./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.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/45_monabsex1_vs.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 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 --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 16:37:43,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:37:43,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:37:44,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:37:44,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:37:44,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:37:44,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:37:44,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:37:44,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:37:44,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:37:44,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:37:44,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:37:44,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:37:44,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:37:44,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:37:44,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:37:44,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:37:44,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:37:44,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:37:44,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:37:44,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:37:44,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:37:44,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:37:44,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:37:44,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:37:44,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:37:44,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:37:44,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:37:44,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:37:44,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:37:44,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:37:44,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:37:44,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:37:44,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:37:44,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:37:44,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:37:44,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:37:44,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:37:44,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:37:44,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:37:44,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:37:44,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:37:44,138 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:37:44,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:37:44,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:37:44,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:37:44,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:37:44,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:37:44,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:37:44,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:37:44,142 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:37:44,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:37:44,143 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:37:44,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:37:44,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:37:44,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:37:44,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:37:44,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:37:44,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:37:44,145 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:37:44,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:37:44,145 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:37:44,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:37:44,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:37:44,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:37:44,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:37:44,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:37:44,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:37:44,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:37:44,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:37:44,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:37:44,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:37:44,147 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:37:44,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:37:44,148 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:37:44,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:37:44,148 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:37:44,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:37:44,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:37:44,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:37:44,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:37:44,454 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:37:44,454 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:37:44,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-08-30 16:37:45,674 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:37:45,964 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:37:45,967 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/45_monabsex1_vs.i [2023-08-30 16:37:45,977 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2217ac9d1/410149feab174800a6e37eecbdfd10de/FLAG2ba4fde02 [2023-08-30 16:37:45,987 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2217ac9d1/410149feab174800a6e37eecbdfd10de [2023-08-30 16:37:45,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:37:45,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:37:45,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:37:45,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:37:45,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:37:45,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:37:45" (1/1) ... [2023-08-30 16:37:45,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e7fa64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:45, skipping insertion in model container [2023-08-30 16:37:45,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:37:45" (1/1) ... [2023-08-30 16:37:46,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:37:46,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:37:46,175 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 16:37:46,265 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/45_monabsex1_vs.i[30633,30646] [2023-08-30 16:37:46,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:37:46,287 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:37:46,310 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 16:37:46,347 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/45_monabsex1_vs.i[30633,30646] [2023-08-30 16:37:46,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:37:46,432 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:37:46,432 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:37:46,432 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:37:46,438 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:37:46,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46 WrapperNode [2023-08-30 16:37:46,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:37:46,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:37:46,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:37:46,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:37:46,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,476 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-08-30 16:37:46,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:37:46,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:37:46,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:37:46,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:37:46,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,515 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:37:46,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:37:46,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:37:46,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:37:46,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (1/1) ... [2023-08-30 16:37:46,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:37:46,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:37:46,546 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 16:37:46,548 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 16:37:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:37:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:37:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:37:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 16:37:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:37:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:37:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:37:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:37:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 16:37:46,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:37:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:37:46,573 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 16:37:46,667 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:37:46,669 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:37:46,803 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:37:46,815 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:37:46,820 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 16:37:46,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:37:46 BoogieIcfgContainer [2023-08-30 16:37:46,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:37:46,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:37:46,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:37:46,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:37:46,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:37:45" (1/3) ... [2023-08-30 16:37:46,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d94b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:37:46, skipping insertion in model container [2023-08-30 16:37:46,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:46" (2/3) ... [2023-08-30 16:37:46,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d94b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:37:46, skipping insertion in model container [2023-08-30 16:37:46,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:37:46" (3/3) ... [2023-08-30 16:37:46,842 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2023-08-30 16:37:46,857 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:37:46,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:37:46,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:37:46,864 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:37:46,911 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:37:46,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 85 flow [2023-08-30 16:37:46,962 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2023-08-30 16:37:46,962 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:46,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 2/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-08-30 16:37:46,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 40 transitions, 85 flow [2023-08-30 16:37:46,973 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2023-08-30 16:37:46,976 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:46,986 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 40 transitions, 85 flow [2023-08-30 16:37:46,988 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 40 transitions, 85 flow [2023-08-30 16:37:46,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 85 flow [2023-08-30 16:37:47,001 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2023-08-30 16:37:47,001 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:47,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 2/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-08-30 16:37:47,002 INFO L119 LiptonReduction]: Number of co-enabled transitions 286 [2023-08-30 16:37:47,953 INFO L134 LiptonReduction]: Checked pairs total: 243 [2023-08-30 16:37:47,954 INFO L136 LiptonReduction]: Total number of compositions: 37 [2023-08-30 16:37:47,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:37:47,974 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:47,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:37:47,978 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:37:47,978 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:47,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:47,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:37:47,979 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:47,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash 5500569, now seen corresponding path program 1 times [2023-08-30 16:37:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:47,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874877723] [2023-08-30 16:37:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:47,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:48,151 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 16:37:48,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:48,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874877723] [2023-08-30 16:37:48,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874877723] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:48,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:48,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:37:48,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178120521] [2023-08-30 16:37:48,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:48,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:37:48,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:48,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:37:48,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:37:48,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 77 [2023-08-30 16:37:48,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:48,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:48,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 77 [2023-08-30 16:37:48,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:48,221 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 16:37:48,221 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:48,222 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 16:37:48,223 INFO L137 encePairwiseOnDemand]: 75/77 looper letters, 0 selfloop transitions, 0 changer transitions 6/6 dead transitions. [2023-08-30 16:37:48,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-30 16:37:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:37:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:37:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 77 transitions. [2023-08-30 16:37:48,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 16:37:48,234 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 77 transitions. [2023-08-30 16:37:48,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 77 transitions. [2023-08-30 16:37:48,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:48,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 77 transitions. [2023-08-30 16:37:48,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:48,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:48,246 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:48,248 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 77 transitions. [2023-08-30 16:37:48,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-30 16:37:48,250 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 16:37:48,251 INFO L231 Difference]: Finished difference. Result has 10 places, 0 transitions, 0 flow [2023-08-30 16:37:48,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, 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 16:37:48,257 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-30 16:37:48,258 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 0 transitions, 0 flow [2023-08-30 16:37:48,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:48,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:37:48,263 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:37:48,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:37:48,266 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:37:48,272 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 16:37:48,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 85 flow [2023-08-30 16:37:48,296 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2023-08-30 16:37:48,296 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:48,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 2/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-08-30 16:37:48,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 40 transitions, 85 flow [2023-08-30 16:37:48,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 34 transitions, 73 flow [2023-08-30 16:37:48,298 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:48,298 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 37 places, 34 transitions, 73 flow [2023-08-30 16:37:48,298 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 37 places, 34 transitions, 73 flow [2023-08-30 16:37:48,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 34 transitions, 73 flow [2023-08-30 16:37:48,305 INFO L130 PetriNetUnfolder]: 0/38 cut-off events. [2023-08-30 16:37:48,305 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:48,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-30 16:37:48,306 INFO L119 LiptonReduction]: Number of co-enabled transitions 154 [2023-08-30 16:37:49,257 INFO L134 LiptonReduction]: Checked pairs total: 140 [2023-08-30 16:37:49,257 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-08-30 16:37:49,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:37:49,260 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:49,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:37:49,262 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:37:49,262 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:49,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:49,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:37:49,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:37:49,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:49,262 INFO L85 PathProgramCache]: Analyzing trace with hash 6519443, now seen corresponding path program 1 times [2023-08-30 16:37:49,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:49,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458726998] [2023-08-30 16:37:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:49,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:49,282 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:37:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:49,308 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:37:49,308 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:37:49,308 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:37:49,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:37:49,309 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:37:49,309 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:37:49,310 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:37:49,310 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 16:37:49,320 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:37:49,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 52 transitions, 116 flow [2023-08-30 16:37:49,331 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2023-08-30 16:37:49,331 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:37:49,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 16:37:49,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 52 transitions, 116 flow [2023-08-30 16:37:49,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 52 transitions, 116 flow [2023-08-30 16:37:49,333 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:49,333 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 56 places, 52 transitions, 116 flow [2023-08-30 16:37:49,333 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 56 places, 52 transitions, 116 flow [2023-08-30 16:37:49,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 52 transitions, 116 flow [2023-08-30 16:37:49,340 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2023-08-30 16:37:49,340 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:37:49,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 16:37:49,341 INFO L119 LiptonReduction]: Number of co-enabled transitions 836 [2023-08-30 16:37:50,194 INFO L134 LiptonReduction]: Checked pairs total: 1015 [2023-08-30 16:37:50,194 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-08-30 16:37:50,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:37:50,197 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:50,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:37:50,198 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 16:37:50,198 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:50,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:50,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:37:50,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:50,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash 303251698, now seen corresponding path program 1 times [2023-08-30 16:37:50,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:50,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056720410] [2023-08-30 16:37:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:50,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:50,240 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 16:37:50,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:50,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056720410] [2023-08-30 16:37:50,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056720410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:50,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:50,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:50,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080774133] [2023-08-30 16:37:50,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:50,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:50,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:50,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-30 16:37:50,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:50,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-30 16:37:50,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:50,287 INFO L130 PetriNetUnfolder]: 42/97 cut-off events. [2023-08-30 16:37:50,288 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 16:37:50,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 97 events. 42/97 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 409 event pairs, 16 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 47 conditions per place. [2023-08-30 16:37:50,289 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 12 selfloop transitions, 3 changer transitions 1/19 dead transitions. [2023-08-30 16:37:50,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 87 flow [2023-08-30 16:37:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-08-30 16:37:50,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-30 16:37:50,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-08-30 16:37:50,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-08-30 16:37:50,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:50,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-08-30 16:37:50,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,294 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 3 states and 133 transitions. [2023-08-30 16:37:50,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 87 flow [2023-08-30 16:37:50,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 85 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:37:50,296 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 58 flow [2023-08-30 16:37:50,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-30 16:37:50,296 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2023-08-30 16:37:50,297 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 58 flow [2023-08-30 16:37:50,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:50,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:50,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:37:50,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:50,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash -179283174, now seen corresponding path program 1 times [2023-08-30 16:37:50,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:50,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260961029] [2023-08-30 16:37:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:50,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:50,334 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 16:37:50,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:50,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260961029] [2023-08-30 16:37:50,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260961029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:50,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:50,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066496916] [2023-08-30 16:37:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:50,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:50,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:50,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-30 16:37:50,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:50,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-30 16:37:50,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:50,370 INFO L130 PetriNetUnfolder]: 33/92 cut-off events. [2023-08-30 16:37:50,375 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 16:37:50,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 92 events. 33/92 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 387 event pairs, 18 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 98. Up to 41 conditions per place. [2023-08-30 16:37:50,376 INFO L137 encePairwiseOnDemand]: 87/91 looper letters, 10 selfloop transitions, 3 changer transitions 3/19 dead transitions. [2023-08-30 16:37:50,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 104 flow [2023-08-30 16:37:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-08-30 16:37:50,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2023-08-30 16:37:50,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-08-30 16:37:50,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-08-30 16:37:50,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:50,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-08-30 16:37:50,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,381 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 58 flow. Second operand 3 states and 129 transitions. [2023-08-30 16:37:50,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 104 flow [2023-08-30 16:37:50,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:37:50,383 INFO L231 Difference]: Finished difference. Result has 24 places, 15 transitions, 70 flow [2023-08-30 16:37:50,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=24, PETRI_TRANSITIONS=15} [2023-08-30 16:37:50,384 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-08-30 16:37:50,384 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 15 transitions, 70 flow [2023-08-30 16:37:50,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:50,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:50,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:37:50,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:50,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1261743401, now seen corresponding path program 1 times [2023-08-30 16:37:50,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:50,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801776879] [2023-08-30 16:37:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:50,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:37:50,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:50,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801776879] [2023-08-30 16:37:50,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801776879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:50,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:50,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:37:50,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402239690] [2023-08-30 16:37:50,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:50,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:37:50,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:50,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:37:50,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:37:50,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-30 16:37:50,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 15 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:50,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-30 16:37:50,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:50,513 INFO L130 PetriNetUnfolder]: 20/63 cut-off events. [2023-08-30 16:37:50,514 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-30 16:37:50,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 63 events. 20/63 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 235 event pairs, 4 based on Foata normal form. 4/63 useless extension candidates. Maximal degree in co-relation 146. Up to 46 conditions per place. [2023-08-30 16:37:50,514 INFO L137 encePairwiseOnDemand]: 89/91 looper letters, 8 selfloop transitions, 1 changer transitions 5/17 dead transitions. [2023-08-30 16:37:50,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 107 flow [2023-08-30 16:37:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-08-30 16:37:50,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46886446886446886 [2023-08-30 16:37:50,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-08-30 16:37:50,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-08-30 16:37:50,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:50,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-08-30 16:37:50,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,519 INFO L175 Difference]: Start difference. First operand has 24 places, 15 transitions, 70 flow. Second operand 3 states and 128 transitions. [2023-08-30 16:37:50,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 107 flow [2023-08-30 16:37:50,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 17 transitions, 101 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:37:50,520 INFO L231 Difference]: Finished difference. Result has 23 places, 11 transitions, 46 flow [2023-08-30 16:37:50,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=11} [2023-08-30 16:37:50,521 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-08-30 16:37:50,521 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 11 transitions, 46 flow [2023-08-30 16:37:50,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:50,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:50,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:37:50,522 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:50,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:50,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1262809192, now seen corresponding path program 1 times [2023-08-30 16:37:50,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:50,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591234501] [2023-08-30 16:37:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:50,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:50,561 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 16:37:50,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:50,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591234501] [2023-08-30 16:37:50,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591234501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:50,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:50,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:37:50,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896179108] [2023-08-30 16:37:50,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:50,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:37:50,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:50,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:37:50,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:37:50,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2023-08-30 16:37:50,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 11 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:50,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2023-08-30 16:37:50,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:50,588 INFO L130 PetriNetUnfolder]: 3/20 cut-off events. [2023-08-30 16:37:50,589 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 16:37:50,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 20 events. 3/20 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 4/24 useless extension candidates. Maximal degree in co-relation 36. Up to 9 conditions per place. [2023-08-30 16:37:50,589 INFO L137 encePairwiseOnDemand]: 89/91 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-30 16:37:50,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 11 transitions, 60 flow [2023-08-30 16:37:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-08-30 16:37:50,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2023-08-30 16:37:50,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-08-30 16:37:50,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-08-30 16:37:50,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:50,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-08-30 16:37:50,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,595 INFO L175 Difference]: Start difference. First operand has 23 places, 11 transitions, 46 flow. Second operand 3 states and 123 transitions. [2023-08-30 16:37:50,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 11 transitions, 60 flow [2023-08-30 16:37:50,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 11 transitions, 49 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 16:37:50,596 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-30 16:37:50,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-30 16:37:50,597 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-08-30 16:37:50,597 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-30 16:37:50,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:50,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 16:37:50,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 16:37:50,598 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 16:37:50,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:37:50,598 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 16:37:50,599 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 16:37:50,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 52 transitions, 116 flow [2023-08-30 16:37:50,605 INFO L130 PetriNetUnfolder]: 3/74 cut-off events. [2023-08-30 16:37:50,605 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:37:50,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-08-30 16:37:50,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 52 transitions, 116 flow [2023-08-30 16:37:50,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 46 transitions, 104 flow [2023-08-30 16:37:50,607 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:50,607 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 51 places, 46 transitions, 104 flow [2023-08-30 16:37:50,607 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 51 places, 46 transitions, 104 flow [2023-08-30 16:37:50,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 46 transitions, 104 flow [2023-08-30 16:37:50,611 INFO L130 PetriNetUnfolder]: 0/56 cut-off events. [2023-08-30 16:37:50,611 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:37:50,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 56 events. 0/56 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 46 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-30 16:37:50,612 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-30 16:37:51,525 INFO L134 LiptonReduction]: Checked pairs total: 778 [2023-08-30 16:37:51,526 INFO L136 LiptonReduction]: Total number of compositions: 37 [2023-08-30 16:37:51,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:37:51,528 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:51,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:37:51,530 INFO L130 PetriNetUnfolder]: 0/13 cut-off events. [2023-08-30 16:37:51,530 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:37:51,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:51,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-30 16:37:51,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:37:51,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1089827442, now seen corresponding path program 1 times [2023-08-30 16:37:51,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:51,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592504117] [2023-08-30 16:37:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:51,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:51,552 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:37:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:51,573 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:37:51,576 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:37:51,576 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:37:51,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:37:51,577 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:37:51,578 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:37:51,578 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:37:51,578 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 16:37:51,591 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:37:51,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-30 16:37:51,607 INFO L130 PetriNetUnfolder]: 4/98 cut-off events. [2023-08-30 16:37:51,608 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:37:51,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 149 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 78. Up to 8 conditions per place. [2023-08-30 16:37:51,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2023-08-30 16:37:51,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 149 flow [2023-08-30 16:37:51,610 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:51,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 64 transitions, 149 flow [2023-08-30 16:37:51,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 64 transitions, 149 flow [2023-08-30 16:37:51,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-30 16:37:51,619 INFO L130 PetriNetUnfolder]: 4/98 cut-off events. [2023-08-30 16:37:51,619 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:37:51,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 149 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 78. Up to 8 conditions per place. [2023-08-30 16:37:51,622 INFO L119 LiptonReduction]: Number of co-enabled transitions 1650 [2023-08-30 16:37:52,554 INFO L134 LiptonReduction]: Checked pairs total: 2561 [2023-08-30 16:37:52,554 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-30 16:37:52,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:37:52,557 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:52,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 16:37:52,558 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 16:37:52,558 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:52,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:52,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:37:52,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:52,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash 455812634, now seen corresponding path program 1 times [2023-08-30 16:37:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:52,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934257345] [2023-08-30 16:37:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:52,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:52,576 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 16:37:52,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:52,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934257345] [2023-08-30 16:37:52,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934257345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:52,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:52,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:52,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206807773] [2023-08-30 16:37:52,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:52,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:52,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:52,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:52,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:52,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 16:37:52,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:52,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 16:37:52,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:52,649 INFO L130 PetriNetUnfolder]: 370/649 cut-off events. [2023-08-30 16:37:52,649 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2023-08-30 16:37:52,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 649 events. 370/649 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3500 event pairs, 180 based on Foata normal form. 0/500 useless extension candidates. Maximal degree in co-relation 328. Up to 363 conditions per place. [2023-08-30 16:37:52,653 INFO L137 encePairwiseOnDemand]: 105/111 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-08-30 16:37:52,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 135 flow [2023-08-30 16:37:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-08-30 16:37:52,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2023-08-30 16:37:52,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-08-30 16:37:52,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-08-30 16:37:52,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:52,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-08-30 16:37:52,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,658 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 3 states and 165 transitions. [2023-08-30 16:37:52,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 135 flow [2023-08-30 16:37:52,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 127 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 16:37:52,660 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 79 flow [2023-08-30 16:37:52,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-30 16:37:52,660 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-30 16:37:52,661 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 79 flow [2023-08-30 16:37:52,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:52,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:52,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:37:52,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:52,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash 402558165, now seen corresponding path program 1 times [2023-08-30 16:37:52,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:52,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939956512] [2023-08-30 16:37:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:52,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:52,691 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 16:37:52,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:52,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939956512] [2023-08-30 16:37:52,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939956512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:52,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:52,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:52,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236202865] [2023-08-30 16:37:52,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:52,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:52,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:52,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:52,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:52,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 16:37:52,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:52,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 16:37:52,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:52,775 INFO L130 PetriNetUnfolder]: 432/765 cut-off events. [2023-08-30 16:37:52,776 INFO L131 PetriNetUnfolder]: For 445/445 co-relation queries the response was YES. [2023-08-30 16:37:52,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 765 events. 432/765 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 4381 event pairs, 182 based on Foata normal form. 0/647 useless extension candidates. Maximal degree in co-relation 950. Up to 429 conditions per place. [2023-08-30 16:37:52,780 INFO L137 encePairwiseOnDemand]: 106/111 looper letters, 22 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-08-30 16:37:52,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 180 flow [2023-08-30 16:37:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-08-30 16:37:52,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-08-30 16:37:52,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-08-30 16:37:52,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-08-30 16:37:52,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:52,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-08-30 16:37:52,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,784 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 79 flow. Second operand 3 states and 162 transitions. [2023-08-30 16:37:52,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 180 flow [2023-08-30 16:37:52,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:37:52,787 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 119 flow [2023-08-30 16:37:52,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-30 16:37:52,788 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-30 16:37:52,788 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 119 flow [2023-08-30 16:37:52,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:52,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:52,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:37:52,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:52,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:52,789 INFO L85 PathProgramCache]: Analyzing trace with hash -404298529, now seen corresponding path program 1 times [2023-08-30 16:37:52,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:52,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405766879] [2023-08-30 16:37:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:52,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:37:52,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:52,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405766879] [2023-08-30 16:37:52,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405766879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:52,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:52,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:37:52,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569568036] [2023-08-30 16:37:52,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:52,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:37:52,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:52,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:37:52,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:37:52,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 16:37:52,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:52,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 16:37:52,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:52,935 INFO L130 PetriNetUnfolder]: 352/619 cut-off events. [2023-08-30 16:37:52,935 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2023-08-30 16:37:52,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1887 conditions, 619 events. 352/619 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3525 event pairs, 64 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 1834. Up to 512 conditions per place. [2023-08-30 16:37:52,939 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 28 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-30 16:37:52,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 225 flow [2023-08-30 16:37:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-08-30 16:37:52,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48348348348348347 [2023-08-30 16:37:52,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-08-30 16:37:52,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-08-30 16:37:52,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:52,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-08-30 16:37:52,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,944 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 119 flow. Second operand 3 states and 161 transitions. [2023-08-30 16:37:52,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 225 flow [2023-08-30 16:37:52,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:37:52,947 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 107 flow [2023-08-30 16:37:52,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-30 16:37:52,949 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-30 16:37:52,949 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 107 flow [2023-08-30 16:37:52,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:52,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:52,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:52,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:37:52,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:52,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:52,951 INFO L85 PathProgramCache]: Analyzing trace with hash -405596798, now seen corresponding path program 1 times [2023-08-30 16:37:52,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:52,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255581799] [2023-08-30 16:37:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:52,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:53,031 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 16:37:53,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:53,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255581799] [2023-08-30 16:37:53,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255581799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:53,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:53,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:37:53,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747677975] [2023-08-30 16:37:53,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:53,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:37:53,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:37:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:37:53,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 16:37:53,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:53,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 16:37:53,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:53,119 INFO L130 PetriNetUnfolder]: 285/518 cut-off events. [2023-08-30 16:37:53,119 INFO L131 PetriNetUnfolder]: For 392/392 co-relation queries the response was YES. [2023-08-30 16:37:53,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 518 events. 285/518 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2833 event pairs, 51 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 778. Up to 412 conditions per place. [2023-08-30 16:37:53,122 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 23 selfloop transitions, 2 changer transitions 2/30 dead transitions. [2023-08-30 16:37:53,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 192 flow [2023-08-30 16:37:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-08-30 16:37:53,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744744744744745 [2023-08-30 16:37:53,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-08-30 16:37:53,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-08-30 16:37:53,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:53,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-08-30 16:37:53,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 16:37:53,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,126 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 107 flow. Second operand 3 states and 158 transitions. [2023-08-30 16:37:53,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 192 flow [2023-08-30 16:37:53,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:37:53,127 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 103 flow [2023-08-30 16:37:53,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-08-30 16:37:53,128 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-30 16:37:53,129 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 103 flow [2023-08-30 16:37:53,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:53,129 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:53,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 16:37:53,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:53,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:53,130 INFO L85 PathProgramCache]: Analyzing trace with hash 471070764, now seen corresponding path program 1 times [2023-08-30 16:37:53,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:53,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563528445] [2023-08-30 16:37:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:53,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:53,153 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 16:37:53,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:53,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563528445] [2023-08-30 16:37:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563528445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:53,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:53,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:53,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946523678] [2023-08-30 16:37:53,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:53,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:53,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:53,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 16:37:53,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:53,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 16:37:53,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:53,222 INFO L130 PetriNetUnfolder]: 173/393 cut-off events. [2023-08-30 16:37:53,223 INFO L131 PetriNetUnfolder]: For 336/336 co-relation queries the response was YES. [2023-08-30 16:37:53,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 393 events. 173/393 cut-off events. For 336/336 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2237 event pairs, 107 based on Foata normal form. 32/421 useless extension candidates. Maximal degree in co-relation 622. Up to 274 conditions per place. [2023-08-30 16:37:53,225 INFO L137 encePairwiseOnDemand]: 107/111 looper letters, 17 selfloop transitions, 7 changer transitions 1/28 dead transitions. [2023-08-30 16:37:53,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 193 flow [2023-08-30 16:37:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-08-30 16:37:53,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46546546546546547 [2023-08-30 16:37:53,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-08-30 16:37:53,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-08-30 16:37:53,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:53,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-08-30 16:37:53,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,228 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 103 flow. Second operand 3 states and 155 transitions. [2023-08-30 16:37:53,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 193 flow [2023-08-30 16:37:53,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:37:53,230 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 154 flow [2023-08-30 16:37:53,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-30 16:37:53,232 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-30 16:37:53,232 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 154 flow [2023-08-30 16:37:53,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:53,232 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:53,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:37:53,233 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:37:53,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:53,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1718294431, now seen corresponding path program 1 times [2023-08-30 16:37:53,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:53,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809939879] [2023-08-30 16:37:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:53,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:53,398 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 16:37:53,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:53,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809939879] [2023-08-30 16:37:53,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809939879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:53,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:53,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:37:53,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012828350] [2023-08-30 16:37:53,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:53,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:37:53,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:37:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:37:53,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 111 [2023-08-30 16:37:53,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:53,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 111 [2023-08-30 16:37:53,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:53,458 INFO L130 PetriNetUnfolder]: 120/310 cut-off events. [2023-08-30 16:37:53,458 INFO L131 PetriNetUnfolder]: For 471/471 co-relation queries the response was YES. [2023-08-30 16:37:53,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 310 events. 120/310 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1779 event pairs, 57 based on Foata normal form. 30/336 useless extension candidates. Maximal degree in co-relation 551. Up to 134 conditions per place. [2023-08-30 16:37:53,459 INFO L137 encePairwiseOnDemand]: 109/111 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-30 16:37:53,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 30 transitions, 240 flow [2023-08-30 16:37:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2023-08-30 16:37:53,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624624624624625 [2023-08-30 16:37:53,461 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2023-08-30 16:37:53,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2023-08-30 16:37:53,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:53,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2023-08-30 16:37:53,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,463 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 154 flow. Second operand 3 states and 154 transitions. [2023-08-30 16:37:53,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 30 transitions, 240 flow [2023-08-30 16:37:53,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:37:53,465 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-30 16:37:53,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-30 16:37:53,465 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-30 16:37:53,465 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-30 16:37:53,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:53,466 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 16:37:53,466 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 16:37:53,466 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 16:37:53,466 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 16:37:53,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:37:53,467 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 16:37:53,467 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:37:53,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 149 flow [2023-08-30 16:37:53,480 INFO L130 PetriNetUnfolder]: 4/98 cut-off events. [2023-08-30 16:37:53,481 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:37:53,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 4/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 149 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 78. Up to 8 conditions per place. [2023-08-30 16:37:53,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 64 transitions, 149 flow [2023-08-30 16:37:53,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 58 transitions, 137 flow [2023-08-30 16:37:53,482 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:53,482 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 58 transitions, 137 flow [2023-08-30 16:37:53,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 58 transitions, 137 flow [2023-08-30 16:37:53,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 58 transitions, 137 flow [2023-08-30 16:37:53,487 INFO L130 PetriNetUnfolder]: 0/74 cut-off events. [2023-08-30 16:37:53,487 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:37:53,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 74 events. 0/74 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-08-30 16:37:53,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 1254 [2023-08-30 16:37:54,578 INFO L134 LiptonReduction]: Checked pairs total: 1955 [2023-08-30 16:37:54,578 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-30 16:37:54,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:37:54,580 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:54,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:37:54,582 INFO L130 PetriNetUnfolder]: 0/19 cut-off events. [2023-08-30 16:37:54,582 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:37:54,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:54,583 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-08-30 16:37:54,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:37:54,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash -172493043, now seen corresponding path program 1 times [2023-08-30 16:37:54,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:54,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271447181] [2023-08-30 16:37:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:54,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:54,593 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:37:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:54,601 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:37:54,601 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:37:54,601 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:37:54,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:37:54,602 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:37:54,602 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:37:54,602 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:37:54,603 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 16:37:54,616 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:37:54,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 76 transitions, 184 flow [2023-08-30 16:37:54,626 INFO L130 PetriNetUnfolder]: 5/122 cut-off events. [2023-08-30 16:37:54,626 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:37:54,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 5/122 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-30 16:37:54,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 76 transitions, 184 flow [2023-08-30 16:37:54,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 76 transitions, 184 flow [2023-08-30 16:37:54,627 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:54,627 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 76 transitions, 184 flow [2023-08-30 16:37:54,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 76 transitions, 184 flow [2023-08-30 16:37:54,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 76 transitions, 184 flow [2023-08-30 16:37:54,635 INFO L130 PetriNetUnfolder]: 5/122 cut-off events. [2023-08-30 16:37:54,635 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:37:54,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 5/122 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-30 16:37:54,637 INFO L119 LiptonReduction]: Number of co-enabled transitions 2728 [2023-08-30 16:37:55,625 INFO L134 LiptonReduction]: Checked pairs total: 4227 [2023-08-30 16:37:55,625 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-08-30 16:37:55,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:37:55,626 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:55,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 16:37:55,628 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 16:37:55,628 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:37:55,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:55,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:37:55,628 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 16:37:55,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash 634915344, now seen corresponding path program 1 times [2023-08-30 16:37:55,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:55,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907345409] [2023-08-30 16:37:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:55,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:55,650 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 16:37:55,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:55,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907345409] [2023-08-30 16:37:55,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907345409] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:55,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:55,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:55,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985539271] [2023-08-30 16:37:55,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:55,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:55,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:55,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 16:37:55,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:55,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:55,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 16:37:55,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:55,918 INFO L130 PetriNetUnfolder]: 2300/3511 cut-off events. [2023-08-30 16:37:55,919 INFO L131 PetriNetUnfolder]: For 1374/1374 co-relation queries the response was YES. [2023-08-30 16:37:55,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7619 conditions, 3511 events. 2300/3511 cut-off events. For 1374/1374 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 20881 event pairs, 1224 based on Foata normal form. 0/2580 useless extension candidates. Maximal degree in co-relation 1418. Up to 2129 conditions per place. [2023-08-30 16:37:55,939 INFO L137 encePairwiseOnDemand]: 124/131 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-08-30 16:37:55,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 187 flow [2023-08-30 16:37:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-08-30 16:37:55,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012722646310432 [2023-08-30 16:37:55,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-08-30 16:37:55,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-08-30 16:37:55,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:55,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-08-30 16:37:55,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:55,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:55,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:55,943 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 76 flow. Second operand 3 states and 197 transitions. [2023-08-30 16:37:55,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 187 flow [2023-08-30 16:37:55,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 169 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 16:37:55,945 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 100 flow [2023-08-30 16:37:55,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-08-30 16:37:55,946 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-08-30 16:37:55,946 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 100 flow [2023-08-30 16:37:55,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:55,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:55,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:55,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:37:55,947 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 16:37:55,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:55,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1510861194, now seen corresponding path program 1 times [2023-08-30 16:37:55,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:55,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600691098] [2023-08-30 16:37:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:55,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:55,971 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 16:37:55,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:55,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600691098] [2023-08-30 16:37:55,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600691098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:55,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:55,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840651542] [2023-08-30 16:37:55,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:55,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:55,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:55,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:55,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 16:37:55,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:55,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:55,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 16:37:55,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:56,397 INFO L130 PetriNetUnfolder]: 3060/4717 cut-off events. [2023-08-30 16:37:56,397 INFO L131 PetriNetUnfolder]: For 2755/2755 co-relation queries the response was YES. [2023-08-30 16:37:56,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12124 conditions, 4717 events. 3060/4717 cut-off events. For 2755/2755 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 30285 event pairs, 1352 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 5760. Up to 2885 conditions per place. [2023-08-30 16:37:56,428 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-08-30 16:37:56,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 242 flow [2023-08-30 16:37:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2023-08-30 16:37:56,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49363867684478374 [2023-08-30 16:37:56,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2023-08-30 16:37:56,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2023-08-30 16:37:56,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:56,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2023-08-30 16:37:56,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:56,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:56,433 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:56,433 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 100 flow. Second operand 3 states and 194 transitions. [2023-08-30 16:37:56,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 242 flow [2023-08-30 16:37:56,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:37:56,443 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 158 flow [2023-08-30 16:37:56,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-30 16:37:56,445 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-08-30 16:37:56,445 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 158 flow [2023-08-30 16:37:56,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:56,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:56,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:56,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:37:56,446 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 16:37:56,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash -406442652, now seen corresponding path program 1 times [2023-08-30 16:37:56,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:56,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892421257] [2023-08-30 16:37:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:56,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:37:56,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:56,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892421257] [2023-08-30 16:37:56,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892421257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:56,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:56,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:37:56,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320018485] [2023-08-30 16:37:56,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:56,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:37:56,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:56,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:37:56,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:37:56,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 16:37:56,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:56,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:56,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 16:37:56,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:56,777 INFO L130 PetriNetUnfolder]: 2474/3707 cut-off events. [2023-08-30 16:37:56,777 INFO L131 PetriNetUnfolder]: For 3413/3413 co-relation queries the response was YES. [2023-08-30 16:37:56,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11159 conditions, 3707 events. 2474/3707 cut-off events. For 3413/3413 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 22880 event pairs, 472 based on Foata normal form. 0/3135 useless extension candidates. Maximal degree in co-relation 11105. Up to 3026 conditions per place. [2023-08-30 16:37:56,809 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-30 16:37:56,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 321 flow [2023-08-30 16:37:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-08-30 16:37:56,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4910941475826972 [2023-08-30 16:37:56,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-08-30 16:37:56,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-08-30 16:37:56,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:56,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-08-30 16:37:56,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:56,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:56,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:56,813 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 158 flow. Second operand 3 states and 193 transitions. [2023-08-30 16:37:56,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 321 flow [2023-08-30 16:37:56,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:37:56,824 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 142 flow [2023-08-30 16:37:56,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 16:37:56,825 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-08-30 16:37:56,825 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 142 flow [2023-08-30 16:37:56,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:56,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:56,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:56,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 16:37:56,826 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 16:37:56,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:56,827 INFO L85 PathProgramCache]: Analyzing trace with hash -407940871, now seen corresponding path program 1 times [2023-08-30 16:37:56,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:56,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879078420] [2023-08-30 16:37:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:56,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:56,855 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 16:37:56,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:56,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879078420] [2023-08-30 16:37:56,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879078420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:56,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:56,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:37:56,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342230549] [2023-08-30 16:37:56,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:56,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:37:56,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:37:56,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:37:56,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 16:37:56,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:56,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:56,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 16:37:56,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:57,153 INFO L130 PetriNetUnfolder]: 1993/3029 cut-off events. [2023-08-30 16:37:57,154 INFO L131 PetriNetUnfolder]: For 2304/2304 co-relation queries the response was YES. [2023-08-30 16:37:57,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8826 conditions, 3029 events. 1993/3029 cut-off events. For 2304/2304 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 18194 event pairs, 335 based on Foata normal form. 0/2587 useless extension candidates. Maximal degree in co-relation 4399. Up to 2450 conditions per place. [2023-08-30 16:37:57,178 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 38 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-30 16:37:57,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 282 flow [2023-08-30 16:37:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-08-30 16:37:57,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48346055979643765 [2023-08-30 16:37:57,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-08-30 16:37:57,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-08-30 16:37:57,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:57,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-08-30 16:37:57,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,183 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 142 flow. Second operand 3 states and 190 transitions. [2023-08-30 16:37:57,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 282 flow [2023-08-30 16:37:57,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:37:57,185 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 140 flow [2023-08-30 16:37:57,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-30 16:37:57,186 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-08-30 16:37:57,186 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 140 flow [2023-08-30 16:37:57,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:57,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:57,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 16:37:57,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:37:57,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:57,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1230789417, now seen corresponding path program 1 times [2023-08-30 16:37:57,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:57,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370867253] [2023-08-30 16:37:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:57,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:57,208 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 16:37:57,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:57,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370867253] [2023-08-30 16:37:57,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370867253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:57,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:57,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:57,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146476591] [2023-08-30 16:37:57,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:57,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:57,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:57,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:57,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:57,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 16:37:57,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:57,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 16:37:57,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:57,498 INFO L130 PetriNetUnfolder]: 2430/3913 cut-off events. [2023-08-30 16:37:57,499 INFO L131 PetriNetUnfolder]: For 3547/3547 co-relation queries the response was YES. [2023-08-30 16:37:57,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11283 conditions, 3913 events. 2430/3913 cut-off events. For 3547/3547 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 26090 event pairs, 988 based on Foata normal form. 0/3420 useless extension candidates. Maximal degree in co-relation 6586. Up to 2459 conditions per place. [2023-08-30 16:37:57,523 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 30 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2023-08-30 16:37:57,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 311 flow [2023-08-30 16:37:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-08-30 16:37:57,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48091603053435117 [2023-08-30 16:37:57,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-08-30 16:37:57,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-08-30 16:37:57,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:57,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-08-30 16:37:57,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,526 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 140 flow. Second operand 3 states and 189 transitions. [2023-08-30 16:37:57,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 311 flow [2023-08-30 16:37:57,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:37:57,530 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 264 flow [2023-08-30 16:37:57,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-30 16:37:57,530 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-08-30 16:37:57,530 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 264 flow [2023-08-30 16:37:57,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:57,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:57,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 16:37:57,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:37:57,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 500237098, now seen corresponding path program 1 times [2023-08-30 16:37:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:57,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37301017] [2023-08-30 16:37:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:57,563 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 16:37:57,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:57,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37301017] [2023-08-30 16:37:57,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37301017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:57,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:57,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:37:57,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304622800] [2023-08-30 16:37:57,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:57,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:37:57,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:37:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:37:57,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 16:37:57,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:57,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 16:37:57,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:57,796 INFO L130 PetriNetUnfolder]: 1955/3099 cut-off events. [2023-08-30 16:37:57,796 INFO L131 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2023-08-30 16:37:57,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11103 conditions, 3099 events. 1955/3099 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 19739 event pairs, 409 based on Foata normal form. 204/3066 useless extension candidates. Maximal degree in co-relation 6139. Up to 2442 conditions per place. [2023-08-30 16:37:57,814 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 43 selfloop transitions, 4 changer transitions 2/52 dead transitions. [2023-08-30 16:37:57,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 447 flow [2023-08-30 16:37:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2023-08-30 16:37:57,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758269720101781 [2023-08-30 16:37:57,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 187 transitions. [2023-08-30 16:37:57,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 187 transitions. [2023-08-30 16:37:57,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:57,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 187 transitions. [2023-08-30 16:37:57,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,818 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 264 flow. Second operand 3 states and 187 transitions. [2023-08-30 16:37:57,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 447 flow [2023-08-30 16:37:57,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 52 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:37:57,828 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 240 flow [2023-08-30 16:37:57,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-08-30 16:37:57,829 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-08-30 16:37:57,830 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 240 flow [2023-08-30 16:37:57,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:57,830 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:57,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 16:37:57,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:37:57,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:57,831 INFO L85 PathProgramCache]: Analyzing trace with hash 215184118, now seen corresponding path program 1 times [2023-08-30 16:37:57,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:57,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993414126] [2023-08-30 16:37:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:57,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 16:37:57,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:57,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993414126] [2023-08-30 16:37:57,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993414126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:57,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:57,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:37:57,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820267779] [2023-08-30 16:37:57,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:57,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:37:57,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:57,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:37:57,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:37:57,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 16:37:57,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:57,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:57,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 16:37:57,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:58,053 INFO L130 PetriNetUnfolder]: 1371/2521 cut-off events. [2023-08-30 16:37:58,053 INFO L131 PetriNetUnfolder]: For 3937/3937 co-relation queries the response was YES. [2023-08-30 16:37:58,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8467 conditions, 2521 events. 1371/2521 cut-off events. For 3937/3937 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 17626 event pairs, 711 based on Foata normal form. 128/2636 useless extension candidates. Maximal degree in co-relation 4299. Up to 1892 conditions per place. [2023-08-30 16:37:58,065 INFO L137 encePairwiseOnDemand]: 126/131 looper letters, 29 selfloop transitions, 19 changer transitions 1/52 dead transitions. [2023-08-30 16:37:58,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 52 transitions, 464 flow [2023-08-30 16:37:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-30 16:37:58,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681933842239186 [2023-08-30 16:37:58,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-30 16:37:58,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-30 16:37:58,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:58,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-30 16:37:58,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:58,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:58,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:58,070 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 240 flow. Second operand 3 states and 184 transitions. [2023-08-30 16:37:58,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 52 transitions, 464 flow [2023-08-30 16:37:58,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 52 transitions, 456 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:37:58,073 INFO L231 Difference]: Finished difference. Result has 38 places, 47 transitions, 419 flow [2023-08-30 16:37:58,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=38, PETRI_TRANSITIONS=47} [2023-08-30 16:37:58,074 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-08-30 16:37:58,074 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 47 transitions, 419 flow [2023-08-30 16:37:58,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:58,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:58,074 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:58,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 16:37:58,075 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:37:58,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1919223779, now seen corresponding path program 1 times [2023-08-30 16:37:58,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:58,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525411695] [2023-08-30 16:37:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:58,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:37:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 16:37:58,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:37:58,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525411695] [2023-08-30 16:37:58,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525411695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:37:58,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:37:58,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:37:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477029691] [2023-08-30 16:37:58,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:37:58,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:37:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:37:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:37:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:37:58,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 131 [2023-08-30 16:37:58,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 47 transitions, 419 flow. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:58,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:37:58,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 131 [2023-08-30 16:37:58,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:37:58,268 INFO L130 PetriNetUnfolder]: 1002/1982 cut-off events. [2023-08-30 16:37:58,268 INFO L131 PetriNetUnfolder]: For 5087/5087 co-relation queries the response was YES. [2023-08-30 16:37:58,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7472 conditions, 1982 events. 1002/1982 cut-off events. For 5087/5087 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 14117 event pairs, 397 based on Foata normal form. 170/2139 useless extension candidates. Maximal degree in co-relation 3935. Up to 904 conditions per place. [2023-08-30 16:37:58,275 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 0 selfloop transitions, 0 changer transitions 62/62 dead transitions. [2023-08-30 16:37:58,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 62 transitions, 658 flow [2023-08-30 16:37:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:37:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:37:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2023-08-30 16:37:58,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46564885496183206 [2023-08-30 16:37:58,276 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2023-08-30 16:37:58,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2023-08-30 16:37:58,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:37:58,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2023-08-30 16:37:58,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:58,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:58,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:58,278 INFO L175 Difference]: Start difference. First operand has 38 places, 47 transitions, 419 flow. Second operand 3 states and 183 transitions. [2023-08-30 16:37:58,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 62 transitions, 658 flow [2023-08-30 16:37:58,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 62 transitions, 639 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:37:58,284 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-08-30 16:37:58,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-08-30 16:37:58,284 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-08-30 16:37:58,285 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-08-30 16:37:58,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:37:58,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-30 16:37:58,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 16:37:58,292 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 16:37:58,292 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 16:37:58,292 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 16:37:58,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 16:37:58,293 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:58,294 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:37:58,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 76 transitions, 184 flow [2023-08-30 16:37:58,304 INFO L130 PetriNetUnfolder]: 5/122 cut-off events. [2023-08-30 16:37:58,305 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:37:58,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 5/122 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-08-30 16:37:58,305 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 76 transitions, 184 flow [2023-08-30 16:37:58,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 70 transitions, 172 flow [2023-08-30 16:37:58,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:58,306 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 70 transitions, 172 flow [2023-08-30 16:37:58,306 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 70 transitions, 172 flow [2023-08-30 16:37:58,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 70 transitions, 172 flow [2023-08-30 16:37:58,312 INFO L130 PetriNetUnfolder]: 0/92 cut-off events. [2023-08-30 16:37:58,313 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:37:58,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 92 events. 0/92 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 106 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-08-30 16:37:58,314 INFO L119 LiptonReduction]: Number of co-enabled transitions 2200 [2023-08-30 16:37:59,526 INFO L134 LiptonReduction]: Checked pairs total: 3573 [2023-08-30 16:37:59,526 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-08-30 16:37:59,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:37:59,528 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:37:59,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:37:59,531 INFO L130 PetriNetUnfolder]: 0/25 cut-off events. [2023-08-30 16:37:59,532 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:37:59,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:37:59,532 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 16:37:59,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:37:59,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:37:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 578301167, now seen corresponding path program 1 times [2023-08-30 16:37:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:37:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713102457] [2023-08-30 16:37:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:37:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:37:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:59,551 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:37:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:37:59,571 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:37:59,572 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:37:59,572 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:37:59,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 16:37:59,572 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:37:59,573 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:37:59,573 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:37:59,573 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 16:37:59,591 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:37:59,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 88 transitions, 221 flow [2023-08-30 16:37:59,603 INFO L130 PetriNetUnfolder]: 6/146 cut-off events. [2023-08-30 16:37:59,603 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:37:59,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 146 events. 6/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 260 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 135. Up to 12 conditions per place. [2023-08-30 16:37:59,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 88 transitions, 221 flow [2023-08-30 16:37:59,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 88 transitions, 221 flow [2023-08-30 16:37:59,604 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:37:59,605 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 88 transitions, 221 flow [2023-08-30 16:37:59,605 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 88 transitions, 221 flow [2023-08-30 16:37:59,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 88 transitions, 221 flow [2023-08-30 16:37:59,615 INFO L130 PetriNetUnfolder]: 6/146 cut-off events. [2023-08-30 16:37:59,616 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:37:59,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 146 events. 6/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 260 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 135. Up to 12 conditions per place. [2023-08-30 16:37:59,619 INFO L119 LiptonReduction]: Number of co-enabled transitions 4070 [2023-08-30 16:38:00,765 INFO L134 LiptonReduction]: Checked pairs total: 6299 [2023-08-30 16:38:00,766 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-30 16:38:00,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:38:00,767 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:00,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 16:38:00,768 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 16:38:00,768 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:00,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:00,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:38:00,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:00,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:00,769 INFO L85 PathProgramCache]: Analyzing trace with hash 841036668, now seen corresponding path program 1 times [2023-08-30 16:38:00,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:00,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043504361] [2023-08-30 16:38:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:00,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:00,807 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 16:38:00,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:00,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043504361] [2023-08-30 16:38:00,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043504361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:00,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:00,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:00,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185251564] [2023-08-30 16:38:00,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:00,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:00,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:00,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:00,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:00,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 16:38:00,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:00,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:00,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 16:38:00,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:01,650 INFO L130 PetriNetUnfolder]: 12384/17359 cut-off events. [2023-08-30 16:38:01,650 INFO L131 PetriNetUnfolder]: For 8948/8948 co-relation queries the response was YES. [2023-08-30 16:38:01,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37925 conditions, 17359 events. 12384/17359 cut-off events. For 8948/8948 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 107421 event pairs, 6940 based on Foata normal form. 0/12846 useless extension candidates. Maximal degree in co-relation 7783. Up to 11057 conditions per place. [2023-08-30 16:38:01,842 INFO L137 encePairwiseOnDemand]: 143/151 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-08-30 16:38:01,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 243 flow [2023-08-30 16:38:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2023-08-30 16:38:01,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055187637969095 [2023-08-30 16:38:01,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2023-08-30 16:38:01,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2023-08-30 16:38:01,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:01,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2023-08-30 16:38:01,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:01,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:01,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:01,848 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 97 flow. Second operand 3 states and 229 transitions. [2023-08-30 16:38:01,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 243 flow [2023-08-30 16:38:01,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 211 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-30 16:38:01,856 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 121 flow [2023-08-30 16:38:01,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-30 16:38:01,857 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-30 16:38:01,857 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 121 flow [2023-08-30 16:38:01,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:01,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:01,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:01,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 16:38:01,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:01,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 966296793, now seen corresponding path program 1 times [2023-08-30 16:38:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:01,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785304483] [2023-08-30 16:38:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:01,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:01,882 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 16:38:01,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:01,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785304483] [2023-08-30 16:38:01,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785304483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:01,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:01,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:01,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412189494] [2023-08-30 16:38:01,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:01,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:01,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:01,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:01,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:01,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 16:38:01,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:01,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:01,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 16:38:01,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:03,402 INFO L130 PetriNetUnfolder]: 17214/24347 cut-off events. [2023-08-30 16:38:03,402 INFO L131 PetriNetUnfolder]: For 13763/13763 co-relation queries the response was YES. [2023-08-30 16:38:03,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62070 conditions, 24347 events. 17214/24347 cut-off events. For 13763/13763 co-relation queries the response was YES. Maximal size of possible extension queue 1703. Compared 161749 event pairs, 8064 based on Foata normal form. 0/19341 useless extension candidates. Maximal degree in co-relation 29432. Up to 15695 conditions per place. [2023-08-30 16:38:03,535 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-08-30 16:38:03,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 304 flow [2023-08-30 16:38:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-30 16:38:03,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988962472406181 [2023-08-30 16:38:03,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-30 16:38:03,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-30 16:38:03,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:03,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-30 16:38:03,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:03,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:03,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:03,538 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 121 flow. Second operand 3 states and 226 transitions. [2023-08-30 16:38:03,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 304 flow [2023-08-30 16:38:03,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:38:03,661 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 197 flow [2023-08-30 16:38:03,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-30 16:38:03,661 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-30 16:38:03,662 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 197 flow [2023-08-30 16:38:03,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:03,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:03,662 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:03,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 16:38:03,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:03,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash -107691297, now seen corresponding path program 1 times [2023-08-30 16:38:03,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:03,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009120300] [2023-08-30 16:38:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:03,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:38:03,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:03,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009120300] [2023-08-30 16:38:03,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009120300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:03,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:03,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:38:03,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522877646] [2023-08-30 16:38:03,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:03,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:38:03,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:38:03,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:38:03,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 16:38:03,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:03,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:03,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 16:38:03,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:04,661 INFO L130 PetriNetUnfolder]: 13946/19127 cut-off events. [2023-08-30 16:38:04,661 INFO L131 PetriNetUnfolder]: For 17220/17220 co-relation queries the response was YES. [2023-08-30 16:38:04,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56975 conditions, 19127 events. 13946/19127 cut-off events. For 17220/17220 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 121192 event pairs, 2700 based on Foata normal form. 0/15793 useless extension candidates. Maximal degree in co-relation 56920. Up to 15496 conditions per place. [2023-08-30 16:38:04,787 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-30 16:38:04,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 409 flow [2023-08-30 16:38:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-30 16:38:04,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966887417218543 [2023-08-30 16:38:04,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-30 16:38:04,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-30 16:38:04,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:04,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-30 16:38:04,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:04,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:04,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:04,794 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 197 flow. Second operand 3 states and 225 transitions. [2023-08-30 16:38:04,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 409 flow [2023-08-30 16:38:04,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:38:04,896 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 177 flow [2023-08-30 16:38:04,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-30 16:38:04,896 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-30 16:38:04,896 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 177 flow [2023-08-30 16:38:04,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:04,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:04,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:04,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 16:38:04,897 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:04,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash -109566188, now seen corresponding path program 1 times [2023-08-30 16:38:04,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:04,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647994879] [2023-08-30 16:38:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:04,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:04,962 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 16:38:04,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:04,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647994879] [2023-08-30 16:38:04,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647994879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:04,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:04,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:38:04,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591085626] [2023-08-30 16:38:04,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:04,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:38:04,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:04,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:38:04,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:38:04,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 16:38:04,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:04,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:04,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 16:38:04,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:05,904 INFO L130 PetriNetUnfolder]: 11269/15577 cut-off events. [2023-08-30 16:38:05,904 INFO L131 PetriNetUnfolder]: For 11490/11490 co-relation queries the response was YES. [2023-08-30 16:38:05,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44879 conditions, 15577 events. 11269/15577 cut-off events. For 11490/11490 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 96113 event pairs, 1895 based on Foata normal form. 0/12813 useless extension candidates. Maximal degree in co-relation 23207. Up to 12576 conditions per place. [2023-08-30 16:38:05,983 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 50 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-30 16:38:05,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 364 flow [2023-08-30 16:38:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-30 16:38:05,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4900662251655629 [2023-08-30 16:38:05,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-30 16:38:05,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-30 16:38:05,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:05,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-30 16:38:05,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:05,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:05,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:05,986 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 177 flow. Second operand 3 states and 222 transitions. [2023-08-30 16:38:05,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 364 flow [2023-08-30 16:38:05,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:38:05,990 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 175 flow [2023-08-30 16:38:05,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-30 16:38:05,990 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-30 16:38:05,991 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 175 flow [2023-08-30 16:38:05,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 4 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:05,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:05,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:05,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 16:38:05,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:05,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:05,992 INFO L85 PathProgramCache]: Analyzing trace with hash 711835288, now seen corresponding path program 1 times [2023-08-30 16:38:05,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:05,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763684656] [2023-08-30 16:38:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:05,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:06,007 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 16:38:06,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:06,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763684656] [2023-08-30 16:38:06,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763684656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:06,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:06,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:06,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947330644] [2023-08-30 16:38:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:06,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:06,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:06,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:06,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:06,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 16:38:06,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:06,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:06,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 16:38:06,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:07,186 INFO L130 PetriNetUnfolder]: 14850/21601 cut-off events. [2023-08-30 16:38:07,186 INFO L131 PetriNetUnfolder]: For 20184/20184 co-relation queries the response was YES. [2023-08-30 16:38:07,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61589 conditions, 21601 events. 14850/21601 cut-off events. For 20184/20184 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 150082 event pairs, 6228 based on Foata normal form. 0/18162 useless extension candidates. Maximal degree in co-relation 35418. Up to 14235 conditions per place. [2023-08-30 16:38:07,308 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 40 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2023-08-30 16:38:07,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 409 flow [2023-08-30 16:38:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-30 16:38:07,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878587196467991 [2023-08-30 16:38:07,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-30 16:38:07,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-30 16:38:07,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:07,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-30 16:38:07,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:07,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:07,311 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:07,311 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 175 flow. Second operand 3 states and 221 transitions. [2023-08-30 16:38:07,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 409 flow [2023-08-30 16:38:07,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:38:07,316 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 347 flow [2023-08-30 16:38:07,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2023-08-30 16:38:07,317 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-08-30 16:38:07,317 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 347 flow [2023-08-30 16:38:07,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:07,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:07,318 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:07,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 16:38:07,318 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:07,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 592061089, now seen corresponding path program 1 times [2023-08-30 16:38:07,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:07,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125436506] [2023-08-30 16:38:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:07,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:07,359 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 16:38:07,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125436506] [2023-08-30 16:38:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125436506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:07,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:07,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:38:07,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404753707] [2023-08-30 16:38:07,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:07,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:38:07,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:07,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:38:07,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:38:07,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 16:38:07,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 347 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:07,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:07,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 16:38:07,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:08,329 INFO L130 PetriNetUnfolder]: 11925/16849 cut-off events. [2023-08-30 16:38:08,330 INFO L131 PetriNetUnfolder]: For 28615/28615 co-relation queries the response was YES. [2023-08-30 16:38:08,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59534 conditions, 16849 events. 11925/16849 cut-off events. For 28615/28615 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 110411 event pairs, 2241 based on Foata normal form. 954/15750 useless extension candidates. Maximal degree in co-relation 33950. Up to 13484 conditions per place. [2023-08-30 16:38:08,419 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 64 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-30 16:38:08,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 619 flow [2023-08-30 16:38:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-08-30 16:38:08,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48344370860927155 [2023-08-30 16:38:08,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-08-30 16:38:08,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-08-30 16:38:08,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:08,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-08-30 16:38:08,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:08,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:08,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:08,423 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 347 flow. Second operand 3 states and 219 transitions. [2023-08-30 16:38:08,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 619 flow [2023-08-30 16:38:08,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 71 transitions, 585 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:38:08,458 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 317 flow [2023-08-30 16:38:08,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-08-30 16:38:08,458 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-08-30 16:38:08,458 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 317 flow [2023-08-30 16:38:08,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:08,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:08,459 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:08,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 16:38:08,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:08,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:08,459 INFO L85 PathProgramCache]: Analyzing trace with hash -687810609, now seen corresponding path program 1 times [2023-08-30 16:38:08,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:08,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569445659] [2023-08-30 16:38:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:08,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 16:38:08,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569445659] [2023-08-30 16:38:08,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569445659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:08,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:08,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:08,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617487348] [2023-08-30 16:38:08,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:08,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:08,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:08,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 16:38:08,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:08,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:08,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 16:38:08,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:09,602 INFO L130 PetriNetUnfolder]: 14852/22111 cut-off events. [2023-08-30 16:38:09,602 INFO L131 PetriNetUnfolder]: For 37417/37417 co-relation queries the response was YES. [2023-08-30 16:38:09,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72697 conditions, 22111 events. 14852/22111 cut-off events. For 37417/37417 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 160692 event pairs, 5610 based on Foata normal form. 0/19811 useless extension candidates. Maximal degree in co-relation 41806. Up to 14769 conditions per place. [2023-08-30 16:38:09,741 INFO L137 encePairwiseOnDemand]: 144/151 looper letters, 47 selfloop transitions, 29 changer transitions 0/79 dead transitions. [2023-08-30 16:38:09,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 684 flow [2023-08-30 16:38:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:09,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-08-30 16:38:09,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48123620309050774 [2023-08-30 16:38:09,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-08-30 16:38:09,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-08-30 16:38:09,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:09,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-08-30 16:38:09,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:09,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:09,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:09,744 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 317 flow. Second operand 3 states and 218 transitions. [2023-08-30 16:38:09,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 684 flow [2023-08-30 16:38:09,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 79 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:38:09,762 INFO L231 Difference]: Finished difference. Result has 46 places, 69 transitions, 647 flow [2023-08-30 16:38:09,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=647, PETRI_PLACES=46, PETRI_TRANSITIONS=69} [2023-08-30 16:38:09,762 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-08-30 16:38:09,763 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 69 transitions, 647 flow [2023-08-30 16:38:09,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:09,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:09,763 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:09,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 16:38:09,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:09,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:09,764 INFO L85 PathProgramCache]: Analyzing trace with hash 152710850, now seen corresponding path program 1 times [2023-08-30 16:38:09,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:09,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967578459] [2023-08-30 16:38:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:09,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 16:38:09,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:09,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967578459] [2023-08-30 16:38:09,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967578459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:09,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:09,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:38:09,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470881393] [2023-08-30 16:38:09,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:09,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:38:09,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:09,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:38:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:38:09,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 16:38:09,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 69 transitions, 647 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 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 16:38:09,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:09,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 16:38:09,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:10,946 INFO L130 PetriNetUnfolder]: 11939/17421 cut-off events. [2023-08-30 16:38:10,946 INFO L131 PetriNetUnfolder]: For 46459/46459 co-relation queries the response was YES. [2023-08-30 16:38:10,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69793 conditions, 17421 events. 11939/17421 cut-off events. For 46459/46459 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 121189 event pairs, 2639 based on Foata normal form. 1012/17369 useless extension candidates. Maximal degree in co-relation 39980. Up to 13486 conditions per place. [2023-08-30 16:38:11,058 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 84 selfloop transitions, 8 changer transitions 2/97 dead transitions. [2023-08-30 16:38:11,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 97 transitions, 1070 flow [2023-08-30 16:38:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-08-30 16:38:11,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4768211920529801 [2023-08-30 16:38:11,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-08-30 16:38:11,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-08-30 16:38:11,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:11,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-08-30 16:38:11,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:11,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:11,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:11,061 INFO L175 Difference]: Start difference. First operand has 46 places, 69 transitions, 647 flow. Second operand 3 states and 216 transitions. [2023-08-30 16:38:11,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 97 transitions, 1070 flow [2023-08-30 16:38:11,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 97 transitions, 1012 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:38:11,120 INFO L231 Difference]: Finished difference. Result has 45 places, 67 transitions, 599 flow [2023-08-30 16:38:11,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=599, PETRI_PLACES=45, PETRI_TRANSITIONS=67} [2023-08-30 16:38:11,121 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2023-08-30 16:38:11,121 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 67 transitions, 599 flow [2023-08-30 16:38:11,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 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 16:38:11,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:11,122 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:11,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 16:38:11,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:11,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1776945347, now seen corresponding path program 1 times [2023-08-30 16:38:11,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:11,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43854699] [2023-08-30 16:38:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:11,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 16:38:11,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:11,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43854699] [2023-08-30 16:38:11,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43854699] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:11,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:11,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:11,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758415411] [2023-08-30 16:38:11,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:11,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:11,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:11,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:11,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 16:38:11,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 67 transitions, 599 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:11,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:11,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 16:38:11,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:12,093 INFO L130 PetriNetUnfolder]: 9027/14711 cut-off events. [2023-08-30 16:38:12,093 INFO L131 PetriNetUnfolder]: For 39079/39079 co-relation queries the response was YES. [2023-08-30 16:38:12,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55709 conditions, 14711 events. 9027/14711 cut-off events. For 39079/39079 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 114392 event pairs, 4197 based on Foata normal form. 512/15183 useless extension candidates. Maximal degree in co-relation 29701. Up to 11572 conditions per place. [2023-08-30 16:38:12,167 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 53 selfloop transitions, 47 changer transitions 1/104 dead transitions. [2023-08-30 16:38:12,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 104 transitions, 1179 flow [2023-08-30 16:38:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-08-30 16:38:12,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47019867549668876 [2023-08-30 16:38:12,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-08-30 16:38:12,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-08-30 16:38:12,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:12,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-08-30 16:38:12,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 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 16:38:12,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:12,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:12,171 INFO L175 Difference]: Start difference. First operand has 45 places, 67 transitions, 599 flow. Second operand 3 states and 213 transitions. [2023-08-30 16:38:12,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 104 transitions, 1179 flow [2023-08-30 16:38:12,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 104 transitions, 1163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:38:12,195 INFO L231 Difference]: Finished difference. Result has 46 places, 98 transitions, 1140 flow [2023-08-30 16:38:12,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1140, PETRI_PLACES=46, PETRI_TRANSITIONS=98} [2023-08-30 16:38:12,195 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-08-30 16:38:12,195 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 98 transitions, 1140 flow [2023-08-30 16:38:12,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:12,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:12,196 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:12,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-30 16:38:12,196 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:38:12,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash -749266110, now seen corresponding path program 1 times [2023-08-30 16:38:12,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:12,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535470790] [2023-08-30 16:38:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:12,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 16:38:12,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:12,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535470790] [2023-08-30 16:38:12,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535470790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:12,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:12,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:38:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698611360] [2023-08-30 16:38:12,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:12,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:38:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:38:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:38:12,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-30 16:38:12,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 98 transitions, 1140 flow. Second operand has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:12,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:12,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-30 16:38:12,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:12,890 INFO L130 PetriNetUnfolder]: 6714/11536 cut-off events. [2023-08-30 16:38:12,890 INFO L131 PetriNetUnfolder]: For 46137/46137 co-relation queries the response was YES. [2023-08-30 16:38:12,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48772 conditions, 11536 events. 6714/11536 cut-off events. For 46137/46137 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 92621 event pairs, 2439 based on Foata normal form. 862/12358 useless extension candidates. Maximal degree in co-relation 26247. Up to 5592 conditions per place. [2023-08-30 16:38:12,923 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 0 selfloop transitions, 0 changer transitions 134/134 dead transitions. [2023-08-30 16:38:12,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 134 transitions, 1796 flow [2023-08-30 16:38:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-30 16:38:12,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46799116997792495 [2023-08-30 16:38:12,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-30 16:38:12,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-30 16:38:12,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:12,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-30 16:38:12,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 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 16:38:12,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:12,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:12,926 INFO L175 Difference]: Start difference. First operand has 46 places, 98 transitions, 1140 flow. Second operand 3 states and 212 transitions. [2023-08-30 16:38:12,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 134 transitions, 1796 flow [2023-08-30 16:38:12,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 134 transitions, 1749 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:38:12,969 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-30 16:38:12,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-30 16:38:12,969 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-08-30 16:38:12,970 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-30 16:38:12,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:12,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-30 16:38:12,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 16:38:12,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 16:38:12,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 16:38:12,971 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 16:38:12,971 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 16:38:12,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-30 16:38:12,971 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:12,971 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:38:12,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 88 transitions, 221 flow [2023-08-30 16:38:12,981 INFO L130 PetriNetUnfolder]: 6/146 cut-off events. [2023-08-30 16:38:12,981 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:38:12,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 146 events. 6/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 260 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 135. Up to 12 conditions per place. [2023-08-30 16:38:12,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 88 transitions, 221 flow [2023-08-30 16:38:12,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 82 transitions, 209 flow [2023-08-30 16:38:12,983 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:12,983 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 82 transitions, 209 flow [2023-08-30 16:38:12,983 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 82 transitions, 209 flow [2023-08-30 16:38:12,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 82 transitions, 209 flow [2023-08-30 16:38:12,990 INFO L130 PetriNetUnfolder]: 0/110 cut-off events. [2023-08-30 16:38:12,990 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:38:12,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 110 events. 0/110 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 139 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-08-30 16:38:12,992 INFO L119 LiptonReduction]: Number of co-enabled transitions 3410 [2023-08-30 16:38:14,127 INFO L134 LiptonReduction]: Checked pairs total: 5293 [2023-08-30 16:38:14,127 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-30 16:38:14,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:38:14,128 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:14,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:38:14,131 INFO L130 PetriNetUnfolder]: 0/31 cut-off events. [2023-08-30 16:38:14,131 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:38:14,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:14,131 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:14,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:38:14,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:14,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1618415845, now seen corresponding path program 1 times [2023-08-30 16:38:14,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:14,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128734873] [2023-08-30 16:38:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:14,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:14,142 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:38:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:14,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:38:14,150 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:38:14,150 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:38:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 16:38:14,150 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:38:14,151 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:38:14,151 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:38:14,151 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 16:38:14,163 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:38:14,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 100 transitions, 260 flow [2023-08-30 16:38:14,175 INFO L130 PetriNetUnfolder]: 7/170 cut-off events. [2023-08-30 16:38:14,175 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:38:14,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 7/170 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 165. Up to 14 conditions per place. [2023-08-30 16:38:14,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 100 transitions, 260 flow [2023-08-30 16:38:14,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 100 transitions, 260 flow [2023-08-30 16:38:14,177 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:14,177 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 100 transitions, 260 flow [2023-08-30 16:38:14,177 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 100 transitions, 260 flow [2023-08-30 16:38:14,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 100 transitions, 260 flow [2023-08-30 16:38:14,185 INFO L130 PetriNetUnfolder]: 7/170 cut-off events. [2023-08-30 16:38:14,185 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:38:14,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 7/170 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 165. Up to 14 conditions per place. [2023-08-30 16:38:14,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 5676 [2023-08-30 16:38:15,309 INFO L134 LiptonReduction]: Checked pairs total: 8035 [2023-08-30 16:38:15,309 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-08-30 16:38:15,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:38:15,311 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:15,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 16:38:15,312 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 16:38:15,312 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:15,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:15,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:38:15,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:38:15,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:15,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1073937970, now seen corresponding path program 1 times [2023-08-30 16:38:15,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:15,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723260177] [2023-08-30 16:38:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:15,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:15,330 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 16:38:15,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:15,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723260177] [2023-08-30 16:38:15,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723260177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:15,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:15,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:15,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643801354] [2023-08-30 16:38:15,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:15,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:15,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:15,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:15,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:15,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:38:15,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 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 16:38:15,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:15,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:38:15,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:18,638 INFO L130 PetriNetUnfolder]: 62014/82081 cut-off events. [2023-08-30 16:38:18,638 INFO L131 PetriNetUnfolder]: For 52408/52408 co-relation queries the response was YES. [2023-08-30 16:38:18,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180152 conditions, 82081 events. 62014/82081 cut-off events. For 52408/52408 co-relation queries the response was YES. Maximal size of possible extension queue 4290. Compared 525164 event pairs, 35952 based on Foata normal form. 0/59906 useless extension candidates. Maximal degree in co-relation 38661. Up to 54027 conditions per place. [2023-08-30 16:38:19,074 INFO L137 encePairwiseOnDemand]: 162/171 looper letters, 41 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-08-30 16:38:19,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 303 flow [2023-08-30 16:38:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-08-30 16:38:19,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2023-08-30 16:38:19,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-08-30 16:38:19,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-08-30 16:38:19,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:19,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-08-30 16:38:19,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:19,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:19,078 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:19,078 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 120 flow. Second operand 3 states and 261 transitions. [2023-08-30 16:38:19,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 303 flow [2023-08-30 16:38:19,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 253 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-08-30 16:38:19,106 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 142 flow [2023-08-30 16:38:19,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2023-08-30 16:38:19,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-30 16:38:19,106 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 142 flow [2023-08-30 16:38:19,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 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 16:38:19,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:19,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:19,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-30 16:38:19,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:38:19,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2006013177, now seen corresponding path program 1 times [2023-08-30 16:38:19,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:19,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111772228] [2023-08-30 16:38:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:19,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:19,119 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 16:38:19,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:19,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111772228] [2023-08-30 16:38:19,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111772228] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:19,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:19,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:19,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336639005] [2023-08-30 16:38:19,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:19,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:19,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:19,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:38:19,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:19,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:19,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:38:19,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:26,089 INFO L130 PetriNetUnfolder]: 87642/116859 cut-off events. [2023-08-30 16:38:26,089 INFO L131 PetriNetUnfolder]: For 63799/63799 co-relation queries the response was YES. [2023-08-30 16:38:26,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296134 conditions, 116859 events. 87642/116859 cut-off events. For 63799/63799 co-relation queries the response was YES. Maximal size of possible extension queue 6344. Compared 797094 event pairs, 43070 based on Foata normal form. 0/90803 useless extension candidates. Maximal degree in co-relation 140390. Up to 77979 conditions per place. [2023-08-30 16:38:26,942 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 46 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2023-08-30 16:38:26,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 366 flow [2023-08-30 16:38:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-08-30 16:38:26,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029239766081871 [2023-08-30 16:38:26,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-08-30 16:38:26,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-08-30 16:38:26,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:26,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-08-30 16:38:26,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:26,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:26,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:26,945 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 142 flow. Second operand 3 states and 258 transitions. [2023-08-30 16:38:26,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 366 flow [2023-08-30 16:38:28,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:38:28,496 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 236 flow [2023-08-30 16:38:28,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-08-30 16:38:28,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-08-30 16:38:28,497 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 236 flow [2023-08-30 16:38:28,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:28,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:28,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:28,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-30 16:38:28,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:38:28,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:28,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2058973423, now seen corresponding path program 1 times [2023-08-30 16:38:28,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:28,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033845043] [2023-08-30 16:38:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:28,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:38:28,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:28,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033845043] [2023-08-30 16:38:28,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033845043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:28,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:28,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:38:28,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749672692] [2023-08-30 16:38:28,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:28,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:38:28,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:28,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:38:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:38:28,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:38:28,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:28,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:28,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:38:28,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:33,569 INFO L130 PetriNetUnfolder]: 71236/92293 cut-off events. [2023-08-30 16:38:33,569 INFO L131 PetriNetUnfolder]: For 80427/80427 co-relation queries the response was YES. [2023-08-30 16:38:33,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272367 conditions, 92293 events. 71236/92293 cut-off events. For 80427/80427 co-relation queries the response was YES. Maximal size of possible extension queue 5175. Compared 592847 event pairs, 13780 based on Foata normal form. 0/74045 useless extension candidates. Maximal degree in co-relation 272311. Up to 74462 conditions per place. [2023-08-30 16:38:34,151 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 65 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-30 16:38:34,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 497 flow [2023-08-30 16:38:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-30 16:38:34,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5009746588693957 [2023-08-30 16:38:34,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-30 16:38:34,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-30 16:38:34,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:34,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-30 16:38:34,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 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 16:38:34,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:34,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:34,155 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 236 flow. Second operand 3 states and 257 transitions. [2023-08-30 16:38:34,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 497 flow [2023-08-30 16:38:35,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:38:35,478 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 212 flow [2023-08-30 16:38:35,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-30 16:38:35,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-30 16:38:35,478 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 212 flow [2023-08-30 16:38:35,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:35,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:35,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:35,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-30 16:38:35,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:38:35,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:35,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2056869807, now seen corresponding path program 1 times [2023-08-30 16:38:35,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:35,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475948803] [2023-08-30 16:38:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:35,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:35,522 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 16:38:35,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:35,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475948803] [2023-08-30 16:38:35,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475948803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:35,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:35,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:38:35,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975975711] [2023-08-30 16:38:35,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:35,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:38:35,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:35,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:38:35,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:38:35,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:38:35,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:35,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:35,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:38:35,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:39,838 INFO L130 PetriNetUnfolder]: 57777/75233 cut-off events. [2023-08-30 16:38:39,838 INFO L131 PetriNetUnfolder]: For 53296/53296 co-relation queries the response was YES. [2023-08-30 16:38:40,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214572 conditions, 75233 events. 57777/75233 cut-off events. For 53296/53296 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 473714 event pairs, 9807 based on Foata normal form. 0/60115 useless extension candidates. Maximal degree in co-relation 113375. Up to 60562 conditions per place. [2023-08-30 16:38:40,283 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 62 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-30 16:38:40,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 446 flow [2023-08-30 16:38:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-08-30 16:38:40,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951267056530214 [2023-08-30 16:38:40,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-08-30 16:38:40,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-08-30 16:38:40,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:40,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-08-30 16:38:40,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:40,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:40,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:40,285 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 212 flow. Second operand 3 states and 254 transitions. [2023-08-30 16:38:40,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 446 flow [2023-08-30 16:38:40,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:38:40,296 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 210 flow [2023-08-30 16:38:40,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-30 16:38:40,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-30 16:38:40,297 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 210 flow [2023-08-30 16:38:40,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:40,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:40,297 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:40,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-30 16:38:40,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:38:40,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:40,298 INFO L85 PathProgramCache]: Analyzing trace with hash -86503249, now seen corresponding path program 1 times [2023-08-30 16:38:40,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:40,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037435083] [2023-08-30 16:38:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:40,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:40,313 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 16:38:40,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:40,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037435083] [2023-08-30 16:38:40,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037435083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:40,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:40,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:40,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639154716] [2023-08-30 16:38:40,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:40,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:40,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:40,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:40,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:40,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:38:40,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:40,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:40,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:38:40,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:46,360 INFO L130 PetriNetUnfolder]: 78368/106611 cut-off events. [2023-08-30 16:38:46,360 INFO L131 PetriNetUnfolder]: For 99801/99801 co-relation queries the response was YES. [2023-08-30 16:38:46,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301471 conditions, 106611 events. 78368/106611 cut-off events. For 99801/99801 co-relation queries the response was YES. Maximal size of possible extension queue 6232. Compared 759267 event pairs, 34508 based on Foata normal form. 0/87014 useless extension candidates. Maximal degree in co-relation 167263. Up to 72725 conditions per place. [2023-08-30 16:38:47,101 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 50 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2023-08-30 16:38:47,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 507 flow [2023-08-30 16:38:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-08-30 16:38:47,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49317738791423 [2023-08-30 16:38:47,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-08-30 16:38:47,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-08-30 16:38:47,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:47,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-08-30 16:38:47,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:47,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:47,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:47,105 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 210 flow. Second operand 3 states and 253 transitions. [2023-08-30 16:38:47,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 507 flow [2023-08-30 16:38:47,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 74 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:38:47,121 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 430 flow [2023-08-30 16:38:47,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2023-08-30 16:38:47,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2023-08-30 16:38:47,122 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 430 flow [2023-08-30 16:38:47,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:47,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:47,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:47,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-30 16:38:47,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:38:47,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:47,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1613370371, now seen corresponding path program 1 times [2023-08-30 16:38:47,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:47,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777543229] [2023-08-30 16:38:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:47,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:47,163 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 16:38:47,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:47,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777543229] [2023-08-30 16:38:47,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777543229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:47,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:47,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:38:47,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749840291] [2023-08-30 16:38:47,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:47,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:38:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:38:47,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:38:47,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:38:47,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:47,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:47,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:38:47,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:52,181 INFO L130 PetriNetUnfolder]: 63123/83371 cut-off events. [2023-08-30 16:38:52,181 INFO L131 PetriNetUnfolder]: For 140677/140677 co-relation queries the response was YES. [2023-08-30 16:38:52,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290089 conditions, 83371 events. 63123/83371 cut-off events. For 140677/140677 co-relation queries the response was YES. Maximal size of possible extension queue 5044. Compared 555386 event pairs, 11449 based on Foata normal form. 4008/74526 useless extension candidates. Maximal degree in co-relation 157443. Up to 66634 conditions per place. [2023-08-30 16:38:52,740 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 82 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-08-30 16:38:52,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 89 transitions, 781 flow [2023-08-30 16:38:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-08-30 16:38:52,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48927875243664715 [2023-08-30 16:38:52,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-08-30 16:38:52,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-08-30 16:38:52,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:52,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-08-30 16:38:52,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:52,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:52,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:52,744 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 430 flow. Second operand 3 states and 251 transitions. [2023-08-30 16:38:52,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 89 transitions, 781 flow [2023-08-30 16:38:53,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 739 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:38:53,058 INFO L231 Difference]: Finished difference. Result has 49 places, 59 transitions, 392 flow [2023-08-30 16:38:53,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=49, PETRI_TRANSITIONS=59} [2023-08-30 16:38:53,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2023-08-30 16:38:53,060 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 59 transitions, 392 flow [2023-08-30 16:38:53,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:53,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:53,060 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:53,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-30 16:38:53,060 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:38:53,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:53,061 INFO L85 PathProgramCache]: Analyzing trace with hash -943953467, now seen corresponding path program 1 times [2023-08-30 16:38:53,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:53,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478836183] [2023-08-30 16:38:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:53,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 16:38:53,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:53,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478836183] [2023-08-30 16:38:53,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478836183] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:53,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:53,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:53,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544766323] [2023-08-30 16:38:53,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:53,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:53,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:53,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:53,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:38:53,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:53,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:53,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:38:53,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:59,910 INFO L130 PetriNetUnfolder]: 82894/114621 cut-off events. [2023-08-30 16:38:59,910 INFO L131 PetriNetUnfolder]: For 202351/202351 co-relation queries the response was YES. [2023-08-30 16:39:00,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372683 conditions, 114621 events. 82894/114621 cut-off events. For 202351/202351 co-relation queries the response was YES. Maximal size of possible extension queue 7139. Compared 856344 event pairs, 32594 based on Foata normal form. 0/98741 useless extension candidates. Maximal degree in co-relation 216934. Up to 78927 conditions per place. [2023-08-30 16:39:00,945 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 61 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2023-08-30 16:39:00,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 101 transitions, 878 flow [2023-08-30 16:39:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:39:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:39:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-08-30 16:39:00,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873294346978557 [2023-08-30 16:39:00,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-08-30 16:39:00,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-08-30 16:39:00,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:00,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-08-30 16:39:00,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 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 16:39:00,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:00,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:00,948 INFO L175 Difference]: Start difference. First operand has 49 places, 59 transitions, 392 flow. Second operand 3 states and 250 transitions. [2023-08-30 16:39:00,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 101 transitions, 878 flow [2023-08-30 16:39:01,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 101 transitions, 870 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:39:01,003 INFO L231 Difference]: Finished difference. Result has 52 places, 88 transitions, 834 flow [2023-08-30 16:39:01,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=834, PETRI_PLACES=52, PETRI_TRANSITIONS=88} [2023-08-30 16:39:01,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2023-08-30 16:39:01,004 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 88 transitions, 834 flow [2023-08-30 16:39:01,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:01,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:01,005 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:01,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-30 16:39:01,005 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:39:01,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:01,005 INFO L85 PathProgramCache]: Analyzing trace with hash 802217750, now seen corresponding path program 1 times [2023-08-30 16:39:01,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:01,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572808984] [2023-08-30 16:39:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:01,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 16:39:01,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:01,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572808984] [2023-08-30 16:39:01,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572808984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:01,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:01,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:39:01,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504347295] [2023-08-30 16:39:01,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:01,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:39:01,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:39:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:39:01,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:39:01,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 88 transitions, 834 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:01,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:01,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:39:01,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:06,895 INFO L130 PetriNetUnfolder]: 66491/89377 cut-off events. [2023-08-30 16:39:06,895 INFO L131 PetriNetUnfolder]: For 243725/243725 co-relation queries the response was YES. [2023-08-30 16:39:07,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353392 conditions, 89377 events. 66491/89377 cut-off events. For 243725/243725 co-relation queries the response was YES. Maximal size of possible extension queue 5781. Compared 627164 event pairs, 13367 based on Foata normal form. 4542/84597 useless extension candidates. Maximal degree in co-relation 208656. Up to 70760 conditions per place. [2023-08-30 16:39:07,551 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 117 selfloop transitions, 8 changer transitions 0/128 dead transitions. [2023-08-30 16:39:07,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 128 transitions, 1420 flow [2023-08-30 16:39:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:39:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:39:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-08-30 16:39:07,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834307992202729 [2023-08-30 16:39:07,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-08-30 16:39:07,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-08-30 16:39:07,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:07,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-08-30 16:39:07,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 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 16:39:07,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:07,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:07,553 INFO L175 Difference]: Start difference. First operand has 52 places, 88 transitions, 834 flow. Second operand 3 states and 248 transitions. [2023-08-30 16:39:07,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 128 transitions, 1420 flow [2023-08-30 16:39:08,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 128 transitions, 1346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:39:08,055 INFO L231 Difference]: Finished difference. Result has 51 places, 87 transitions, 772 flow [2023-08-30 16:39:08,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=772, PETRI_PLACES=51, PETRI_TRANSITIONS=87} [2023-08-30 16:39:08,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2023-08-30 16:39:08,055 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 87 transitions, 772 flow [2023-08-30 16:39:08,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:08,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:08,056 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:08,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-30 16:39:08,056 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:39:08,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:08,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1874581621, now seen corresponding path program 1 times [2023-08-30 16:39:08,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:08,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000589716] [2023-08-30 16:39:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:08,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 16:39:08,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:08,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000589716] [2023-08-30 16:39:08,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000589716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:08,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:08,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:39:08,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004212664] [2023-08-30 16:39:08,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:08,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:39:08,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:39:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:39:08,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:39:08,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 87 transitions, 772 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:08,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:08,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:39:08,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:16,161 INFO L130 PetriNetUnfolder]: 83744/117939 cut-off events. [2023-08-30 16:39:16,161 INFO L131 PetriNetUnfolder]: For 338138/338138 co-relation queries the response was YES. [2023-08-30 16:39:16,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437267 conditions, 117939 events. 83744/117939 cut-off events. For 338138/338138 co-relation queries the response was YES. Maximal size of possible extension queue 7940. Compared 918306 event pairs, 30074 based on Foata normal form. 0/107390 useless extension candidates. Maximal degree in co-relation 245905. Up to 82253 conditions per place. [2023-08-30 16:39:17,021 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 80 selfloop transitions, 65 changer transitions 0/148 dead transitions. [2023-08-30 16:39:17,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 148 transitions, 1629 flow [2023-08-30 16:39:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:39:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:39:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-30 16:39:17,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-30 16:39:17,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-30 16:39:17,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-30 16:39:17,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:17,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-30 16:39:17,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:17,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:17,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:17,024 INFO L175 Difference]: Start difference. First operand has 51 places, 87 transitions, 772 flow. Second operand 3 states and 247 transitions. [2023-08-30 16:39:17,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 148 transitions, 1629 flow [2023-08-30 16:39:17,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 148 transitions, 1613 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:39:17,169 INFO L231 Difference]: Finished difference. Result has 54 places, 136 transitions, 1638 flow [2023-08-30 16:39:17,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1638, PETRI_PLACES=54, PETRI_TRANSITIONS=136} [2023-08-30 16:39:17,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2023-08-30 16:39:17,170 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 136 transitions, 1638 flow [2023-08-30 16:39:17,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:17,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:17,170 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:17,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-30 16:39:17,171 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:39:17,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2017507408, now seen corresponding path program 1 times [2023-08-30 16:39:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:17,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919631845] [2023-08-30 16:39:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:17,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 16:39:17,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:17,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919631845] [2023-08-30 16:39:17,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919631845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:17,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:17,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:39:17,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949152211] [2023-08-30 16:39:17,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:17,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:39:17,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:17,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:39:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:39:17,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:39:17,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 136 transitions, 1638 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:17,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:17,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:39:17,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:24,211 INFO L130 PetriNetUnfolder]: 67349/92869 cut-off events. [2023-08-30 16:39:24,211 INFO L131 PetriNetUnfolder]: For 378525/378525 co-relation queries the response was YES. [2023-08-30 16:39:24,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412575 conditions, 92869 events. 67349/92869 cut-off events. For 378525/378525 co-relation queries the response was YES. Maximal size of possible extension queue 6428. Compared 687339 event pairs, 15691 based on Foata normal form. 4796/92936 useless extension candidates. Maximal degree in co-relation 225959. Up to 70802 conditions per place. [2023-08-30 16:39:24,881 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 173 selfloop transitions, 16 changer transitions 2/194 dead transitions. [2023-08-30 16:39:24,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 194 transitions, 2657 flow [2023-08-30 16:39:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:39:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:39:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-08-30 16:39:24,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775828460038986 [2023-08-30 16:39:24,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-08-30 16:39:24,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-08-30 16:39:24,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:24,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-08-30 16:39:24,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:24,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:24,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:24,884 INFO L175 Difference]: Start difference. First operand has 54 places, 136 transitions, 1638 flow. Second operand 3 states and 245 transitions. [2023-08-30 16:39:24,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 194 transitions, 2657 flow [2023-08-30 16:39:25,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 194 transitions, 2527 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:39:25,491 INFO L231 Difference]: Finished difference. Result has 53 places, 134 transitions, 1534 flow [2023-08-30 16:39:25,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1534, PETRI_PLACES=53, PETRI_TRANSITIONS=134} [2023-08-30 16:39:25,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-08-30 16:39:25,492 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 134 transitions, 1534 flow [2023-08-30 16:39:25,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:25,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:25,492 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:25,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-30 16:39:25,493 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:39:25,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:25,493 INFO L85 PathProgramCache]: Analyzing trace with hash 298586785, now seen corresponding path program 1 times [2023-08-30 16:39:25,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:25,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181911014] [2023-08-30 16:39:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:25,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-30 16:39:25,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181911014] [2023-08-30 16:39:25,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181911014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:25,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:25,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:39:25,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129611966] [2023-08-30 16:39:25,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:25,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:39:25,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:25,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:39:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:39:25,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:39:25,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 134 transitions, 1534 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:25,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:25,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:39:25,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:31,585 INFO L130 PetriNetUnfolder]: 53101/79979 cut-off events. [2023-08-30 16:39:31,585 INFO L131 PetriNetUnfolder]: For 334741/334741 co-relation queries the response was YES. [2023-08-30 16:39:31,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338343 conditions, 79979 events. 53101/79979 cut-off events. For 334741/334741 co-relation queries the response was YES. Maximal size of possible extension queue 5480. Compared 669193 event pairs, 23193 based on Foata normal form. 2048/81906 useless extension candidates. Maximal degree in co-relation 191988. Up to 65010 conditions per place. [2023-08-30 16:39:32,153 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 105 selfloop transitions, 111 changer transitions 1/220 dead transitions. [2023-08-30 16:39:32,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 220 transitions, 3046 flow [2023-08-30 16:39:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:39:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:39:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-30 16:39:32,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47173489278752434 [2023-08-30 16:39:32,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-30 16:39:32,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-30 16:39:32,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:32,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-30 16:39:32,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:32,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:32,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:32,156 INFO L175 Difference]: Start difference. First operand has 53 places, 134 transitions, 1534 flow. Second operand 3 states and 242 transitions. [2023-08-30 16:39:32,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 220 transitions, 3046 flow [2023-08-30 16:39:32,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 220 transitions, 3014 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:39:32,455 INFO L231 Difference]: Finished difference. Result has 54 places, 213 transitions, 3041 flow [2023-08-30 16:39:32,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3041, PETRI_PLACES=54, PETRI_TRANSITIONS=213} [2023-08-30 16:39:32,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2023-08-30 16:39:32,456 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 213 transitions, 3041 flow [2023-08-30 16:39:32,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:32,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:32,457 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:32,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-30 16:39:32,457 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:39:32,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash 666260888, now seen corresponding path program 1 times [2023-08-30 16:39:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:32,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106367] [2023-08-30 16:39:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:32,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-30 16:39:32,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106367] [2023-08-30 16:39:32,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:32,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:32,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:39:32,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712254355] [2023-08-30 16:39:32,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:32,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:39:32,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:32,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:39:32,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:39:32,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-30 16:39:32,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 213 transitions, 3041 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:32,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:32,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-30 16:39:32,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:37,757 INFO L130 PetriNetUnfolder]: 39848/62604 cut-off events. [2023-08-30 16:39:37,757 INFO L131 PetriNetUnfolder]: For 369027/369027 co-relation queries the response was YES. [2023-08-30 16:39:37,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293784 conditions, 62604 events. 39848/62604 cut-off events. For 369027/369027 co-relation queries the response was YES. Maximal size of possible extension queue 4143. Compared 543942 event pairs, 13951 based on Foata normal form. 4122/66605 useless extension candidates. Maximal degree in co-relation 166648. Up to 31846 conditions per place. [2023-08-30 16:39:38,042 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 0 selfloop transitions, 0 changer transitions 298/298 dead transitions. [2023-08-30 16:39:38,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 298 transitions, 4794 flow [2023-08-30 16:39:38,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:39:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:39:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-08-30 16:39:38,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697855750487329 [2023-08-30 16:39:38,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-08-30 16:39:38,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-08-30 16:39:38,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:38,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-08-30 16:39:38,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:38,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:38,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:38,046 INFO L175 Difference]: Start difference. First operand has 54 places, 213 transitions, 3041 flow. Second operand 3 states and 241 transitions. [2023-08-30 16:39:38,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 298 transitions, 4794 flow [2023-08-30 16:39:38,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 298 transitions, 4683 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:39:38,636 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-30 16:39:38,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-30 16:39:38,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2023-08-30 16:39:38,637 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-30 16:39:38,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:38,637 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-08-30 16:39:38,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 16:39:38,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-30 16:39:38,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 16:39:38,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 16:39:38,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 16:39:38,638 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 16:39:38,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-30 16:39:38,638 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:38,638 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:39:38,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 100 transitions, 260 flow [2023-08-30 16:39:38,647 INFO L130 PetriNetUnfolder]: 7/170 cut-off events. [2023-08-30 16:39:38,647 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:39:38,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 170 events. 7/170 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 165. Up to 14 conditions per place. [2023-08-30 16:39:38,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 100 transitions, 260 flow [2023-08-30 16:39:38,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 94 transitions, 248 flow [2023-08-30 16:39:38,648 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:39:38,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 94 transitions, 248 flow [2023-08-30 16:39:38,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 94 transitions, 248 flow [2023-08-30 16:39:38,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 94 transitions, 248 flow [2023-08-30 16:39:38,654 INFO L130 PetriNetUnfolder]: 0/128 cut-off events. [2023-08-30 16:39:38,654 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:39:38,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 128 events. 0/128 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-08-30 16:39:38,656 INFO L119 LiptonReduction]: Number of co-enabled transitions 4884 [2023-08-30 16:39:39,906 INFO L134 LiptonReduction]: Checked pairs total: 7175 [2023-08-30 16:39:39,906 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-30 16:39:39,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:39:39,907 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:39:39,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:39:39,910 INFO L130 PetriNetUnfolder]: 0/37 cut-off events. [2023-08-30 16:39:39,910 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:39:39,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:39,911 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:39,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:39:39,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:39,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1242046484, now seen corresponding path program 1 times [2023-08-30 16:39:39,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:39,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489328989] [2023-08-30 16:39:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:39,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:39:39,920 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:39:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:39:39,929 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:39:39,929 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:39:39,929 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:39:39,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-30 16:39:39,930 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:39:39,930 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:39:39,930 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:39:39,930 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-30 16:39:39,951 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:39:39,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 112 transitions, 301 flow [2023-08-30 16:39:39,964 INFO L130 PetriNetUnfolder]: 8/194 cut-off events. [2023-08-30 16:39:39,965 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:39:39,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 194 events. 8/194 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 386 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 197. Up to 16 conditions per place. [2023-08-30 16:39:39,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 112 transitions, 301 flow [2023-08-30 16:39:39,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 112 transitions, 301 flow [2023-08-30 16:39:39,966 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:39:39,967 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 112 transitions, 301 flow [2023-08-30 16:39:39,967 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 112 transitions, 301 flow [2023-08-30 16:39:39,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 112 transitions, 301 flow [2023-08-30 16:39:39,978 INFO L130 PetriNetUnfolder]: 8/194 cut-off events. [2023-08-30 16:39:39,978 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:39:39,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 194 events. 8/194 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 386 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 197. Up to 16 conditions per place. [2023-08-30 16:39:39,982 INFO L119 LiptonReduction]: Number of co-enabled transitions 7546 [2023-08-30 16:39:41,480 INFO L134 LiptonReduction]: Checked pairs total: 13087 [2023-08-30 16:39:41,480 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-30 16:39:41,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:39:41,481 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;@15d4403f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:39:41,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 16:39:41,482 INFO L130 PetriNetUnfolder]: 0/7 cut-off events. [2023-08-30 16:39:41,482 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:39:41,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:41,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:39:41,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:39:41,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1333559845, now seen corresponding path program 1 times [2023-08-30 16:39:41,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:41,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459045427] [2023-08-30 16:39:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:41,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:41,503 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 16:39:41,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:41,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459045427] [2023-08-30 16:39:41,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459045427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:41,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:41,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:39:41,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090485012] [2023-08-30 16:39:41,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:41,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:39:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:39:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:39:41,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:39:41,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:39:41,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:41,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:39:41,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:01,779 INFO L130 PetriNetUnfolder]: 297494/377965 cut-off events. [2023-08-30 16:40:01,779 INFO L131 PetriNetUnfolder]: For 287847/287847 co-relation queries the response was YES. [2023-08-30 16:40:02,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832316 conditions, 377965 events. 297494/377965 cut-off events. For 287847/287847 co-relation queries the response was YES. Maximal size of possible extension queue 16101. Compared 2472531 event pairs, 176580 based on Foata normal form. 0/272848 useless extension candidates. Maximal degree in co-relation 183188. Up to 254687 conditions per place. [2023-08-30 16:40:04,213 INFO L137 encePairwiseOnDemand]: 181/191 looper letters, 48 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2023-08-30 16:40:04,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 367 flow [2023-08-30 16:40:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:40:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:40:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-08-30 16:40:04,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113438045375218 [2023-08-30 16:40:04,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-08-30 16:40:04,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-08-30 16:40:04,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:04,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-08-30 16:40:04,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:40:04,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:40:04,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:40:04,216 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 145 flow. Second operand 3 states and 293 transitions. [2023-08-30 16:40:04,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 367 flow [2023-08-30 16:40:04,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 295 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-08-30 16:40:04,361 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 163 flow [2023-08-30 16:40:04,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-30 16:40:04,362 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-30 16:40:04,362 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 163 flow [2023-08-30 16:40:04,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:40:04,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:40:04,362 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:40:04,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-30 16:40:04,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:40:04,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:40:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1144329765, now seen corresponding path program 1 times [2023-08-30 16:40:04,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:40:04,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478798039] [2023-08-30 16:40:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:40:04,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:40:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:40:04,379 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 16:40:04,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:40:04,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478798039] [2023-08-30 16:40:04,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478798039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:40:04,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:40:04,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:40:04,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638126833] [2023-08-30 16:40:04,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:40:04,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:40:04,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:40:04,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:40:04,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:40:04,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:40:04,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:40:04,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:40:04,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:40:04,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:37,022 INFO L130 PetriNetUnfolder]: 423576/541309 cut-off events. [2023-08-30 16:40:37,022 INFO L131 PetriNetUnfolder]: For 286495/286495 co-relation queries the response was YES. [2023-08-30 16:40:38,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365244 conditions, 541309 events. 423576/541309 cut-off events. For 286495/286495 co-relation queries the response was YES. Maximal size of possible extension queue 23989. Compared 3735900 event pairs, 215810 based on Foata normal form. 0/413115 useless extension candidates. Maximal degree in co-relation 647466. Up to 370121 conditions per place. [2023-08-30 16:40:41,479 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 54 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2023-08-30 16:40:41,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 428 flow [2023-08-30 16:40:41,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:40:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:40:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-08-30 16:40:41,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506108202443281 [2023-08-30 16:40:41,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-08-30 16:40:41,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-08-30 16:40:41,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:41,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-08-30 16:40:41,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:40:41,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:40:41,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:40:41,483 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 163 flow. Second operand 3 states and 290 transitions. [2023-08-30 16:40:41,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 428 flow [2023-08-30 16:41:39,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:41:39,035 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 275 flow [2023-08-30 16:41:39,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-08-30 16:41:39,036 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-08-30 16:41:39,036 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 275 flow [2023-08-30 16:41:39,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:41:39,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:39,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:39,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-30 16:41:39,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:41:39,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1116827591, now seen corresponding path program 1 times [2023-08-30 16:41:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:39,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636234461] [2023-08-30 16:41:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:41:39,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:39,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636234461] [2023-08-30 16:41:39,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636234461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:41:39,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:41:39,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:41:39,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105666315] [2023-08-30 16:41:39,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:41:39,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:41:39,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:41:39,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:41:39,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:41:39,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 275 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:41:39,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:39,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:41:39,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:42:06,141 INFO L130 PetriNetUnfolder]: 345272/429917 cut-off events. [2023-08-30 16:42:06,142 INFO L131 PetriNetUnfolder]: For 362722/362722 co-relation queries the response was YES. [2023-08-30 16:42:07,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258871 conditions, 429917 events. 345272/429917 cut-off events. For 362722/362722 co-relation queries the response was YES. Maximal size of possible extension queue 19479. Compared 2779549 event pairs, 66448 based on Foata normal form. 0/337171 useless extension candidates. Maximal degree in co-relation 1258814. Up to 345956 conditions per place. [2023-08-30 16:42:09,501 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 77 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-30 16:42:09,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 585 flow [2023-08-30 16:42:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:42:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:42:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-08-30 16:42:09,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043630017452007 [2023-08-30 16:42:09,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-08-30 16:42:09,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-08-30 16:42:09,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:42:09,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-08-30 16:42:09,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:42:09,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:42:09,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:42:09,503 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 275 flow. Second operand 3 states and 289 transitions. [2023-08-30 16:42:09,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 585 flow [2023-08-30 16:42:58,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:42:58,174 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 247 flow [2023-08-30 16:42:58,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-08-30 16:42:58,174 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-08-30 16:42:58,174 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 247 flow [2023-08-30 16:42:58,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:42:58,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:42:58,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:42:58,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-30 16:42:58,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:42:58,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:42:58,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1114488652, now seen corresponding path program 1 times [2023-08-30 16:42:58,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:42:58,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903315038] [2023-08-30 16:42:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:42:58,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:42:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:42:58,196 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 16:42:58,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:42:58,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903315038] [2023-08-30 16:42:58,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903315038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:42:58,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:42:58,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:42:58,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601609281] [2023-08-30 16:42:58,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:42:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:42:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:42:58,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:42:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:42:58,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:42:58,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:42:58,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:42:58,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:42:58,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:43:19,140 INFO L130 PetriNetUnfolder]: 280909/351017 cut-off events. [2023-08-30 16:43:19,141 INFO L131 PetriNetUnfolder]: For 239234/239234 co-relation queries the response was YES. [2023-08-30 16:43:20,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992745 conditions, 351017 events. 280909/351017 cut-off events. For 239234/239234 co-relation queries the response was YES. Maximal size of possible extension queue 16167. Compared 2229218 event pairs, 48119 based on Foata normal form. 0/274201 useless extension candidates. Maximal degree in co-relation 532135. Up to 281912 conditions per place. [2023-08-30 16:43:21,659 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 74 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-30 16:43:21,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 528 flow [2023-08-30 16:43:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:43:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:43:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-08-30 16:43:21,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49912739965095987 [2023-08-30 16:43:21,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-08-30 16:43:21,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-08-30 16:43:21,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:43:21,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-08-30 16:43:21,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 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 16:43:21,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:43:21,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:43:21,662 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 247 flow. Second operand 3 states and 286 transitions. [2023-08-30 16:43:21,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 528 flow [2023-08-30 16:43:21,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:43:21,708 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 245 flow [2023-08-30 16:43:21,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-08-30 16:43:21,709 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-08-30 16:43:21,709 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 245 flow [2023-08-30 16:43:21,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:43:21,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:43:21,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 16:43:21,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-30 16:43:21,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:43:21,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:43:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1220283779, now seen corresponding path program 1 times [2023-08-30 16:43:21,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:43:21,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478915875] [2023-08-30 16:43:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:43:21,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:43:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:43:21,724 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 16:43:21,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:43:21,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478915875] [2023-08-30 16:43:21,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478915875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:43:21,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:43:21,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:43:21,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88685003] [2023-08-30 16:43:21,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:43:21,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:43:21,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:43:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:43:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:43:21,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:43:21,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:43:21,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:43:21,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:43:21,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:43:59,264 INFO L130 PetriNetUnfolder]: 385656/500287 cut-off events. [2023-08-30 16:43:59,264 INFO L131 PetriNetUnfolder]: For 463772/463772 co-relation queries the response was YES. [2023-08-30 16:44:01,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404945 conditions, 500287 events. 385656/500287 cut-off events. For 463772/463772 co-relation queries the response was YES. Maximal size of possible extension queue 23419. Compared 3597143 event pairs, 176836 based on Foata normal form. 0/398680 useless extension candidates. Maximal degree in co-relation 759541. Up to 349769 conditions per place. [2023-08-30 16:44:03,328 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 60 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2023-08-30 16:44:03,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 605 flow [2023-08-30 16:44:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:44:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:44:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-08-30 16:44:03,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973821989528796 [2023-08-30 16:44:03,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-08-30 16:44:03,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-08-30 16:44:03,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:44:03,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-08-30 16:44:03,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 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 16:44:03,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:44:03,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:44:03,331 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 245 flow. Second operand 3 states and 285 transitions. [2023-08-30 16:44:03,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 605 flow [2023-08-30 16:44:05,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 601 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:44:05,197 INFO L231 Difference]: Finished difference. Result has 56 places, 71 transitions, 513 flow [2023-08-30 16:44:05,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=56, PETRI_TRANSITIONS=71} [2023-08-30 16:44:05,197 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-08-30 16:44:05,198 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 71 transitions, 513 flow [2023-08-30 16:44:05,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:44:05,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:44:05,198 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:44:05,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-30 16:44:05,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:44:05,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:44:05,199 INFO L85 PathProgramCache]: Analyzing trace with hash -825903674, now seen corresponding path program 1 times [2023-08-30 16:44:05,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:44:05,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124683660] [2023-08-30 16:44:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:44:05,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:44:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:44:05,234 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 16:44:05,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:44:05,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124683660] [2023-08-30 16:44:05,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124683660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:44:05,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:44:05,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:44:05,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109339158] [2023-08-30 16:44:05,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:44:05,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:44:05,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:44:05,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:44:05,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:44:05,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:44:05,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 71 transitions, 513 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:44:05,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:44:05,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:44:05,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:44:31,349 INFO L130 PetriNetUnfolder]: 311645/393393 cut-off events. [2023-08-30 16:44:31,349 INFO L131 PetriNetUnfolder]: For 652015/652015 co-relation queries the response was YES. [2023-08-30 16:44:32,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350528 conditions, 393393 events. 311645/393393 cut-off events. For 652015/652015 co-relation queries the response was YES. Maximal size of possible extension queue 19046. Compared 2620483 event pairs, 55633 based on Foata normal form. 16278/339366 useless extension candidates. Maximal degree in co-relation 675481. Up to 313668 conditions per place. [2023-08-30 16:44:34,539 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 100 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-30 16:44:34,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 107 transitions, 943 flow [2023-08-30 16:44:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:44:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:44:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-30 16:44:34,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.493891797556719 [2023-08-30 16:44:34,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-30 16:44:34,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-30 16:44:34,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:44:34,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-30 16:44:34,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:44:34,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:44:34,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:44:34,541 INFO L175 Difference]: Start difference. First operand has 56 places, 71 transitions, 513 flow. Second operand 3 states and 283 transitions. [2023-08-30 16:44:34,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 107 transitions, 943 flow [2023-08-30 16:44:44,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 107 transitions, 893 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:44:44,876 INFO L231 Difference]: Finished difference. Result has 55 places, 70 transitions, 467 flow [2023-08-30 16:44:44,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=467, PETRI_PLACES=55, PETRI_TRANSITIONS=70} [2023-08-30 16:44:44,876 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2023-08-30 16:44:44,876 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 70 transitions, 467 flow [2023-08-30 16:44:44,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:44:44,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:44:44,877 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:44:44,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-08-30 16:44:44,877 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:44:44,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:44:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1018945546, now seen corresponding path program 1 times [2023-08-30 16:44:44,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:44:44,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42794555] [2023-08-30 16:44:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:44:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:44:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:44:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 16:44:44,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:44:44,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42794555] [2023-08-30 16:44:44,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42794555] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:44:44,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:44:44,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:44:44,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492060429] [2023-08-30 16:44:44,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:44:44,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:44:44,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:44:44,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:44:44,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:44:44,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:44:44,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 70 transitions, 467 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:44:44,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:44:44,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:44:44,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:45:24,730 INFO L130 PetriNetUnfolder]: 417794/548677 cut-off events. [2023-08-30 16:45:24,730 INFO L131 PetriNetUnfolder]: For 983585/983585 co-relation queries the response was YES. [2023-08-30 16:45:27,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767727 conditions, 548677 events. 417794/548677 cut-off events. For 983585/983585 co-relation queries the response was YES. Maximal size of possible extension queue 26916. Compared 4121705 event pairs, 172730 based on Foata normal form. 0/458425 useless extension candidates. Maximal degree in co-relation 983136. Up to 387351 conditions per place. [2023-08-30 16:45:29,547 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 75 selfloop transitions, 45 changer transitions 0/123 dead transitions. [2023-08-30 16:45:29,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 123 transitions, 1072 flow [2023-08-30 16:45:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:45:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:45:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-30 16:45:29,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49214659685863876 [2023-08-30 16:45:29,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-30 16:45:29,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-30 16:45:29,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:45:29,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-30 16:45:29,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:45:29,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:45:29,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:45:29,550 INFO L175 Difference]: Start difference. First operand has 55 places, 70 transitions, 467 flow. Second operand 3 states and 282 transitions. [2023-08-30 16:45:29,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 123 transitions, 1072 flow [2023-08-30 16:45:30,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 123 transitions, 1064 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:45:30,182 INFO L231 Difference]: Finished difference. Result has 58 places, 107 transitions, 1021 flow [2023-08-30 16:45:30,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1021, PETRI_PLACES=58, PETRI_TRANSITIONS=107} [2023-08-30 16:45:30,183 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-08-30 16:45:30,183 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 107 transitions, 1021 flow [2023-08-30 16:45:30,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:45:30,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:45:30,183 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:45:30,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-08-30 16:45:30,183 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:45:30,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:45:30,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1522546149, now seen corresponding path program 1 times [2023-08-30 16:45:30,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:45:30,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652994789] [2023-08-30 16:45:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:45:30,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:45:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:45:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 16:45:30,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:45:30,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652994789] [2023-08-30 16:45:30,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652994789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:45:30,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:45:30,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:45:30,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665926709] [2023-08-30 16:45:30,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:45:30,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:45:30,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:45:30,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:45:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:45:30,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:45:30,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 107 transitions, 1021 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:45:30,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:45:30,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:45:30,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:46:01,427 INFO L130 PetriNetUnfolder]: 335923/429061 cut-off events. [2023-08-30 16:46:01,427 INFO L131 PetriNetUnfolder]: For 1173031/1173031 co-relation queries the response was YES. [2023-08-30 16:46:03,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670367 conditions, 429061 events. 335923/429061 cut-off events. For 1173031/1173031 co-relation queries the response was YES. Maximal size of possible extension queue 21877. Compared 3002326 event pairs, 64967 based on Foata normal form. 18824/389225 useless extension candidates. Maximal degree in co-relation 947173. Up to 340086 conditions per place. [2023-08-30 16:46:05,430 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 147 selfloop transitions, 8 changer transitions 0/158 dead transitions. [2023-08-30 16:46:05,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 158 transitions, 1758 flow [2023-08-30 16:46:05,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:46:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:46:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-30 16:46:05,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4886561954624782 [2023-08-30 16:46:05,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-30 16:46:05,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-30 16:46:05,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:46:05,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-30 16:46:05,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:46:05,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:46:05,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:46:05,434 INFO L175 Difference]: Start difference. First operand has 58 places, 107 transitions, 1021 flow. Second operand 3 states and 280 transitions. [2023-08-30 16:46:05,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 158 transitions, 1758 flow [2023-08-30 16:46:21,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 158 transitions, 1668 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:46:21,996 INFO L231 Difference]: Finished difference. Result has 57 places, 106 transitions, 943 flow [2023-08-30 16:46:21,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=943, PETRI_PLACES=57, PETRI_TRANSITIONS=106} [2023-08-30 16:46:21,996 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2023-08-30 16:46:21,996 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 106 transitions, 943 flow [2023-08-30 16:46:21,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:46:21,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:46:21,996 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:46:21,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-08-30 16:46:21,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:46:21,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:46:21,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1361623679, now seen corresponding path program 1 times [2023-08-30 16:46:21,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:46:21,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137192856] [2023-08-30 16:46:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:46:21,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:46:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:46:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 16:46:22,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:46:22,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137192856] [2023-08-30 16:46:22,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137192856] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:46:22,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:46:22,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:46:22,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655346453] [2023-08-30 16:46:22,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:46:22,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:46:22,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:46:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:46:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:46:22,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:46:22,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 106 transitions, 943 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:46:22,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:46:22,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:46:22,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:47:07,589 INFO L130 PetriNetUnfolder]: 439672/585215 cut-off events. [2023-08-30 16:47:07,589 INFO L131 PetriNetUnfolder]: For 1746645/1746645 co-relation queries the response was YES. [2023-08-30 16:47:11,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143905 conditions, 585215 events. 439672/585215 cut-off events. For 1746645/1746645 co-relation queries the response was YES. Maximal size of possible extension queue 30348. Compared 4591998 event pairs, 165426 based on Foata normal form. 0/513184 useless extension candidates. Maximal degree in co-relation 1260964. Up to 416353 conditions per place. [2023-08-30 16:47:14,746 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 102 selfloop transitions, 81 changer transitions 0/186 dead transitions. [2023-08-30 16:47:14,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 186 transitions, 2047 flow [2023-08-30 16:47:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:47:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:47:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 279 transitions. [2023-08-30 16:47:14,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869109947643979 [2023-08-30 16:47:14,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 279 transitions. [2023-08-30 16:47:14,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 279 transitions. [2023-08-30 16:47:14,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:47:14,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 279 transitions. [2023-08-30 16:47:14,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:47:14,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:47:14,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:47:14,750 INFO L175 Difference]: Start difference. First operand has 57 places, 106 transitions, 943 flow. Second operand 3 states and 279 transitions. [2023-08-30 16:47:14,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 186 transitions, 2047 flow [2023-08-30 16:47:17,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 186 transitions, 2031 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:47:17,632 INFO L231 Difference]: Finished difference. Result has 60 places, 171 transitions, 2065 flow [2023-08-30 16:47:17,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2065, PETRI_PLACES=60, PETRI_TRANSITIONS=171} [2023-08-30 16:47:17,633 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2023-08-30 16:47:17,633 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 171 transitions, 2065 flow [2023-08-30 16:47:17,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:47:17,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:47:17,634 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:47:17,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-08-30 16:47:17,634 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:47:17,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:47:17,634 INFO L85 PathProgramCache]: Analyzing trace with hash 739344680, now seen corresponding path program 1 times [2023-08-30 16:47:17,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:47:17,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132411263] [2023-08-30 16:47:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:47:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:47:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:47:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-30 16:47:17,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:47:17,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132411263] [2023-08-30 16:47:17,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132411263] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:47:17,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:47:17,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:47:17,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470406543] [2023-08-30 16:47:17,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:47:17,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:47:17,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:47:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:47:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:47:17,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:47:17,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 171 transitions, 2065 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:47:17,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:47:17,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:47:17,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:48:01,806 INFO L130 PetriNetUnfolder]: 352515/456751 cut-off events. [2023-08-30 16:48:01,806 INFO L131 PetriNetUnfolder]: For 1894027/1894027 co-relation queries the response was YES. [2023-08-30 16:48:03,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002634 conditions, 456751 events. 352515/456751 cut-off events. For 1894027/1894027 co-relation queries the response was YES. Maximal size of possible extension queue 24658. Compared 3350621 event pairs, 75003 based on Foata normal form. 21018/435972 useless extension candidates. Maximal degree in co-relation 1200912. Up to 358436 conditions per place. [2023-08-30 16:48:06,174 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 230 selfloop transitions, 16 changer transitions 0/249 dead transitions. [2023-08-30 16:48:06,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 249 transitions, 3409 flow [2023-08-30 16:48:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:48:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:48:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-30 16:48:06,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48342059336823734 [2023-08-30 16:48:06,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-30 16:48:06,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-30 16:48:06,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:48:06,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-30 16:48:06,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:48:06,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:48:06,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:48:06,177 INFO L175 Difference]: Start difference. First operand has 60 places, 171 transitions, 2065 flow. Second operand 3 states and 277 transitions. [2023-08-30 16:48:06,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 249 transitions, 3409 flow [2023-08-30 16:48:31,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 249 transitions, 3247 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:48:31,075 INFO L231 Difference]: Finished difference. Result has 59 places, 170 transitions, 1931 flow [2023-08-30 16:48:31,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1931, PETRI_PLACES=59, PETRI_TRANSITIONS=170} [2023-08-30 16:48:31,076 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2023-08-30 16:48:31,076 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 170 transitions, 1931 flow [2023-08-30 16:48:31,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:48:31,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:48:31,076 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:48:31,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-08-30 16:48:31,076 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:48:31,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:48:31,077 INFO L85 PathProgramCache]: Analyzing trace with hash 646525922, now seen corresponding path program 1 times [2023-08-30 16:48:31,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:48:31,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287387317] [2023-08-30 16:48:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:48:31,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:48:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:48:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-30 16:48:31,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:48:31,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287387317] [2023-08-30 16:48:31,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287387317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:48:31,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:48:31,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:48:31,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609082396] [2023-08-30 16:48:31,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:48:31,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:48:31,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:48:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:48:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:48:31,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 191 [2023-08-30 16:48:31,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 170 transitions, 1931 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:48:31,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:48:31,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 191 [2023-08-30 16:48:31,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15