./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_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/31_simple_loop5_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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --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 16:32:55,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:32:55,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:32:55,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:32:55,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:32:55,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:32:55,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:32:55,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:32:55,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:32:55,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:32:55,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:32:55,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:32:55,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:32:55,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:32:55,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:32:55,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:32:55,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:32:55,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:32:55,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:32:55,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:32:55,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:32:55,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:32:55,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:32:55,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:32:55,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:32:55,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:32:55,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:32:55,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:32:55,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:32:55,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:32:55,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:32:55,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:32:55,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:32:55,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:32:55,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:32:55,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:32:55,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:32:55,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:32:55,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:32:55,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:32:55,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:32:55,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:32:55,997 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:32:55,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:32:55,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:32:55,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:32:55,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:32:55,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:32:56,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:32:56,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:32:56,000 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:32:56,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:32:56,001 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:32:56,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:32:56,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:32:56,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:32:56,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:32:56,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:32:56,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:32:56,002 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:32:56,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:32:56,003 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:32:56,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:32:56,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:32:56,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:32:56,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:32:56,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:32:56,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:32:56,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:32:56,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:32:56,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:32:56,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:32:56,004 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:32:56,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:32:56,005 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:32:56,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:32:56,005 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:32:56,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:32:56,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:32:56,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:32:56,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:32:56,276 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:32:56,276 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:32:56,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-30 16:32:57,194 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:32:57,463 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:32:57,468 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-30 16:32:57,479 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6b60912/1708b24f596e4c148c5fcc5aa91837c1/FLAG1426b1b06 [2023-08-30 16:32:57,497 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6b60912/1708b24f596e4c148c5fcc5aa91837c1 [2023-08-30 16:32:57,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:32:57,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:32:57,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:32:57,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:32:57,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:32:57,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3272edd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57, skipping insertion in model container [2023-08-30 16:32:57,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:32:57,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:32:57,775 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/31_simple_loop5_vs.i[30438,30451] [2023-08-30 16:32:57,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:32:57,788 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:32:57,817 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/31_simple_loop5_vs.i[30438,30451] [2023-08-30 16:32:57,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:32:57,847 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:32:57,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57 WrapperNode [2023-08-30 16:32:57,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:32:57,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:32:57,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:32:57,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:32:57,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,893 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2023-08-30 16:32:57,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:32:57,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:32:57,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:32:57,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:32:57,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,909 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:32:57,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:32:57,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:32:57,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:32:57,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (1/1) ... [2023-08-30 16:32:57,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:32:57,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:32:57,943 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 16:32:57,945 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 16:32:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-30 16:32:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-30 16:32:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:32:57,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:32:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:32:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:32:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:32:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:32:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:32:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:32:57,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:32:57,973 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 16:32:58,068 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:32:58,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:32:58,216 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:32:58,246 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:32:58,246 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 16:32:58,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:32:58 BoogieIcfgContainer [2023-08-30 16:32:58,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:32:58,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:32:58,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:32:58,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:32:58,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:32:57" (1/3) ... [2023-08-30 16:32:58,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6621a982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:32:58, skipping insertion in model container [2023-08-30 16:32:58,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:57" (2/3) ... [2023-08-30 16:32:58,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6621a982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:32:58, skipping insertion in model container [2023-08-30 16:32:58,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:32:58" (3/3) ... [2023-08-30 16:32:58,254 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-08-30 16:32:58,260 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:32:58,266 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:32:58,267 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:32:58,267 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:32:58,298 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:32:58,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 61 transitions, 132 flow [2023-08-30 16:32:58,359 INFO L130 PetriNetUnfolder]: 7/70 cut-off events. [2023-08-30 16:32:58,360 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:58,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 7/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-08-30 16:32:58,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 61 transitions, 132 flow [2023-08-30 16:32:58,367 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 60 transitions, 128 flow [2023-08-30 16:32:58,371 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:58,378 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 60 transitions, 128 flow [2023-08-30 16:32:58,380 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 60 transitions, 128 flow [2023-08-30 16:32:58,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 60 transitions, 128 flow [2023-08-30 16:32:58,391 INFO L130 PetriNetUnfolder]: 7/70 cut-off events. [2023-08-30 16:32:58,391 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:58,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 7/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-08-30 16:32:58,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 1040 [2023-08-30 16:32:59,314 INFO L134 LiptonReduction]: Checked pairs total: 1951 [2023-08-30 16:32:59,314 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-08-30 16:32:59,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:32:59,328 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:59,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:32:59,330 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 16:32:59,331 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:59,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:59,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:32:59,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:32:59,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:59,335 INFO L85 PathProgramCache]: Analyzing trace with hash 312627833, now seen corresponding path program 1 times [2023-08-30 16:32:59,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:59,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201094676] [2023-08-30 16:32:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:59,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:32:59,575 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 16:32:59,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:32:59,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201094676] [2023-08-30 16:32:59,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201094676] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:32:59,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:32:59,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:32:59,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115418202] [2023-08-30 16:32:59,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:32:59,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:32:59,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:32:59,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:32:59,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:32:59,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 104 [2023-08-30 16:32:59,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:59,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:32:59,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 104 [2023-08-30 16:32:59,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:32:59,685 INFO L130 PetriNetUnfolder]: 139/236 cut-off events. [2023-08-30 16:32:59,685 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:32:59,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 236 events. 139/236 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 783 event pairs, 39 based on Foata normal form. 21/244 useless extension candidates. Maximal degree in co-relation 470. Up to 170 conditions per place. [2023-08-30 16:32:59,688 INFO L137 encePairwiseOnDemand]: 96/104 looper letters, 17 selfloop transitions, 2 changer transitions 1/24 dead transitions. [2023-08-30 16:32:59,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 96 flow [2023-08-30 16:32:59,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:32:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:32:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-08-30 16:32:59,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2023-08-30 16:32:59,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-08-30 16:32:59,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-08-30 16:32:59,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:32:59,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-08-30 16:32:59,702 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 16:32:59,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:59,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:59,706 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 52 flow. Second operand 3 states and 161 transitions. [2023-08-30 16:32:59,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 96 flow [2023-08-30 16:32:59,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:32:59,709 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 53 flow [2023-08-30 16:32:59,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-08-30 16:32:59,712 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-08-30 16:32:59,712 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 53 flow [2023-08-30 16:32:59,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:59,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:59,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:32:59,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:32:59,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:32:59,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:59,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1551809705, now seen corresponding path program 1 times [2023-08-30 16:32:59,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:59,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653808774] [2023-08-30 16:32:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:59,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:32:59,781 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 16:32:59,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:32:59,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653808774] [2023-08-30 16:32:59,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653808774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:32:59,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:32:59,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:32:59,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554789543] [2023-08-30 16:32:59,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:32:59,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:32:59,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:32:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:32:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:32:59,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 104 [2023-08-30 16:32:59,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:59,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:32:59,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 104 [2023-08-30 16:32:59,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:32:59,811 INFO L130 PetriNetUnfolder]: 47/117 cut-off events. [2023-08-30 16:32:59,811 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:32:59,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 47/117 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 338 event pairs, 11 based on Foata normal form. 27/144 useless extension candidates. Maximal degree in co-relation 233. Up to 59 conditions per place. [2023-08-30 16:32:59,812 INFO L137 encePairwiseOnDemand]: 100/104 looper letters, 12 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2023-08-30 16:32:59,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 96 flow [2023-08-30 16:32:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:32:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:32:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2023-08-30 16:32:59,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 16:32:59,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 156 transitions. [2023-08-30 16:32:59,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 156 transitions. [2023-08-30 16:32:59,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:32:59,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 156 transitions. [2023-08-30 16:32:59,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:59,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:59,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:59,816 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 53 flow. Second operand 3 states and 156 transitions. [2023-08-30 16:32:59,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 96 flow [2023-08-30 16:32:59,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:32:59,817 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 59 flow [2023-08-30 16:32:59,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-08-30 16:32:59,818 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-08-30 16:32:59,818 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 59 flow [2023-08-30 16:32:59,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:59,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:59,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:32:59,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:32:59,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:32:59,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:59,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1268042928, now seen corresponding path program 1 times [2023-08-30 16:32:59,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:59,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626997875] [2023-08-30 16:32:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:59,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:32:59,898 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 16:32:59,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:32:59,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626997875] [2023-08-30 16:32:59,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626997875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:32:59,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:32:59,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:32:59,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281958338] [2023-08-30 16:32:59,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:32:59,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:32:59,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:32:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:32:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:32:59,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 104 [2023-08-30 16:32:59,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 59 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:59,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:32:59,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 104 [2023-08-30 16:32:59,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:32:59,989 INFO L130 PetriNetUnfolder]: 75/170 cut-off events. [2023-08-30 16:32:59,989 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-08-30 16:32:59,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 170 events. 75/170 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 505 event pairs, 13 based on Foata normal form. 3/172 useless extension candidates. Maximal degree in co-relation 418. Up to 63 conditions per place. [2023-08-30 16:32:59,994 INFO L137 encePairwiseOnDemand]: 100/104 looper letters, 25 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-08-30 16:32:59,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 163 flow [2023-08-30 16:32:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:32:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:32:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2023-08-30 16:32:59,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2023-08-30 16:32:59,998 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 230 transitions. [2023-08-30 16:32:59,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 230 transitions. [2023-08-30 16:32:59,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:32:59,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 230 transitions. [2023-08-30 16:33:00,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:00,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:00,003 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:00,003 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 59 flow. Second operand 5 states and 230 transitions. [2023-08-30 16:33:00,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 163 flow [2023-08-30 16:33:00,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 33 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:33:00,005 INFO L231 Difference]: Finished difference. Result has 29 places, 20 transitions, 79 flow [2023-08-30 16:33:00,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=79, PETRI_PLACES=29, PETRI_TRANSITIONS=20} [2023-08-30 16:33:00,006 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-30 16:33:00,008 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 20 transitions, 79 flow [2023-08-30 16:33:00,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:00,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:00,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:00,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:33:00,010 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:00,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1258099607, now seen corresponding path program 2 times [2023-08-30 16:33:00,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:00,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876078673] [2023-08-30 16:33:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:00,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:00,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:00,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876078673] [2023-08-30 16:33:00,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876078673] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:33:00,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323916352] [2023-08-30 16:33:00,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:33:00,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:00,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:33:00,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:33:00,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 16:33:00,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:33:00,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:33:00,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 16:33:00,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:33:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:00,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:33:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:00,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323916352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:33:00,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:33:00,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-30 16:33:00,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517033710] [2023-08-30 16:33:00,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:33:00,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 16:33:00,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:00,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 16:33:00,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-30 16:33:00,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 104 [2023-08-30 16:33:00,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 20 transitions, 79 flow. Second operand has 17 states, 17 states have (on average 40.64705882352941) internal successors, (691), 17 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:00,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:00,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 104 [2023-08-30 16:33:00,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:00,704 INFO L130 PetriNetUnfolder]: 99/223 cut-off events. [2023-08-30 16:33:00,704 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 16:33:00,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 223 events. 99/223 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 659 event pairs, 9 based on Foata normal form. 3/225 useless extension candidates. Maximal degree in co-relation 552. Up to 63 conditions per place. [2023-08-30 16:33:00,706 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 34 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2023-08-30 16:33:00,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 228 flow [2023-08-30 16:33:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:33:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:33:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 346 transitions. [2023-08-30 16:33:00,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41586538461538464 [2023-08-30 16:33:00,707 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 346 transitions. [2023-08-30 16:33:00,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 346 transitions. [2023-08-30 16:33:00,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:00,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 346 transitions. [2023-08-30 16:33:00,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 43.25) internal successors, (346), 8 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:00,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:00,710 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:00,710 INFO L175 Difference]: Start difference. First operand has 29 places, 20 transitions, 79 flow. Second operand 8 states and 346 transitions. [2023-08-30 16:33:00,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 228 flow [2023-08-30 16:33:00,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 222 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 16:33:00,712 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 114 flow [2023-08-30 16:33:00,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=114, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-08-30 16:33:00,712 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 12 predicate places. [2023-08-30 16:33:00,712 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 114 flow [2023-08-30 16:33:00,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 40.64705882352941) internal successors, (691), 17 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:00,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:00,715 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:00,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 16:33:00,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:00,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:00,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash -641159280, now seen corresponding path program 3 times [2023-08-30 16:33:00,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:00,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503919429] [2023-08-30 16:33:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:00,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:01,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:01,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503919429] [2023-08-30 16:33:01,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503919429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:33:01,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535947169] [2023-08-30 16:33:01,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:33:01,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:01,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:33:01,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:33:01,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 16:33:01,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 16:33:01,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:33:01,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 16:33:01,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:33:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:01,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:33:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:01,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535947169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:33:01,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:33:01,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-30 16:33:01,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440142791] [2023-08-30 16:33:01,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:33:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 16:33:01,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 16:33:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-08-30 16:33:01,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 104 [2023-08-30 16:33:01,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 114 flow. Second operand has 24 states, 24 states have (on average 39.375) internal successors, (945), 24 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:01,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:01,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 104 [2023-08-30 16:33:01,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:01,841 INFO L130 PetriNetUnfolder]: 160/348 cut-off events. [2023-08-30 16:33:01,841 INFO L131 PetriNetUnfolder]: For 176/177 co-relation queries the response was YES. [2023-08-30 16:33:01,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988 conditions, 348 events. 160/348 cut-off events. For 176/177 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1042 event pairs, 14 based on Foata normal form. 9/357 useless extension candidates. Maximal degree in co-relation 969. Up to 72 conditions per place. [2023-08-30 16:33:01,843 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 0 selfloop transitions, 0 changer transitions 57/57 dead transitions. [2023-08-30 16:33:01,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 318 flow [2023-08-30 16:33:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 16:33:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 16:33:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 496 transitions. [2023-08-30 16:33:01,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2023-08-30 16:33:01,845 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 496 transitions. [2023-08-30 16:33:01,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 496 transitions. [2023-08-30 16:33:01,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:01,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 496 transitions. [2023-08-30 16:33:01,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 41.333333333333336) internal successors, (496), 12 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:01,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:01,848 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:01,848 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 114 flow. Second operand 12 states and 496 transitions. [2023-08-30 16:33:01,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 318 flow [2023-08-30 16:33:01,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 304 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 16:33:01,854 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-30 16:33:01,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-30 16:33:01,856 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 18 predicate places. [2023-08-30 16:33:01,858 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-30 16:33:01,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 39.375) internal successors, (945), 24 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:01,860 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:33:01,860 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:33:01,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 16:33:02,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:02,069 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-30 16:33:02,072 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 16:33:02,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 61 transitions, 132 flow [2023-08-30 16:33:02,084 INFO L130 PetriNetUnfolder]: 7/70 cut-off events. [2023-08-30 16:33:02,084 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:33:02,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 7/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-08-30 16:33:02,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 61 transitions, 132 flow [2023-08-30 16:33:02,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 60 transitions, 128 flow [2023-08-30 16:33:02,086 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:02,086 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 60 transitions, 128 flow [2023-08-30 16:33:02,086 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 60 transitions, 128 flow [2023-08-30 16:33:02,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 60 transitions, 128 flow [2023-08-30 16:33:02,090 INFO L130 PetriNetUnfolder]: 7/70 cut-off events. [2023-08-30 16:33:02,090 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:33:02,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 7/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-08-30 16:33:02,091 INFO L119 LiptonReduction]: Number of co-enabled transitions 1040 [2023-08-30 16:33:02,852 INFO L134 LiptonReduction]: Checked pairs total: 1951 [2023-08-30 16:33:02,852 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-08-30 16:33:02,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:33:02,856 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:02,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:33:02,858 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2023-08-30 16:33:02,859 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:33:02,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:02,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:02,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:33:02,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:02,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1983597924, now seen corresponding path program 1 times [2023-08-30 16:33:02,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:02,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434193806] [2023-08-30 16:33:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:02,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:02,879 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:33:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:02,905 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:33:02,905 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:33:02,905 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 16:33:02,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 16:33:02,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:33:02,906 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:33:02,906 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 16:33:02,907 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:33:02,907 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 16:33:02,922 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:33:02,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 88 transitions, 200 flow [2023-08-30 16:33:02,930 INFO L130 PetriNetUnfolder]: 10/95 cut-off events. [2023-08-30 16:33:02,930 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:33:02,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 104. Up to 6 conditions per place. [2023-08-30 16:33:02,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 88 transitions, 200 flow [2023-08-30 16:33:02,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 73 transitions, 161 flow [2023-08-30 16:33:02,931 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:02,932 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 73 transitions, 161 flow [2023-08-30 16:33:02,932 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 73 transitions, 161 flow [2023-08-30 16:33:02,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 161 flow [2023-08-30 16:33:02,941 INFO L130 PetriNetUnfolder]: 10/95 cut-off events. [2023-08-30 16:33:02,941 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:33:02,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-30 16:33:02,942 INFO L119 LiptonReduction]: Number of co-enabled transitions 2002 [2023-08-30 16:33:03,830 INFO L134 LiptonReduction]: Checked pairs total: 5293 [2023-08-30 16:33:03,830 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-08-30 16:33:03,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:33:03,831 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:03,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:33:03,832 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 16:33:03,832 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:33:03,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:03,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:33:03,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:03,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash 507169220, now seen corresponding path program 1 times [2023-08-30 16:33:03,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:03,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955395348] [2023-08-30 16:33:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:03,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:03,880 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 16:33:03,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:03,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955395348] [2023-08-30 16:33:03,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955395348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:03,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:03,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:33:03,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391926177] [2023-08-30 16:33:03,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:03,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:33:03,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:03,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:33:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:33:03,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 134 [2023-08-30 16:33:03,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:03,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:03,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 134 [2023-08-30 16:33:03,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:03,982 INFO L130 PetriNetUnfolder]: 637/1045 cut-off events. [2023-08-30 16:33:03,983 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-08-30 16:33:03,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2042 conditions, 1045 events. 637/1045 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5197 event pairs, 142 based on Foata normal form. 15/1058 useless extension candidates. Maximal degree in co-relation 2031. Up to 799 conditions per place. [2023-08-30 16:33:03,988 INFO L137 encePairwiseOnDemand]: 125/134 looper letters, 22 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-30 16:33:03,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 142 flow [2023-08-30 16:33:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:33:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:33:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-08-30 16:33:03,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074626865671642 [2023-08-30 16:33:03,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-08-30 16:33:03,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-08-30 16:33:03,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:03,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-08-30 16:33:03,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:03,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:03,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:03,991 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 81 flow. Second operand 3 states and 204 transitions. [2023-08-30 16:33:03,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 142 flow [2023-08-30 16:33:03,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 16:33:03,992 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 87 flow [2023-08-30 16:33:03,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 16:33:03,993 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2023-08-30 16:33:03,993 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 87 flow [2023-08-30 16:33:03,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:03,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:03,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:03,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:33:03,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:03,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:03,994 INFO L85 PathProgramCache]: Analyzing trace with hash 894208624, now seen corresponding path program 1 times [2023-08-30 16:33:03,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:03,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652996155] [2023-08-30 16:33:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:03,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:04,035 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 16:33:04,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:04,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652996155] [2023-08-30 16:33:04,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652996155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:04,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:04,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:33:04,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564456833] [2023-08-30 16:33:04,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:04,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:33:04,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:33:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:33:04,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 134 [2023-08-30 16:33:04,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 87 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 16:33:04,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:04,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 134 [2023-08-30 16:33:04,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:04,074 INFO L130 PetriNetUnfolder]: 90/300 cut-off events. [2023-08-30 16:33:04,074 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:33:04,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 300 events. 90/300 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1431 event pairs, 20 based on Foata normal form. 86/385 useless extension candidates. Maximal degree in co-relation 549. Up to 104 conditions per place. [2023-08-30 16:33:04,076 INFO L137 encePairwiseOnDemand]: 128/134 looper letters, 11 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-30 16:33:04,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 137 flow [2023-08-30 16:33:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:33:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:33:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-08-30 16:33:04,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049751243781094 [2023-08-30 16:33:04,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-08-30 16:33:04,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-08-30 16:33:04,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:04,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-08-30 16:33:04,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:04,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:04,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:04,081 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 87 flow. Second operand 3 states and 203 transitions. [2023-08-30 16:33:04,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 137 flow [2023-08-30 16:33:04,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:33:04,083 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 96 flow [2023-08-30 16:33:04,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-30 16:33:04,084 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-08-30 16:33:04,084 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 96 flow [2023-08-30 16:33:04,084 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 16:33:04,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:04,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:04,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:33:04,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:04,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:04,085 INFO L85 PathProgramCache]: Analyzing trace with hash 941306404, now seen corresponding path program 1 times [2023-08-30 16:33:04,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:04,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908109317] [2023-08-30 16:33:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:04,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:04,151 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 16:33:04,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:04,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908109317] [2023-08-30 16:33:04,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908109317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:04,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:04,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:33:04,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54855548] [2023-08-30 16:33:04,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:04,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:33:04,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:33:04,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:33:04,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 134 [2023-08-30 16:33:04,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:04,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:04,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 134 [2023-08-30 16:33:04,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:04,251 INFO L130 PetriNetUnfolder]: 202/511 cut-off events. [2023-08-30 16:33:04,252 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2023-08-30 16:33:04,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 511 events. 202/511 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2930 event pairs, 19 based on Foata normal form. 6/515 useless extension candidates. Maximal degree in co-relation 1237. Up to 229 conditions per place. [2023-08-30 16:33:04,254 INFO L137 encePairwiseOnDemand]: 126/134 looper letters, 36 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2023-08-30 16:33:04,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 278 flow [2023-08-30 16:33:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:33:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:33:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 352 transitions. [2023-08-30 16:33:04,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43781094527363185 [2023-08-30 16:33:04,256 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 352 transitions. [2023-08-30 16:33:04,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 352 transitions. [2023-08-30 16:33:04,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:04,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 352 transitions. [2023-08-30 16:33:04,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 58.666666666666664) internal successors, (352), 6 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:04,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:04,259 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:04,259 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 96 flow. Second operand 6 states and 352 transitions. [2023-08-30 16:33:04,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 278 flow [2023-08-30 16:33:04,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:33:04,261 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 150 flow [2023-08-30 16:33:04,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-30 16:33:04,262 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-08-30 16:33:04,262 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 150 flow [2023-08-30 16:33:04,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:04,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:04,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:04,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:33:04,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:04,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2126391, now seen corresponding path program 2 times [2023-08-30 16:33:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:04,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920309653] [2023-08-30 16:33:04,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:04,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:04,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:04,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920309653] [2023-08-30 16:33:04,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920309653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:33:04,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276658037] [2023-08-30 16:33:04,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:33:04,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:04,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:33:04,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:33:04,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 16:33:04,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:33:04,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:33:04,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 16:33:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:33:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:04,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:33:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:04,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276658037] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:33:04,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:33:04,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 16:33:04,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014932080] [2023-08-30 16:33:04,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:33:04,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:33:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:33:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-30 16:33:04,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 134 [2023-08-30 16:33:04,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 150 flow. Second operand has 20 states, 20 states have (on average 50.85) internal successors, (1017), 20 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:04,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:04,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 134 [2023-08-30 16:33:04,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:05,050 INFO L130 PetriNetUnfolder]: 337/782 cut-off events. [2023-08-30 16:33:05,050 INFO L131 PetriNetUnfolder]: For 269/269 co-relation queries the response was YES. [2023-08-30 16:33:05,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2069 conditions, 782 events. 337/782 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4788 event pairs, 19 based on Foata normal form. 8/788 useless extension candidates. Maximal degree in co-relation 2051. Up to 261 conditions per place. [2023-08-30 16:33:05,054 INFO L137 encePairwiseOnDemand]: 124/134 looper letters, 56 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2023-08-30 16:33:05,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 82 transitions, 469 flow [2023-08-30 16:33:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 16:33:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 16:33:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 604 transitions. [2023-08-30 16:33:05,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097693351424695 [2023-08-30 16:33:05,056 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 604 transitions. [2023-08-30 16:33:05,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 604 transitions. [2023-08-30 16:33:05,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:05,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 604 transitions. [2023-08-30 16:33:05,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 54.90909090909091) internal successors, (604), 11 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 16:33:05,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:05,059 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:05,059 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 150 flow. Second operand 11 states and 604 transitions. [2023-08-30 16:33:05,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 82 transitions, 469 flow [2023-08-30 16:33:05,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 82 transitions, 459 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 16:33:05,062 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 255 flow [2023-08-30 16:33:05,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=255, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-08-30 16:33:05,063 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 19 predicate places. [2023-08-30 16:33:05,063 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 255 flow [2023-08-30 16:33:05,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 50.85) internal successors, (1017), 20 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:05,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:05,064 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:05,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 16:33:05,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:05,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:05,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash -714767818, now seen corresponding path program 3 times [2023-08-30 16:33:05,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:05,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449261135] [2023-08-30 16:33:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:05,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:05,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449261135] [2023-08-30 16:33:05,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449261135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:33:05,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877380287] [2023-08-30 16:33:05,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:33:05,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:05,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:33:05,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:33:05,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 16:33:05,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 16:33:05,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:33:05,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 16:33:05,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:33:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:05,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:33:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:05,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877380287] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:33:05,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:33:05,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 16:33:05,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888484091] [2023-08-30 16:33:05,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:33:05,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 16:33:05,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:05,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 16:33:05,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2023-08-30 16:33:05,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 134 [2023-08-30 16:33:05,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 255 flow. Second operand has 27 states, 27 states have (on average 48.77777777777778) internal successors, (1317), 27 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:05,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:05,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 134 [2023-08-30 16:33:05,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:06,506 INFO L130 PetriNetUnfolder]: 568/1282 cut-off events. [2023-08-30 16:33:06,507 INFO L131 PetriNetUnfolder]: For 850/851 co-relation queries the response was YES. [2023-08-30 16:33:06,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 1282 events. 568/1282 cut-off events. For 850/851 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 8103 event pairs, 25 based on Foata normal form. 24/1305 useless extension candidates. Maximal degree in co-relation 3903. Up to 338 conditions per place. [2023-08-30 16:33:06,509 INFO L137 encePairwiseOnDemand]: 124/134 looper letters, 0 selfloop transitions, 0 changer transitions 104/104 dead transitions. [2023-08-30 16:33:06,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 104 transitions, 709 flow [2023-08-30 16:33:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 16:33:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 16:33:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 775 transitions. [2023-08-30 16:33:06,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855721393034826 [2023-08-30 16:33:06,512 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 775 transitions. [2023-08-30 16:33:06,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 775 transitions. [2023-08-30 16:33:06,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:06,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 775 transitions. [2023-08-30 16:33:06,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 51.666666666666664) internal successors, (775), 15 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:06,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 134.0) internal successors, (2144), 16 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:06,516 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 134.0) internal successors, (2144), 16 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:06,516 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 255 flow. Second operand 15 states and 775 transitions. [2023-08-30 16:33:06,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 104 transitions, 709 flow [2023-08-30 16:33:06,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 104 transitions, 675 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-30 16:33:06,521 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-30 16:33:06,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-30 16:33:06,522 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 27 predicate places. [2023-08-30 16:33:06,522 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-30 16:33:06,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 48.77777777777778) internal successors, (1317), 27 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:06,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 16:33:06,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 16:33:06,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 16:33:06,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 16:33:06,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:06,727 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-30 16:33:06,728 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 16:33:06,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 88 transitions, 200 flow [2023-08-30 16:33:06,733 INFO L130 PetriNetUnfolder]: 10/95 cut-off events. [2023-08-30 16:33:06,734 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:33:06,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 104. Up to 6 conditions per place. [2023-08-30 16:33:06,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 88 transitions, 200 flow [2023-08-30 16:33:06,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 73 transitions, 161 flow [2023-08-30 16:33:06,734 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:06,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 73 transitions, 161 flow [2023-08-30 16:33:06,735 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 73 transitions, 161 flow [2023-08-30 16:33:06,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 161 flow [2023-08-30 16:33:06,739 INFO L130 PetriNetUnfolder]: 10/95 cut-off events. [2023-08-30 16:33:06,739 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:33:06,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-30 16:33:06,740 INFO L119 LiptonReduction]: Number of co-enabled transitions 2002 [2023-08-30 16:33:07,367 INFO L134 LiptonReduction]: Checked pairs total: 5342 [2023-08-30 16:33:07,367 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-08-30 16:33:07,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:33:07,368 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:07,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:33:07,370 INFO L130 PetriNetUnfolder]: 3/35 cut-off events. [2023-08-30 16:33:07,370 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:33:07,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:07,370 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:07,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:33:07,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:07,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1129631747, now seen corresponding path program 1 times [2023-08-30 16:33:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:07,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421110222] [2023-08-30 16:33:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:07,388 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:33:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:07,411 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:33:07,412 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:33:07,412 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 16:33:07,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 16:33:07,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:33:07,412 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:33:07,413 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 16:33:07,413 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:33:07,413 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 16:33:07,444 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:33:07,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 272 flow [2023-08-30 16:33:07,451 INFO L130 PetriNetUnfolder]: 13/120 cut-off events. [2023-08-30 16:33:07,451 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:33:07,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 219 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-30 16:33:07,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 115 transitions, 272 flow [2023-08-30 16:33:07,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 86 transitions, 196 flow [2023-08-30 16:33:07,452 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:07,452 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 86 transitions, 196 flow [2023-08-30 16:33:07,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 86 transitions, 196 flow [2023-08-30 16:33:07,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 86 transitions, 196 flow [2023-08-30 16:33:07,457 INFO L130 PetriNetUnfolder]: 13/120 cut-off events. [2023-08-30 16:33:07,457 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:33:07,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 221 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 113. Up to 8 conditions per place. [2023-08-30 16:33:07,459 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2023-08-30 16:33:08,310 INFO L134 LiptonReduction]: Checked pairs total: 11605 [2023-08-30 16:33:08,310 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-30 16:33:08,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:33:08,312 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:08,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 16:33:08,313 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 16:33:08,313 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:33:08,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:08,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:33:08,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:08,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:08,313 INFO L85 PathProgramCache]: Analyzing trace with hash 735062780, now seen corresponding path program 1 times [2023-08-30 16:33:08,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:08,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045557982] [2023-08-30 16:33:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:08,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:08,332 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 16:33:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045557982] [2023-08-30 16:33:08,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045557982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:08,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:08,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:33:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970702487] [2023-08-30 16:33:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:33:08,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:33:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:33:08,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 166 [2023-08-30 16:33:08,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 110 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 16:33:08,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:08,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 166 [2023-08-30 16:33:08,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:08,980 INFO L130 PetriNetUnfolder]: 8028/11565 cut-off events. [2023-08-30 16:33:08,980 INFO L131 PetriNetUnfolder]: For 1489/1489 co-relation queries the response was YES. [2023-08-30 16:33:08,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23152 conditions, 11565 events. 8028/11565 cut-off events. For 1489/1489 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 69099 event pairs, 2122 based on Foata normal form. 0/11254 useless extension candidates. Maximal degree in co-relation 23140. Up to 7357 conditions per place. [2023-08-30 16:33:09,034 INFO L137 encePairwiseOnDemand]: 151/166 looper letters, 33 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2023-08-30 16:33:09,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 226 flow [2023-08-30 16:33:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:33:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:33:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-08-30 16:33:09,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879518072289157 [2023-08-30 16:33:09,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-08-30 16:33:09,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-08-30 16:33:09,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:09,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-08-30 16:33:09,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 16:33:09,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,037 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 110 flow. Second operand 3 states and 243 transitions. [2023-08-30 16:33:09,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 226 flow [2023-08-30 16:33:09,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 217 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 16:33:09,039 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 151 flow [2023-08-30 16:33:09,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-30 16:33:09,040 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-30 16:33:09,040 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 151 flow [2023-08-30 16:33:09,041 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 16:33:09,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:09,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:09,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:33:09,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:09,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1628822708, now seen corresponding path program 1 times [2023-08-30 16:33:09,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955002284] [2023-08-30 16:33:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:09,082 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 16:33:09,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:09,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955002284] [2023-08-30 16:33:09,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955002284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:09,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:09,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:33:09,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355447158] [2023-08-30 16:33:09,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:09,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:33:09,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:09,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:33:09,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:33:09,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 166 [2023-08-30 16:33:09,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:09,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 166 [2023-08-30 16:33:09,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:09,161 INFO L130 PetriNetUnfolder]: 303/927 cut-off events. [2023-08-30 16:33:09,161 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-08-30 16:33:09,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 927 events. 303/927 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5866 event pairs, 39 based on Foata normal form. 413/1330 useless extension candidates. Maximal degree in co-relation 1853. Up to 343 conditions per place. [2023-08-30 16:33:09,164 INFO L137 encePairwiseOnDemand]: 158/166 looper letters, 13 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2023-08-30 16:33:09,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 198 flow [2023-08-30 16:33:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:33:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:33:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-08-30 16:33:09,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080321285140562 [2023-08-30 16:33:09,165 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-08-30 16:33:09,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-08-30 16:33:09,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:09,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-08-30 16:33:09,166 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 16:33:09,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,168 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 151 flow. Second operand 3 states and 253 transitions. [2023-08-30 16:33:09,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 198 flow [2023-08-30 16:33:09,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 182 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 16:33:09,172 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 133 flow [2023-08-30 16:33:09,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-08-30 16:33:09,172 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-30 16:33:09,173 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 133 flow [2023-08-30 16:33:09,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:09,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:09,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:33:09,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:09,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:09,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1686302105, now seen corresponding path program 1 times [2023-08-30 16:33:09,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:09,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749134206] [2023-08-30 16:33:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:09,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:09,214 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 16:33:09,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:09,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749134206] [2023-08-30 16:33:09,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749134206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:09,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:09,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:33:09,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501893027] [2023-08-30 16:33:09,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:09,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:33:09,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:09,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:33:09,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:33:09,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 166 [2023-08-30 16:33:09,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 61.4) internal successors, (307), 5 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:09,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 166 [2023-08-30 16:33:09,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:09,422 INFO L130 PetriNetUnfolder]: 794/1797 cut-off events. [2023-08-30 16:33:09,423 INFO L131 PetriNetUnfolder]: For 657/657 co-relation queries the response was YES. [2023-08-30 16:33:09,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4618 conditions, 1797 events. 794/1797 cut-off events. For 657/657 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12872 event pairs, 41 based on Foata normal form. 0/1771 useless extension candidates. Maximal degree in co-relation 4604. Up to 1016 conditions per place. [2023-08-30 16:33:09,432 INFO L137 encePairwiseOnDemand]: 155/166 looper letters, 57 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2023-08-30 16:33:09,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 83 transitions, 455 flow [2023-08-30 16:33:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:33:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:33:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 420 transitions. [2023-08-30 16:33:09,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42168674698795183 [2023-08-30 16:33:09,434 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 420 transitions. [2023-08-30 16:33:09,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 420 transitions. [2023-08-30 16:33:09,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:09,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 420 transitions. [2023-08-30 16:33:09,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,436 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,436 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 133 flow. Second operand 6 states and 420 transitions. [2023-08-30 16:33:09,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 83 transitions, 455 flow [2023-08-30 16:33:09,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 83 transitions, 434 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:33:09,439 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 252 flow [2023-08-30 16:33:09,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2023-08-30 16:33:09,440 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-08-30 16:33:09,440 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 252 flow [2023-08-30 16:33:09,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.4) internal successors, (307), 5 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:09,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:09,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:09,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:33:09,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:09,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1928030048, now seen corresponding path program 2 times [2023-08-30 16:33:09,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:09,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429340759] [2023-08-30 16:33:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:09,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:09,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:09,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429340759] [2023-08-30 16:33:09,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429340759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:33:09,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301218678] [2023-08-30 16:33:09,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:33:09,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:09,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:33:09,562 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:33:09,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 16:33:09,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:33:09,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:33:09,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 16:33:09,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:33:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:09,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:33:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:09,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301218678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:33:09,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:33:09,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 16:33:09,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344174973] [2023-08-30 16:33:09,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:33:09,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:33:09,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:33:09,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-30 16:33:10,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 166 [2023-08-30 16:33:10,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 252 flow. Second operand has 20 states, 20 states have (on average 60.85) internal successors, (1217), 20 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:10,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:10,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 166 [2023-08-30 16:33:10,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:10,480 INFO L130 PetriNetUnfolder]: 1369/2861 cut-off events. [2023-08-30 16:33:10,481 INFO L131 PetriNetUnfolder]: For 1159/1159 co-relation queries the response was YES. [2023-08-30 16:33:10,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7742 conditions, 2861 events. 1369/2861 cut-off events. For 1159/1159 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 21719 event pairs, 33 based on Foata normal form. 20/2877 useless extension candidates. Maximal degree in co-relation 7723. Up to 1143 conditions per place. [2023-08-30 16:33:10,490 INFO L137 encePairwiseOnDemand]: 152/166 looper letters, 81 selfloop transitions, 34 changer transitions 0/124 dead transitions. [2023-08-30 16:33:10,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 124 transitions, 767 flow [2023-08-30 16:33:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 16:33:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 16:33:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 745 transitions. [2023-08-30 16:33:10,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079956188389923 [2023-08-30 16:33:10,492 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 745 transitions. [2023-08-30 16:33:10,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 745 transitions. [2023-08-30 16:33:10,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:10,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 745 transitions. [2023-08-30 16:33:10,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:10,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:10,496 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:10,496 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 252 flow. Second operand 11 states and 745 transitions. [2023-08-30 16:33:10,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 124 transitions, 767 flow [2023-08-30 16:33:10,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 124 transitions, 767 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:33:10,500 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 464 flow [2023-08-30 16:33:10,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=464, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2023-08-30 16:33:10,500 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-08-30 16:33:10,501 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 464 flow [2023-08-30 16:33:10,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.85) internal successors, (1217), 20 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:10,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:10,501 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:10,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 16:33:10,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 16:33:10,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:33:10,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2077105879, now seen corresponding path program 3 times [2023-08-30 16:33:10,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:10,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269769115] [2023-08-30 16:33:10,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:10,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:10,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:10,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269769115] [2023-08-30 16:33:10,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269769115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:33:10,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659175953] [2023-08-30 16:33:10,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:33:10,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:10,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:33:10,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:33:10,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 16:33:10,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 16:33:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:33:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 16:33:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:33:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:10,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:33:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:11,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659175953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:33:11,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:33:11,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-30 16:33:11,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402646936] [2023-08-30 16:33:11,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:33:11,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 16:33:11,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 16:33:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-30 16:33:11,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 166 [2023-08-30 16:33:11,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 464 flow. Second operand has 24 states, 24 states have (on average 58.125) internal successors, (1395), 24 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:11,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:11,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 166 [2023-08-30 16:33:11,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:11,992 INFO L130 PetriNetUnfolder]: 2444/5009 cut-off events. [2023-08-30 16:33:11,992 INFO L131 PetriNetUnfolder]: For 4005/4005 co-relation queries the response was YES. [2023-08-30 16:33:12,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15923 conditions, 5009 events. 2444/5009 cut-off events. For 4005/4005 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 39761 event pairs, 41 based on Foata normal form. 66/5071 useless extension candidates. Maximal degree in co-relation 15897. Up to 1252 conditions per place. [2023-08-30 16:33:12,003 INFO L137 encePairwiseOnDemand]: 152/166 looper letters, 0 selfloop transitions, 0 changer transitions 164/164 dead transitions. [2023-08-30 16:33:12,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 164 transitions, 1249 flow [2023-08-30 16:33:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 16:33:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 16:33:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 943 transitions. [2023-08-30 16:33:12,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378714859437751 [2023-08-30 16:33:12,005 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 943 transitions. [2023-08-30 16:33:12,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 943 transitions. [2023-08-30 16:33:12,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:12,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 943 transitions. [2023-08-30 16:33:12,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 62.86666666666667) internal successors, (943), 15 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:12,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 166.0) internal successors, (2656), 16 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:12,010 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 166.0) internal successors, (2656), 16 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:12,010 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 464 flow. Second operand 15 states and 943 transitions. [2023-08-30 16:33:12,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 164 transitions, 1249 flow [2023-08-30 16:33:12,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 164 transitions, 1193 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-30 16:33:12,020 INFO L231 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2023-08-30 16:33:12,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2023-08-30 16:33:12,021 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 27 predicate places. [2023-08-30 16:33:12,021 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2023-08-30 16:33:12,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 58.125) internal successors, (1395), 24 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:12,021 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 16:33:12,022 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 16:33:12,022 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 16:33:12,022 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 16:33:12,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 16:33:12,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 16:33:12,227 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-30 16:33:12,227 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:33:12,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 272 flow [2023-08-30 16:33:12,234 INFO L130 PetriNetUnfolder]: 13/120 cut-off events. [2023-08-30 16:33:12,234 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:33:12,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 219 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-30 16:33:12,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 115 transitions, 272 flow [2023-08-30 16:33:12,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 86 transitions, 196 flow [2023-08-30 16:33:12,235 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:12,235 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 86 transitions, 196 flow [2023-08-30 16:33:12,235 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 86 transitions, 196 flow [2023-08-30 16:33:12,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 86 transitions, 196 flow [2023-08-30 16:33:12,241 INFO L130 PetriNetUnfolder]: 13/120 cut-off events. [2023-08-30 16:33:12,241 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:33:12,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 221 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 113. Up to 8 conditions per place. [2023-08-30 16:33:12,243 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2023-08-30 16:33:13,010 INFO L134 LiptonReduction]: Checked pairs total: 10077 [2023-08-30 16:33:13,010 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-30 16:33:13,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:33:13,011 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:13,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:33:13,014 INFO L130 PetriNetUnfolder]: 4/48 cut-off events. [2023-08-30 16:33:13,014 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:33:13,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:13,014 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:13,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:33:13,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:13,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1329452326, now seen corresponding path program 1 times [2023-08-30 16:33:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:13,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783943660] [2023-08-30 16:33:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:13,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:13,021 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:33:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:13,026 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:33:13,026 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:33:13,026 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 16:33:13,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 16:33:13,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 16:33:13,027 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:33:13,027 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 16:33:13,027 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:33:13,027 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 16:33:13,043 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:33:13,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 142 transitions, 348 flow [2023-08-30 16:33:13,086 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-08-30 16:33:13,086 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:33:13,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 145 events. 16/145 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 284 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 165. Up to 10 conditions per place. [2023-08-30 16:33:13,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 142 transitions, 348 flow [2023-08-30 16:33:13,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 233 flow [2023-08-30 16:33:13,087 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:13,087 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 233 flow [2023-08-30 16:33:13,087 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 233 flow [2023-08-30 16:33:13,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 233 flow [2023-08-30 16:33:13,093 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-08-30 16:33:13,093 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:33:13,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 145 events. 16/145 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 273 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 144. Up to 10 conditions per place. [2023-08-30 16:33:13,095 INFO L119 LiptonReduction]: Number of co-enabled transitions 4862 [2023-08-30 16:33:13,830 INFO L134 LiptonReduction]: Checked pairs total: 15818 [2023-08-30 16:33:13,831 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-30 16:33:13,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:33:13,832 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:13,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 16:33:13,833 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 16:33:13,833 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:33:13,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:13,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:33:13,833 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 16:33:13,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash 998277817, now seen corresponding path program 1 times [2023-08-30 16:33:13,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:13,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561643922] [2023-08-30 16:33:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:13,867 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 16:33:13,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:13,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561643922] [2023-08-30 16:33:13,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561643922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:13,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:13,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:33:13,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191888442] [2023-08-30 16:33:13,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:13,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:33:13,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:33:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:33:13,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 198 [2023-08-30 16:33:13,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:13,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:13,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 198 [2023-08-30 16:33:13,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:17,497 INFO L130 PetriNetUnfolder]: 52253/69823 cut-off events. [2023-08-30 16:33:17,498 INFO L131 PetriNetUnfolder]: For 13262/13262 co-relation queries the response was YES. [2023-08-30 16:33:17,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141592 conditions, 69823 events. 52253/69823 cut-off events. For 13262/13262 co-relation queries the response was YES. Maximal size of possible extension queue 2252. Compared 436079 event pairs, 15211 based on Foata normal form. 0/68268 useless extension candidates. Maximal degree in co-relation 141579. Up to 46663 conditions per place. [2023-08-30 16:33:18,028 INFO L137 encePairwiseOnDemand]: 180/198 looper letters, 41 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2023-08-30 16:33:18,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 292 flow [2023-08-30 16:33:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:33:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:33:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-08-30 16:33:18,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2023-08-30 16:33:18,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-08-30 16:33:18,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-08-30 16:33:18,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:18,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-08-30 16:33:18,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 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 16:33:18,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,033 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 137 flow. Second operand 3 states and 288 transitions. [2023-08-30 16:33:18,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 292 flow [2023-08-30 16:33:18,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 273 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 16:33:18,045 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 188 flow [2023-08-30 16:33:18,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2023-08-30 16:33:18,045 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-30 16:33:18,045 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 188 flow [2023-08-30 16:33:18,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:18,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:18,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 16:33:18,046 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 16:33:18,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:18,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1725942281, now seen corresponding path program 1 times [2023-08-30 16:33:18,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:18,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542280374] [2023-08-30 16:33:18,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:18,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:18,075 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 16:33:18,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:18,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542280374] [2023-08-30 16:33:18,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542280374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:18,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:18,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:33:18,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857742720] [2023-08-30 16:33:18,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:18,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:33:18,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:18,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:33:18,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:33:18,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 198 [2023-08-30 16:33:18,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:18,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 198 [2023-08-30 16:33:18,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:18,196 INFO L130 PetriNetUnfolder]: 794/2336 cut-off events. [2023-08-30 16:33:18,196 INFO L131 PetriNetUnfolder]: For 503/503 co-relation queries the response was YES. [2023-08-30 16:33:18,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4696 conditions, 2336 events. 794/2336 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 17761 event pairs, 99 based on Foata normal form. 1373/3703 useless extension candidates. Maximal degree in co-relation 4680. Up to 881 conditions per place. [2023-08-30 16:33:18,205 INFO L137 encePairwiseOnDemand]: 188/198 looper letters, 15 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2023-08-30 16:33:18,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 244 flow [2023-08-30 16:33:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:33:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:33:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-08-30 16:33:18,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51010101010101 [2023-08-30 16:33:18,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-08-30 16:33:18,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-08-30 16:33:18,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:18,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-08-30 16:33:18,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,208 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 188 flow. Second operand 3 states and 303 transitions. [2023-08-30 16:33:18,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 244 flow [2023-08-30 16:33:18,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 224 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 16:33:18,211 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 164 flow [2023-08-30 16:33:18,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-08-30 16:33:18,212 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-30 16:33:18,212 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 164 flow [2023-08-30 16:33:18,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:18,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:18,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 16:33:18,212 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 16:33:18,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:18,214 INFO L85 PathProgramCache]: Analyzing trace with hash -593785338, now seen corresponding path program 1 times [2023-08-30 16:33:18,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:18,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850636173] [2023-08-30 16:33:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:18,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:18,255 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 16:33:18,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850636173] [2023-08-30 16:33:18,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850636173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:18,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:18,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:33:18,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309685846] [2023-08-30 16:33:18,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:18,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:33:18,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:33:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:33:18,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 198 [2023-08-30 16:33:18,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:18,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 198 [2023-08-30 16:33:18,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:18,575 INFO L130 PetriNetUnfolder]: 1997/4329 cut-off events. [2023-08-30 16:33:18,575 INFO L131 PetriNetUnfolder]: For 1660/1661 co-relation queries the response was YES. [2023-08-30 16:33:18,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11234 conditions, 4329 events. 1997/4329 cut-off events. For 1660/1661 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 35055 event pairs, 65 based on Foata normal form. 0/4276 useless extension candidates. Maximal degree in co-relation 11219. Up to 2808 conditions per place. [2023-08-30 16:33:18,591 INFO L137 encePairwiseOnDemand]: 184/198 looper letters, 71 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2023-08-30 16:33:18,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 104 transitions, 580 flow [2023-08-30 16:33:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:33:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:33:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 497 transitions. [2023-08-30 16:33:18,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41835016835016836 [2023-08-30 16:33:18,592 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 497 transitions. [2023-08-30 16:33:18,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 497 transitions. [2023-08-30 16:33:18,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:18,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 497 transitions. [2023-08-30 16:33:18,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,595 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,595 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 164 flow. Second operand 6 states and 497 transitions. [2023-08-30 16:33:18,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 104 transitions, 580 flow [2023-08-30 16:33:18,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 104 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:33:18,598 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 322 flow [2023-08-30 16:33:18,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-30 16:33:18,599 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-08-30 16:33:18,612 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 322 flow [2023-08-30 16:33:18,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:18,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:18,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:18,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 16:33:18,613 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 16:33:18,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:18,614 INFO L85 PathProgramCache]: Analyzing trace with hash 927519517, now seen corresponding path program 2 times [2023-08-30 16:33:18,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:18,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054943796] [2023-08-30 16:33:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:18,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:18,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:18,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054943796] [2023-08-30 16:33:18,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054943796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:33:18,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15420983] [2023-08-30 16:33:18,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:33:18,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:18,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:33:18,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:33:18,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 16:33:18,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:33:18,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:33:18,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 16:33:18,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:33:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:18,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:33:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15420983] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:33:18,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:33:18,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 16:33:18,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368834164] [2023-08-30 16:33:18,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:33:18,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:33:18,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:33:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-30 16:33:19,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 198 [2023-08-30 16:33:19,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 322 flow. Second operand has 20 states, 20 states have (on average 70.85) internal successors, (1417), 20 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:19,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:19,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 198 [2023-08-30 16:33:19,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:19,967 INFO L130 PetriNetUnfolder]: 3472/6945 cut-off events. [2023-08-30 16:33:19,968 INFO L131 PetriNetUnfolder]: For 3051/3051 co-relation queries the response was YES. [2023-08-30 16:33:19,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19032 conditions, 6945 events. 3472/6945 cut-off events. For 3051/3051 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 59671 event pairs, 51 based on Foata normal form. 40/6983 useless extension candidates. Maximal degree in co-relation 19012. Up to 3249 conditions per place. [2023-08-30 16:33:20,006 INFO L137 encePairwiseOnDemand]: 180/198 looper letters, 104 selfloop transitions, 45 changer transitions 0/159 dead transitions. [2023-08-30 16:33:20,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 159 transitions, 1009 flow [2023-08-30 16:33:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 16:33:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 16:33:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 886 transitions. [2023-08-30 16:33:20,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067952249770432 [2023-08-30 16:33:20,009 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 886 transitions. [2023-08-30 16:33:20,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 886 transitions. [2023-08-30 16:33:20,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:20,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 886 transitions. [2023-08-30 16:33:20,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 80.54545454545455) internal successors, (886), 11 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:20,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:20,013 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:20,013 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 322 flow. Second operand 11 states and 886 transitions. [2023-08-30 16:33:20,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 159 transitions, 1009 flow [2023-08-30 16:33:20,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 159 transitions, 1009 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:33:20,020 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 603 flow [2023-08-30 16:33:20,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=603, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2023-08-30 16:33:20,021 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2023-08-30 16:33:20,021 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 603 flow [2023-08-30 16:33:20,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.85) internal successors, (1417), 20 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:20,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:20,022 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:20,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 16:33:20,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:20,226 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 16:33:20,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1534885226, now seen corresponding path program 3 times [2023-08-30 16:33:20,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:20,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757516957] [2023-08-30 16:33:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:20,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:20,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:20,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757516957] [2023-08-30 16:33:20,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757516957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:33:20,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757195052] [2023-08-30 16:33:20,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:33:20,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:20,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:33:20,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:33:20,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 16:33:20,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 16:33:20,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:33:20,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 16:33:20,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:33:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:20,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:33:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:20,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757195052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:33:20,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:33:20,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-30 16:33:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286607476] [2023-08-30 16:33:20,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:33:20,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 16:33:20,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 16:33:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-30 16:33:20,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 198 [2023-08-30 16:33:20,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 603 flow. Second operand has 24 states, 24 states have (on average 67.125) internal successors, (1611), 24 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:20,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:20,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 198 [2023-08-30 16:33:20,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:22,374 INFO L130 PetriNetUnfolder]: 6612/13032 cut-off events. [2023-08-30 16:33:22,374 INFO L131 PetriNetUnfolder]: For 10994/10995 co-relation queries the response was YES. [2023-08-30 16:33:22,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41797 conditions, 13032 events. 6612/13032 cut-off events. For 10994/10995 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 117468 event pairs, 61 based on Foata normal form. 156/13187 useless extension candidates. Maximal degree in co-relation 41770. Up to 3162 conditions per place. [2023-08-30 16:33:22,401 INFO L137 encePairwiseOnDemand]: 180/198 looper letters, 0 selfloop transitions, 0 changer transitions 211/211 dead transitions. [2023-08-30 16:33:22,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 211 transitions, 1647 flow [2023-08-30 16:33:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 16:33:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 16:33:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1111 transitions. [2023-08-30 16:33:22,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37407407407407406 [2023-08-30 16:33:22,404 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1111 transitions. [2023-08-30 16:33:22,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1111 transitions. [2023-08-30 16:33:22,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:22,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1111 transitions. [2023-08-30 16:33:22,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 74.06666666666666) internal successors, (1111), 15 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:22,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:22,409 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:22,409 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 603 flow. Second operand 15 states and 1111 transitions. [2023-08-30 16:33:22,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 211 transitions, 1647 flow [2023-08-30 16:33:22,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 211 transitions, 1573 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-30 16:33:22,431 INFO L231 Difference]: Finished difference. Result has 84 places, 0 transitions, 0 flow [2023-08-30 16:33:22,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=84, PETRI_TRANSITIONS=0} [2023-08-30 16:33:22,432 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 27 predicate places. [2023-08-30 16:33:22,432 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 0 transitions, 0 flow [2023-08-30 16:33:22,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 67.125) internal successors, (1611), 24 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:22,432 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-30 16:33:22,433 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 16:33:22,433 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 16:33:22,433 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 16:33:22,433 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 16:33:22,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 16:33:22,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 16:33:22,637 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-30 16:33:22,638 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:33:22,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 142 transitions, 348 flow [2023-08-30 16:33:22,645 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-08-30 16:33:22,645 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:33:22,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 145 events. 16/145 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 284 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 165. Up to 10 conditions per place. [2023-08-30 16:33:22,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 142 transitions, 348 flow [2023-08-30 16:33:22,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 233 flow [2023-08-30 16:33:22,646 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:22,646 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 233 flow [2023-08-30 16:33:22,647 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 233 flow [2023-08-30 16:33:22,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 233 flow [2023-08-30 16:33:22,652 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-08-30 16:33:22,653 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:33:22,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 145 events. 16/145 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 273 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 144. Up to 10 conditions per place. [2023-08-30 16:33:22,655 INFO L119 LiptonReduction]: Number of co-enabled transitions 4862 [2023-08-30 16:33:23,499 INFO L134 LiptonReduction]: Checked pairs total: 18220 [2023-08-30 16:33:23,499 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-30 16:33:23,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:33:23,500 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:23,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:33:23,503 INFO L130 PetriNetUnfolder]: 5/62 cut-off events. [2023-08-30 16:33:23,504 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:33:23,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:23,504 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:23,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:33:23,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:23,504 INFO L85 PathProgramCache]: Analyzing trace with hash -632524383, now seen corresponding path program 1 times [2023-08-30 16:33:23,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:23,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349605385] [2023-08-30 16:33:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:23,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:23,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:33:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:23,517 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:33:23,517 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:33:23,518 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 16:33:23,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 16:33:23,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 16:33:23,518 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:33:23,518 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 16:33:23,518 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:33:23,518 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 16:33:23,537 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:33:23,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 169 transitions, 428 flow [2023-08-30 16:33:23,545 INFO L130 PetriNetUnfolder]: 19/170 cut-off events. [2023-08-30 16:33:23,546 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:33:23,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 170 events. 19/170 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 331 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 197. Up to 12 conditions per place. [2023-08-30 16:33:23,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 169 transitions, 428 flow [2023-08-30 16:33:23,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 112 transitions, 272 flow [2023-08-30 16:33:23,547 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:23,547 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 112 transitions, 272 flow [2023-08-30 16:33:23,547 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 112 transitions, 272 flow [2023-08-30 16:33:23,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 112 transitions, 272 flow [2023-08-30 16:33:23,554 INFO L130 PetriNetUnfolder]: 19/170 cut-off events. [2023-08-30 16:33:23,554 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:33:23,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 170 events. 19/170 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 329 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 176. Up to 12 conditions per place. [2023-08-30 16:33:23,557 INFO L119 LiptonReduction]: Number of co-enabled transitions 6760 [2023-08-30 16:33:24,399 INFO L134 LiptonReduction]: Checked pairs total: 22852 [2023-08-30 16:33:24,399 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-30 16:33:24,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:33:24,401 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:24,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 16:33:24,402 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 16:33:24,402 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:33:24,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:24,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:33:24,402 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 16:33:24,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1296764710, now seen corresponding path program 1 times [2023-08-30 16:33:24,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:24,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054193761] [2023-08-30 16:33:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:24,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:24,432 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 16:33:24,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:24,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054193761] [2023-08-30 16:33:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054193761] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:24,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:24,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:33:24,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695480183] [2023-08-30 16:33:24,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:24,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:33:24,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:24,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:33:24,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:33:24,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 230 [2023-08-30 16:33:24,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:24,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:24,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 230 [2023-08-30 16:33:24,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:48,832 INFO L130 PetriNetUnfolder]: 321313/408610 cut-off events. [2023-08-30 16:33:48,832 INFO L131 PetriNetUnfolder]: For 103126/103126 co-relation queries the response was YES. [2023-08-30 16:33:49,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835609 conditions, 408610 events. 321313/408610 cut-off events. For 103126/103126 co-relation queries the response was YES. Maximal size of possible extension queue 10315. Compared 2630573 event pairs, 101379 based on Foata normal form. 0/400803 useless extension candidates. Maximal degree in co-relation 835595. Up to 281255 conditions per place. [2023-08-30 16:33:51,509 INFO L137 encePairwiseOnDemand]: 209/230 looper letters, 49 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2023-08-30 16:33:51,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 362 flow [2023-08-30 16:33:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:33:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:33:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-30 16:33:51,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826086956521739 [2023-08-30 16:33:51,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-30 16:33:51,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-30 16:33:51,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:51,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-30 16:33:51,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:51,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:51,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:51,513 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 168 flow. Second operand 3 states and 333 transitions. [2023-08-30 16:33:51,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 362 flow [2023-08-30 16:33:51,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 329 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-30 16:33:51,556 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 225 flow [2023-08-30 16:33:51,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-08-30 16:33:51,556 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2023-08-30 16:33:51,556 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 225 flow [2023-08-30 16:33:51,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:51,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:51,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:51,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 16:33:51,557 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 16:33:51,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:51,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1246308315, now seen corresponding path program 1 times [2023-08-30 16:33:51,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:51,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665471615] [2023-08-30 16:33:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:51,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:51,583 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 16:33:51,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:51,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665471615] [2023-08-30 16:33:51,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665471615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:51,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:51,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:33:51,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396984625] [2023-08-30 16:33:51,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:51,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:33:51,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:33:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:33:51,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 230 [2023-08-30 16:33:51,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:51,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:51,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 230 [2023-08-30 16:33:51,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:51,870 INFO L130 PetriNetUnfolder]: 1961/5599 cut-off events. [2023-08-30 16:33:51,871 INFO L131 PetriNetUnfolder]: For 1222/1222 co-relation queries the response was YES. [2023-08-30 16:33:51,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11227 conditions, 5599 events. 1961/5599 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 49588 event pairs, 251 based on Foata normal form. 4093/9648 useless extension candidates. Maximal degree in co-relation 11210. Up to 2143 conditions per place. [2023-08-30 16:33:51,894 INFO L137 encePairwiseOnDemand]: 218/230 looper letters, 17 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2023-08-30 16:33:51,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 290 flow [2023-08-30 16:33:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:33:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:33:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-30 16:33:51,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115942028985507 [2023-08-30 16:33:51,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-30 16:33:51,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-30 16:33:51,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:51,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-30 16:33:51,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:51,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:51,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:51,897 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 225 flow. Second operand 3 states and 353 transitions. [2023-08-30 16:33:51,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 290 flow [2023-08-30 16:33:51,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 266 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 16:33:51,904 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 195 flow [2023-08-30 16:33:51,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-30 16:33:51,904 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2023-08-30 16:33:51,904 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 195 flow [2023-08-30 16:33:51,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:51,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:51,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:51,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 16:33:51,905 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 16:33:51,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:51,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1431373237, now seen corresponding path program 1 times [2023-08-30 16:33:51,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:51,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213212324] [2023-08-30 16:33:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:51,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:51,943 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 16:33:51,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:51,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213212324] [2023-08-30 16:33:51,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213212324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:51,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:51,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:33:51,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197621137] [2023-08-30 16:33:51,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:51,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:33:51,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:33:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:33:51,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 230 [2023-08-30 16:33:51,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:51,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:51,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 230 [2023-08-30 16:33:51,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:52,653 INFO L130 PetriNetUnfolder]: 4684/9857 cut-off events. [2023-08-30 16:33:52,654 INFO L131 PetriNetUnfolder]: For 3820/3820 co-relation queries the response was YES. [2023-08-30 16:33:52,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25719 conditions, 9857 events. 4684/9857 cut-off events. For 3820/3820 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 88047 event pairs, 117 based on Foata normal form. 0/9739 useless extension candidates. Maximal degree in co-relation 25703. Up to 7092 conditions per place. [2023-08-30 16:33:52,702 INFO L137 encePairwiseOnDemand]: 213/230 looper letters, 85 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2023-08-30 16:33:52,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 125 transitions, 705 flow [2023-08-30 16:33:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:33:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:33:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 574 transitions. [2023-08-30 16:33:52,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41594202898550725 [2023-08-30 16:33:52,706 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 574 transitions. [2023-08-30 16:33:52,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 574 transitions. [2023-08-30 16:33:52,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:52,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 574 transitions. [2023-08-30 16:33:52,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:52,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:52,708 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:52,708 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 195 flow. Second operand 6 states and 574 transitions. [2023-08-30 16:33:52,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 125 transitions, 705 flow [2023-08-30 16:33:52,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 125 transitions, 674 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:33:52,714 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 392 flow [2023-08-30 16:33:52,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2023-08-30 16:33:52,715 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-30 16:33:52,715 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 392 flow [2023-08-30 16:33:52,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:52,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:52,715 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:52,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 16:33:52,716 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 16:33:52,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1994025894, now seen corresponding path program 2 times [2023-08-30 16:33:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:52,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894624911] [2023-08-30 16:33:52,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:52,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:52,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894624911] [2023-08-30 16:33:52,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894624911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:33:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774294330] [2023-08-30 16:33:52,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:33:52,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:52,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:33:52,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:33:52,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 16:33:52,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:33:52,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:33:52,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 16:33:52,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:33:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:52,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:33:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:53,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774294330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:33:53,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:33:53,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 16:33:53,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399379959] [2023-08-30 16:33:53,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:33:53,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:33:53,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:33:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-30 16:33:53,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 230 [2023-08-30 16:33:53,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 392 flow. Second operand has 20 states, 20 states have (on average 80.85) internal successors, (1617), 20 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:53,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:53,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 230 [2023-08-30 16:33:53,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:54,593 INFO L130 PetriNetUnfolder]: 7898/15366 cut-off events. [2023-08-30 16:33:54,593 INFO L131 PetriNetUnfolder]: For 7010/7010 co-relation queries the response was YES. [2023-08-30 16:33:54,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42381 conditions, 15366 events. 7898/15366 cut-off events. For 7010/7010 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 143555 event pairs, 77 based on Foata normal form. 70/15432 useless extension candidates. Maximal degree in co-relation 42360. Up to 8359 conditions per place. [2023-08-30 16:33:54,659 INFO L137 encePairwiseOnDemand]: 208/230 looper letters, 127 selfloop transitions, 56 changer transitions 0/194 dead transitions. [2023-08-30 16:33:54,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 194 transitions, 1251 flow [2023-08-30 16:33:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 16:33:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 16:33:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1027 transitions. [2023-08-30 16:33:54,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059288537549407 [2023-08-30 16:33:54,661 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1027 transitions. [2023-08-30 16:33:54,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1027 transitions. [2023-08-30 16:33:54,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:54,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1027 transitions. [2023-08-30 16:33:54,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 93.36363636363636) internal successors, (1027), 11 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:54,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:54,665 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:54,665 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 392 flow. Second operand 11 states and 1027 transitions. [2023-08-30 16:33:54,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 194 transitions, 1251 flow [2023-08-30 16:33:54,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 194 transitions, 1251 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:33:54,679 INFO L231 Difference]: Finished difference. Result has 85 places, 113 transitions, 742 flow [2023-08-30 16:33:54,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=742, PETRI_PLACES=85, PETRI_TRANSITIONS=113} [2023-08-30 16:33:54,679 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 18 predicate places. [2023-08-30 16:33:54,679 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 113 transitions, 742 flow [2023-08-30 16:33:54,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 80.85) internal successors, (1617), 20 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:54,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:54,680 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:54,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 16:33:54,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 16:33:54,884 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 16:33:54,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:54,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2090518825, now seen corresponding path program 3 times [2023-08-30 16:33:54,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:54,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063486199] [2023-08-30 16:33:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:54,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:54,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:54,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063486199] [2023-08-30 16:33:54,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063486199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:33:54,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488448974] [2023-08-30 16:33:54,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:33:54,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:33:54,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:33:54,957 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:33:54,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 16:33:55,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 16:33:55,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:33:55,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 16:33:55,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:33:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:55,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:33:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:55,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488448974] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:33:55,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:33:55,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-30 16:33:55,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243296896] [2023-08-30 16:33:55,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:33:55,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 16:33:55,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:55,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 16:33:55,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-30 16:33:55,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 230 [2023-08-30 16:33:55,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 113 transitions, 742 flow. Second operand has 24 states, 24 states have (on average 76.125) internal successors, (1827), 24 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:55,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:55,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 230 [2023-08-30 16:33:55,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:58,518 INFO L130 PetriNetUnfolder]: 16174/31113 cut-off events. [2023-08-30 16:33:58,518 INFO L131 PetriNetUnfolder]: For 27035/27035 co-relation queries the response was YES. [2023-08-30 16:33:58,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100159 conditions, 31113 events. 16174/31113 cut-off events. For 27035/27035 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 310310 event pairs, 85 based on Foata normal form. 342/31451 useless extension candidates. Maximal degree in co-relation 100131. Up to 7404 conditions per place. [2023-08-30 16:33:58,612 INFO L137 encePairwiseOnDemand]: 208/230 looper letters, 0 selfloop transitions, 0 changer transitions 258/258 dead transitions. [2023-08-30 16:33:58,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 258 transitions, 2045 flow [2023-08-30 16:33:58,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 16:33:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 16:33:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1279 transitions. [2023-08-30 16:33:58,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37072463768115943 [2023-08-30 16:33:58,615 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1279 transitions. [2023-08-30 16:33:58,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1279 transitions. [2023-08-30 16:33:58,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:58,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1279 transitions. [2023-08-30 16:33:58,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.26666666666667) internal successors, (1279), 15 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:58,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 230.0) internal successors, (3680), 16 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:58,619 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 230.0) internal successors, (3680), 16 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:58,619 INFO L175 Difference]: Start difference. First operand has 85 places, 113 transitions, 742 flow. Second operand 15 states and 1279 transitions. [2023-08-30 16:33:58,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 258 transitions, 2045 flow [2023-08-30 16:33:58,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 258 transitions, 1953 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-30 16:33:58,708 INFO L231 Difference]: Finished difference. Result has 93 places, 0 transitions, 0 flow [2023-08-30 16:33:58,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=93, PETRI_TRANSITIONS=0} [2023-08-30 16:33:58,708 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 26 predicate places. [2023-08-30 16:33:58,708 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 0 transitions, 0 flow [2023-08-30 16:33:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 76.125) internal successors, (1827), 24 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:58,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-30 16:33:58,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 16:33:58,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 16:33:58,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 16:33:58,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 16:33:58,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 16:33:58,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-30 16:33:58,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 16:33:58,913 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-30 16:33:58,914 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:33:58,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 169 transitions, 428 flow [2023-08-30 16:33:58,923 INFO L130 PetriNetUnfolder]: 19/170 cut-off events. [2023-08-30 16:33:58,923 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:33:58,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 170 events. 19/170 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 331 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 197. Up to 12 conditions per place. [2023-08-30 16:33:58,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 169 transitions, 428 flow [2023-08-30 16:33:58,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 112 transitions, 272 flow [2023-08-30 16:33:58,924 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:58,924 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 112 transitions, 272 flow [2023-08-30 16:33:58,924 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 112 transitions, 272 flow [2023-08-30 16:33:58,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 112 transitions, 272 flow [2023-08-30 16:33:58,932 INFO L130 PetriNetUnfolder]: 19/170 cut-off events. [2023-08-30 16:33:58,932 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:33:58,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 170 events. 19/170 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 329 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 176. Up to 12 conditions per place. [2023-08-30 16:33:58,935 INFO L119 LiptonReduction]: Number of co-enabled transitions 6760 [2023-08-30 16:33:59,712 INFO L134 LiptonReduction]: Checked pairs total: 23480 [2023-08-30 16:33:59,712 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-30 16:33:59,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:33:59,713 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:59,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:33:59,717 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2023-08-30 16:33:59,717 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:33:59,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:59,717 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:59,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:33:59,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:59,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1840629916, now seen corresponding path program 1 times [2023-08-30 16:33:59,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:59,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151854955] [2023-08-30 16:33:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:59,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:59,725 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:33:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:59,731 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:33:59,731 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:33:59,731 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 16:33:59,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 16:33:59,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 16:33:59,731 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:33:59,732 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 16:33:59,732 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:33:59,732 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 16:33:59,765 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:33:59,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 196 transitions, 512 flow [2023-08-30 16:33:59,776 INFO L130 PetriNetUnfolder]: 22/195 cut-off events. [2023-08-30 16:33:59,784 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:33:59,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 195 events. 22/195 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 384 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 230. Up to 14 conditions per place. [2023-08-30 16:33:59,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 196 transitions, 512 flow [2023-08-30 16:33:59,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 125 transitions, 313 flow [2023-08-30 16:33:59,785 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:59,786 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 125 transitions, 313 flow [2023-08-30 16:33:59,786 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 125 transitions, 313 flow [2023-08-30 16:33:59,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 125 transitions, 313 flow [2023-08-30 16:33:59,794 INFO L130 PetriNetUnfolder]: 22/195 cut-off events. [2023-08-30 16:33:59,808 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:33:59,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 195 events. 22/195 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 383 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 209. Up to 14 conditions per place. [2023-08-30 16:33:59,812 INFO L119 LiptonReduction]: Number of co-enabled transitions 8970 [2023-08-30 16:34:00,607 INFO L134 LiptonReduction]: Checked pairs total: 31470 [2023-08-30 16:34:00,607 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-30 16:34:00,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:34:00,609 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;@73dd9c88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:34:00,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 16:34:00,610 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 16:34:00,610 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:34:00,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:00,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 16:34:00,610 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 16:34:00,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1630548300, now seen corresponding path program 1 times [2023-08-30 16:34:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:00,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095289836] [2023-08-30 16:34:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:00,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:00,642 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 16:34:00,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:00,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095289836] [2023-08-30 16:34:00,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095289836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:00,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:00,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:34:00,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948963541] [2023-08-30 16:34:00,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:00,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:34:00,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:00,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:34:00,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:34:00,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 262 [2023-08-30 16:34:00,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:34:00,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:00,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 262 [2023-08-30 16:34:00,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand