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-09-01 08:21:44,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:44,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 08:21:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:44,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:52,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613952301] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:52,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:52,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 190 [2023-09-01 08:21:52,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775541109] [2023-09-01 08:21:52,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:52,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2023-09-01 08:21:52,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:52,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2023-09-01 08:21:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2023-09-01 08:21:53,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-09-01 08:21:53,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1835 transitions, 22952 flow. Second operand has 192 states, 192 states have (on average 76.01041666666667) internal successors, (14594), 192 states have internal predecessors, (14594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:53,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:53,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-09-01 08:21:53,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:16,526 INFO L130 PetriNetUnfolder]: 56196/98538 cut-off events. [2023-09-01 08:23:16,526 INFO L131 PetriNetUnfolder]: For 39992340/39993484 co-relation queries the response was YES. [2023-09-01 08:23:21,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370585 conditions, 98538 events. 56196/98538 cut-off events. For 39992340/39993484 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 717301 event pairs, 861 based on Foata normal form. 4388/102924 useless extension candidates. Maximal degree in co-relation 370400. Up to 26791 conditions per place. [2023-09-01 08:23:21,601 INFO L137 encePairwiseOnDemand]: 156/161 looper letters, 787 selfloop transitions, 6699 changer transitions 570/8059 dead transitions. [2023-09-01 08:23:21,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 8059 transitions, 95513 flow [2023-09-01 08:23:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-09-01 08:23:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2023-09-01 08:23:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 16503 transitions. [2023-09-01 08:23:21,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338703416149069 [2023-09-01 08:23:21,631 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 16503 transitions. [2023-09-01 08:23:21,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 16503 transitions. [2023-09-01 08:23:21,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:21,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 16503 transitions. [2023-09-01 08:23:21,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 85.953125) internal successors, (16503), 192 states have internal predecessors, (16503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:21,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 161.0) internal successors, (31073), 193 states have internal predecessors, (31073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:21,718 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 161.0) internal successors, (31073), 193 states have internal predecessors, (31073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:21,718 INFO L175 Difference]: Start difference. First operand has 378 places, 1835 transitions, 22952 flow. Second operand 192 states and 16503 transitions. [2023-09-01 08:23:21,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 8059 transitions, 95513 flow [2023-09-01 08:23:31,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 8059 transitions, 75058 flow, removed 9783 selfloop flow, removed 22 redundant places. [2023-09-01 08:23:31,947 INFO L231 Difference]: Finished difference. Result has 737 places, 6729 transitions, 83286 flow [2023-09-01 08:23:31,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=21121, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=83286, PETRI_PLACES=737, PETRI_TRANSITIONS=6729} [2023-09-01 08:23:31,949 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 708 predicate places. [2023-09-01 08:23:31,949 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 6729 transitions, 83286 flow [2023-09-01 08:23:31,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 76.01041666666667) internal successors, (14594), 192 states have internal predecessors, (14594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:31,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:31,952 INFO L208 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2023-09-01 08:23:31,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 08:23:32,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 08:23:32,159 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-09-01 08:23:32,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -598573208, now seen corresponding path program 7 times [2023-09-01 08:23:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:32,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397314460] [2023-09-01 08:23:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:48,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:48,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397314460] [2023-09-01 08:23:48,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397314460] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:48,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398919458] [2023-09-01 08:23:48,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:23:48,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:48,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:48,506 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) [2023-09-01 08:23:48,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 08:23:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:48,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 193 conjunts are in the unsatisfiable core [2023-09-01 08:23:48,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:49,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:24:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:21,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398919458] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:24:21,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:24:21,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 382 [2023-09-01 08:24:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415560858] [2023-09-01 08:24:21,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:24:21,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2023-09-01 08:24:21,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:24:21,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2023-09-01 08:24:21,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2023-09-01 08:24:24,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 161 [2023-09-01 08:24:24,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 6729 transitions, 83286 flow. Second operand has 384 states, 384 states have (on average 76.00520833333333) internal successors, (29186), 384 states have internal predecessors, (29186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:24,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:24:24,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 161 [2023-09-01 08:24:24,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15