./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/pthread-ext/01b_inc.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --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 16:23:55,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:23:55,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:23:56,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:23:56,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:23:56,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:23:56,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:23:56,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:23:56,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:23:56,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:23:56,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:23:56,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:23:56,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:23:56,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:23:56,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:23:56,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:23:56,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:23:56,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:23:56,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:23:56,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:23:56,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:23:56,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:23:56,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:23:56,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:23:56,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:23:56,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:23:56,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:23:56,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:23:56,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:23:56,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:23:56,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:23:56,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:23:56,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:23:56,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:23:56,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:23:56,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:23:56,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:23:56,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:23:56,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:23:56,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:23:56,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:23:56,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:23:56,134 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:23:56,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:23:56,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:23:56,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:23:56,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:23:56,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:23:56,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:23:56,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:23:56,138 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:23:56,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:23:56,139 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:23:56,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:23:56,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:23:56,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:23:56,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:23:56,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:23:56,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:23:56,140 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:23:56,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:23:56,140 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:23:56,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:23:56,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:23:56,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:23:56,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:23:56,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:23:56,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:23:56,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:23:56,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:23:56,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:23:56,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:23:56,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:23:56,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:23:56,143 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:23:56,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:23:56,143 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:23:56,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:23:56,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:23:56,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:23:56,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:23:56,472 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:23:56,473 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:23:56,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-30 16:23:57,591 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:23:57,866 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:23:57,866 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-08-30 16:23:57,877 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394ce6e7b/062e4316458840cb82c40d106a6a7c74/FLAG51f7c9fe6 [2023-08-30 16:23:57,892 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394ce6e7b/062e4316458840cb82c40d106a6a7c74 [2023-08-30 16:23:57,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:23:57,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:23:57,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:23:57,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:23:57,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:23:57,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:23:57" (1/1) ... [2023-08-30 16:23:57,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486ce049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:57, skipping insertion in model container [2023-08-30 16:23:57,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:23:57" (1/1) ... [2023-08-30 16:23:57,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:23:57,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:23:58,157 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 16:23:58,304 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2023-08-30 16:23:58,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:23:58,323 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:23:58,337 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 16:23:58,351 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2023-08-30 16:23:58,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:23:58,383 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:23:58,384 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:23:58,384 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:23:58,390 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:23:58,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58 WrapperNode [2023-08-30 16:23:58,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:23:58,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:23:58,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:23:58,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:23:58,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,500 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2023-08-30 16:23:58,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:23:58,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:23:58,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:23:58,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:23:58,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,527 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:23:58,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:23:58,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:23:58,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:23:58,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (1/1) ... [2023-08-30 16:23:58,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:23:58,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:23:58,570 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 16:23:58,592 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 16:23:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:23:58,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:23:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:23:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 16:23:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:23:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:23:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:23:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:23:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 16:23:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:23:58,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:23:58,608 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 16:23:58,766 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:23:58,772 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:23:58,936 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:23:58,987 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:23:58,987 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 16:23:58,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:23:58 BoogieIcfgContainer [2023-08-30 16:23:58,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:23:58,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:23:58,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:23:58,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:23:58,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:23:57" (1/3) ... [2023-08-30 16:23:58,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544484dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:23:58, skipping insertion in model container [2023-08-30 16:23:58,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:58" (2/3) ... [2023-08-30 16:23:58,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544484dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:23:58, skipping insertion in model container [2023-08-30 16:23:58,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:23:58" (3/3) ... [2023-08-30 16:23:58,996 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2023-08-30 16:23:59,003 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:23:59,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:23:59,012 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:23:59,012 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:23:59,073 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:23:59,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-08-30 16:23:59,130 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2023-08-30 16:23:59,131 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:23:59,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-30 16:23:59,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 85 flow [2023-08-30 16:23:59,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 85 flow [2023-08-30 16:23:59,140 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:23:59,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 40 transitions, 85 flow [2023-08-30 16:23:59,151 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 40 transitions, 85 flow [2023-08-30 16:23:59,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-08-30 16:23:59,163 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2023-08-30 16:23:59,163 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:23:59,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-30 16:23:59,171 INFO L119 LiptonReduction]: Number of co-enabled transitions 364 [2023-08-30 16:24:00,719 INFO L134 LiptonReduction]: Checked pairs total: 330 [2023-08-30 16:24:00,719 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-30 16:24:00,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:24:00,740 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;@49efa9c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:24:00,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:24:00,742 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:24:00,743 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:24:00,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:00,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:24:00,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:00,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash 7473566, now seen corresponding path program 1 times [2023-08-30 16:24:00,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:00,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516161738] [2023-08-30 16:24:00,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:00,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:00,915 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 16:24:00,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:00,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516161738] [2023-08-30 16:24:00,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516161738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:00,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:00,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:24:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572527119] [2023-08-30 16:24:00,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:00,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:24:00,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:00,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:24:00,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:24:00,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 78 [2023-08-30 16:24:00,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:00,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:00,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 78 [2023-08-30 16:24:00,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:00,971 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 16:24:00,972 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:24:00,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-30 16:24:00,973 INFO L137 encePairwiseOnDemand]: 76/78 looper letters, 0 selfloop transitions, 0 changer transitions 6/6 dead transitions. [2023-08-30 16:24:00,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-30 16:24:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:24:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:24:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2023-08-30 16:24:00,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2023-08-30 16:24:00,983 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 71 transitions. [2023-08-30 16:24:00,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 71 transitions. [2023-08-30 16:24:00,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:00,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 71 transitions. [2023-08-30 16:24:00,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 35.5) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:00,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:00,991 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:00,992 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 71 transitions. [2023-08-30 16:24:00,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-30 16:24:00,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:24:00,995 INFO L231 Difference]: Finished difference. Result has 10 places, 0 transitions, 0 flow [2023-08-30 16:24:00,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=10, PETRI_TRANSITIONS=0} [2023-08-30 16:24:01,000 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-30 16:24:01,000 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 0 transitions, 0 flow [2023-08-30 16:24:01,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:01,002 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:24:01,003 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:24:01,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:24:01,004 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:24:01,006 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 16:24:01,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-08-30 16:24:01,017 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2023-08-30 16:24:01,018 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:24:01,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-30 16:24:01,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 85 flow [2023-08-30 16:24:01,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 85 flow [2023-08-30 16:24:01,019 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:24:01,019 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 40 transitions, 85 flow [2023-08-30 16:24:01,020 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 40 transitions, 85 flow [2023-08-30 16:24:01,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-08-30 16:24:01,026 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2023-08-30 16:24:01,027 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:24:01,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-08-30 16:24:01,028 INFO L119 LiptonReduction]: Number of co-enabled transitions 364 [2023-08-30 16:24:02,419 INFO L134 LiptonReduction]: Checked pairs total: 340 [2023-08-30 16:24:02,420 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-08-30 16:24:02,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:24:02,422 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;@49efa9c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:24:02,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:24:02,425 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-08-30 16:24:02,425 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:24:02,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:02,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 16:24:02,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:24:02,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash -255263165, now seen corresponding path program 1 times [2023-08-30 16:24:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:02,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364486828] [2023-08-30 16:24:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:02,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:24:02,456 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:24:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:24:02,482 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:24:02,482 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:24:02,482 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:24:02,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:24:02,482 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:24:02,483 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:24:02,484 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:24:02,484 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 16:24:02,496 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:24:02,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:02,514 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2023-08-30 16:24:02,515 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:24:02,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 16:24:02,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:02,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:02,516 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:24:02,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:02,517 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:02,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:02,525 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2023-08-30 16:24:02,525 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:24:02,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 16:24:02,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 1148 [2023-08-30 16:24:03,388 INFO L134 LiptonReduction]: Checked pairs total: 3716 [2023-08-30 16:24:03,388 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-08-30 16:24:03,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:24:03,391 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;@49efa9c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:24:03,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:24:03,395 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2023-08-30 16:24:03,395 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:24:03,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:03,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:03,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:03,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash -487793690, now seen corresponding path program 1 times [2023-08-30 16:24:03,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:03,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525441127] [2023-08-30 16:24:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:03,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:03,636 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 16:24:03,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:03,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525441127] [2023-08-30 16:24:03,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525441127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:03,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:03,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:24:03,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373049448] [2023-08-30 16:24:03,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:03,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:24:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:24:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:24:03,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 87 [2023-08-30 16:24:03,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:03,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:03,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 87 [2023-08-30 16:24:03,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:03,834 INFO L130 PetriNetUnfolder]: 200/387 cut-off events. [2023-08-30 16:24:03,834 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 16:24:03,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 387 events. 200/387 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1940 event pairs, 51 based on Foata normal form. 12/350 useless extension candidates. Maximal degree in co-relation 704. Up to 128 conditions per place. [2023-08-30 16:24:03,842 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 32 selfloop transitions, 9 changer transitions 3/50 dead transitions. [2023-08-30 16:24:03,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 50 transitions, 210 flow [2023-08-30 16:24:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:24:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:24:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 257 transitions. [2023-08-30 16:24:03,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49233716475095785 [2023-08-30 16:24:03,851 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 257 transitions. [2023-08-30 16:24:03,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 257 transitions. [2023-08-30 16:24:03,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:03,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 257 transitions. [2023-08-30 16:24:03,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 42.833333333333336) internal successors, (257), 6 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:03,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:03,858 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:03,858 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 6 states and 257 transitions. [2023-08-30 16:24:03,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 50 transitions, 210 flow [2023-08-30 16:24:03,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 208 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:24:03,861 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 105 flow [2023-08-30 16:24:03,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-30 16:24:03,863 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-08-30 16:24:03,863 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 105 flow [2023-08-30 16:24:03,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:03,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:03,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:03,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:24:03,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:03,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:03,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1634037247, now seen corresponding path program 1 times [2023-08-30 16:24:03,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:03,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974034209] [2023-08-30 16:24:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:03,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:04,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:04,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974034209] [2023-08-30 16:24:04,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974034209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:04,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:04,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:24:04,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002963078] [2023-08-30 16:24:04,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:04,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:24:04,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:04,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:24:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:24:04,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 87 [2023-08-30 16:24:04,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:04,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:04,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 87 [2023-08-30 16:24:04,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:04,146 INFO L130 PetriNetUnfolder]: 199/407 cut-off events. [2023-08-30 16:24:04,146 INFO L131 PetriNetUnfolder]: For 131/133 co-relation queries the response was YES. [2023-08-30 16:24:04,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 407 events. 199/407 cut-off events. For 131/133 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2143 event pairs, 51 based on Foata normal form. 2/381 useless extension candidates. Maximal degree in co-relation 779. Up to 146 conditions per place. [2023-08-30 16:24:04,149 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 29 selfloop transitions, 11 changer transitions 3/50 dead transitions. [2023-08-30 16:24:04,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 253 flow [2023-08-30 16:24:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:24:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:24:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 246 transitions. [2023-08-30 16:24:04,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47126436781609193 [2023-08-30 16:24:04,151 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 246 transitions. [2023-08-30 16:24:04,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 246 transitions. [2023-08-30 16:24:04,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:04,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 246 transitions. [2023-08-30 16:24:04,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:04,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:04,170 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:04,171 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 105 flow. Second operand 6 states and 246 transitions. [2023-08-30 16:24:04,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 253 flow [2023-08-30 16:24:04,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 253 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:24:04,173 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 154 flow [2023-08-30 16:24:04,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-30 16:24:04,174 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-08-30 16:24:04,174 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 154 flow [2023-08-30 16:24:04,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:04,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:04,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:04,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:24:04,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:04,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1597826573, now seen corresponding path program 1 times [2023-08-30 16:24:04,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:04,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448760962] [2023-08-30 16:24:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:04,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:24:04,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:04,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448760962] [2023-08-30 16:24:04,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448760962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:24:04,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319408364] [2023-08-30 16:24:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:04,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:24:04,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:24:04,361 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 16:24:04,385 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 16:24:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:04,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 16:24:04,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:24:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:24:04,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:24:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:24:04,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319408364] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:24:04,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:24:04,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-30 16:24:04,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122556419] [2023-08-30 16:24:04,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:24:04,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 16:24:04,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 16:24:04,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 16:24:04,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 87 [2023-08-30 16:24:04,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 154 flow. Second operand has 15 states, 15 states have (on average 31.266666666666666) internal successors, (469), 15 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:04,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:04,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 87 [2023-08-30 16:24:04,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:05,422 INFO L130 PetriNetUnfolder]: 386/733 cut-off events. [2023-08-30 16:24:05,423 INFO L131 PetriNetUnfolder]: For 522/522 co-relation queries the response was YES. [2023-08-30 16:24:05,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1922 conditions, 733 events. 386/733 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4376 event pairs, 26 based on Foata normal form. 26/757 useless extension candidates. Maximal degree in co-relation 1816. Up to 171 conditions per place. [2023-08-30 16:24:05,427 INFO L137 encePairwiseOnDemand]: 74/87 looper letters, 56 selfloop transitions, 31 changer transitions 37/127 dead transitions. [2023-08-30 16:24:05,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 127 transitions, 683 flow [2023-08-30 16:24:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 16:24:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 16:24:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 823 transitions. [2023-08-30 16:24:05,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39415708812260536 [2023-08-30 16:24:05,430 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 823 transitions. [2023-08-30 16:24:05,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 823 transitions. [2023-08-30 16:24:05,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:05,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 823 transitions. [2023-08-30 16:24:05,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 34.291666666666664) internal successors, (823), 24 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:05,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 87.0) internal successors, (2175), 25 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:05,437 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 87.0) internal successors, (2175), 25 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:05,438 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 154 flow. Second operand 24 states and 823 transitions. [2023-08-30 16:24:05,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 127 transitions, 683 flow [2023-08-30 16:24:05,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 127 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:24:05,445 INFO L231 Difference]: Finished difference. Result has 76 places, 49 transitions, 364 flow [2023-08-30 16:24:05,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=364, PETRI_PLACES=76, PETRI_TRANSITIONS=49} [2023-08-30 16:24:05,448 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2023-08-30 16:24:05,449 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 49 transitions, 364 flow [2023-08-30 16:24:05,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 31.266666666666666) internal successors, (469), 15 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:05,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:05,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:05,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 16:24:05,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:24:05,654 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:05,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:05,655 INFO L85 PathProgramCache]: Analyzing trace with hash -45412147, now seen corresponding path program 1 times [2023-08-30 16:24:05,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:05,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151564829] [2023-08-30 16:24:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:05,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:05,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:05,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151564829] [2023-08-30 16:24:05,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151564829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:05,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:05,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:24:05,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680443707] [2023-08-30 16:24:05,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:05,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:24:05,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:24:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:24:05,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 87 [2023-08-30 16:24:05,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 49 transitions, 364 flow. Second operand has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:05,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:05,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 87 [2023-08-30 16:24:05,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:05,993 INFO L130 PetriNetUnfolder]: 247/524 cut-off events. [2023-08-30 16:24:05,994 INFO L131 PetriNetUnfolder]: For 2034/2040 co-relation queries the response was YES. [2023-08-30 16:24:05,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2220 conditions, 524 events. 247/524 cut-off events. For 2034/2040 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3148 event pairs, 64 based on Foata normal form. 12/531 useless extension candidates. Maximal degree in co-relation 2144. Up to 332 conditions per place. [2023-08-30 16:24:05,999 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 40 selfloop transitions, 13 changer transitions 6/68 dead transitions. [2023-08-30 16:24:06,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 615 flow [2023-08-30 16:24:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:24:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:24:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 266 transitions. [2023-08-30 16:24:06,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2023-08-30 16:24:06,007 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 266 transitions. [2023-08-30 16:24:06,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 266 transitions. [2023-08-30 16:24:06,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:06,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 266 transitions. [2023-08-30 16:24:06,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 38.0) internal successors, (266), 7 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,009 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,009 INFO L175 Difference]: Start difference. First operand has 76 places, 49 transitions, 364 flow. Second operand 7 states and 266 transitions. [2023-08-30 16:24:06,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 615 flow [2023-08-30 16:24:06,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 543 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-08-30 16:24:06,021 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 362 flow [2023-08-30 16:24:06,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=362, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2023-08-30 16:24:06,022 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-08-30 16:24:06,023 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 362 flow [2023-08-30 16:24:06,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:06,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:06,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:24:06,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:06,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:06,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1430133341, now seen corresponding path program 2 times [2023-08-30 16:24:06,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:06,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137173010] [2023-08-30 16:24:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:06,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:06,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:06,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137173010] [2023-08-30 16:24:06,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137173010] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:06,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:06,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:24:06,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165138612] [2023-08-30 16:24:06,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:06,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:24:06,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:06,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:24:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:24:06,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 87 [2023-08-30 16:24:06,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 362 flow. Second operand has 7 states, 7 states have (on average 33.714285714285715) internal successors, (236), 7 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:06,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 87 [2023-08-30 16:24:06,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:06,352 INFO L130 PetriNetUnfolder]: 198/437 cut-off events. [2023-08-30 16:24:06,352 INFO L131 PetriNetUnfolder]: For 1585/1591 co-relation queries the response was YES. [2023-08-30 16:24:06,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 437 events. 198/437 cut-off events. For 1585/1591 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2543 event pairs, 12 based on Foata normal form. 18/448 useless extension candidates. Maximal degree in co-relation 1676. Up to 123 conditions per place. [2023-08-30 16:24:06,355 INFO L137 encePairwiseOnDemand]: 80/87 looper letters, 17 selfloop transitions, 6 changer transitions 37/65 dead transitions. [2023-08-30 16:24:06,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 65 transitions, 544 flow [2023-08-30 16:24:06,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:24:06,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:24:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 295 transitions. [2023-08-30 16:24:06,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238505747126437 [2023-08-30 16:24:06,357 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 295 transitions. [2023-08-30 16:24:06,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 295 transitions. [2023-08-30 16:24:06,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:06,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 295 transitions. [2023-08-30 16:24:06,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 36.875) internal successors, (295), 8 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,360 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,360 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 362 flow. Second operand 8 states and 295 transitions. [2023-08-30 16:24:06,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 65 transitions, 544 flow [2023-08-30 16:24:06,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 509 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-30 16:24:06,367 INFO L231 Difference]: Finished difference. Result has 69 places, 23 transitions, 136 flow [2023-08-30 16:24:06,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=136, PETRI_PLACES=69, PETRI_TRANSITIONS=23} [2023-08-30 16:24:06,368 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2023-08-30 16:24:06,368 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 23 transitions, 136 flow [2023-08-30 16:24:06,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.714285714285715) internal successors, (236), 7 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:06,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:06,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:24:06,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:06,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:06,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2019379845, now seen corresponding path program 2 times [2023-08-30 16:24:06,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:06,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728817869] [2023-08-30 16:24:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:06,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:06,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:06,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728817869] [2023-08-30 16:24:06,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728817869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:06,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:06,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:24:06,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154248875] [2023-08-30 16:24:06,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:06,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:24:06,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:06,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:24:06,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:24:06,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 87 [2023-08-30 16:24:06,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 23 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:06,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 87 [2023-08-30 16:24:06,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:06,544 INFO L130 PetriNetUnfolder]: 40/117 cut-off events. [2023-08-30 16:24:06,545 INFO L131 PetriNetUnfolder]: For 361/363 co-relation queries the response was YES. [2023-08-30 16:24:06,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 117 events. 40/117 cut-off events. For 361/363 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 504 event pairs, 10 based on Foata normal form. 12/129 useless extension candidates. Maximal degree in co-relation 410. Up to 82 conditions per place. [2023-08-30 16:24:06,545 INFO L137 encePairwiseOnDemand]: 80/87 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2023-08-30 16:24:06,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 23 transitions, 161 flow [2023-08-30 16:24:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:24:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:24:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 212 transitions. [2023-08-30 16:24:06,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061302681992337 [2023-08-30 16:24:06,553 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 212 transitions. [2023-08-30 16:24:06,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 212 transitions. [2023-08-30 16:24:06,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:06,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 212 transitions. [2023-08-30 16:24:06,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 35.333333333333336) internal successors, (212), 6 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,555 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,555 INFO L175 Difference]: Start difference. First operand has 69 places, 23 transitions, 136 flow. Second operand 6 states and 212 transitions. [2023-08-30 16:24:06,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 23 transitions, 161 flow [2023-08-30 16:24:06,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 23 transitions, 123 flow, removed 4 selfloop flow, removed 16 redundant places. [2023-08-30 16:24:06,557 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-30 16:24:06,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-30 16:24:06,557 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2023-08-30 16:24:06,558 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-30 16:24:06,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:06,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 16:24:06,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 16:24:06,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 16:24:06,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:24:06,559 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-08-30 16:24:06,559 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 16:24:06,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:06,566 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2023-08-30 16:24:06,567 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:24:06,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 16:24:06,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:06,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:06,568 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:24:06,568 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:06,568 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:06,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-08-30 16:24:06,573 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2023-08-30 16:24:06,574 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:24:06,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 16:24:06,575 INFO L119 LiptonReduction]: Number of co-enabled transitions 1148 [2023-08-30 16:24:07,523 INFO L134 LiptonReduction]: Checked pairs total: 3716 [2023-08-30 16:24:07,523 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-08-30 16:24:07,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:24:07,525 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;@49efa9c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:24:07,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:24:07,527 INFO L130 PetriNetUnfolder]: 1/27 cut-off events. [2023-08-30 16:24:07,527 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:24:07,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:07,527 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 16:24:07,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:24:07,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:07,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1815063998, now seen corresponding path program 1 times [2023-08-30 16:24:07,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:07,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023884274] [2023-08-30 16:24:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:07,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:24:07,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:24:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:24:07,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:24:07,554 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:24:07,554 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:24:07,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:24:07,555 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:24:07,555 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:24:07,555 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:24:07,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 16:24:07,573 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:24:07,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 16:24:07,585 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2023-08-30 16:24:07,586 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:24:07,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-08-30 16:24:07,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 16:24:07,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2023-08-30 16:24:07,587 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:24:07,587 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-30 16:24:07,588 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-30 16:24:07,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 16:24:07,596 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2023-08-30 16:24:07,596 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:24:07,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-08-30 16:24:07,598 INFO L119 LiptonReduction]: Number of co-enabled transitions 2352 [2023-08-30 16:24:08,714 INFO L134 LiptonReduction]: Checked pairs total: 9027 [2023-08-30 16:24:08,714 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-30 16:24:08,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:24:08,715 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;@49efa9c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:24:08,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 16:24:08,717 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2023-08-30 16:24:08,717 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:24:08,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:08,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:08,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:08,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:08,718 INFO L85 PathProgramCache]: Analyzing trace with hash 854254949, now seen corresponding path program 1 times [2023-08-30 16:24:08,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:08,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969798515] [2023-08-30 16:24:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:08,791 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 16:24:08,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:08,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969798515] [2023-08-30 16:24:08,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969798515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:08,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:08,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:24:08,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504445693] [2023-08-30 16:24:08,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:08,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:24:08,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:08,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:24:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:24:08,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 108 [2023-08-30 16:24:08,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:08,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:08,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 108 [2023-08-30 16:24:08,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:09,298 INFO L130 PetriNetUnfolder]: 3340/4906 cut-off events. [2023-08-30 16:24:09,298 INFO L131 PetriNetUnfolder]: For 493/493 co-relation queries the response was YES. [2023-08-30 16:24:09,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10123 conditions, 4906 events. 3340/4906 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 28439 event pairs, 1049 based on Foata normal form. 44/4286 useless extension candidates. Maximal degree in co-relation 7840. Up to 2052 conditions per place. [2023-08-30 16:24:09,328 INFO L137 encePairwiseOnDemand]: 97/108 looper letters, 70 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-08-30 16:24:09,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 90 transitions, 403 flow [2023-08-30 16:24:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:24:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:24:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2023-08-30 16:24:09,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2023-08-30 16:24:09,330 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 339 transitions. [2023-08-30 16:24:09,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 339 transitions. [2023-08-30 16:24:09,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:09,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 339 transitions. [2023-08-30 16:24:09,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:09,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:09,335 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:09,335 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 93 flow. Second operand 6 states and 339 transitions. [2023-08-30 16:24:09,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 90 transitions, 403 flow [2023-08-30 16:24:09,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 90 transitions, 389 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-30 16:24:09,337 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 176 flow [2023-08-30 16:24:09,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-08-30 16:24:09,338 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-30 16:24:09,339 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 176 flow [2023-08-30 16:24:09,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:09,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:09,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:09,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:24:09,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:09,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:09,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2123306588, now seen corresponding path program 1 times [2023-08-30 16:24:09,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:09,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230454837] [2023-08-30 16:24:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:09,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:09,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:09,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230454837] [2023-08-30 16:24:09,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230454837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:09,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:09,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:24:09,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179454802] [2023-08-30 16:24:09,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:09,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:24:09,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:09,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:24:09,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:24:09,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 108 [2023-08-30 16:24:09,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:09,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:09,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 108 [2023-08-30 16:24:09,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:10,259 INFO L130 PetriNetUnfolder]: 5434/8184 cut-off events. [2023-08-30 16:24:10,259 INFO L131 PetriNetUnfolder]: For 3240/3292 co-relation queries the response was YES. [2023-08-30 16:24:10,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19123 conditions, 8184 events. 5434/8184 cut-off events. For 3240/3292 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 54686 event pairs, 1847 based on Foata normal form. 50/7370 useless extension candidates. Maximal degree in co-relation 17666. Up to 3679 conditions per place. [2023-08-30 16:24:10,310 INFO L137 encePairwiseOnDemand]: 101/108 looper letters, 75 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2023-08-30 16:24:10,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 103 transitions, 566 flow [2023-08-30 16:24:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:24:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:24:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 328 transitions. [2023-08-30 16:24:10,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2023-08-30 16:24:10,312 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 328 transitions. [2023-08-30 16:24:10,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 328 transitions. [2023-08-30 16:24:10,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:10,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 328 transitions. [2023-08-30 16:24:10,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:10,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:10,315 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:10,315 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 176 flow. Second operand 6 states and 328 transitions. [2023-08-30 16:24:10,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 103 transitions, 566 flow [2023-08-30 16:24:10,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 103 transitions, 566 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:24:10,321 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 306 flow [2023-08-30 16:24:10,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-30 16:24:10,322 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2023-08-30 16:24:10,322 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 306 flow [2023-08-30 16:24:10,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:10,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:10,322 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:10,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 16:24:10,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:10,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:10,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1876355294, now seen corresponding path program 1 times [2023-08-30 16:24:10,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:10,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326651543] [2023-08-30 16:24:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:10,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:24:10,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326651543] [2023-08-30 16:24:10,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326651543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:10,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:10,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:24:10,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359675911] [2023-08-30 16:24:10,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:10,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:24:10,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:24:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:24:10,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 108 [2023-08-30 16:24:10,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:10,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:10,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 108 [2023-08-30 16:24:10,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:11,503 INFO L130 PetriNetUnfolder]: 7395/11341 cut-off events. [2023-08-30 16:24:11,504 INFO L131 PetriNetUnfolder]: For 7972/8160 co-relation queries the response was YES. [2023-08-30 16:24:11,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28220 conditions, 11341 events. 7395/11341 cut-off events. For 7972/8160 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 81570 event pairs, 2541 based on Foata normal form. 182/10925 useless extension candidates. Maximal degree in co-relation 26538. Up to 5358 conditions per place. [2023-08-30 16:24:11,575 INFO L137 encePairwiseOnDemand]: 101/108 looper letters, 82 selfloop transitions, 27 changer transitions 0/119 dead transitions. [2023-08-30 16:24:11,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 119 transitions, 810 flow [2023-08-30 16:24:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:24:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:24:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 325 transitions. [2023-08-30 16:24:11,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015432098765432 [2023-08-30 16:24:11,578 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 325 transitions. [2023-08-30 16:24:11,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 325 transitions. [2023-08-30 16:24:11,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:11,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 325 transitions. [2023-08-30 16:24:11,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 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 16:24:11,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:11,583 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:11,583 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 306 flow. Second operand 6 states and 325 transitions. [2023-08-30 16:24:11,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 119 transitions, 810 flow [2023-08-30 16:24:11,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 119 transitions, 810 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:24:11,594 INFO L231 Difference]: Finished difference. Result has 62 places, 76 transitions, 532 flow [2023-08-30 16:24:11,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=532, PETRI_PLACES=62, PETRI_TRANSITIONS=76} [2023-08-30 16:24:11,595 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 22 predicate places. [2023-08-30 16:24:11,595 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 76 transitions, 532 flow [2023-08-30 16:24:11,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:11,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:11,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:11,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:24:11,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:11,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:11,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1008170685, now seen corresponding path program 1 times [2023-08-30 16:24:11,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:11,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277599289] [2023-08-30 16:24:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:11,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:24:11,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:11,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277599289] [2023-08-30 16:24:11,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277599289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:24:11,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805962879] [2023-08-30 16:24:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:11,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:24:11,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:24:11,785 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 16:24:11,809 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 16:24:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:11,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 16:24:11,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:24:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:24:11,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:24:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:24:12,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805962879] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:24:12,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:24:12,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-30 16:24:12,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678159879] [2023-08-30 16:24:12,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:24:12,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 16:24:12,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:12,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 16:24:12,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-08-30 16:24:12,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 108 [2023-08-30 16:24:12,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 76 transitions, 532 flow. Second operand has 15 states, 15 states have (on average 37.13333333333333) internal successors, (557), 15 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:12,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:12,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 108 [2023-08-30 16:24:12,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:16,999 INFO L130 PetriNetUnfolder]: 22329/34290 cut-off events. [2023-08-30 16:24:17,000 INFO L131 PetriNetUnfolder]: For 32487/32787 co-relation queries the response was YES. [2023-08-30 16:24:17,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90884 conditions, 34290 events. 22329/34290 cut-off events. For 32487/32787 co-relation queries the response was YES. Maximal size of possible extension queue 2855. Compared 289750 event pairs, 1936 based on Foata normal form. 2468/36713 useless extension candidates. Maximal degree in co-relation 90768. Up to 5846 conditions per place. [2023-08-30 16:24:17,205 INFO L137 encePairwiseOnDemand]: 82/108 looper letters, 441 selfloop transitions, 362 changer transitions 8/816 dead transitions. [2023-08-30 16:24:17,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 816 transitions, 5491 flow [2023-08-30 16:24:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 16:24:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 16:24:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2457 transitions. [2023-08-30 16:24:17,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2023-08-30 16:24:17,216 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2457 transitions. [2023-08-30 16:24:17,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2457 transitions. [2023-08-30 16:24:17,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:17,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2457 transitions. [2023-08-30 16:24:17,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 51.1875) internal successors, (2457), 48 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:17,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 108.0) internal successors, (5292), 49 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:17,233 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 108.0) internal successors, (5292), 49 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:17,233 INFO L175 Difference]: Start difference. First operand has 62 places, 76 transitions, 532 flow. Second operand 48 states and 2457 transitions. [2023-08-30 16:24:17,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 816 transitions, 5491 flow [2023-08-30 16:24:17,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 816 transitions, 5491 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:24:17,392 INFO L231 Difference]: Finished difference. Result has 148 places, 444 transitions, 4603 flow [2023-08-30 16:24:17,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4603, PETRI_PLACES=148, PETRI_TRANSITIONS=444} [2023-08-30 16:24:17,393 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 108 predicate places. [2023-08-30 16:24:17,393 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 444 transitions, 4603 flow [2023-08-30 16:24:17,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 37.13333333333333) internal successors, (557), 15 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:17,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:17,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:17,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 16:24:17,602 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,SelfDestructingSolverStorable12 [2023-08-30 16:24:17,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:17,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:17,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1457492301, now seen corresponding path program 1 times [2023-08-30 16:24:17,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:17,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108362304] [2023-08-30 16:24:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:17,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:17,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:17,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108362304] [2023-08-30 16:24:17,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108362304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:17,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:17,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:24:17,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992172810] [2023-08-30 16:24:17,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:17,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:24:17,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:24:17,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:24:17,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 108 [2023-08-30 16:24:17,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 444 transitions, 4603 flow. Second operand has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:17,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:17,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 108 [2023-08-30 16:24:17,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:24,019 INFO L130 PetriNetUnfolder]: 25066/39171 cut-off events. [2023-08-30 16:24:24,019 INFO L131 PetriNetUnfolder]: For 897922/900286 co-relation queries the response was YES. [2023-08-30 16:24:24,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297724 conditions, 39171 events. 25066/39171 cut-off events. For 897922/900286 co-relation queries the response was YES. Maximal size of possible extension queue 3347. Compared 343056 event pairs, 7176 based on Foata normal form. 932/39600 useless extension candidates. Maximal degree in co-relation 297540. Up to 30754 conditions per place. [2023-08-30 16:24:24,531 INFO L137 encePairwiseOnDemand]: 99/108 looper letters, 459 selfloop transitions, 79 changer transitions 1/579 dead transitions. [2023-08-30 16:24:24,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 579 transitions, 7394 flow [2023-08-30 16:24:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:24:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:24:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 418 transitions. [2023-08-30 16:24:24,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837962962962963 [2023-08-30 16:24:24,534 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 418 transitions. [2023-08-30 16:24:24,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 418 transitions. [2023-08-30 16:24:24,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:24,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 418 transitions. [2023-08-30 16:24:24,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 52.25) internal successors, (418), 8 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:24,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 108.0) internal successors, (972), 9 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:24,539 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 108.0) internal successors, (972), 9 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:24,539 INFO L175 Difference]: Start difference. First operand has 148 places, 444 transitions, 4603 flow. Second operand 8 states and 418 transitions. [2023-08-30 16:24:24,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 579 transitions, 7394 flow [2023-08-30 16:24:29,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 579 transitions, 6758 flow, removed 185 selfloop flow, removed 5 redundant places. [2023-08-30 16:24:30,007 INFO L231 Difference]: Finished difference. Result has 154 places, 497 transitions, 5017 flow [2023-08-30 16:24:30,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5017, PETRI_PLACES=154, PETRI_TRANSITIONS=497} [2023-08-30 16:24:30,008 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2023-08-30 16:24:30,008 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 497 transitions, 5017 flow [2023-08-30 16:24:30,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:30,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:30,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:30,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:24:30,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:30,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash 825955467, now seen corresponding path program 2 times [2023-08-30 16:24:30,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:30,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757320185] [2023-08-30 16:24:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:30,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:30,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:30,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757320185] [2023-08-30 16:24:30,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757320185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:30,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:30,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:24:30,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259372296] [2023-08-30 16:24:30,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:30,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:24:30,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:30,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:24:30,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:24:30,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 108 [2023-08-30 16:24:30,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 497 transitions, 5017 flow. Second operand has 7 states, 7 states have (on average 40.714285714285715) internal successors, (285), 7 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:30,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:30,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 108 [2023-08-30 16:24:30,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:36,174 INFO L130 PetriNetUnfolder]: 23435/37050 cut-off events. [2023-08-30 16:24:36,174 INFO L131 PetriNetUnfolder]: For 893280/895480 co-relation queries the response was YES. [2023-08-30 16:24:36,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281326 conditions, 37050 events. 23435/37050 cut-off events. For 893280/895480 co-relation queries the response was YES. Maximal size of possible extension queue 3236. Compared 328294 event pairs, 5053 based on Foata normal form. 1542/38022 useless extension candidates. Maximal degree in co-relation 263290. Up to 16724 conditions per place. [2023-08-30 16:24:36,803 INFO L137 encePairwiseOnDemand]: 97/108 looper letters, 421 selfloop transitions, 187 changer transitions 13/661 dead transitions. [2023-08-30 16:24:36,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 661 transitions, 7988 flow [2023-08-30 16:24:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:24:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:24:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 469 transitions. [2023-08-30 16:24:36,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825102880658436 [2023-08-30 16:24:36,806 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 469 transitions. [2023-08-30 16:24:36,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 469 transitions. [2023-08-30 16:24:36,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:36,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 469 transitions. [2023-08-30 16:24:36,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 52.111111111111114) internal successors, (469), 9 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:36,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:36,810 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:36,810 INFO L175 Difference]: Start difference. First operand has 154 places, 497 transitions, 5017 flow. Second operand 9 states and 469 transitions. [2023-08-30 16:24:36,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 661 transitions, 7988 flow [2023-08-30 16:24:41,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 661 transitions, 7960 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 16:24:41,315 INFO L231 Difference]: Finished difference. Result has 164 places, 488 transitions, 5430 flow [2023-08-30 16:24:41,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=4889, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5430, PETRI_PLACES=164, PETRI_TRANSITIONS=488} [2023-08-30 16:24:41,316 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 124 predicate places. [2023-08-30 16:24:41,316 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 488 transitions, 5430 flow [2023-08-30 16:24:41,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.714285714285715) internal successors, (285), 7 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:41,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:41,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:41,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:24:41,317 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:41,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:41,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1988625931, now seen corresponding path program 2 times [2023-08-30 16:24:41,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:41,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386973448] [2023-08-30 16:24:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:41,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:41,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:41,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386973448] [2023-08-30 16:24:41,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386973448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:41,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:24:41,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:24:41,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062705784] [2023-08-30 16:24:41,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:41,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:24:41,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:41,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:24:41,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:24:41,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 108 [2023-08-30 16:24:41,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 488 transitions, 5430 flow. Second operand has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:41,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:41,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 108 [2023-08-30 16:24:41,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:48,970 INFO L130 PetriNetUnfolder]: 28602/45419 cut-off events. [2023-08-30 16:24:48,970 INFO L131 PetriNetUnfolder]: For 1094872/1097954 co-relation queries the response was YES. [2023-08-30 16:24:49,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351583 conditions, 45419 events. 28602/45419 cut-off events. For 1094872/1097954 co-relation queries the response was YES. Maximal size of possible extension queue 4101. Compared 416989 event pairs, 8133 based on Foata normal form. 1332/46083 useless extension candidates. Maximal degree in co-relation 335402. Up to 28495 conditions per place. [2023-08-30 16:24:49,527 INFO L137 encePairwiseOnDemand]: 98/108 looper letters, 490 selfloop transitions, 161 changer transitions 5/696 dead transitions. [2023-08-30 16:24:49,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 696 transitions, 9210 flow [2023-08-30 16:24:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:24:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:24:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 411 transitions. [2023-08-30 16:24:49,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756944444444444 [2023-08-30 16:24:49,529 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 411 transitions. [2023-08-30 16:24:49,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 411 transitions. [2023-08-30 16:24:49,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:49,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 411 transitions. [2023-08-30 16:24:49,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 51.375) internal successors, (411), 8 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:49,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 108.0) internal successors, (972), 9 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:49,532 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 108.0) internal successors, (972), 9 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:49,532 INFO L175 Difference]: Start difference. First operand has 164 places, 488 transitions, 5430 flow. Second operand 8 states and 411 transitions. [2023-08-30 16:24:49,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 696 transitions, 9210 flow [2023-08-30 16:24:57,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 696 transitions, 8730 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-08-30 16:24:57,579 INFO L231 Difference]: Finished difference. Result has 169 places, 589 transitions, 7147 flow [2023-08-30 16:24:57,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=4980, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7147, PETRI_PLACES=169, PETRI_TRANSITIONS=589} [2023-08-30 16:24:57,580 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2023-08-30 16:24:57,581 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 589 transitions, 7147 flow [2023-08-30 16:24:57,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:57,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:57,581 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:57,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:24:57,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:57,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:57,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1907284990, now seen corresponding path program 1 times [2023-08-30 16:24:57,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:57,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849177322] [2023-08-30 16:24:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:57,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849177322] [2023-08-30 16:24:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849177322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:24:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57349198] [2023-08-30 16:24:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:24:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:24:57,694 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 16:24:57,697 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 16:24:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:57,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 16:24:57,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:24:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:57,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 16:24:57,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57349198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:24:57,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 16:24:57,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2023-08-30 16:24:57,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190190716] [2023-08-30 16:24:57,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:24:57,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:24:57,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:24:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:24:57,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 108 [2023-08-30 16:24:57,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 589 transitions, 7147 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:57,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:57,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 108 [2023-08-30 16:24:57,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:24:58,212 INFO L130 PetriNetUnfolder]: 1376/2612 cut-off events. [2023-08-30 16:24:58,212 INFO L131 PetriNetUnfolder]: For 63367/63545 co-relation queries the response was YES. [2023-08-30 16:24:58,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19575 conditions, 2612 events. 1376/2612 cut-off events. For 63367/63545 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 18728 event pairs, 566 based on Foata normal form. 180/2702 useless extension candidates. Maximal degree in co-relation 18136. Up to 1365 conditions per place. [2023-08-30 16:24:58,233 INFO L137 encePairwiseOnDemand]: 100/108 looper letters, 62 selfloop transitions, 24 changer transitions 0/137 dead transitions. [2023-08-30 16:24:58,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 137 transitions, 1496 flow [2023-08-30 16:24:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:24:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:24:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-08-30 16:24:58,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5493827160493827 [2023-08-30 16:24:58,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-08-30 16:24:58,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-08-30 16:24:58,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:24:58,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-08-30 16:24:58,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:58,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:58,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:58,236 INFO L175 Difference]: Start difference. First operand has 169 places, 589 transitions, 7147 flow. Second operand 3 states and 178 transitions. [2023-08-30 16:24:58,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 137 transitions, 1496 flow [2023-08-30 16:24:58,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1208 flow, removed 99 selfloop flow, removed 32 redundant places. [2023-08-30 16:24:58,342 INFO L231 Difference]: Finished difference. Result has 122 places, 117 transitions, 907 flow [2023-08-30 16:24:58,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=907, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2023-08-30 16:24:58,343 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 82 predicate places. [2023-08-30 16:24:58,343 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 907 flow [2023-08-30 16:24:58,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:58,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:24:58,343 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:24:58,351 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 16:24:58,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:24:58,548 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:24:58,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:24:58,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1438065851, now seen corresponding path program 1 times [2023-08-30 16:24:58,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:24:58,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666269281] [2023-08-30 16:24:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:58,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:24:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:58,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:24:58,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666269281] [2023-08-30 16:24:58,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666269281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:24:58,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690026906] [2023-08-30 16:24:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:24:58,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:24:58,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:24:58,662 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 16:24:58,685 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 16:24:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:24:58,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 16:24:58,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:24:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:58,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:24:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:24:58,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690026906] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:24:58,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:24:58,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-30 16:24:58,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285371628] [2023-08-30 16:24:58,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:24:58,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 16:24:58,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:24:58,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 16:24:58,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 16:24:59,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 108 [2023-08-30 16:24:59,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 907 flow. Second operand has 15 states, 15 states have (on average 37.53333333333333) internal successors, (563), 15 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:24:59,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:24:59,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 108 [2023-08-30 16:24:59,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:00,434 INFO L130 PetriNetUnfolder]: 1671/2950 cut-off events. [2023-08-30 16:25:00,434 INFO L131 PetriNetUnfolder]: For 44250/44250 co-relation queries the response was YES. [2023-08-30 16:25:00,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18927 conditions, 2950 events. 1671/2950 cut-off events. For 44250/44250 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 20960 event pairs, 114 based on Foata normal form. 50/2996 useless extension candidates. Maximal degree in co-relation 18758. Up to 1063 conditions per place. [2023-08-30 16:25:00,452 INFO L137 encePairwiseOnDemand]: 87/108 looper letters, 191 selfloop transitions, 78 changer transitions 11/289 dead transitions. [2023-08-30 16:25:00,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 289 transitions, 3751 flow [2023-08-30 16:25:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 16:25:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 16:25:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1514 transitions. [2023-08-30 16:25:00,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38940329218106995 [2023-08-30 16:25:00,455 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1514 transitions. [2023-08-30 16:25:00,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1514 transitions. [2023-08-30 16:25:00,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:00,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1514 transitions. [2023-08-30 16:25:00,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 42.05555555555556) internal successors, (1514), 36 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:00,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 108.0) internal successors, (3996), 37 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:00,463 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 108.0) internal successors, (3996), 37 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:00,463 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 907 flow. Second operand 36 states and 1514 transitions. [2023-08-30 16:25:00,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 289 transitions, 3751 flow [2023-08-30 16:25:00,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 289 transitions, 3496 flow, removed 107 selfloop flow, removed 5 redundant places. [2023-08-30 16:25:00,539 INFO L231 Difference]: Finished difference. Result has 163 places, 131 transitions, 1485 flow [2023-08-30 16:25:00,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1485, PETRI_PLACES=163, PETRI_TRANSITIONS=131} [2023-08-30 16:25:00,540 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2023-08-30 16:25:00,540 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 131 transitions, 1485 flow [2023-08-30 16:25:00,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 37.53333333333333) internal successors, (563), 15 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:00,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:00,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:00,545 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 16:25:00,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 16:25:00,741 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:00,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1828465291, now seen corresponding path program 1 times [2023-08-30 16:25:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:00,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087569363] [2023-08-30 16:25:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:00,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:25:00,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:00,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087569363] [2023-08-30 16:25:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087569363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:00,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:25:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933412276] [2023-08-30 16:25:00,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:25:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:25:00,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:25:00,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 108 [2023-08-30 16:25:00,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 131 transitions, 1485 flow. Second operand has 7 states, 7 states have (on average 40.857142857142854) internal successors, (286), 7 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:00,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:00,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 108 [2023-08-30 16:25:00,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:01,293 INFO L130 PetriNetUnfolder]: 1402/2578 cut-off events. [2023-08-30 16:25:01,293 INFO L131 PetriNetUnfolder]: For 63252/63327 co-relation queries the response was YES. [2023-08-30 16:25:01,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20199 conditions, 2578 events. 1402/2578 cut-off events. For 63252/63327 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 18066 event pairs, 449 based on Foata normal form. 64/2629 useless extension candidates. Maximal degree in co-relation 17086. Up to 1453 conditions per place. [2023-08-30 16:25:01,313 INFO L137 encePairwiseOnDemand]: 99/108 looper letters, 134 selfloop transitions, 21 changer transitions 17/195 dead transitions. [2023-08-30 16:25:01,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 195 transitions, 2724 flow [2023-08-30 16:25:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:25:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:25:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 433 transitions. [2023-08-30 16:25:01,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4454732510288066 [2023-08-30 16:25:01,314 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 433 transitions. [2023-08-30 16:25:01,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 433 transitions. [2023-08-30 16:25:01,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:01,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 433 transitions. [2023-08-30 16:25:01,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 48.111111111111114) internal successors, (433), 9 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 16:25:01,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:01,316 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:01,316 INFO L175 Difference]: Start difference. First operand has 163 places, 131 transitions, 1485 flow. Second operand 9 states and 433 transitions. [2023-08-30 16:25:01,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 195 transitions, 2724 flow [2023-08-30 16:25:01,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 195 transitions, 2376 flow, removed 135 selfloop flow, removed 12 redundant places. [2023-08-30 16:25:01,427 INFO L231 Difference]: Finished difference. Result has 161 places, 133 transitions, 1261 flow [2023-08-30 16:25:01,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1261, PETRI_PLACES=161, PETRI_TRANSITIONS=133} [2023-08-30 16:25:01,427 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2023-08-30 16:25:01,427 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 133 transitions, 1261 flow [2023-08-30 16:25:01,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.857142857142854) internal successors, (286), 7 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:01,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:01,428 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:01,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 16:25:01,428 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:01,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:01,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1783076991, now seen corresponding path program 1 times [2023-08-30 16:25:01,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:01,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071120471] [2023-08-30 16:25:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:01,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:25:01,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:01,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071120471] [2023-08-30 16:25:01,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071120471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:01,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:01,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:25:01,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351138249] [2023-08-30 16:25:01,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:01,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:25:01,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:01,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:25:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:25:01,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 108 [2023-08-30 16:25:01,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 133 transitions, 1261 flow. Second operand has 7 states, 7 states have (on average 40.857142857142854) internal successors, (286), 7 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:01,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:01,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 108 [2023-08-30 16:25:01,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:01,997 INFO L130 PetriNetUnfolder]: 1192/2202 cut-off events. [2023-08-30 16:25:01,997 INFO L131 PetriNetUnfolder]: For 56725/56728 co-relation queries the response was YES. [2023-08-30 16:25:02,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16916 conditions, 2202 events. 1192/2202 cut-off events. For 56725/56728 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 14860 event pairs, 407 based on Foata normal form. 62/2261 useless extension candidates. Maximal degree in co-relation 14487. Up to 1225 conditions per place. [2023-08-30 16:25:02,012 INFO L137 encePairwiseOnDemand]: 97/108 looper letters, 113 selfloop transitions, 18 changer transitions 20/172 dead transitions. [2023-08-30 16:25:02,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 172 transitions, 2111 flow [2023-08-30 16:25:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:25:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:25:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 428 transitions. [2023-08-30 16:25:02,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403292181069959 [2023-08-30 16:25:02,014 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 428 transitions. [2023-08-30 16:25:02,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 428 transitions. [2023-08-30 16:25:02,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:02,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 428 transitions. [2023-08-30 16:25:02,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 47.55555555555556) internal successors, (428), 9 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:02,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:02,016 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:02,016 INFO L175 Difference]: Start difference. First operand has 161 places, 133 transitions, 1261 flow. Second operand 9 states and 428 transitions. [2023-08-30 16:25:02,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 172 transitions, 2111 flow [2023-08-30 16:25:02,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 172 transitions, 2068 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-30 16:25:02,088 INFO L231 Difference]: Finished difference. Result has 166 places, 115 transitions, 1071 flow [2023-08-30 16:25:02,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1071, PETRI_PLACES=166, PETRI_TRANSITIONS=115} [2023-08-30 16:25:02,089 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2023-08-30 16:25:02,089 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 115 transitions, 1071 flow [2023-08-30 16:25:02,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.857142857142854) internal successors, (286), 7 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:02,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:02,090 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:02,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 16:25:02,090 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:02,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:02,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1784493071, now seen corresponding path program 1 times [2023-08-30 16:25:02,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:02,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579101578] [2023-08-30 16:25:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:02,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:25:02,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:02,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579101578] [2023-08-30 16:25:02,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579101578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:02,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:02,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:25:02,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369230464] [2023-08-30 16:25:02,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:02,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:25:02,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:02,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:25:02,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:25:02,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 108 [2023-08-30 16:25:02,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 115 transitions, 1071 flow. Second operand has 7 states, 7 states have (on average 40.857142857142854) internal successors, (286), 7 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:02,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:02,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 108 [2023-08-30 16:25:02,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:02,594 INFO L130 PetriNetUnfolder]: 1041/1939 cut-off events. [2023-08-30 16:25:02,594 INFO L131 PetriNetUnfolder]: For 49039/49047 co-relation queries the response was YES. [2023-08-30 16:25:02,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15071 conditions, 1939 events. 1041/1939 cut-off events. For 49039/49047 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 12689 event pairs, 381 based on Foata normal form. 18/1948 useless extension candidates. Maximal degree in co-relation 12587. Up to 1141 conditions per place. [2023-08-30 16:25:02,608 INFO L137 encePairwiseOnDemand]: 100/108 looper letters, 114 selfloop transitions, 19 changer transitions 2/156 dead transitions. [2023-08-30 16:25:02,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 156 transitions, 1868 flow [2023-08-30 16:25:02,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:25:02,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:25:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 421 transitions. [2023-08-30 16:25:02,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331275720164609 [2023-08-30 16:25:02,610 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 421 transitions. [2023-08-30 16:25:02,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 421 transitions. [2023-08-30 16:25:02,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:02,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 421 transitions. [2023-08-30 16:25:02,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 46.77777777777778) internal successors, (421), 9 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:02,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:02,612 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:02,612 INFO L175 Difference]: Start difference. First operand has 166 places, 115 transitions, 1071 flow. Second operand 9 states and 421 transitions. [2023-08-30 16:25:02,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 156 transitions, 1868 flow [2023-08-30 16:25:02,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 156 transitions, 1807 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-30 16:25:02,667 INFO L231 Difference]: Finished difference. Result has 168 places, 115 transitions, 1057 flow [2023-08-30 16:25:02,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1057, PETRI_PLACES=168, PETRI_TRANSITIONS=115} [2023-08-30 16:25:02,667 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 128 predicate places. [2023-08-30 16:25:02,667 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 115 transitions, 1057 flow [2023-08-30 16:25:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.857142857142854) internal successors, (286), 7 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:02,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:02,668 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:02,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 16:25:02,668 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:02,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:02,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1571690672, now seen corresponding path program 1 times [2023-08-30 16:25:02,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:02,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766436013] [2023-08-30 16:25:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:02,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:02,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:02,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766436013] [2023-08-30 16:25:02,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766436013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:25:02,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269951878] [2023-08-30 16:25:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:02,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:25:02,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:25:02,811 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 16:25:02,834 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 16:25:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:02,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 16:25:02,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:25:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:03,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:25:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:03,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269951878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:25:03,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:25:03,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2023-08-30 16:25:03,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632239888] [2023-08-30 16:25:03,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:25:03,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 16:25:03,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 16:25:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-08-30 16:25:03,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 108 [2023-08-30 16:25:03,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 115 transitions, 1057 flow. Second operand has 22 states, 22 states have (on average 35.22727272727273) internal successors, (775), 22 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:03,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:03,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 108 [2023-08-30 16:25:03,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:06,513 INFO L130 PetriNetUnfolder]: 1202/2261 cut-off events. [2023-08-30 16:25:06,513 INFO L131 PetriNetUnfolder]: For 50599/50599 co-relation queries the response was YES. [2023-08-30 16:25:06,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17515 conditions, 2261 events. 1202/2261 cut-off events. For 50599/50599 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 15847 event pairs, 63 based on Foata normal form. 36/2295 useless extension candidates. Maximal degree in co-relation 15365. Up to 887 conditions per place. [2023-08-30 16:25:06,529 INFO L137 encePairwiseOnDemand]: 88/108 looper letters, 184 selfloop transitions, 95 changer transitions 64/346 dead transitions. [2023-08-30 16:25:06,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 346 transitions, 5146 flow [2023-08-30 16:25:06,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 16:25:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 16:25:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2129 transitions. [2023-08-30 16:25:06,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35201719576719576 [2023-08-30 16:25:06,532 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2129 transitions. [2023-08-30 16:25:06,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2129 transitions. [2023-08-30 16:25:06,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:06,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2129 transitions. [2023-08-30 16:25:06,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 38.017857142857146) internal successors, (2129), 56 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:06,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 108.0) internal successors, (6156), 57 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:06,544 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 108.0) internal successors, (6156), 57 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:06,544 INFO L175 Difference]: Start difference. First operand has 168 places, 115 transitions, 1057 flow. Second operand 56 states and 2129 transitions. [2023-08-30 16:25:06,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 346 transitions, 5146 flow [2023-08-30 16:25:06,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 346 transitions, 4966 flow, removed 74 selfloop flow, removed 7 redundant places. [2023-08-30 16:25:06,636 INFO L231 Difference]: Finished difference. Result has 228 places, 158 transitions, 2351 flow [2023-08-30 16:25:06,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2351, PETRI_PLACES=228, PETRI_TRANSITIONS=158} [2023-08-30 16:25:06,637 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 188 predicate places. [2023-08-30 16:25:06,637 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 158 transitions, 2351 flow [2023-08-30 16:25:06,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.22727272727273) internal successors, (775), 22 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:06,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:06,638 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:06,644 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 16:25:06,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 16:25:06,844 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:06,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1526302372, now seen corresponding path program 1 times [2023-08-30 16:25:06,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:06,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238370217] [2023-08-30 16:25:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:06,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:06,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:06,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238370217] [2023-08-30 16:25:06,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238370217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:25:06,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303972514] [2023-08-30 16:25:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:06,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:25:06,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:25:06,989 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 16:25:06,997 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 16:25:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:07,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 16:25:07,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:25:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:07,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:25:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:07,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303972514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:25:07,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:25:07,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2023-08-30 16:25:07,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126215359] [2023-08-30 16:25:07,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:25:07,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 16:25:07,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 16:25:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-08-30 16:25:07,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 108 [2023-08-30 16:25:07,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 158 transitions, 2351 flow. Second operand has 22 states, 22 states have (on average 35.22727272727273) internal successors, (775), 22 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:07,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:07,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 108 [2023-08-30 16:25:07,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:10,157 INFO L130 PetriNetUnfolder]: 1080/2169 cut-off events. [2023-08-30 16:25:10,157 INFO L131 PetriNetUnfolder]: For 64404/64404 co-relation queries the response was YES. [2023-08-30 16:25:10,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19033 conditions, 2169 events. 1080/2169 cut-off events. For 64404/64404 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 16112 event pairs, 54 based on Foata normal form. 36/2204 useless extension candidates. Maximal degree in co-relation 18616. Up to 881 conditions per place. [2023-08-30 16:25:10,175 INFO L137 encePairwiseOnDemand]: 88/108 looper letters, 154 selfloop transitions, 109 changer transitions 85/351 dead transitions. [2023-08-30 16:25:10,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 351 transitions, 6394 flow [2023-08-30 16:25:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 16:25:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 16:25:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2000 transitions. [2023-08-30 16:25:10,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494060097833683 [2023-08-30 16:25:10,178 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2000 transitions. [2023-08-30 16:25:10,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2000 transitions. [2023-08-30 16:25:10,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:10,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2000 transitions. [2023-08-30 16:25:10,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 37.735849056603776) internal successors, (2000), 53 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:10,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 108.0) internal successors, (5832), 54 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:10,187 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 108.0) internal successors, (5832), 54 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:10,187 INFO L175 Difference]: Start difference. First operand has 228 places, 158 transitions, 2351 flow. Second operand 53 states and 2000 transitions. [2023-08-30 16:25:10,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 351 transitions, 6394 flow [2023-08-30 16:25:10,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 351 transitions, 4665 flow, removed 816 selfloop flow, removed 26 redundant places. [2023-08-30 16:25:10,376 INFO L231 Difference]: Finished difference. Result has 250 places, 180 transitions, 2495 flow [2023-08-30 16:25:10,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=2495, PETRI_PLACES=250, PETRI_TRANSITIONS=180} [2023-08-30 16:25:10,376 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 210 predicate places. [2023-08-30 16:25:10,376 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 180 transitions, 2495 flow [2023-08-30 16:25:10,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.22727272727273) internal successors, (775), 22 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:10,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:10,377 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:10,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 16:25:10,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:25:10,581 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:10,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:10,581 INFO L85 PathProgramCache]: Analyzing trace with hash 358733058, now seen corresponding path program 2 times [2023-08-30 16:25:10,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:10,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401054382] [2023-08-30 16:25:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:10,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:25:10,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:10,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401054382] [2023-08-30 16:25:10,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401054382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:25:10,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306039106] [2023-08-30 16:25:10,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:25:10,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:25:10,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:25:10,716 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 16:25:10,718 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 16:25:10,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 16:25:10,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:25:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 16:25:10,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:25:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:25:10,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:25:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:25:11,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306039106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:25:11,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:25:11,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-08-30 16:25:11,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771740630] [2023-08-30 16:25:11,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:25:11,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 16:25:11,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 16:25:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-08-30 16:25:11,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 108 [2023-08-30 16:25:11,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 180 transitions, 2495 flow. Second operand has 19 states, 19 states have (on average 35.473684210526315) internal successors, (674), 19 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:11,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:11,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 108 [2023-08-30 16:25:11,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:12,458 INFO L130 PetriNetUnfolder]: 804/1671 cut-off events. [2023-08-30 16:25:12,458 INFO L131 PetriNetUnfolder]: For 32706/32706 co-relation queries the response was YES. [2023-08-30 16:25:12,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12770 conditions, 1671 events. 804/1671 cut-off events. For 32706/32706 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 12454 event pairs, 96 based on Foata normal form. 80/1751 useless extension candidates. Maximal degree in co-relation 12699. Up to 605 conditions per place. [2023-08-30 16:25:12,472 INFO L137 encePairwiseOnDemand]: 91/108 looper letters, 115 selfloop transitions, 77 changer transitions 82/277 dead transitions. [2023-08-30 16:25:12,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 277 transitions, 4454 flow [2023-08-30 16:25:12,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 16:25:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 16:25:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1325 transitions. [2023-08-30 16:25:12,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3505291005291005 [2023-08-30 16:25:12,481 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1325 transitions. [2023-08-30 16:25:12,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1325 transitions. [2023-08-30 16:25:12,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:12,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1325 transitions. [2023-08-30 16:25:12,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 37.857142857142854) internal successors, (1325), 35 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:12,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 108.0) internal successors, (3888), 36 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:12,488 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 108.0) internal successors, (3888), 36 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:12,489 INFO L175 Difference]: Start difference. First operand has 250 places, 180 transitions, 2495 flow. Second operand 35 states and 1325 transitions. [2023-08-30 16:25:12,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 277 transitions, 4454 flow [2023-08-30 16:25:12,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 277 transitions, 3433 flow, removed 405 selfloop flow, removed 28 redundant places. [2023-08-30 16:25:12,611 INFO L231 Difference]: Finished difference. Result has 230 places, 158 transitions, 2009 flow [2023-08-30 16:25:12,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2009, PETRI_PLACES=230, PETRI_TRANSITIONS=158} [2023-08-30 16:25:12,611 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 190 predicate places. [2023-08-30 16:25:12,611 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 158 transitions, 2009 flow [2023-08-30 16:25:12,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 35.473684210526315) internal successors, (674), 19 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:12,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:12,612 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:12,616 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 16:25:12,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:25:12,812 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:12,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:12,813 INFO L85 PathProgramCache]: Analyzing trace with hash -256272184, now seen corresponding path program 1 times [2023-08-30 16:25:12,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:12,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837386185] [2023-08-30 16:25:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:12,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:25:12,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:12,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837386185] [2023-08-30 16:25:12,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837386185] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:25:12,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422332286] [2023-08-30 16:25:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:12,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:25:12,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:25:12,961 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 16:25:12,962 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 16:25:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 16:25:13,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:25:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:25:13,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:25:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:25:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422332286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:25:13,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:25:13,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2023-08-30 16:25:13,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088475011] [2023-08-30 16:25:13,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:25:13,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 16:25:13,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 16:25:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-30 16:25:13,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 108 [2023-08-30 16:25:13,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 158 transitions, 2009 flow. Second operand has 22 states, 22 states have (on average 35.18181818181818) internal successors, (774), 22 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:13,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:13,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 108 [2023-08-30 16:25:13,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:15,968 INFO L130 PetriNetUnfolder]: 467/1047 cut-off events. [2023-08-30 16:25:15,968 INFO L131 PetriNetUnfolder]: For 12670/12670 co-relation queries the response was YES. [2023-08-30 16:25:15,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6821 conditions, 1047 events. 467/1047 cut-off events. For 12670/12670 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7562 event pairs, 6 based on Foata normal form. 34/1081 useless extension candidates. Maximal degree in co-relation 6762. Up to 365 conditions per place. [2023-08-30 16:25:15,974 INFO L137 encePairwiseOnDemand]: 88/108 looper letters, 75 selfloop transitions, 66 changer transitions 102/246 dead transitions. [2023-08-30 16:25:15,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 246 transitions, 3211 flow [2023-08-30 16:25:15,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 16:25:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 16:25:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1695 transitions. [2023-08-30 16:25:15,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34118357487922707 [2023-08-30 16:25:15,977 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1695 transitions. [2023-08-30 16:25:15,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1695 transitions. [2023-08-30 16:25:15,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:15,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1695 transitions. [2023-08-30 16:25:15,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 36.84782608695652) internal successors, (1695), 46 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:15,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 108.0) internal successors, (5076), 47 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:15,983 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 108.0) internal successors, (5076), 47 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:15,983 INFO L175 Difference]: Start difference. First operand has 230 places, 158 transitions, 2009 flow. Second operand 46 states and 1695 transitions. [2023-08-30 16:25:15,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 246 transitions, 3211 flow [2023-08-30 16:25:16,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 246 transitions, 2776 flow, removed 168 selfloop flow, removed 28 redundant places. [2023-08-30 16:25:16,019 INFO L231 Difference]: Finished difference. Result has 207 places, 104 transitions, 1203 flow [2023-08-30 16:25:16,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1203, PETRI_PLACES=207, PETRI_TRANSITIONS=104} [2023-08-30 16:25:16,020 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 167 predicate places. [2023-08-30 16:25:16,020 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 104 transitions, 1203 flow [2023-08-30 16:25:16,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 35.18181818181818) internal successors, (774), 22 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:16,020 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:16,027 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 16:25:16,220 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,SelfDestructingSolverStorable24 [2023-08-30 16:25:16,221 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:16,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1838268712, now seen corresponding path program 1 times [2023-08-30 16:25:16,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:16,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694583457] [2023-08-30 16:25:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:25:16,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:16,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694583457] [2023-08-30 16:25:16,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694583457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:16,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:16,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:25:16,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729761003] [2023-08-30 16:25:16,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:16,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 16:25:16,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:16,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 16:25:16,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-08-30 16:25:16,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 108 [2023-08-30 16:25:16,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 104 transitions, 1203 flow. Second operand has 9 states, 9 states have (on average 38.888888888888886) internal successors, (350), 9 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:16,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 108 [2023-08-30 16:25:16,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:16,623 INFO L130 PetriNetUnfolder]: 181/468 cut-off events. [2023-08-30 16:25:16,623 INFO L131 PetriNetUnfolder]: For 4025/4025 co-relation queries the response was YES. [2023-08-30 16:25:16,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 468 events. 181/468 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2961 event pairs, 12 based on Foata normal form. 40/508 useless extension candidates. Maximal degree in co-relation 2751. Up to 141 conditions per place. [2023-08-30 16:25:16,625 INFO L137 encePairwiseOnDemand]: 99/108 looper letters, 29 selfloop transitions, 4 changer transitions 55/95 dead transitions. [2023-08-30 16:25:16,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 95 transitions, 1175 flow [2023-08-30 16:25:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 16:25:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 16:25:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 416 transitions. [2023-08-30 16:25:16,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2023-08-30 16:25:16,626 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 416 transitions. [2023-08-30 16:25:16,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 416 transitions. [2023-08-30 16:25:16,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:16,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 416 transitions. [2023-08-30 16:25:16,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 41.6) internal successors, (416), 10 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 108.0) internal successors, (1188), 11 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,628 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 108.0) internal successors, (1188), 11 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,629 INFO L175 Difference]: Start difference. First operand has 207 places, 104 transitions, 1203 flow. Second operand 10 states and 416 transitions. [2023-08-30 16:25:16,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 95 transitions, 1175 flow [2023-08-30 16:25:16,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 95 transitions, 845 flow, removed 71 selfloop flow, removed 51 redundant places. [2023-08-30 16:25:16,637 INFO L231 Difference]: Finished difference. Result has 121 places, 37 transitions, 236 flow [2023-08-30 16:25:16,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=236, PETRI_PLACES=121, PETRI_TRANSITIONS=37} [2023-08-30 16:25:16,638 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 81 predicate places. [2023-08-30 16:25:16,638 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 37 transitions, 236 flow [2023-08-30 16:25:16,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 38.888888888888886) internal successors, (350), 9 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:16,638 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:16,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 16:25:16,638 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:25:16,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:16,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1887081670, now seen corresponding path program 2 times [2023-08-30 16:25:16,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:16,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859153807] [2023-08-30 16:25:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:16,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:25:16,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:16,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859153807] [2023-08-30 16:25:16,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859153807] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:16,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:16,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:25:16,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941180421] [2023-08-30 16:25:16,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:16,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 16:25:16,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:16,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 16:25:16,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-30 16:25:16,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 108 [2023-08-30 16:25:16,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 37 transitions, 236 flow. Second operand has 9 states, 9 states have (on average 38.888888888888886) internal successors, (350), 9 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:16,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 108 [2023-08-30 16:25:16,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:16,958 INFO L130 PetriNetUnfolder]: 27/94 cut-off events. [2023-08-30 16:25:16,958 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-08-30 16:25:16,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 94 events. 27/94 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 272 event pairs, 0 based on Foata normal form. 12/106 useless extension candidates. Maximal degree in co-relation 341. Up to 25 conditions per place. [2023-08-30 16:25:16,959 INFO L137 encePairwiseOnDemand]: 100/108 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-30 16:25:16,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 37 transitions, 266 flow [2023-08-30 16:25:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:25:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:25:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 360 transitions. [2023-08-30 16:25:16,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-08-30 16:25:16,960 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 360 transitions. [2023-08-30 16:25:16,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 360 transitions. [2023-08-30 16:25:16,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:16,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 360 transitions. [2023-08-30 16:25:16,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 40.0) internal successors, (360), 9 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,962 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,962 INFO L175 Difference]: Start difference. First operand has 121 places, 37 transitions, 236 flow. Second operand 9 states and 360 transitions. [2023-08-30 16:25:16,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 37 transitions, 266 flow [2023-08-30 16:25:16,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 37 transitions, 171 flow, removed 14 selfloop flow, removed 28 redundant places. [2023-08-30 16:25:16,963 INFO L231 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2023-08-30 16:25:16,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2023-08-30 16:25:16,964 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 18 predicate places. [2023-08-30 16:25:16,964 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2023-08-30 16:25:16,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 38.888888888888886) internal successors, (350), 9 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:16,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 16:25:16,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 16:25:16,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 16:25:16,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 16:25:16,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 16:25:16,965 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:16,967 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:25:16,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 16:25:16,974 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2023-08-30 16:25:16,974 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:25:16,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-08-30 16:25:16,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 16:25:16,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2023-08-30 16:25:16,975 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:25:16,975 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-30 16:25:16,976 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 70 transitions, 161 flow [2023-08-30 16:25:16,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-08-30 16:25:16,981 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2023-08-30 16:25:16,982 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:25:16,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-08-30 16:25:16,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 2352 [2023-08-30 16:25:18,066 INFO L134 LiptonReduction]: Checked pairs total: 10314 [2023-08-30 16:25:18,067 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-30 16:25:18,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:25:18,068 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;@49efa9c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:25:18,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:25:18,071 INFO L130 PetriNetUnfolder]: 2/41 cut-off events. [2023-08-30 16:25:18,071 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:25:18,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:18,072 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 16:25:18,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:25:18,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:18,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1020814011, now seen corresponding path program 1 times [2023-08-30 16:25:18,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:18,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097900011] [2023-08-30 16:25:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:18,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:25:18,080 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:25:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:25:18,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:25:18,086 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:25:18,086 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:25:18,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 16:25:18,087 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:25:18,087 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:25:18,087 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:25:18,087 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 16:25:18,102 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:25:18,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2023-08-30 16:25:18,111 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2023-08-30 16:25:18,111 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:25:18,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-30 16:25:18,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 85 transitions, 202 flow [2023-08-30 16:25:18,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 85 transitions, 202 flow [2023-08-30 16:25:18,112 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:25:18,113 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 85 transitions, 202 flow [2023-08-30 16:25:18,113 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 85 transitions, 202 flow [2023-08-30 16:25:18,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2023-08-30 16:25:18,120 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2023-08-30 16:25:18,121 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:25:18,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-08-30 16:25:18,123 INFO L119 LiptonReduction]: Number of co-enabled transitions 3976 [2023-08-30 16:25:19,331 INFO L134 LiptonReduction]: Checked pairs total: 15362 [2023-08-30 16:25:19,332 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-08-30 16:25:19,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:25:19,335 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;@49efa9c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:25:19,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 16:25:19,337 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2023-08-30 16:25:19,338 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:25:19,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:19,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:19,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:25:19,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash -515549524, now seen corresponding path program 1 times [2023-08-30 16:25:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:19,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813100234] [2023-08-30 16:25:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:19,393 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 16:25:19,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:19,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813100234] [2023-08-30 16:25:19,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813100234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:19,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:19,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:25:19,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941464436] [2023-08-30 16:25:19,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:19,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:19,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:19,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 129 [2023-08-30 16:25:19,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 49.6) internal successors, (248), 5 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:19,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:19,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 129 [2023-08-30 16:25:19,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:21,795 INFO L130 PetriNetUnfolder]: 38126/50056 cut-off events. [2023-08-30 16:25:21,796 INFO L131 PetriNetUnfolder]: For 7293/7293 co-relation queries the response was YES. [2023-08-30 16:25:21,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103787 conditions, 50056 events. 38126/50056 cut-off events. For 7293/7293 co-relation queries the response was YES. Maximal size of possible extension queue 2574. Compared 300728 event pairs, 13503 based on Foata normal form. 132/43551 useless extension candidates. Maximal degree in co-relation 67090. Up to 22160 conditions per place. [2023-08-30 16:25:22,132 INFO L137 encePairwiseOnDemand]: 116/129 looper letters, 97 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2023-08-30 16:25:22,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 122 transitions, 574 flow [2023-08-30 16:25:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:25:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:25:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 413 transitions. [2023-08-30 16:25:22,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335917312661499 [2023-08-30 16:25:22,133 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 413 transitions. [2023-08-30 16:25:22,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 413 transitions. [2023-08-30 16:25:22,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:22,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 413 transitions. [2023-08-30 16:25:22,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:22,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:22,135 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:22,135 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 124 flow. Second operand 6 states and 413 transitions. [2023-08-30 16:25:22,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 122 transitions, 574 flow [2023-08-30 16:25:22,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 122 transitions, 538 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:22,139 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 228 flow [2023-08-30 16:25:22,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-30 16:25:22,139 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-08-30 16:25:22,139 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 228 flow [2023-08-30 16:25:22,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.6) internal successors, (248), 5 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:22,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:22,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:22,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 16:25:22,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:25:22,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:22,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2036297261, now seen corresponding path program 1 times [2023-08-30 16:25:22,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:22,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112363048] [2023-08-30 16:25:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:22,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:25:22,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:22,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112363048] [2023-08-30 16:25:22,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112363048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:22,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:22,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:25:22,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232611813] [2023-08-30 16:25:22,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:22,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:22,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:22,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 129 [2023-08-30 16:25:22,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:22,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:22,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 129 [2023-08-30 16:25:22,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:28,970 INFO L130 PetriNetUnfolder]: 72724/96946 cut-off events. [2023-08-30 16:25:28,971 INFO L131 PetriNetUnfolder]: For 44681/45129 co-relation queries the response was YES. [2023-08-30 16:25:29,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231613 conditions, 96946 events. 72724/96946 cut-off events. For 44681/45129 co-relation queries the response was YES. Maximal size of possible extension queue 5143. Compared 659878 event pairs, 26615 based on Foata normal form. 426/86754 useless extension candidates. Maximal degree in co-relation 215542. Up to 44665 conditions per place. [2023-08-30 16:25:29,478 INFO L137 encePairwiseOnDemand]: 121/129 looper letters, 108 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2023-08-30 16:25:29,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 144 transitions, 801 flow [2023-08-30 16:25:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:25:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:25:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 400 transitions. [2023-08-30 16:25:29,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167958656330749 [2023-08-30 16:25:29,479 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 400 transitions. [2023-08-30 16:25:29,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 400 transitions. [2023-08-30 16:25:29,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:29,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 400 transitions. [2023-08-30 16:25:29,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:29,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:29,482 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:29,482 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 228 flow. Second operand 6 states and 400 transitions. [2023-08-30 16:25:29,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 144 transitions, 801 flow [2023-08-30 16:25:29,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 144 transitions, 801 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:29,517 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 399 flow [2023-08-30 16:25:29,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-08-30 16:25:29,518 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-30 16:25:29,518 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 399 flow [2023-08-30 16:25:29,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:29,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:29,518 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:29,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 16:25:29,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:25:29,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash -312889096, now seen corresponding path program 1 times [2023-08-30 16:25:29,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:29,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951377214] [2023-08-30 16:25:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:29,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 16:25:29,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:29,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951377214] [2023-08-30 16:25:29,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951377214] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:25:29,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:25:29,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:25:29,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299353596] [2023-08-30 16:25:29,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:25:29,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:25:29,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:29,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:25:29,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:25:29,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 129 [2023-08-30 16:25:29,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:29,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:29,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 129 [2023-08-30 16:25:29,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:25:40,279 INFO L130 PetriNetUnfolder]: 123863/167541 cut-off events. [2023-08-30 16:25:40,279 INFO L131 PetriNetUnfolder]: For 130361/133401 co-relation queries the response was YES. [2023-08-30 16:25:40,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425195 conditions, 167541 events. 123863/167541 cut-off events. For 130361/133401 co-relation queries the response was YES. Maximal size of possible extension queue 9040. Compared 1261678 event pairs, 44995 based on Foata normal form. 2956/157399 useless extension candidates. Maximal degree in co-relation 397851. Up to 80186 conditions per place. [2023-08-30 16:25:41,215 INFO L137 encePairwiseOnDemand]: 121/129 looper letters, 121 selfloop transitions, 37 changer transitions 0/170 dead transitions. [2023-08-30 16:25:41,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 170 transitions, 1171 flow [2023-08-30 16:25:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:25:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:25:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 397 transitions. [2023-08-30 16:25:41,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5129198966408268 [2023-08-30 16:25:41,216 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 397 transitions. [2023-08-30 16:25:41,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 397 transitions. [2023-08-30 16:25:41,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:25:41,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 397 transitions. [2023-08-30 16:25:41,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.16666666666667) internal successors, (397), 6 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:41,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:41,218 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:41,218 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 399 flow. Second operand 6 states and 397 transitions. [2023-08-30 16:25:41,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 170 transitions, 1171 flow [2023-08-30 16:25:41,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 170 transitions, 1171 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:25:41,349 INFO L231 Difference]: Finished difference. Result has 73 places, 100 transitions, 701 flow [2023-08-30 16:25:41,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=701, PETRI_PLACES=73, PETRI_TRANSITIONS=100} [2023-08-30 16:25:41,349 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-08-30 16:25:41,349 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 100 transitions, 701 flow [2023-08-30 16:25:41,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:41,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:25:41,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:25:41,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 16:25:41,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:25:41,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:25:41,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1764210812, now seen corresponding path program 1 times [2023-08-30 16:25:41,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:25:41,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371521218] [2023-08-30 16:25:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:41,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:25:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:25:41,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:25:41,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371521218] [2023-08-30 16:25:41,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371521218] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:25:41,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047046210] [2023-08-30 16:25:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:25:41,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:25:41,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:25:41,437 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 16:25:41,439 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 16:25:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:25:41,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 16:25:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:25:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:25:41,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:25:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:25:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047046210] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:25:41,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:25:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-08-30 16:25:41,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273381155] [2023-08-30 16:25:41,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:25:41,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 16:25:41,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:25:41,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 16:25:41,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 16:25:41,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-08-30 16:25:41,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 100 transitions, 701 flow. Second operand has 15 states, 15 states have (on average 43.266666666666666) internal successors, (649), 15 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:25:41,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:25:41,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-08-30 16:25:41,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand