./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.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 b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 11:14:12,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:14:12,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:14:12,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:14:12,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:14:12,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:14:12,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:14:12,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:14:12,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:14:12,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:14:12,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:14:12,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:14:12,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:14:12,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:14:12,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:14:12,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:14:12,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:14:12,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:14:12,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:14:12,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:14:12,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:14:12,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:14:12,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:14:12,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:14:12,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:14:12,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:14:12,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:14:12,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:14:12,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:14:12,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:14:12,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:14:12,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:14:12,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:14:12,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:14:12,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:14:12,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:14:12,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:14:12,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:14:12,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:14:12,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:14:12,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:14:12,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:14:12,570 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:14:12,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:14:12,573 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:14:12,573 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:14:12,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:14:12,574 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:14:12,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:14:12,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:14:12,575 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:14:12,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:14:12,576 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:14:12,576 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:14:12,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:14:12,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:14:12,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:14:12,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:14:12,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:14:12,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:14:12,577 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:14:12,577 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:14:12,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:14:12,578 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:14:12,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:14:12,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:14:12,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:14:12,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:14:12,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:14:12,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:14:12,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:14:12,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:14:12,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:14:12,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:14:12,580 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:14:12,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:14:12,580 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:14:12,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:14:12,581 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:14:12,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:14:12,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:14:12,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:14:12,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:14:12,914 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:14:12,915 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:14:12,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2023-08-30 11:14:14,165 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:14:14,395 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:14:14,395 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2023-08-30 11:14:14,401 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ebc4964/114a8fa90fd74a8da14a6ad7264f6051/FLAG69624e80c [2023-08-30 11:14:14,412 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ebc4964/114a8fa90fd74a8da14a6ad7264f6051 [2023-08-30 11:14:14,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:14:14,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:14:14,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:14:14,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:14:14,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:14:14,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d128a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14, skipping insertion in model container [2023-08-30 11:14:14,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:14:14,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:14:14,573 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/parallel-misc-3-extended.wvr.c[2856,2869] [2023-08-30 11:14:14,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:14:14,582 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:14:14,602 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/parallel-misc-3-extended.wvr.c[2856,2869] [2023-08-30 11:14:14,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:14:14,610 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:14:14,611 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:14:14,616 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:14:14,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14 WrapperNode [2023-08-30 11:14:14,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:14:14,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:14:14,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:14:14,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:14:14,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,665 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-08-30 11:14:14,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:14:14,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:14:14,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:14:14,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:14:14,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,708 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:14:14,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:14:14,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:14:14,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:14:14,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (1/1) ... [2023-08-30 11:14:14,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:14:14,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:14,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 11:14:14,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 11:14:14,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:14:14,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:14:14,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:14:14,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:14:14,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:14:14,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 11:14:14,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 11:14:14,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:14:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:14:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:14:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:14:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:14:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:14:14,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:14:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:14:14,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:14:14,793 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 11:14:14,914 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:14:14,916 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:14:15,128 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:14:15,214 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:14:15,214 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 11:14:15,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:14:15 BoogieIcfgContainer [2023-08-30 11:14:15,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:14:15,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:14:15,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:14:15,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:14:15,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:14:14" (1/3) ... [2023-08-30 11:14:15,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384107a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:14:15, skipping insertion in model container [2023-08-30 11:14:15,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:14:14" (2/3) ... [2023-08-30 11:14:15,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384107a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:14:15, skipping insertion in model container [2023-08-30 11:14:15,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:14:15" (3/3) ... [2023-08-30 11:14:15,224 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2023-08-30 11:14:15,231 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:14:15,240 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:14:15,240 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-08-30 11:14:15,240 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:14:15,371 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 11:14:15,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 137 transitions, 298 flow [2023-08-30 11:14:15,479 INFO L130 PetriNetUnfolder]: 16/134 cut-off events. [2023-08-30 11:14:15,479 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:14:15,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 134 events. 16/134 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 88. Up to 4 conditions per place. [2023-08-30 11:14:15,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 137 transitions, 298 flow [2023-08-30 11:14:15,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 116 transitions, 247 flow [2023-08-30 11:14:15,494 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:14:15,501 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 116 transitions, 247 flow [2023-08-30 11:14:15,503 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 116 transitions, 247 flow [2023-08-30 11:14:15,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 247 flow [2023-08-30 11:14:15,529 INFO L130 PetriNetUnfolder]: 15/116 cut-off events. [2023-08-30 11:14:15,529 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:14:15,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 116 events. 15/116 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 88. Up to 4 conditions per place. [2023-08-30 11:14:15,533 INFO L119 LiptonReduction]: Number of co-enabled transitions 4488 [2023-08-30 11:14:19,684 INFO L134 LiptonReduction]: Checked pairs total: 4739 [2023-08-30 11:14:19,684 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-30 11:14:19,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:14:19,702 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;@15042387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:14:19,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-08-30 11:14:19,704 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-30 11:14:19,705 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:14:19,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:19,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:14:19,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:14:19,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:19,710 INFO L85 PathProgramCache]: Analyzing trace with hash 590988, now seen corresponding path program 1 times [2023-08-30 11:14:19,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:19,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091953869] [2023-08-30 11:14:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:19,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:19,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091953869] [2023-08-30 11:14:19,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091953869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:14:19,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:14:19,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:14:19,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421429212] [2023-08-30 11:14:19,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:19,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:14:19,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:19,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:14:19,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:14:19,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 256 [2023-08-30 11:14:19,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:19,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:19,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 256 [2023-08-30 11:14:19,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:20,307 INFO L130 PetriNetUnfolder]: 1473/2114 cut-off events. [2023-08-30 11:14:20,308 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2023-08-30 11:14:20,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4379 conditions, 2114 events. 1473/2114 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 9501 event pairs, 693 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 4104. Up to 2037 conditions per place. [2023-08-30 11:14:20,330 INFO L137 encePairwiseOnDemand]: 240/256 looper letters, 40 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-08-30 11:14:20,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 203 flow [2023-08-30 11:14:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:14:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:14:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-30 11:14:20,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908854166666667 [2023-08-30 11:14:20,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-30 11:14:20,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-30 11:14:20,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:20,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-30 11:14:20,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:20,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:20,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:20,368 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 73 flow. Second operand 3 states and 377 transitions. [2023-08-30 11:14:20,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 203 flow [2023-08-30 11:14:20,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 187 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 11:14:20,377 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 112 flow [2023-08-30 11:14:20,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-08-30 11:14:20,384 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-08-30 11:14:20,385 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 112 flow [2023-08-30 11:14:20,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:20,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:20,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:14:20,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:14:20,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:14:20,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:20,392 INFO L85 PathProgramCache]: Analyzing trace with hash 18322249, now seen corresponding path program 1 times [2023-08-30 11:14:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:20,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516012802] [2023-08-30 11:14:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:20,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:20,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:20,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516012802] [2023-08-30 11:14:20,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516012802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:14:20,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939984388] [2023-08-30 11:14:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:20,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:20,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:20,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:14:20,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 11:14:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 11:14:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:14:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:21,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:14:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:21,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939984388] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:14:21,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:14:21,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 11:14:21,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321183540] [2023-08-30 11:14:21,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:14:21,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 11:14:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:21,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 11:14:21,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:14:21,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 256 [2023-08-30 11:14:21,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 101.5) internal successors, (812), 8 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:21,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:21,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 256 [2023-08-30 11:14:21,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:22,161 INFO L130 PetriNetUnfolder]: 4078/6181 cut-off events. [2023-08-30 11:14:22,161 INFO L131 PetriNetUnfolder]: For 290/290 co-relation queries the response was YES. [2023-08-30 11:14:22,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16421 conditions, 6181 events. 4078/6181 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 37668 event pairs, 159 based on Foata normal form. 0/3427 useless extension candidates. Maximal degree in co-relation 11196. Up to 3797 conditions per place. [2023-08-30 11:14:22,199 INFO L137 encePairwiseOnDemand]: 240/256 looper letters, 142 selfloop transitions, 56 changer transitions 0/198 dead transitions. [2023-08-30 11:14:22,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 198 transitions, 1016 flow [2023-08-30 11:14:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:14:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:14:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1450 transitions. [2023-08-30 11:14:22,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720052083333333 [2023-08-30 11:14:22,205 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1450 transitions. [2023-08-30 11:14:22,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1450 transitions. [2023-08-30 11:14:22,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:22,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1450 transitions. [2023-08-30 11:14:22,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:22,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 256.0) internal successors, (3328), 13 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:22,217 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 256.0) internal successors, (3328), 13 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:22,217 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 112 flow. Second operand 12 states and 1450 transitions. [2023-08-30 11:14:22,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 198 transitions, 1016 flow [2023-08-30 11:14:22,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 198 transitions, 1012 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:14:22,224 INFO L231 Difference]: Finished difference. Result has 52 places, 94 transitions, 673 flow [2023-08-30 11:14:22,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=673, PETRI_PLACES=52, PETRI_TRANSITIONS=94} [2023-08-30 11:14:22,225 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2023-08-30 11:14:22,226 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 94 transitions, 673 flow [2023-08-30 11:14:22,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.5) internal successors, (812), 8 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:22,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:22,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 11:14:22,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 11:14:22,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:22,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:14:22,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:22,432 INFO L85 PathProgramCache]: Analyzing trace with hash 18322243, now seen corresponding path program 1 times [2023-08-30 11:14:22,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:22,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157391252] [2023-08-30 11:14:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:22,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:22,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157391252] [2023-08-30 11:14:22,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157391252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:14:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697242904] [2023-08-30 11:14:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:22,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:22,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:14:22,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 11:14:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:22,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 11:14:22,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:14:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:22,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:14:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:23,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697242904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:14:23,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:14:23,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 11:14:23,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867987281] [2023-08-30 11:14:23,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:14:23,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 11:14:23,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:23,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 11:14:23,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:14:23,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 256 [2023-08-30 11:14:23,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 94 transitions, 673 flow. Second operand has 8 states, 8 states have (on average 101.5) internal successors, (812), 8 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:23,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:23,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 256 [2023-08-30 11:14:23,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:24,267 INFO L130 PetriNetUnfolder]: 5525/8404 cut-off events. [2023-08-30 11:14:24,269 INFO L131 PetriNetUnfolder]: For 22921/22921 co-relation queries the response was YES. [2023-08-30 11:14:24,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35753 conditions, 8404 events. 5525/8404 cut-off events. For 22921/22921 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 52541 event pairs, 137 based on Foata normal form. 844/8544 useless extension candidates. Maximal degree in co-relation 26042. Up to 5051 conditions per place. [2023-08-30 11:14:24,338 INFO L137 encePairwiseOnDemand]: 240/256 looper letters, 131 selfloop transitions, 73 changer transitions 0/204 dead transitions. [2023-08-30 11:14:24,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 204 transitions, 1757 flow [2023-08-30 11:14:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 11:14:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 11:14:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 942 transitions. [2023-08-30 11:14:24,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599609375 [2023-08-30 11:14:24,342 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 942 transitions. [2023-08-30 11:14:24,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 942 transitions. [2023-08-30 11:14:24,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:24,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 942 transitions. [2023-08-30 11:14:24,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.75) internal successors, (942), 8 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:24,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:24,350 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 256.0) internal successors, (2304), 9 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:24,350 INFO L175 Difference]: Start difference. First operand has 52 places, 94 transitions, 673 flow. Second operand 8 states and 942 transitions. [2023-08-30 11:14:24,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 204 transitions, 1757 flow [2023-08-30 11:14:24,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 204 transitions, 1622 flow, removed 65 selfloop flow, removed 3 redundant places. [2023-08-30 11:14:24,604 INFO L231 Difference]: Finished difference. Result has 60 places, 136 transitions, 1392 flow [2023-08-30 11:14:24,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=60, PETRI_TRANSITIONS=136} [2023-08-30 11:14:24,605 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-08-30 11:14:24,605 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 136 transitions, 1392 flow [2023-08-30 11:14:24,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.5) internal successors, (812), 8 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:24,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:24,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:14:24,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 11:14:24,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 11:14:24,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:14:24,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash 359364977, now seen corresponding path program 1 times [2023-08-30 11:14:24,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:24,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393101631] [2023-08-30 11:14:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:24,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:24,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:24,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393101631] [2023-08-30 11:14:24,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393101631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:14:24,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:14:24,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:14:24,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420936591] [2023-08-30 11:14:24,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:24,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:14:24,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:24,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:14:24,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:14:24,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 256 [2023-08-30 11:14:24,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 136 transitions, 1392 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:24,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:24,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 256 [2023-08-30 11:14:24,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:25,793 INFO L130 PetriNetUnfolder]: 4641/7070 cut-off events. [2023-08-30 11:14:25,794 INFO L131 PetriNetUnfolder]: For 39502/39502 co-relation queries the response was YES. [2023-08-30 11:14:25,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35489 conditions, 7070 events. 4641/7070 cut-off events. For 39502/39502 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 42715 event pairs, 2210 based on Foata normal form. 352/7412 useless extension candidates. Maximal degree in co-relation 21059. Up to 7070 conditions per place. [2023-08-30 11:14:25,853 INFO L137 encePairwiseOnDemand]: 254/256 looper letters, 128 selfloop transitions, 1 changer transitions 0/129 dead transitions. [2023-08-30 11:14:25,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 129 transitions, 1582 flow [2023-08-30 11:14:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:14:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:14:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2023-08-30 11:14:25,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518229166666667 [2023-08-30 11:14:25,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2023-08-30 11:14:25,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2023-08-30 11:14:25,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:25,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2023-08-30 11:14:25,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:25,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:25,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:25,858 INFO L175 Difference]: Start difference. First operand has 60 places, 136 transitions, 1392 flow. Second operand 3 states and 347 transitions. [2023-08-30 11:14:25,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 129 transitions, 1582 flow [2023-08-30 11:14:26,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 129 transitions, 1439 flow, removed 69 selfloop flow, removed 2 redundant places. [2023-08-30 11:14:26,141 INFO L231 Difference]: Finished difference. Result has 59 places, 129 transitions, 1183 flow [2023-08-30 11:14:26,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1183, PETRI_PLACES=59, PETRI_TRANSITIONS=129} [2023-08-30 11:14:26,142 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-08-30 11:14:26,142 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 129 transitions, 1183 flow [2023-08-30 11:14:26,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:26,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:26,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:14:26,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 11:14:26,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:14:26,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash 362911075, now seen corresponding path program 1 times [2023-08-30 11:14:26,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:26,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595087035] [2023-08-30 11:14:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:26,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:26,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595087035] [2023-08-30 11:14:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595087035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:14:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420098786] [2023-08-30 11:14:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:26,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:26,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:26,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:14:26,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 11:14:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:26,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:14:26,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:14:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:26,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:14:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:26,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420098786] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:14:26,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:14:26,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 8 [2023-08-30 11:14:26,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338956619] [2023-08-30 11:14:26,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:26,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:14:26,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:14:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-30 11:14:26,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 256 [2023-08-30 11:14:26,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 129 transitions, 1183 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:26,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:26,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 256 [2023-08-30 11:14:26,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:27,498 INFO L130 PetriNetUnfolder]: 4049/6176 cut-off events. [2023-08-30 11:14:27,498 INFO L131 PetriNetUnfolder]: For 21874/21874 co-relation queries the response was YES. [2023-08-30 11:14:27,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27343 conditions, 6176 events. 4049/6176 cut-off events. For 21874/21874 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 36497 event pairs, 1977 based on Foata normal form. 214/6380 useless extension candidates. Maximal degree in co-relation 27323. Up to 6176 conditions per place. [2023-08-30 11:14:27,543 INFO L137 encePairwiseOnDemand]: 254/256 looper letters, 120 selfloop transitions, 1 changer transitions 0/121 dead transitions. [2023-08-30 11:14:27,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 121 transitions, 1347 flow [2023-08-30 11:14:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:14:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:14:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-08-30 11:14:27,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505208333333333 [2023-08-30 11:14:27,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-08-30 11:14:27,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-08-30 11:14:27,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:27,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-08-30 11:14:27,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:27,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:27,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:27,547 INFO L175 Difference]: Start difference. First operand has 59 places, 129 transitions, 1183 flow. Second operand 3 states and 346 transitions. [2023-08-30 11:14:27,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 121 transitions, 1347 flow [2023-08-30 11:14:27,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 121 transitions, 1346 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:14:27,691 INFO L231 Difference]: Finished difference. Result has 59 places, 121 transitions, 1106 flow [2023-08-30 11:14:27,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1106, PETRI_PLACES=59, PETRI_TRANSITIONS=121} [2023-08-30 11:14:27,693 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-08-30 11:14:27,693 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 121 transitions, 1106 flow [2023-08-30 11:14:27,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:27,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:27,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:14:27,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 11:14:27,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:27,901 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:14:27,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:27,902 INFO L85 PathProgramCache]: Analyzing trace with hash 362911068, now seen corresponding path program 1 times [2023-08-30 11:14:27,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:27,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509087920] [2023-08-30 11:14:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:27,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509087920] [2023-08-30 11:14:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509087920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:14:28,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307306177] [2023-08-30 11:14:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:28,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:28,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:28,012 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:14:28,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 11:14:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:28,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:14:28,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:14:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:28,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:14:28,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307306177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:14:28,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:14:28,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 11:14:28,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766120320] [2023-08-30 11:14:28,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:14:28,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:14:28,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:14:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:14:28,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 256 [2023-08-30 11:14:28,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 121 transitions, 1106 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:28,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:28,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 256 [2023-08-30 11:14:28,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:28,820 INFO L130 PetriNetUnfolder]: 2527/3830 cut-off events. [2023-08-30 11:14:28,821 INFO L131 PetriNetUnfolder]: For 20665/20665 co-relation queries the response was YES. [2023-08-30 11:14:28,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15360 conditions, 3830 events. 2527/3830 cut-off events. For 20665/20665 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20350 event pairs, 643 based on Foata normal form. 1226/5056 useless extension candidates. Maximal degree in co-relation 15339. Up to 2462 conditions per place. [2023-08-30 11:14:28,842 INFO L137 encePairwiseOnDemand]: 246/256 looper letters, 106 selfloop transitions, 36 changer transitions 0/142 dead transitions. [2023-08-30 11:14:28,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 142 transitions, 1478 flow [2023-08-30 11:14:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:14:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:14:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2023-08-30 11:14:28,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46484375 [2023-08-30 11:14:28,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2023-08-30 11:14:28,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2023-08-30 11:14:28,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:28,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2023-08-30 11:14:28,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:28,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:28,850 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:28,851 INFO L175 Difference]: Start difference. First operand has 59 places, 121 transitions, 1106 flow. Second operand 4 states and 476 transitions. [2023-08-30 11:14:28,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 142 transitions, 1478 flow [2023-08-30 11:14:28,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 142 transitions, 1441 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-30 11:14:28,911 INFO L231 Difference]: Finished difference. Result has 57 places, 117 transitions, 1203 flow [2023-08-30 11:14:28,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1203, PETRI_PLACES=57, PETRI_TRANSITIONS=117} [2023-08-30 11:14:28,914 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2023-08-30 11:14:28,915 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 117 transitions, 1203 flow [2023-08-30 11:14:28,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:28,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:28,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:14:28,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 11:14:29,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:29,126 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:14:29,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:29,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1744585825, now seen corresponding path program 1 times [2023-08-30 11:14:29,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:29,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155941281] [2023-08-30 11:14:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:29,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:29,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155941281] [2023-08-30 11:14:29,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155941281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:14:29,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535491715] [2023-08-30 11:14:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:29,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:29,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:29,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:14:29,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 11:14:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:29,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:14:29,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:14:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:29,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:14:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535491715] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:14:30,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:14:30,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 11:14:30,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940264911] [2023-08-30 11:14:30,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:14:30,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:14:30,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:14:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:14:30,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 256 [2023-08-30 11:14:30,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 117 transitions, 1203 flow. Second operand has 14 states, 14 states have (on average 86.71428571428571) internal successors, (1214), 14 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:30,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:30,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 256 [2023-08-30 11:14:30,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:31,796 INFO L130 PetriNetUnfolder]: 5912/8803 cut-off events. [2023-08-30 11:14:31,796 INFO L131 PetriNetUnfolder]: For 38729/38729 co-relation queries the response was YES. [2023-08-30 11:14:31,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38769 conditions, 8803 events. 5912/8803 cut-off events. For 38729/38729 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 51980 event pairs, 307 based on Foata normal form. 330/9133 useless extension candidates. Maximal degree in co-relation 38746. Up to 3357 conditions per place. [2023-08-30 11:14:31,871 INFO L137 encePairwiseOnDemand]: 244/256 looper letters, 191 selfloop transitions, 238 changer transitions 0/429 dead transitions. [2023-08-30 11:14:31,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 429 transitions, 4725 flow [2023-08-30 11:14:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:14:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:14:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1397 transitions. [2023-08-30 11:14:31,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38978794642857145 [2023-08-30 11:14:31,876 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1397 transitions. [2023-08-30 11:14:31,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1397 transitions. [2023-08-30 11:14:31,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:31,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1397 transitions. [2023-08-30 11:14:31,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 99.78571428571429) internal successors, (1397), 14 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:31,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 256.0) internal successors, (3840), 15 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:31,885 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 256.0) internal successors, (3840), 15 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:31,885 INFO L175 Difference]: Start difference. First operand has 57 places, 117 transitions, 1203 flow. Second operand 14 states and 1397 transitions. [2023-08-30 11:14:31,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 429 transitions, 4725 flow [2023-08-30 11:14:32,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 429 transitions, 4724 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:14:32,035 INFO L231 Difference]: Finished difference. Result has 81 places, 305 transitions, 4484 flow [2023-08-30 11:14:32,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4484, PETRI_PLACES=81, PETRI_TRANSITIONS=305} [2023-08-30 11:14:32,036 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 45 predicate places. [2023-08-30 11:14:32,036 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 305 transitions, 4484 flow [2023-08-30 11:14:32,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.71428571428571) internal successors, (1214), 14 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:32,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:32,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:14:32,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 11:14:32,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:32,241 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:14:32,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:32,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1744585870, now seen corresponding path program 1 times [2023-08-30 11:14:32,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:32,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070154125] [2023-08-30 11:14:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:32,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:32,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:32,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070154125] [2023-08-30 11:14:32,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070154125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:14:32,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394575302] [2023-08-30 11:14:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:32,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:32,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:32,427 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:14:32,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 11:14:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 11:14:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:14:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:32,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:14:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:33,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394575302] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:14:33,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:14:33,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 11:14:33,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671512654] [2023-08-30 11:14:33,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:14:33,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:14:33,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:33,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:14:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:14:33,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 256 [2023-08-30 11:14:33,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 305 transitions, 4484 flow. Second operand has 14 states, 14 states have (on average 90.71428571428571) internal successors, (1270), 14 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:33,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:33,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 256 [2023-08-30 11:14:33,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:35,855 INFO L130 PetriNetUnfolder]: 10117/14812 cut-off events. [2023-08-30 11:14:35,855 INFO L131 PetriNetUnfolder]: For 154388/154388 co-relation queries the response was YES. [2023-08-30 11:14:35,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88293 conditions, 14812 events. 10117/14812 cut-off events. For 154388/154388 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 90934 event pairs, 667 based on Foata normal form. 546/15358 useless extension candidates. Maximal degree in co-relation 88257. Up to 6107 conditions per place. [2023-08-30 11:14:35,985 INFO L137 encePairwiseOnDemand]: 245/256 looper letters, 325 selfloop transitions, 475 changer transitions 0/800 dead transitions. [2023-08-30 11:14:35,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 800 transitions, 12243 flow [2023-08-30 11:14:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:14:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:14:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1761 transitions. [2023-08-30 11:14:35,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046415441176471 [2023-08-30 11:14:35,991 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1761 transitions. [2023-08-30 11:14:35,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1761 transitions. [2023-08-30 11:14:35,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:35,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1761 transitions. [2023-08-30 11:14:35,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.58823529411765) internal successors, (1761), 17 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:36,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:36,004 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 256.0) internal successors, (4608), 18 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:36,004 INFO L175 Difference]: Start difference. First operand has 81 places, 305 transitions, 4484 flow. Second operand 17 states and 1761 transitions. [2023-08-30 11:14:36,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 800 transitions, 12243 flow [2023-08-30 11:14:37,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 800 transitions, 11494 flow, removed 372 selfloop flow, removed 2 redundant places. [2023-08-30 11:14:37,155 INFO L231 Difference]: Finished difference. Result has 109 places, 615 transitions, 10990 flow [2023-08-30 11:14:37,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=3817, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10990, PETRI_PLACES=109, PETRI_TRANSITIONS=615} [2023-08-30 11:14:37,156 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 73 predicate places. [2023-08-30 11:14:37,157 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 615 transitions, 10990 flow [2023-08-30 11:14:37,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 90.71428571428571) internal successors, (1270), 14 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:37,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:37,157 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:14:37,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 11:14:37,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:37,360 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:14:37,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:37,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1744556073, now seen corresponding path program 2 times [2023-08-30 11:14:37,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:37,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665128852] [2023-08-30 11:14:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:37,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:37,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665128852] [2023-08-30 11:14:37,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665128852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:14:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869593472] [2023-08-30 11:14:37,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:14:37,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:37,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:37,553 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:14:37,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 11:14:37,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:14:37,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:14:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 11:14:37,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:14:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:37,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:14:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:38,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869593472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:14:38,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:14:38,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-30 11:14:38,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18943718] [2023-08-30 11:14:38,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:14:38,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 11:14:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:38,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 11:14:38,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:14:38,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 256 [2023-08-30 11:14:38,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 615 transitions, 10990 flow. Second operand has 14 states, 14 states have (on average 88.71428571428571) internal successors, (1242), 14 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:38,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:38,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 256 [2023-08-30 11:14:38,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:14:43,335 INFO L130 PetriNetUnfolder]: 19185/27834 cut-off events. [2023-08-30 11:14:43,336 INFO L131 PetriNetUnfolder]: For 486411/486411 co-relation queries the response was YES. [2023-08-30 11:14:43,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198301 conditions, 27834 events. 19185/27834 cut-off events. For 486411/486411 co-relation queries the response was YES. Maximal size of possible extension queue 1455. Compared 181717 event pairs, 993 based on Foata normal form. 1040/28874 useless extension candidates. Maximal degree in co-relation 198251. Up to 9337 conditions per place. [2023-08-30 11:14:43,657 INFO L137 encePairwiseOnDemand]: 244/256 looper letters, 511 selfloop transitions, 1354 changer transitions 0/1865 dead transitions. [2023-08-30 11:14:43,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 1865 transitions, 35289 flow [2023-08-30 11:14:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:14:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:14:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2050 transitions. [2023-08-30 11:14:43,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.400390625 [2023-08-30 11:14:43,669 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2050 transitions. [2023-08-30 11:14:43,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2050 transitions. [2023-08-30 11:14:43,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:14:43,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2050 transitions. [2023-08-30 11:14:43,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 102.5) internal successors, (2050), 20 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:43,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 256.0) internal successors, (5376), 21 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:43,682 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 256.0) internal successors, (5376), 21 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:43,682 INFO L175 Difference]: Start difference. First operand has 109 places, 615 transitions, 10990 flow. Second operand 20 states and 2050 transitions. [2023-08-30 11:14:43,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 1865 transitions, 35289 flow [2023-08-30 11:14:50,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 1865 transitions, 33306 flow, removed 974 selfloop flow, removed 6 redundant places. [2023-08-30 11:14:50,079 INFO L231 Difference]: Finished difference. Result has 138 places, 1673 transitions, 34345 flow [2023-08-30 11:14:50,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=10137, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=34345, PETRI_PLACES=138, PETRI_TRANSITIONS=1673} [2023-08-30 11:14:50,080 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 102 predicate places. [2023-08-30 11:14:50,080 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 1673 transitions, 34345 flow [2023-08-30 11:14:50,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 88.71428571428571) internal successors, (1242), 14 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:50,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:14:50,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-30 11:14:50,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 11:14:50,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:50,286 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:14:50,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:14:50,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1752414803, now seen corresponding path program 1 times [2023-08-30 11:14:50,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:14:50,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004249425] [2023-08-30 11:14:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:50,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:14:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:50,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:14:50,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004249425] [2023-08-30 11:14:50,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004249425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:14:50,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712273025] [2023-08-30 11:14:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:14:50,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:14:50,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:14:50,499 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:14:50,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 11:14:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:14:50,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:14:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:14:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:50,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:14:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:14:51,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712273025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:14:51,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:14:51,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 11:14:51,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131566438] [2023-08-30 11:14:51,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:14:51,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:14:51,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:14:51,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:14:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:14:51,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 256 [2023-08-30 11:14:51,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 1673 transitions, 34345 flow. Second operand has 15 states, 15 states have (on average 86.73333333333333) internal successors, (1301), 15 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:14:51,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:14:51,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 256 [2023-08-30 11:14:51,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:15:07,979 INFO L130 PetriNetUnfolder]: 35085/50482 cut-off events. [2023-08-30 11:15:07,980 INFO L131 PetriNetUnfolder]: For 1191000/1191000 co-relation queries the response was YES. [2023-08-30 11:15:08,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420055 conditions, 50482 events. 35085/50482 cut-off events. For 1191000/1191000 co-relation queries the response was YES. Maximal size of possible extension queue 2544. Compared 348419 event pairs, 1337 based on Foata normal form. 3856/54338 useless extension candidates. Maximal degree in co-relation 419991. Up to 12459 conditions per place. [2023-08-30 11:15:08,619 INFO L137 encePairwiseOnDemand]: 244/256 looper letters, 1624 selfloop transitions, 3060 changer transitions 1/4685 dead transitions. [2023-08-30 11:15:08,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 4685 transitions, 102161 flow [2023-08-30 11:15:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 11:15:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 11:15:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3629 transitions. [2023-08-30 11:15:08,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38312922297297297 [2023-08-30 11:15:08,629 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3629 transitions. [2023-08-30 11:15:08,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3629 transitions. [2023-08-30 11:15:08,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:15:08,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3629 transitions. [2023-08-30 11:15:08,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 98.08108108108108) internal successors, (3629), 37 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:08,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 256.0) internal successors, (9728), 38 states have internal predecessors, (9728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:08,656 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 256.0) internal successors, (9728), 38 states have internal predecessors, (9728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:15:08,657 INFO L175 Difference]: Start difference. First operand has 138 places, 1673 transitions, 34345 flow. Second operand 37 states and 3629 transitions. [2023-08-30 11:15:08,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 4685 transitions, 102161 flow [2023-08-30 11:16:01,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 4685 transitions, 96783 flow, removed 2681 selfloop flow, removed 3 redundant places. [2023-08-30 11:16:01,662 INFO L231 Difference]: Finished difference. Result has 204 places, 3877 transitions, 91854 flow [2023-08-30 11:16:01,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=30812, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=91854, PETRI_PLACES=204, PETRI_TRANSITIONS=3877} [2023-08-30 11:16:01,664 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 168 predicate places. [2023-08-30 11:16:01,664 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 3877 transitions, 91854 flow [2023-08-30 11:16:01,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.73333333333333) internal successors, (1301), 15 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:01,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:16:01,665 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:16:01,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 11:16:01,869 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,SelfDestructingSolverStorable9 [2023-08-30 11:16:01,870 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:16:01,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:16:01,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1744556995, now seen corresponding path program 2 times [2023-08-30 11:16:01,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:16:01,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948896673] [2023-08-30 11:16:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:16:01,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:16:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:16:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:01,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:16:01,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948896673] [2023-08-30 11:16:01,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948896673] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:16:01,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442746500] [2023-08-30 11:16:01,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:16:01,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:16:01,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:16:01,977 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:16:01,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 11:16:02,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:16:02,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:16:02,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 11:16:02,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:16:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:02,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:16:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:16:02,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442746500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:16:02,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:16:02,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 4, 4] total 10 [2023-08-30 11:16:02,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028721685] [2023-08-30 11:16:02,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:16:02,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:16:02,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:16:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:16:02,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:16:02,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 256 [2023-08-30 11:16:02,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 3877 transitions, 91854 flow. Second operand has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:16:02,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:16:02,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 256 [2023-08-30 11:16:02,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:17:11,900 INFO L130 PetriNetUnfolder]: 66010/95075 cut-off events. [2023-08-30 11:17:11,900 INFO L131 PetriNetUnfolder]: For 3209591/3209591 co-relation queries the response was YES. [2023-08-30 11:17:13,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925091 conditions, 95075 events. 66010/95075 cut-off events. For 3209591/3209591 co-relation queries the response was YES. Maximal size of possible extension queue 5157. Compared 714909 event pairs, 3472 based on Foata normal form. 3522/98597 useless extension candidates. Maximal degree in co-relation 924995. Up to 18257 conditions per place. [2023-08-30 11:17:13,642 INFO L137 encePairwiseOnDemand]: 244/256 looper letters, 3808 selfloop transitions, 5461 changer transitions 0/9269 dead transitions. [2023-08-30 11:17:13,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 9269 transitions, 234371 flow [2023-08-30 11:17:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 11:17:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 11:17:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2081 transitions. [2023-08-30 11:17:13,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38709077380952384 [2023-08-30 11:17:13,646 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2081 transitions. [2023-08-30 11:17:13,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2081 transitions. [2023-08-30 11:17:13,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:17:13,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2081 transitions. [2023-08-30 11:17:13,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 99.0952380952381) internal successors, (2081), 21 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:13,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:13,670 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:17:13,671 INFO L175 Difference]: Start difference. First operand has 204 places, 3877 transitions, 91854 flow. Second operand 21 states and 2081 transitions. [2023-08-30 11:17:13,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 9269 transitions, 234371 flow [2023-08-30 11:22:01,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 9269 transitions, 229882 flow, removed 2237 selfloop flow, removed 3 redundant places. [2023-08-30 11:22:01,537 INFO L231 Difference]: Finished difference. Result has 240 places, 7773 transitions, 206399 flow [2023-08-30 11:22:01,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=87448, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2024, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1022, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=206399, PETRI_PLACES=240, PETRI_TRANSITIONS=7773} [2023-08-30 11:22:01,541 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 204 predicate places. [2023-08-30 11:22:01,541 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 7773 transitions, 206399 flow [2023-08-30 11:22:01,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:22:01,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:22:01,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:22:01,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 11:22:01,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:22:01,750 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2023-08-30 11:22:01,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:22:01,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1732156840, now seen corresponding path program 1 times [2023-08-30 11:22:01,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:22:01,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010366325] [2023-08-30 11:22:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:22:01,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:22:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:22:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:22:01,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:22:01,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010366325] [2023-08-30 11:22:01,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010366325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:22:01,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949683234] [2023-08-30 11:22:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:22:01,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:22:01,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:22:01,811 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:22:01,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 11:22:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:22:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:22:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:22:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:22:02,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:22:02,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949683234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:22:02,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:22:02,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-30 11:22:02,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795119473] [2023-08-30 11:22:02,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:22:02,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:22:02,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:22:02,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:22:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:22:02,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 256 [2023-08-30 11:22:02,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 7773 transitions, 206399 flow. Second operand has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:22:02,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:22:02,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 256 [2023-08-30 11:22:02,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:24:40,459 INFO L130 PetriNetUnfolder]: 59195/85582 cut-off events. [2023-08-30 11:24:40,459 INFO L131 PetriNetUnfolder]: For 3771489/3771489 co-relation queries the response was YES. [2023-08-30 11:24:41,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933236 conditions, 85582 events. 59195/85582 cut-off events. For 3771489/3771489 co-relation queries the response was YES. Maximal size of possible extension queue 4474. Compared 635092 event pairs, 5468 based on Foata normal form. 4500/90082 useless extension candidates. Maximal degree in co-relation 933121. Up to 68748 conditions per place. [2023-08-30 11:24:42,270 INFO L137 encePairwiseOnDemand]: 250/256 looper letters, 5497 selfloop transitions, 1506 changer transitions 124/7127 dead transitions. [2023-08-30 11:24:42,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 7127 transitions, 203703 flow [2023-08-30 11:24:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:24:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:24:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2023-08-30 11:24:42,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45703125 [2023-08-30 11:24:42,272 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2023-08-30 11:24:42,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2023-08-30 11:24:42,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:24:42,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2023-08-30 11:24:42,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:42,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:42,273 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:24:42,274 INFO L175 Difference]: Start difference. First operand has 240 places, 7773 transitions, 206399 flow. Second operand 4 states and 468 transitions. [2023-08-30 11:24:42,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 7127 transitions, 203703 flow Killed by 15