./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa --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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:04:30,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:04:30,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:04:30,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:04:30,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:04:30,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:04:30,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:04:30,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:04:30,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:04:30,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:04:30,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:04:30,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:04:30,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:04:30,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:04:30,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:04:30,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:04:30,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:04:30,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:04:30,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:04:30,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:04:30,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:04:30,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:04:30,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:04:30,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:04:30,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:04:30,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:04:30,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:04:30,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:04:30,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:04:30,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:04:30,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:04:30,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:04:30,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:04:30,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:04:30,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:04:30,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:04:30,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:04:30,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:04:30,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:04:30,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:04:30,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:04:30,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:04:30,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:04:30,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:04:30,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:04:30,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:04:30,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:04:30,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:04:30,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:04:30,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:04:30,995 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:04:30,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:04:30,995 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:04:30,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:04:30,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:04:30,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:04:30,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:04:30,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:04:30,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:04:30,997 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:04:30,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:04:30,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:04:30,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:04:30,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:04:30,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:04:30,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:04:30,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:04:30,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:04:30,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:04:30,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:04:30,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:04:30,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:04:30,999 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:04:30,999 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:04:30,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:04:31,000 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:04:31,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2021-12-06 22:04:31,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:04:31,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:04:31,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:04:31,205 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:04:31,206 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:04:31,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-12-06 22:04:31,249 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/data/e7521f646/2ce1195b9a2049f9af75520b3e2dffb0/FLAG2ce25affa [2021-12-06 22:04:31,611 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:04:31,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-12-06 22:04:31,617 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/data/e7521f646/2ce1195b9a2049f9af75520b3e2dffb0/FLAG2ce25affa [2021-12-06 22:04:31,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/data/e7521f646/2ce1195b9a2049f9af75520b3e2dffb0 [2021-12-06 22:04:31,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:04:31,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:04:31,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:04:31,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:04:31,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:04:31,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12957021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31, skipping insertion in model container [2021-12-06 22:04:31,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:04:31,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:04:31,804 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2021-12-06 22:04:31,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:04:31,817 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:04:31,831 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2021-12-06 22:04:31,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:04:31,845 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:04:31,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31 WrapperNode [2021-12-06 22:04:31,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:04:31,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:04:31,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:04:31,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:04:31,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,883 INFO L137 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 112 [2021-12-06 22:04:31,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:04:31,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:04:31,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:04:31,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:04:31,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:04:31,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:04:31,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:04:31,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:04:31,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (1/1) ... [2021-12-06 22:04:31,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:04:31,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:04:31,933 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:04:31,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:04:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:04:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 22:04:31,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 22:04:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 22:04:31,963 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 22:04:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:04:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:04:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:04:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 22:04:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:04:31,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:04:31,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:04:31,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:04:31,965 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 22:04:32,029 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:04:32,030 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:04:32,217 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:04:32,225 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:04:32,225 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 22:04:32,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:04:32 BoogieIcfgContainer [2021-12-06 22:04:32,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:04:32,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:04:32,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:04:32,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:04:32,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:04:31" (1/3) ... [2021-12-06 22:04:32,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e31dd9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:04:32, skipping insertion in model container [2021-12-06 22:04:32,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:04:31" (2/3) ... [2021-12-06 22:04:32,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e31dd9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:04:32, skipping insertion in model container [2021-12-06 22:04:32,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:04:32" (3/3) ... [2021-12-06 22:04:32,233 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2021-12-06 22:04:32,236 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 22:04:32,236 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:04:32,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:04:32,237 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 22:04:32,259 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,260 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,260 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,260 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,260 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,265 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,265 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,265 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,265 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,266 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,266 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,266 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,266 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,266 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,266 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,266 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,266 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,266 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,267 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,268 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,268 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,268 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,268 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,268 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,268 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,269 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,269 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,269 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,269 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,269 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,269 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,269 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,271 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,272 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,272 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,274 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,274 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,274 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,274 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,274 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:04:32,280 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 22:04:32,329 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:04:32,337 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:04:32,337 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 22:04:32,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 174 transitions, 364 flow [2021-12-06 22:04:32,421 INFO L129 PetriNetUnfolder]: 15/172 cut-off events. [2021-12-06 22:04:32,421 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 22:04:32,424 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 15/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2021-12-06 22:04:32,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 174 transitions, 364 flow [2021-12-06 22:04:32,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 163 transitions, 338 flow [2021-12-06 22:04:32,456 INFO L129 PetriNetUnfolder]: 15/162 cut-off events. [2021-12-06 22:04:32,457 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 22:04:32,457 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:32,458 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:32,458 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:32,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:32,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1906392923, now seen corresponding path program 1 times [2021-12-06 22:04:32,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:32,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177906542] [2021-12-06 22:04:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:32,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:04:32,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:32,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177906542] [2021-12-06 22:04:32,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177906542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:32,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:32,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:04:32,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210696956] [2021-12-06 22:04:32,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:32,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:04:32,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:32,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:04:32,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:04:32,692 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 174 [2021-12-06 22:04:32,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 163 transitions, 338 flow. Second operand has 2 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:32,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:32,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 174 [2021-12-06 22:04:32,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:32,726 INFO L129 PetriNetUnfolder]: 6/154 cut-off events. [2021-12-06 22:04:32,726 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-06 22:04:32,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 154 events. 6/154 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 111 event pairs, 0 based on Foata normal form. 11/154 useless extension candidates. Maximal degree in co-relation 125. Up to 5 conditions per place. [2021-12-06 22:04:32,728 INFO L132 encePairwiseOnDemand]: 165/174 looper letters, 4 selfloop transitions, 0 changer transitions 5/154 dead transitions. [2021-12-06 22:04:32,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 328 flow [2021-12-06 22:04:32,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:04:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 22:04:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 333 transitions. [2021-12-06 22:04:32,739 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9568965517241379 [2021-12-06 22:04:32,740 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 333 transitions. [2021-12-06 22:04:32,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 333 transitions. [2021-12-06 22:04:32,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:32,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 333 transitions. [2021-12-06 22:04:32,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.5) internal successors, (333), 2 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) [2021-12-06 22:04:32,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:32,751 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:32,753 INFO L186 Difference]: Start difference. First operand has 155 places, 163 transitions, 338 flow. Second operand 2 states and 333 transitions. [2021-12-06 22:04:32,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 328 flow [2021-12-06 22:04:32,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 154 transitions, 320 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 22:04:32,760 INFO L242 Difference]: Finished difference. Result has 152 places, 149 transitions, 302 flow [2021-12-06 22:04:32,761 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=302, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2021-12-06 22:04:32,764 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, -3 predicate places. [2021-12-06 22:04:32,765 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 302 flow [2021-12-06 22:04:32,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:32,765 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:32,765 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:32,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:04:32,766 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:32,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2116646914, now seen corresponding path program 1 times [2021-12-06 22:04:32,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:32,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875203946] [2021-12-06 22:04:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:32,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:04:33,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:33,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875203946] [2021-12-06 22:04:33,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875203946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:33,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:33,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:04:33,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857964378] [2021-12-06 22:04:33,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:33,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:04:33,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:33,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:04:33,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:04:33,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 174 [2021-12-06 22:04:33,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:33,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 174 [2021-12-06 22:04:33,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:33,209 INFO L129 PetriNetUnfolder]: 171/632 cut-off events. [2021-12-06 22:04:33,209 INFO L130 PetriNetUnfolder]: For 22/35 co-relation queries the response was YES. [2021-12-06 22:04:33,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 964 conditions, 632 events. 171/632 cut-off events. For 22/35 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3069 event pairs, 41 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 961. Up to 122 conditions per place. [2021-12-06 22:04:33,217 INFO L132 encePairwiseOnDemand]: 167/174 looper letters, 65 selfloop transitions, 5 changer transitions 4/185 dead transitions. [2021-12-06 22:04:33,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 185 transitions, 527 flow [2021-12-06 22:04:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:04:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 22:04:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 801 transitions. [2021-12-06 22:04:33,223 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7672413793103449 [2021-12-06 22:04:33,223 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 801 transitions. [2021-12-06 22:04:33,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 801 transitions. [2021-12-06 22:04:33,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:33,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 801 transitions. [2021-12-06 22:04:33,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,231 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,231 INFO L186 Difference]: Start difference. First operand has 152 places, 149 transitions, 302 flow. Second operand 6 states and 801 transitions. [2021-12-06 22:04:33,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 185 transitions, 527 flow [2021-12-06 22:04:33,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 185 transitions, 527 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 22:04:33,235 INFO L242 Difference]: Finished difference. Result has 155 places, 152 transitions, 331 flow [2021-12-06 22:04:33,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2021-12-06 22:04:33,236 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2021-12-06 22:04:33,237 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 331 flow [2021-12-06 22:04:33,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,237 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:33,237 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:33,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:04:33,238 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:33,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:33,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1543221727, now seen corresponding path program 1 times [2021-12-06 22:04:33,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:33,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977571171] [2021-12-06 22:04:33,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:33,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:04:33,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:33,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977571171] [2021-12-06 22:04:33,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977571171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:33,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:33,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:04:33,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842781795] [2021-12-06 22:04:33,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:33,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:04:33,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:33,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:04:33,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:04:33,358 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-12-06 22:04:33,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:33,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-12-06 22:04:33,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:33,574 INFO L129 PetriNetUnfolder]: 120/694 cut-off events. [2021-12-06 22:04:33,574 INFO L130 PetriNetUnfolder]: For 28/38 co-relation queries the response was YES. [2021-12-06 22:04:33,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 694 events. 120/694 cut-off events. For 28/38 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3411 event pairs, 38 based on Foata normal form. 0/607 useless extension candidates. Maximal degree in co-relation 991. Up to 86 conditions per place. [2021-12-06 22:04:33,580 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 64 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2021-12-06 22:04:33,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 188 transitions, 570 flow [2021-12-06 22:04:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:04:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-06 22:04:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1318 transitions. [2021-12-06 22:04:33,586 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7574712643678161 [2021-12-06 22:04:33,586 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1318 transitions. [2021-12-06 22:04:33,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1318 transitions. [2021-12-06 22:04:33,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:33,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1318 transitions. [2021-12-06 22:04:33,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.8) internal successors, (1318), 10 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,595 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,595 INFO L186 Difference]: Start difference. First operand has 155 places, 152 transitions, 331 flow. Second operand 10 states and 1318 transitions. [2021-12-06 22:04:33,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 188 transitions, 570 flow [2021-12-06 22:04:33,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 188 transitions, 566 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-06 22:04:33,600 INFO L242 Difference]: Finished difference. Result has 162 places, 156 transitions, 375 flow [2021-12-06 22:04:33,600 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=375, PETRI_PLACES=162, PETRI_TRANSITIONS=156} [2021-12-06 22:04:33,601 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 7 predicate places. [2021-12-06 22:04:33,601 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 156 transitions, 375 flow [2021-12-06 22:04:33,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,602 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:33,602 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:33,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:04:33,602 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:33,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1522524733, now seen corresponding path program 1 times [2021-12-06 22:04:33,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:33,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155816627] [2021-12-06 22:04:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:33,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:04:33,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:33,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155816627] [2021-12-06 22:04:33,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155816627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:33,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:33,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:04:33,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142917961] [2021-12-06 22:04:33,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:33,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:04:33,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:04:33,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:04:33,714 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-12-06 22:04:33,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 156 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:33,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-12-06 22:04:33,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:33,885 INFO L129 PetriNetUnfolder]: 106/574 cut-off events. [2021-12-06 22:04:33,885 INFO L130 PetriNetUnfolder]: For 77/86 co-relation queries the response was YES. [2021-12-06 22:04:33,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 574 events. 106/574 cut-off events. For 77/86 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2430 event pairs, 37 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 897. Up to 97 conditions per place. [2021-12-06 22:04:33,888 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 45 selfloop transitions, 11 changer transitions 19/186 dead transitions. [2021-12-06 22:04:33,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 186 transitions, 597 flow [2021-12-06 22:04:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:04:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-06 22:04:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1315 transitions. [2021-12-06 22:04:33,892 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7557471264367817 [2021-12-06 22:04:33,892 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1315 transitions. [2021-12-06 22:04:33,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1315 transitions. [2021-12-06 22:04:33,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:33,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1315 transitions. [2021-12-06 22:04:33,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.5) internal successors, (1315), 10 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,900 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,901 INFO L186 Difference]: Start difference. First operand has 162 places, 156 transitions, 375 flow. Second operand 10 states and 1315 transitions. [2021-12-06 22:04:33,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 186 transitions, 597 flow [2021-12-06 22:04:33,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 186 transitions, 589 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-06 22:04:33,905 INFO L242 Difference]: Finished difference. Result has 170 places, 154 transitions, 393 flow [2021-12-06 22:04:33,905 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=393, PETRI_PLACES=170, PETRI_TRANSITIONS=154} [2021-12-06 22:04:33,906 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 15 predicate places. [2021-12-06 22:04:33,906 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 154 transitions, 393 flow [2021-12-06 22:04:33,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,906 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:33,907 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:33,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:04:33,907 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1897785128, now seen corresponding path program 1 times [2021-12-06 22:04:33,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:33,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803950651] [2021-12-06 22:04:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:33,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:04:33,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:33,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803950651] [2021-12-06 22:04:33,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803950651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:33,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:33,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:04:33,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164104073] [2021-12-06 22:04:33,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:33,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:04:33,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:04:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:04:33,993 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-12-06 22:04:33,994 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 154 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:33,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:33,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-12-06 22:04:33,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:34,202 INFO L129 PetriNetUnfolder]: 121/711 cut-off events. [2021-12-06 22:04:34,202 INFO L130 PetriNetUnfolder]: For 141/151 co-relation queries the response was YES. [2021-12-06 22:04:34,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1125 conditions, 711 events. 121/711 cut-off events. For 141/151 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3685 event pairs, 38 based on Foata normal form. 6/675 useless extension candidates. Maximal degree in co-relation 1115. Up to 94 conditions per place. [2021-12-06 22:04:34,208 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 57 selfloop transitions, 10 changer transitions 0/178 dead transitions. [2021-12-06 22:04:34,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 178 transitions, 592 flow [2021-12-06 22:04:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:04:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 22:04:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1058 transitions. [2021-12-06 22:04:34,214 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7600574712643678 [2021-12-06 22:04:34,214 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1058 transitions. [2021-12-06 22:04:34,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1058 transitions. [2021-12-06 22:04:34,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:34,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1058 transitions. [2021-12-06 22:04:34,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.25) internal successors, (1058), 8 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,224 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,224 INFO L186 Difference]: Start difference. First operand has 170 places, 154 transitions, 393 flow. Second operand 8 states and 1058 transitions. [2021-12-06 22:04:34,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 178 transitions, 592 flow [2021-12-06 22:04:34,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 178 transitions, 557 flow, removed 5 selfloop flow, removed 10 redundant places. [2021-12-06 22:04:34,231 INFO L242 Difference]: Finished difference. Result has 165 places, 156 transitions, 398 flow [2021-12-06 22:04:34,231 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=398, PETRI_PLACES=165, PETRI_TRANSITIONS=156} [2021-12-06 22:04:34,232 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 10 predicate places. [2021-12-06 22:04:34,232 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 398 flow [2021-12-06 22:04:34,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,233 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:34,233 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:34,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:04:34,234 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1055001396, now seen corresponding path program 1 times [2021-12-06 22:04:34,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:34,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493385595] [2021-12-06 22:04:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:34,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:04:34,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:34,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493385595] [2021-12-06 22:04:34,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493385595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:34,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:34,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:04:34,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508377581] [2021-12-06 22:04:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:34,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:04:34,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:04:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:04:34,340 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-12-06 22:04:34,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:34,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-12-06 22:04:34,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:34,478 INFO L129 PetriNetUnfolder]: 105/546 cut-off events. [2021-12-06 22:04:34,478 INFO L130 PetriNetUnfolder]: For 101/110 co-relation queries the response was YES. [2021-12-06 22:04:34,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 546 events. 105/546 cut-off events. For 101/110 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2352 event pairs, 37 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 884. Up to 97 conditions per place. [2021-12-06 22:04:34,481 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 48 selfloop transitions, 9 changer transitions 7/175 dead transitions. [2021-12-06 22:04:34,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 175 transitions, 574 flow [2021-12-06 22:04:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:04:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 22:04:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1055 transitions. [2021-12-06 22:04:34,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7579022988505747 [2021-12-06 22:04:34,484 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1055 transitions. [2021-12-06 22:04:34,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1055 transitions. [2021-12-06 22:04:34,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:34,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1055 transitions. [2021-12-06 22:04:34,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.875) internal successors, (1055), 8 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,490 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,490 INFO L186 Difference]: Start difference. First operand has 165 places, 156 transitions, 398 flow. Second operand 8 states and 1055 transitions. [2021-12-06 22:04:34,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 175 transitions, 574 flow [2021-12-06 22:04:34,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 175 transitions, 556 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-06 22:04:34,495 INFO L242 Difference]: Finished difference. Result has 168 places, 155 transitions, 394 flow [2021-12-06 22:04:34,496 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=168, PETRI_TRANSITIONS=155} [2021-12-06 22:04:34,496 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 13 predicate places. [2021-12-06 22:04:34,497 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 155 transitions, 394 flow [2021-12-06 22:04:34,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,497 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:34,498 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:34,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:04:34,498 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1703942293, now seen corresponding path program 1 times [2021-12-06 22:04:34,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:34,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589881009] [2021-12-06 22:04:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:34,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:04:34,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:34,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589881009] [2021-12-06 22:04:34,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589881009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:04:34,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671841904] [2021-12-06 22:04:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:34,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:04:34,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:04:34,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:04:34,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:04:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:34,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:04:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:04:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:04:35,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:04:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:04:35,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671841904] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 22:04:35,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:04:35,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2021-12-06 22:04:35,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135750490] [2021-12-06 22:04:35,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:35,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:04:35,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:04:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:04:35,841 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2021-12-06 22:04:35,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 155 transitions, 394 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:35,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:35,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2021-12-06 22:04:35,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:36,154 INFO L129 PetriNetUnfolder]: 81/524 cut-off events. [2021-12-06 22:04:36,154 INFO L130 PetriNetUnfolder]: For 126/133 co-relation queries the response was YES. [2021-12-06 22:04:36,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 524 events. 81/524 cut-off events. For 126/133 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2305 event pairs, 28 based on Foata normal form. 7/499 useless extension candidates. Maximal degree in co-relation 857. Up to 80 conditions per place. [2021-12-06 22:04:36,158 INFO L132 encePairwiseOnDemand]: 160/174 looper letters, 47 selfloop transitions, 15 changer transitions 0/171 dead transitions. [2021-12-06 22:04:36,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 171 transitions, 564 flow [2021-12-06 22:04:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:04:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 22:04:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1768 transitions. [2021-12-06 22:04:36,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7257799671592775 [2021-12-06 22:04:36,162 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1768 transitions. [2021-12-06 22:04:36,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1768 transitions. [2021-12-06 22:04:36,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:36,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1768 transitions. [2021-12-06 22:04:36,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.28571428571429) internal successors, (1768), 14 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:36,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:36,171 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:36,171 INFO L186 Difference]: Start difference. First operand has 168 places, 155 transitions, 394 flow. Second operand 14 states and 1768 transitions. [2021-12-06 22:04:36,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 171 transitions, 564 flow [2021-12-06 22:04:36,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 171 transitions, 534 flow, removed 5 selfloop flow, removed 8 redundant places. [2021-12-06 22:04:36,175 INFO L242 Difference]: Finished difference. Result has 175 places, 158 transitions, 426 flow [2021-12-06 22:04:36,175 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=426, PETRI_PLACES=175, PETRI_TRANSITIONS=158} [2021-12-06 22:04:36,176 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 20 predicate places. [2021-12-06 22:04:36,176 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 158 transitions, 426 flow [2021-12-06 22:04:36,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:36,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:36,177 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:36,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:04:36,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:04:36,378 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2100548871, now seen corresponding path program 1 times [2021-12-06 22:04:36,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:36,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594412953] [2021-12-06 22:04:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:36,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:04:36,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:36,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594412953] [2021-12-06 22:04:36,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594412953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:04:36,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162161932] [2021-12-06 22:04:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:36,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:04:36,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:04:36,528 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:04:36,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:04:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:36,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:04:36,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:04:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:04:37,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:04:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:04:37,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162161932] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 22:04:37,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:04:37,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2021-12-06 22:04:37,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779948397] [2021-12-06 22:04:37,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:37,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:04:37,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:37,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:04:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:04:37,455 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2021-12-06 22:04:37,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 158 transitions, 426 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:37,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:37,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2021-12-06 22:04:37,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:37,734 INFO L129 PetriNetUnfolder]: 64/579 cut-off events. [2021-12-06 22:04:37,735 INFO L130 PetriNetUnfolder]: For 205/206 co-relation queries the response was YES. [2021-12-06 22:04:37,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 579 events. 64/579 cut-off events. For 205/206 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2857 event pairs, 23 based on Foata normal form. 1/540 useless extension candidates. Maximal degree in co-relation 932. Up to 62 conditions per place. [2021-12-06 22:04:37,739 INFO L132 encePairwiseOnDemand]: 160/174 looper letters, 52 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2021-12-06 22:04:37,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 176 transitions, 620 flow [2021-12-06 22:04:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:04:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 22:04:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1770 transitions. [2021-12-06 22:04:37,745 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7266009852216748 [2021-12-06 22:04:37,746 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1770 transitions. [2021-12-06 22:04:37,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1770 transitions. [2021-12-06 22:04:37,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:37,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1770 transitions. [2021-12-06 22:04:37,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.42857142857143) internal successors, (1770), 14 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:37,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:37,758 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:37,758 INFO L186 Difference]: Start difference. First operand has 175 places, 158 transitions, 426 flow. Second operand 14 states and 1770 transitions. [2021-12-06 22:04:37,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 176 transitions, 620 flow [2021-12-06 22:04:37,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 176 transitions, 597 flow, removed 1 selfloop flow, removed 8 redundant places. [2021-12-06 22:04:37,764 INFO L242 Difference]: Finished difference. Result has 182 places, 159 transitions, 447 flow [2021-12-06 22:04:37,764 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=447, PETRI_PLACES=182, PETRI_TRANSITIONS=159} [2021-12-06 22:04:37,765 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 27 predicate places. [2021-12-06 22:04:37,765 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 159 transitions, 447 flow [2021-12-06 22:04:37,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:37,766 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:37,766 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:37,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:04:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:04:37,967 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash 864077398, now seen corresponding path program 1 times [2021-12-06 22:04:37,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:37,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289960601] [2021-12-06 22:04:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:37,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:04:38,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:38,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289960601] [2021-12-06 22:04:38,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289960601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:04:38,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353216662] [2021-12-06 22:04:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:38,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:04:38,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:04:38,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:04:38,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:04:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:38,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 22:04:38,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:04:39,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:04:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:04:39,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:04:39,148 INFO L354 Elim1Store]: treesize reduction 56, result has 48.6 percent of original size [2021-12-06 22:04:39,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2021-12-06 22:04:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:04:39,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353216662] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:04:39,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:04:39,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 9] total 27 [2021-12-06 22:04:39,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381446300] [2021-12-06 22:04:39,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:04:39,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 22:04:39,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 22:04:39,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:04:39,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:04:39,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 159 transitions, 447 flow. Second operand has 27 states, 27 states have (on average 107.66666666666667) internal successors, (2907), 27 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:39,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:39,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:04:39,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:40,852 INFO L129 PetriNetUnfolder]: 2823/5593 cut-off events. [2021-12-06 22:04:40,852 INFO L130 PetriNetUnfolder]: For 2597/2597 co-relation queries the response was YES. [2021-12-06 22:04:40,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11960 conditions, 5593 events. 2823/5593 cut-off events. For 2597/2597 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 42068 event pairs, 189 based on Foata normal form. 0/5261 useless extension candidates. Maximal degree in co-relation 11947. Up to 1582 conditions per place. [2021-12-06 22:04:40,901 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 297 selfloop transitions, 100 changer transitions 4/494 dead transitions. [2021-12-06 22:04:40,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 494 transitions, 2157 flow [2021-12-06 22:04:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 22:04:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-06 22:04:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 5080 transitions. [2021-12-06 22:04:40,915 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.648786717752235 [2021-12-06 22:04:40,915 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 5080 transitions. [2021-12-06 22:04:40,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 5080 transitions. [2021-12-06 22:04:40,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:40,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 5080 transitions. [2021-12-06 22:04:40,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 112.88888888888889) internal successors, (5080), 45 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:40,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 174.0) internal successors, (8004), 46 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:40,956 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 174.0) internal successors, (8004), 46 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:40,956 INFO L186 Difference]: Start difference. First operand has 182 places, 159 transitions, 447 flow. Second operand 45 states and 5080 transitions. [2021-12-06 22:04:40,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 494 transitions, 2157 flow [2021-12-06 22:04:40,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 494 transitions, 2114 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-12-06 22:04:40,968 INFO L242 Difference]: Finished difference. Result has 238 places, 244 transitions, 1100 flow [2021-12-06 22:04:40,968 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1100, PETRI_PLACES=238, PETRI_TRANSITIONS=244} [2021-12-06 22:04:40,969 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 83 predicate places. [2021-12-06 22:04:40,969 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 244 transitions, 1100 flow [2021-12-06 22:04:40,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.66666666666667) internal successors, (2907), 27 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:40,970 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:40,970 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:40,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:04:41,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:04:41,172 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:41,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1472592122, now seen corresponding path program 2 times [2021-12-06 22:04:41,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:41,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319524912] [2021-12-06 22:04:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:41,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:04:41,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319524912] [2021-12-06 22:04:41,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319524912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:41,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:41,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:04:41,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189551601] [2021-12-06 22:04:41,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:41,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:04:41,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:04:41,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:04:41,653 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:04:41,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 244 transitions, 1100 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:41,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:41,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:04:41,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:42,901 INFO L129 PetriNetUnfolder]: 2844/5683 cut-off events. [2021-12-06 22:04:42,901 INFO L130 PetriNetUnfolder]: For 13335/13359 co-relation queries the response was YES. [2021-12-06 22:04:42,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17373 conditions, 5683 events. 2844/5683 cut-off events. For 13335/13359 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 42829 event pairs, 568 based on Foata normal form. 9/5657 useless extension candidates. Maximal degree in co-relation 17337. Up to 2871 conditions per place. [2021-12-06 22:04:42,955 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 193 selfloop transitions, 81 changer transitions 40/407 dead transitions. [2021-12-06 22:04:42,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 407 transitions, 2622 flow [2021-12-06 22:04:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 22:04:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-06 22:04:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3430 transitions. [2021-12-06 22:04:42,959 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.635891731553578 [2021-12-06 22:04:42,959 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3430 transitions. [2021-12-06 22:04:42,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3430 transitions. [2021-12-06 22:04:42,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:42,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3430 transitions. [2021-12-06 22:04:42,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 110.64516129032258) internal successors, (3430), 31 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:42,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:42,971 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:42,971 INFO L186 Difference]: Start difference. First operand has 238 places, 244 transitions, 1100 flow. Second operand 31 states and 3430 transitions. [2021-12-06 22:04:42,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 407 transitions, 2622 flow [2021-12-06 22:04:43,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 407 transitions, 2549 flow, removed 3 selfloop flow, removed 16 redundant places. [2021-12-06 22:04:43,038 INFO L242 Difference]: Finished difference. Result has 265 places, 274 transitions, 1630 flow [2021-12-06 22:04:43,039 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1630, PETRI_PLACES=265, PETRI_TRANSITIONS=274} [2021-12-06 22:04:43,039 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 110 predicate places. [2021-12-06 22:04:43,039 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 274 transitions, 1630 flow [2021-12-06 22:04:43,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:43,040 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:43,040 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:43,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:04:43,040 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:43,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1057355944, now seen corresponding path program 3 times [2021-12-06 22:04:43,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:43,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131472894] [2021-12-06 22:04:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:43,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:04:43,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:43,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131472894] [2021-12-06 22:04:43,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131472894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:43,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:43,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-06 22:04:43,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238205131] [2021-12-06 22:04:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:43,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:04:43,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:43,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:04:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:04:43,574 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:04:43,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 274 transitions, 1630 flow. Second operand has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:43,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:43,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:04:43,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:45,433 INFO L129 PetriNetUnfolder]: 3426/6750 cut-off events. [2021-12-06 22:04:45,433 INFO L130 PetriNetUnfolder]: For 21640/21664 co-relation queries the response was YES. [2021-12-06 22:04:45,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23015 conditions, 6750 events. 3426/6750 cut-off events. For 21640/21664 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 53336 event pairs, 451 based on Foata normal form. 48/6766 useless extension candidates. Maximal degree in co-relation 22965. Up to 1815 conditions per place. [2021-12-06 22:04:45,496 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 261 selfloop transitions, 135 changer transitions 4/490 dead transitions. [2021-12-06 22:04:45,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 490 transitions, 3675 flow [2021-12-06 22:04:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 22:04:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-06 22:04:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3855 transitions. [2021-12-06 22:04:45,506 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6154214559386973 [2021-12-06 22:04:45,506 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3855 transitions. [2021-12-06 22:04:45,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3855 transitions. [2021-12-06 22:04:45,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:45,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3855 transitions. [2021-12-06 22:04:45,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 107.08333333333333) internal successors, (3855), 36 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:45,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:45,518 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:45,518 INFO L186 Difference]: Start difference. First operand has 265 places, 274 transitions, 1630 flow. Second operand 36 states and 3855 transitions. [2021-12-06 22:04:45,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 490 transitions, 3675 flow [2021-12-06 22:04:45,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 490 transitions, 3491 flow, removed 76 selfloop flow, removed 17 redundant places. [2021-12-06 22:04:45,645 INFO L242 Difference]: Finished difference. Result has 291 places, 318 transitions, 2408 flow [2021-12-06 22:04:45,645 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2408, PETRI_PLACES=291, PETRI_TRANSITIONS=318} [2021-12-06 22:04:45,646 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 136 predicate places. [2021-12-06 22:04:45,646 INFO L470 AbstractCegarLoop]: Abstraction has has 291 places, 318 transitions, 2408 flow [2021-12-06 22:04:45,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:45,646 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:45,647 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:45,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:04:45,647 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:45,647 INFO L85 PathProgramCache]: Analyzing trace with hash 76181674, now seen corresponding path program 4 times [2021-12-06 22:04:45,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:45,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010296923] [2021-12-06 22:04:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:45,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:04:45,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:45,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010296923] [2021-12-06 22:04:45,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010296923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:45,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:45,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:04:45,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613814902] [2021-12-06 22:04:45,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:45,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:04:45,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:04:45,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:04:45,995 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:04:45,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 318 transitions, 2408 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:45,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:45,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:04:45,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:47,561 INFO L129 PetriNetUnfolder]: 3482/6917 cut-off events. [2021-12-06 22:04:47,561 INFO L130 PetriNetUnfolder]: For 28378/28402 co-relation queries the response was YES. [2021-12-06 22:04:47,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26014 conditions, 6917 events. 3482/6917 cut-off events. For 28378/28402 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 54825 event pairs, 1053 based on Foata normal form. 9/6876 useless extension candidates. Maximal degree in co-relation 25952. Up to 3925 conditions per place. [2021-12-06 22:04:47,654 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 212 selfloop transitions, 114 changer transitions 7/426 dead transitions. [2021-12-06 22:04:47,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 426 transitions, 3774 flow [2021-12-06 22:04:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:04:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 22:04:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3201 transitions. [2021-12-06 22:04:47,657 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6343638525564804 [2021-12-06 22:04:47,657 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3201 transitions. [2021-12-06 22:04:47,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3201 transitions. [2021-12-06 22:04:47,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:47,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3201 transitions. [2021-12-06 22:04:47,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.37931034482759) internal successors, (3201), 29 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:47,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:47,665 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:47,666 INFO L186 Difference]: Start difference. First operand has 291 places, 318 transitions, 2408 flow. Second operand 29 states and 3201 transitions. [2021-12-06 22:04:47,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 426 transitions, 3774 flow [2021-12-06 22:04:47,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 426 transitions, 3621 flow, removed 48 selfloop flow, removed 20 redundant places. [2021-12-06 22:04:47,792 INFO L242 Difference]: Finished difference. Result has 305 places, 333 transitions, 2756 flow [2021-12-06 22:04:47,793 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2756, PETRI_PLACES=305, PETRI_TRANSITIONS=333} [2021-12-06 22:04:47,793 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 150 predicate places. [2021-12-06 22:04:47,793 INFO L470 AbstractCegarLoop]: Abstraction has has 305 places, 333 transitions, 2756 flow [2021-12-06 22:04:47,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:47,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:47,794 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:47,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 22:04:47,794 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2070348602, now seen corresponding path program 5 times [2021-12-06 22:04:47,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:47,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348518731] [2021-12-06 22:04:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:47,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:04:48,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:48,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348518731] [2021-12-06 22:04:48,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348518731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:48,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:48,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:04:48,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397777969] [2021-12-06 22:04:48,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:48,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:04:48,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:48,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:04:48,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:04:48,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:04:48,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 333 transitions, 2756 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:48,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:48,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:04:48,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:49,662 INFO L129 PetriNetUnfolder]: 3518/6966 cut-off events. [2021-12-06 22:04:49,662 INFO L130 PetriNetUnfolder]: For 26245/26269 co-relation queries the response was YES. [2021-12-06 22:04:49,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26029 conditions, 6966 events. 3518/6966 cut-off events. For 26245/26269 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 55300 event pairs, 1283 based on Foata normal form. 19/6927 useless extension candidates. Maximal degree in co-relation 25964. Up to 3925 conditions per place. [2021-12-06 22:04:49,726 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 224 selfloop transitions, 113 changer transitions 3/433 dead transitions. [2021-12-06 22:04:49,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 433 transitions, 4150 flow [2021-12-06 22:04:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:04:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:04:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2899 transitions. [2021-12-06 22:04:49,730 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6408045977011494 [2021-12-06 22:04:49,730 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2899 transitions. [2021-12-06 22:04:49,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2899 transitions. [2021-12-06 22:04:49,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:49,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2899 transitions. [2021-12-06 22:04:49,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.5) internal successors, (2899), 26 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:49,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:49,739 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:49,739 INFO L186 Difference]: Start difference. First operand has 305 places, 333 transitions, 2756 flow. Second operand 26 states and 2899 transitions. [2021-12-06 22:04:49,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 433 transitions, 4150 flow [2021-12-06 22:04:49,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 433 transitions, 3957 flow, removed 23 selfloop flow, removed 22 redundant places. [2021-12-06 22:04:49,860 INFO L242 Difference]: Finished difference. Result has 312 places, 354 transitions, 3195 flow [2021-12-06 22:04:49,861 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3195, PETRI_PLACES=312, PETRI_TRANSITIONS=354} [2021-12-06 22:04:49,861 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 157 predicate places. [2021-12-06 22:04:49,861 INFO L470 AbstractCegarLoop]: Abstraction has has 312 places, 354 transitions, 3195 flow [2021-12-06 22:04:49,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:49,862 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:49,862 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:49,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:04:49,862 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:49,862 INFO L85 PathProgramCache]: Analyzing trace with hash 685562106, now seen corresponding path program 6 times [2021-12-06 22:04:49,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:49,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078762424] [2021-12-06 22:04:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:49,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:04:50,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:50,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078762424] [2021-12-06 22:04:50,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078762424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:50,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:50,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 22:04:50,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189213442] [2021-12-06 22:04:50,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:50,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:04:50,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:04:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:04:50,217 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:04:50,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 354 transitions, 3195 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:50,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:50,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:04:50,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:52,057 INFO L129 PetriNetUnfolder]: 3937/7743 cut-off events. [2021-12-06 22:04:52,057 INFO L130 PetriNetUnfolder]: For 32037/32073 co-relation queries the response was YES. [2021-12-06 22:04:52,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29297 conditions, 7743 events. 3937/7743 cut-off events. For 32037/32073 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 62195 event pairs, 1176 based on Foata normal form. 36/7726 useless extension candidates. Maximal degree in co-relation 29228. Up to 3949 conditions per place. [2021-12-06 22:04:52,122 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 283 selfloop transitions, 147 changer transitions 3/526 dead transitions. [2021-12-06 22:04:52,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 526 transitions, 5406 flow [2021-12-06 22:04:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 22:04:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-06 22:04:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3469 transitions. [2021-12-06 22:04:52,126 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6431219873934001 [2021-12-06 22:04:52,126 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3469 transitions. [2021-12-06 22:04:52,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3469 transitions. [2021-12-06 22:04:52,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:52,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3469 transitions. [2021-12-06 22:04:52,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 111.90322580645162) internal successors, (3469), 31 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:52,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:52,134 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:52,134 INFO L186 Difference]: Start difference. First operand has 312 places, 354 transitions, 3195 flow. Second operand 31 states and 3469 transitions. [2021-12-06 22:04:52,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 526 transitions, 5406 flow [2021-12-06 22:04:52,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 526 transitions, 5277 flow, removed 22 selfloop flow, removed 17 redundant places. [2021-12-06 22:04:52,278 INFO L242 Difference]: Finished difference. Result has 337 places, 395 transitions, 4108 flow [2021-12-06 22:04:52,278 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3076, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4108, PETRI_PLACES=337, PETRI_TRANSITIONS=395} [2021-12-06 22:04:52,278 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 182 predicate places. [2021-12-06 22:04:52,279 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 395 transitions, 4108 flow [2021-12-06 22:04:52,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:52,279 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:52,279 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:52,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 22:04:52,279 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1964616092, now seen corresponding path program 7 times [2021-12-06 22:04:52,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240454209] [2021-12-06 22:04:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:52,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:04:52,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:52,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240454209] [2021-12-06 22:04:52,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240454209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:52,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:52,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:04:52,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219412568] [2021-12-06 22:04:52,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:52,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:04:52,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:52,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:04:52,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:04:52,580 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:04:52,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 395 transitions, 4108 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:52,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:52,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:04:52,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:04:54,531 INFO L129 PetriNetUnfolder]: 3948/7764 cut-off events. [2021-12-06 22:04:54,531 INFO L130 PetriNetUnfolder]: For 37545/37581 co-relation queries the response was YES. [2021-12-06 22:04:54,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31273 conditions, 7764 events. 3948/7764 cut-off events. For 37545/37581 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 62711 event pairs, 1328 based on Foata normal form. 16/7719 useless extension candidates. Maximal degree in co-relation 31192. Up to 4439 conditions per place. [2021-12-06 22:04:54,618 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 243 selfloop transitions, 140 changer transitions 7/483 dead transitions. [2021-12-06 22:04:54,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 483 transitions, 5564 flow [2021-12-06 22:04:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:04:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 22:04:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3209 transitions. [2021-12-06 22:04:54,622 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6359492667459373 [2021-12-06 22:04:54,622 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3209 transitions. [2021-12-06 22:04:54,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3209 transitions. [2021-12-06 22:04:54,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:04:54,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3209 transitions. [2021-12-06 22:04:54,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.65517241379311) internal successors, (3209), 29 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:54,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:54,632 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:54,632 INFO L186 Difference]: Start difference. First operand has 337 places, 395 transitions, 4108 flow. Second operand 29 states and 3209 transitions. [2021-12-06 22:04:54,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 483 transitions, 5564 flow [2021-12-06 22:04:54,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 483 transitions, 5388 flow, removed 32 selfloop flow, removed 16 redundant places. [2021-12-06 22:04:54,840 INFO L242 Difference]: Finished difference. Result has 357 places, 407 transitions, 4538 flow [2021-12-06 22:04:54,841 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3945, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4538, PETRI_PLACES=357, PETRI_TRANSITIONS=407} [2021-12-06 22:04:54,841 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 202 predicate places. [2021-12-06 22:04:54,841 INFO L470 AbstractCegarLoop]: Abstraction has has 357 places, 407 transitions, 4538 flow [2021-12-06 22:04:54,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:54,842 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:04:54,842 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:54,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 22:04:54,842 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:04:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1821375558, now seen corresponding path program 8 times [2021-12-06 22:04:54,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:54,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073499830] [2021-12-06 22:04:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:54,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:04:55,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:55,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073499830] [2021-12-06 22:04:55,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073499830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:04:55,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822059793] [2021-12-06 22:04:55,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:04:55,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:04:55,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:04:55,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:04:55,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:04:55,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:04:55,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:04:55,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 22:04:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:04:56,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:04:56,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:04:56,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:04:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:04:56,665 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 22:04:56,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2021-12-06 22:04:56,769 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 22:04:56,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-06 22:04:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:04:56,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:04:57,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:04:57,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 70 [2021-12-06 22:04:57,385 INFO L354 Elim1Store]: treesize reduction 39, result has 64.2 percent of original size [2021-12-06 22:04:57,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 924 treesize of output 833 [2021-12-06 22:04:57,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:04:57,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 694 treesize of output 518 [2021-12-06 22:04:57,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:04:57,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 572 treesize of output 548 [2021-12-06 22:04:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:04:58,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822059793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:04:58,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:04:58,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 23] total 61 [2021-12-06 22:04:58,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291574480] [2021-12-06 22:04:58,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:04:58,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 22:04:58,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:58,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 22:04:58,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=3301, Unknown=35, NotChecked=0, Total=3660 [2021-12-06 22:04:58,644 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2021-12-06 22:04:58,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 407 transitions, 4538 flow. Second operand has 61 states, 61 states have (on average 86.75409836065573) internal successors, (5292), 61 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:58,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:04:58,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2021-12-06 22:04:58,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:04,104 INFO L129 PetriNetUnfolder]: 5902/11396 cut-off events. [2021-12-06 22:05:04,105 INFO L130 PetriNetUnfolder]: For 61755/61791 co-relation queries the response was YES. [2021-12-06 22:05:04,196 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48005 conditions, 11396 events. 5902/11396 cut-off events. For 61755/61791 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 98113 event pairs, 578 based on Foata normal form. 45/11405 useless extension candidates. Maximal degree in co-relation 47915. Up to 2974 conditions per place. [2021-12-06 22:05:04,239 INFO L132 encePairwiseOnDemand]: 134/174 looper letters, 501 selfloop transitions, 317 changer transitions 4/895 dead transitions. [2021-12-06 22:05:04,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 895 transitions, 11018 flow [2021-12-06 22:05:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 22:05:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-06 22:05:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4201 transitions. [2021-12-06 22:05:04,245 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5365261813537675 [2021-12-06 22:05:04,245 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4201 transitions. [2021-12-06 22:05:04,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4201 transitions. [2021-12-06 22:05:04,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:04,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4201 transitions. [2021-12-06 22:05:04,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 93.35555555555555) internal successors, (4201), 45 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:04,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 174.0) internal successors, (8004), 46 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:04,259 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 174.0) internal successors, (8004), 46 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:04,259 INFO L186 Difference]: Start difference. First operand has 357 places, 407 transitions, 4538 flow. Second operand 45 states and 4201 transitions. [2021-12-06 22:05:04,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 895 transitions, 11018 flow [2021-12-06 22:05:04,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 895 transitions, 10641 flow, removed 53 selfloop flow, removed 20 redundant places. [2021-12-06 22:05:04,718 INFO L242 Difference]: Finished difference. Result has 398 places, 587 transitions, 8216 flow [2021-12-06 22:05:04,718 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4292, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=8216, PETRI_PLACES=398, PETRI_TRANSITIONS=587} [2021-12-06 22:05:04,718 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 243 predicate places. [2021-12-06 22:05:04,719 INFO L470 AbstractCegarLoop]: Abstraction has has 398 places, 587 transitions, 8216 flow [2021-12-06 22:05:04,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 86.75409836065573) internal successors, (5292), 61 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:04,719 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:04,719 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:04,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:05:04,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 22:05:04,921 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash -420338678, now seen corresponding path program 9 times [2021-12-06 22:05:04,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:04,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541829270] [2021-12-06 22:05:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:04,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:05,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:05,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541829270] [2021-12-06 22:05:05,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541829270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:05,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:05,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 22:05:05,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145679240] [2021-12-06 22:05:05,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:05,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:05:05,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:05,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:05:05,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:05:05,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:05:05,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 587 transitions, 8216 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:05,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:05,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:05:05,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:08,616 INFO L129 PetriNetUnfolder]: 6116/11846 cut-off events. [2021-12-06 22:05:08,617 INFO L130 PetriNetUnfolder]: For 88073/88276 co-relation queries the response was YES. [2021-12-06 22:05:08,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58488 conditions, 11846 events. 6116/11846 cut-off events. For 88073/88276 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 103026 event pairs, 1549 based on Foata normal form. 98/11875 useless extension candidates. Maximal degree in co-relation 58382. Up to 6532 conditions per place. [2021-12-06 22:05:08,753 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 320 selfloop transitions, 280 changer transitions 4/697 dead transitions. [2021-12-06 22:05:08,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 697 transitions, 10343 flow [2021-12-06 22:05:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:05:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:05:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3019 transitions. [2021-12-06 22:05:08,756 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6426138782460622 [2021-12-06 22:05:08,757 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3019 transitions. [2021-12-06 22:05:08,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3019 transitions. [2021-12-06 22:05:08,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:08,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3019 transitions. [2021-12-06 22:05:08,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.81481481481481) internal successors, (3019), 27 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:08,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:08,763 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:08,763 INFO L186 Difference]: Start difference. First operand has 398 places, 587 transitions, 8216 flow. Second operand 27 states and 3019 transitions. [2021-12-06 22:05:08,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 697 transitions, 10343 flow [2021-12-06 22:05:09,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 697 transitions, 10160 flow, removed 22 selfloop flow, removed 21 redundant places. [2021-12-06 22:05:09,422 INFO L242 Difference]: Finished difference. Result has 408 places, 601 transitions, 9130 flow [2021-12-06 22:05:09,422 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7924, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=9130, PETRI_PLACES=408, PETRI_TRANSITIONS=601} [2021-12-06 22:05:09,422 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 253 predicate places. [2021-12-06 22:05:09,422 INFO L470 AbstractCegarLoop]: Abstraction has has 408 places, 601 transitions, 9130 flow [2021-12-06 22:05:09,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:09,423 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:09,423 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:09,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 22:05:09,423 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:09,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1532927742, now seen corresponding path program 1 times [2021-12-06 22:05:09,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:09,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016289049] [2021-12-06 22:05:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:09,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:09,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:09,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016289049] [2021-12-06 22:05:09,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016289049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:09,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:09,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:05:09,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885117683] [2021-12-06 22:05:09,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:09,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:05:09,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:09,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:05:09,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:05:09,732 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:05:09,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 601 transitions, 9130 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:09,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:09,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:05:09,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:13,383 INFO L129 PetriNetUnfolder]: 6209/12074 cut-off events. [2021-12-06 22:05:13,383 INFO L130 PetriNetUnfolder]: For 95198/95405 co-relation queries the response was YES. [2021-12-06 22:05:13,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61670 conditions, 12074 events. 6209/12074 cut-off events. For 95198/95405 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 105904 event pairs, 1536 based on Foata normal form. 34/12036 useless extension candidates. Maximal degree in co-relation 61558. Up to 7172 conditions per place. [2021-12-06 22:05:13,538 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 399 selfloop transitions, 193 changer transitions 41/726 dead transitions. [2021-12-06 22:05:13,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 726 transitions, 11571 flow [2021-12-06 22:05:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 22:05:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-06 22:05:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3335 transitions. [2021-12-06 22:05:13,541 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2021-12-06 22:05:13,542 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3335 transitions. [2021-12-06 22:05:13,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3335 transitions. [2021-12-06 22:05:13,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:13,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3335 transitions. [2021-12-06 22:05:13,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 111.16666666666667) internal successors, (3335), 30 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:13,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:13,548 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:13,548 INFO L186 Difference]: Start difference. First operand has 408 places, 601 transitions, 9130 flow. Second operand 30 states and 3335 transitions. [2021-12-06 22:05:13,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 726 transitions, 11571 flow [2021-12-06 22:05:14,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 726 transitions, 11394 flow, removed 6 selfloop flow, removed 19 redundant places. [2021-12-06 22:05:14,288 INFO L242 Difference]: Finished difference. Result has 422 places, 607 transitions, 9505 flow [2021-12-06 22:05:14,289 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8958, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9505, PETRI_PLACES=422, PETRI_TRANSITIONS=607} [2021-12-06 22:05:14,289 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 267 predicate places. [2021-12-06 22:05:14,289 INFO L470 AbstractCegarLoop]: Abstraction has has 422 places, 607 transitions, 9505 flow [2021-12-06 22:05:14,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:14,290 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:14,290 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:14,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 22:05:14,290 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2019158248, now seen corresponding path program 2 times [2021-12-06 22:05:14,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:14,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519242242] [2021-12-06 22:05:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:14,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:14,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:14,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519242242] [2021-12-06 22:05:14,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519242242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:14,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:14,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 22:05:14,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728065184] [2021-12-06 22:05:14,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:14,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:05:14,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:14,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:05:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:05:14,572 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:05:14,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 607 transitions, 9505 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:14,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:14,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:05:14,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:18,277 INFO L129 PetriNetUnfolder]: 6310/12169 cut-off events. [2021-12-06 22:05:18,277 INFO L130 PetriNetUnfolder]: For 103168/103365 co-relation queries the response was YES. [2021-12-06 22:05:18,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62818 conditions, 12169 events. 6310/12169 cut-off events. For 103168/103365 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 105954 event pairs, 1206 based on Foata normal form. 53/12154 useless extension candidates. Maximal degree in co-relation 62702. Up to 7172 conditions per place. [2021-12-06 22:05:18,459 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 377 selfloop transitions, 341 changer transitions 4/815 dead transitions. [2021-12-06 22:05:18,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 815 transitions, 13371 flow [2021-12-06 22:05:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 22:05:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-06 22:05:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3893 transitions. [2021-12-06 22:05:18,463 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392446633825944 [2021-12-06 22:05:18,463 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3893 transitions. [2021-12-06 22:05:18,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3893 transitions. [2021-12-06 22:05:18,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:18,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3893 transitions. [2021-12-06 22:05:18,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 111.22857142857143) internal successors, (3893), 35 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:18,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:18,472 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:18,472 INFO L186 Difference]: Start difference. First operand has 422 places, 607 transitions, 9505 flow. Second operand 35 states and 3893 transitions. [2021-12-06 22:05:18,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 815 transitions, 13371 flow [2021-12-06 22:05:19,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 815 transitions, 13036 flow, removed 67 selfloop flow, removed 23 redundant places. [2021-12-06 22:05:19,263 INFO L242 Difference]: Finished difference. Result has 437 places, 670 transitions, 11456 flow [2021-12-06 22:05:19,264 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=9260, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11456, PETRI_PLACES=437, PETRI_TRANSITIONS=670} [2021-12-06 22:05:19,264 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 282 predicate places. [2021-12-06 22:05:19,264 INFO L470 AbstractCegarLoop]: Abstraction has has 437 places, 670 transitions, 11456 flow [2021-12-06 22:05:19,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:19,265 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:19,265 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:19,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 22:05:19,265 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -691411096, now seen corresponding path program 3 times [2021-12-06 22:05:19,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:19,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930904588] [2021-12-06 22:05:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:19,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:19,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:19,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930904588] [2021-12-06 22:05:19,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930904588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:19,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:19,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:05:19,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650472129] [2021-12-06 22:05:19,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:19,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:05:19,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:05:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:05:19,783 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2021-12-06 22:05:19,784 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 670 transitions, 11456 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:19,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:19,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2021-12-06 22:05:19,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:23,805 INFO L129 PetriNetUnfolder]: 6318/12233 cut-off events. [2021-12-06 22:05:23,805 INFO L130 PetriNetUnfolder]: For 111314/111502 co-relation queries the response was YES. [2021-12-06 22:05:23,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64724 conditions, 12233 events. 6318/12233 cut-off events. For 111314/111502 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 107229 event pairs, 1514 based on Foata normal form. 40/12210 useless extension candidates. Maximal degree in co-relation 64604. Up to 7176 conditions per place. [2021-12-06 22:05:23,965 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 401 selfloop transitions, 251 changer transitions 38/777 dead transitions. [2021-12-06 22:05:23,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 777 transitions, 13817 flow [2021-12-06 22:05:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 22:05:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-06 22:05:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3152 transitions. [2021-12-06 22:05:23,968 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5843529847979236 [2021-12-06 22:05:23,968 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3152 transitions. [2021-12-06 22:05:23,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3152 transitions. [2021-12-06 22:05:23,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:23,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3152 transitions. [2021-12-06 22:05:23,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 101.6774193548387) internal successors, (3152), 31 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:23,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:23,973 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:23,973 INFO L186 Difference]: Start difference. First operand has 437 places, 670 transitions, 11456 flow. Second operand 31 states and 3152 transitions. [2021-12-06 22:05:23,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 777 transitions, 13817 flow [2021-12-06 22:05:24,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 777 transitions, 13355 flow, removed 134 selfloop flow, removed 19 redundant places. [2021-12-06 22:05:24,813 INFO L242 Difference]: Finished difference. Result has 453 places, 669 transitions, 11559 flow [2021-12-06 22:05:24,813 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=10975, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=11559, PETRI_PLACES=453, PETRI_TRANSITIONS=669} [2021-12-06 22:05:24,814 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 298 predicate places. [2021-12-06 22:05:24,814 INFO L470 AbstractCegarLoop]: Abstraction has has 453 places, 669 transitions, 11559 flow [2021-12-06 22:05:24,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:24,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:24,814 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:24,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 22:05:24,814 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:24,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1868777240, now seen corresponding path program 4 times [2021-12-06 22:05:24,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:24,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347584109] [2021-12-06 22:05:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:24,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:25,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:25,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347584109] [2021-12-06 22:05:25,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347584109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:25,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:25,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 22:05:25,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967671928] [2021-12-06 22:05:25,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:25,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:05:25,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:25,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:05:25,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:05:25,157 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:05:25,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 669 transitions, 11559 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:25,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:25,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:05:25,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:28,898 INFO L129 PetriNetUnfolder]: 6286/12102 cut-off events. [2021-12-06 22:05:28,898 INFO L130 PetriNetUnfolder]: For 98844/99030 co-relation queries the response was YES. [2021-12-06 22:05:29,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63109 conditions, 12102 events. 6286/12102 cut-off events. For 98844/99030 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 105467 event pairs, 1657 based on Foata normal form. 65/12095 useless extension candidates. Maximal degree in co-relation 62985. Up to 7172 conditions per place. [2021-12-06 22:05:29,061 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 404 selfloop transitions, 254 changer transitions 1/752 dead transitions. [2021-12-06 22:05:29,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 752 transitions, 13410 flow [2021-12-06 22:05:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:05:29,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:05:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3020 transitions. [2021-12-06 22:05:29,063 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6428267347807578 [2021-12-06 22:05:29,064 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3020 transitions. [2021-12-06 22:05:29,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3020 transitions. [2021-12-06 22:05:29,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:29,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3020 transitions. [2021-12-06 22:05:29,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.85185185185185) internal successors, (3020), 27 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:29,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:29,069 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:29,069 INFO L186 Difference]: Start difference. First operand has 453 places, 669 transitions, 11559 flow. Second operand 27 states and 3020 transitions. [2021-12-06 22:05:29,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 752 transitions, 13410 flow [2021-12-06 22:05:29,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 752 transitions, 12888 flow, removed 24 selfloop flow, removed 27 redundant places. [2021-12-06 22:05:29,842 INFO L242 Difference]: Finished difference. Result has 451 places, 671 transitions, 11719 flow [2021-12-06 22:05:29,842 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=10923, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11719, PETRI_PLACES=451, PETRI_TRANSITIONS=671} [2021-12-06 22:05:29,842 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 296 predicate places. [2021-12-06 22:05:29,843 INFO L470 AbstractCegarLoop]: Abstraction has has 451 places, 671 transitions, 11719 flow [2021-12-06 22:05:29,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:29,843 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:29,843 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:29,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 22:05:29,843 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash 972632, now seen corresponding path program 5 times [2021-12-06 22:05:29,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:29,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341951395] [2021-12-06 22:05:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:29,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:30,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:30,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341951395] [2021-12-06 22:05:30,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341951395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:30,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:30,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:05:30,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107631266] [2021-12-06 22:05:30,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:30,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:05:30,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:05:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:05:30,235 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:05:30,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 671 transitions, 11719 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:30,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:30,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:05:30,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:34,030 INFO L129 PetriNetUnfolder]: 6331/12167 cut-off events. [2021-12-06 22:05:34,030 INFO L130 PetriNetUnfolder]: For 103720/103899 co-relation queries the response was YES. [2021-12-06 22:05:34,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64170 conditions, 12167 events. 6331/12167 cut-off events. For 103720/103899 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 105857 event pairs, 1595 based on Foata normal form. 45/12147 useless extension candidates. Maximal degree in co-relation 64049. Up to 7173 conditions per place. [2021-12-06 22:05:34,210 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 378 selfloop transitions, 292 changer transitions 1/761 dead transitions. [2021-12-06 22:05:34,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 761 transitions, 14000 flow [2021-12-06 22:05:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:05:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:05:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2761 transitions. [2021-12-06 22:05:34,213 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6103006189213086 [2021-12-06 22:05:34,214 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2761 transitions. [2021-12-06 22:05:34,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2761 transitions. [2021-12-06 22:05:34,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:34,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2761 transitions. [2021-12-06 22:05:34,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 106.1923076923077) internal successors, (2761), 26 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:34,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:34,220 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:34,220 INFO L186 Difference]: Start difference. First operand has 451 places, 671 transitions, 11719 flow. Second operand 26 states and 2761 transitions. [2021-12-06 22:05:34,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 761 transitions, 14000 flow [2021-12-06 22:05:35,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 761 transitions, 13696 flow, removed 29 selfloop flow, removed 19 redundant places. [2021-12-06 22:05:35,140 INFO L242 Difference]: Finished difference. Result has 463 places, 696 transitions, 12770 flow [2021-12-06 22:05:35,141 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=11429, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12770, PETRI_PLACES=463, PETRI_TRANSITIONS=696} [2021-12-06 22:05:35,141 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 308 predicate places. [2021-12-06 22:05:35,141 INFO L470 AbstractCegarLoop]: Abstraction has has 463 places, 696 transitions, 12770 flow [2021-12-06 22:05:35,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:35,142 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:35,142 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:35,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 22:05:35,142 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:35,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1354667942, now seen corresponding path program 6 times [2021-12-06 22:05:35,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:35,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343524337] [2021-12-06 22:05:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:35,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:35,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:35,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343524337] [2021-12-06 22:05:35,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343524337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:35,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:35,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:05:35,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045361349] [2021-12-06 22:05:35,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:35,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:05:35,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:05:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:05:35,427 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:05:35,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 696 transitions, 12770 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:35,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:35,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:05:35,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:39,097 INFO L129 PetriNetUnfolder]: 6345/12252 cut-off events. [2021-12-06 22:05:39,098 INFO L130 PetriNetUnfolder]: For 110772/110959 co-relation queries the response was YES. [2021-12-06 22:05:39,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65314 conditions, 12252 events. 6345/12252 cut-off events. For 110772/110959 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 107297 event pairs, 1655 based on Foata normal form. 27/12204 useless extension candidates. Maximal degree in co-relation 65190. Up to 7172 conditions per place. [2021-12-06 22:05:39,268 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 448 selfloop transitions, 217 changer transitions 13/771 dead transitions. [2021-12-06 22:05:39,268 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 771 transitions, 14754 flow [2021-12-06 22:05:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:05:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-06 22:05:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3097 transitions. [2021-12-06 22:05:39,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6356732348111659 [2021-12-06 22:05:39,271 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3097 transitions. [2021-12-06 22:05:39,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3097 transitions. [2021-12-06 22:05:39,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:39,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3097 transitions. [2021-12-06 22:05:39,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 110.60714285714286) internal successors, (3097), 28 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:39,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:39,276 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:39,276 INFO L186 Difference]: Start difference. First operand has 463 places, 696 transitions, 12770 flow. Second operand 28 states and 3097 transitions. [2021-12-06 22:05:39,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 771 transitions, 14754 flow [2021-12-06 22:05:40,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 771 transitions, 14426 flow, removed 7 selfloop flow, removed 19 redundant places. [2021-12-06 22:05:40,151 INFO L242 Difference]: Finished difference. Result has 473 places, 693 transitions, 12813 flow [2021-12-06 22:05:40,152 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12444, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12813, PETRI_PLACES=473, PETRI_TRANSITIONS=693} [2021-12-06 22:05:40,152 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 318 predicate places. [2021-12-06 22:05:40,153 INFO L470 AbstractCegarLoop]: Abstraction has has 473 places, 693 transitions, 12813 flow [2021-12-06 22:05:40,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:40,153 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:40,153 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:40,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 22:05:40,153 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1675604162, now seen corresponding path program 10 times [2021-12-06 22:05:40,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:40,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493171319] [2021-12-06 22:05:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:40,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:40,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:40,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493171319] [2021-12-06 22:05:40,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493171319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:40,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:40,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 22:05:40,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63940805] [2021-12-06 22:05:40,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:40,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:05:40,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:40,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:05:40,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:05:40,513 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:05:40,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 693 transitions, 12813 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:40,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:40,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:05:40,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:44,315 INFO L129 PetriNetUnfolder]: 6431/12432 cut-off events. [2021-12-06 22:05:44,315 INFO L130 PetriNetUnfolder]: For 117932/118115 co-relation queries the response was YES. [2021-12-06 22:05:44,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66427 conditions, 12432 events. 6431/12432 cut-off events. For 117932/118115 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 109408 event pairs, 1584 based on Foata normal form. 94/12457 useless extension candidates. Maximal degree in co-relation 66301. Up to 6310 conditions per place. [2021-12-06 22:05:44,483 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 406 selfloop transitions, 326 changer transitions 0/825 dead transitions. [2021-12-06 22:05:44,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 825 transitions, 15245 flow [2021-12-06 22:05:44,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 22:05:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-06 22:05:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3580 transitions. [2021-12-06 22:05:44,486 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6429597701149425 [2021-12-06 22:05:44,486 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3580 transitions. [2021-12-06 22:05:44,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3580 transitions. [2021-12-06 22:05:44,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:44,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3580 transitions. [2021-12-06 22:05:44,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 111.875) internal successors, (3580), 32 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:44,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:44,495 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:44,495 INFO L186 Difference]: Start difference. First operand has 473 places, 693 transitions, 12813 flow. Second operand 32 states and 3580 transitions. [2021-12-06 22:05:44,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 825 transitions, 15245 flow [2021-12-06 22:05:45,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 825 transitions, 14978 flow, removed 12 selfloop flow, removed 26 redundant places. [2021-12-06 22:05:45,424 INFO L242 Difference]: Finished difference. Result has 480 places, 704 transitions, 13637 flow [2021-12-06 22:05:45,424 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12522, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=13637, PETRI_PLACES=480, PETRI_TRANSITIONS=704} [2021-12-06 22:05:45,425 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 325 predicate places. [2021-12-06 22:05:45,425 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 704 transitions, 13637 flow [2021-12-06 22:05:45,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:45,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:45,425 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:45,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 22:05:45,426 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:45,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:45,426 INFO L85 PathProgramCache]: Analyzing trace with hash -896028936, now seen corresponding path program 11 times [2021-12-06 22:05:45,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:45,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503730038] [2021-12-06 22:05:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:45,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:45,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:45,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503730038] [2021-12-06 22:05:45,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503730038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:45,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:45,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:05:45,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931298772] [2021-12-06 22:05:45,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:45,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:05:45,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:45,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:05:45,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:05:45,854 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:05:45,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 704 transitions, 13637 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:45,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:45,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:05:45,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:50,097 INFO L129 PetriNetUnfolder]: 6385/12346 cut-off events. [2021-12-06 22:05:50,098 INFO L130 PetriNetUnfolder]: For 128983/129158 co-relation queries the response was YES. [2021-12-06 22:05:50,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67871 conditions, 12346 events. 6385/12346 cut-off events. For 128983/129158 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 108609 event pairs, 1626 based on Foata normal form. 41/12320 useless extension candidates. Maximal degree in co-relation 67743. Up to 7353 conditions per place. [2021-12-06 22:05:50,265 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 401 selfloop transitions, 258 changer transitions 5/754 dead transitions. [2021-12-06 22:05:50,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 754 transitions, 15129 flow [2021-12-06 22:05:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:05:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:05:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2751 transitions. [2021-12-06 22:05:50,268 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6080901856763926 [2021-12-06 22:05:50,268 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2751 transitions. [2021-12-06 22:05:50,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2751 transitions. [2021-12-06 22:05:50,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:50,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2751 transitions. [2021-12-06 22:05:50,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 105.8076923076923) internal successors, (2751), 26 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:50,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:50,272 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:50,273 INFO L186 Difference]: Start difference. First operand has 480 places, 704 transitions, 13637 flow. Second operand 26 states and 2751 transitions. [2021-12-06 22:05:50,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 754 transitions, 15129 flow [2021-12-06 22:05:51,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 754 transitions, 14713 flow, removed 24 selfloop flow, removed 23 redundant places. [2021-12-06 22:05:51,201 INFO L242 Difference]: Finished difference. Result has 485 places, 692 transitions, 13520 flow [2021-12-06 22:05:51,201 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12911, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13520, PETRI_PLACES=485, PETRI_TRANSITIONS=692} [2021-12-06 22:05:51,201 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 330 predicate places. [2021-12-06 22:05:51,202 INFO L470 AbstractCegarLoop]: Abstraction has has 485 places, 692 transitions, 13520 flow [2021-12-06 22:05:51,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:51,202 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:51,202 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:51,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 22:05:51,202 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash 867412328, now seen corresponding path program 7 times [2021-12-06 22:05:51,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:51,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050616891] [2021-12-06 22:05:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:51,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:51,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:51,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050616891] [2021-12-06 22:05:51,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050616891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:51,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:51,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:05:51,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919485952] [2021-12-06 22:05:51,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:51,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:05:51,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:51,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:05:51,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:05:51,453 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:05:51,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 692 transitions, 13520 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:51,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:51,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:05:51,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:05:55,200 INFO L129 PetriNetUnfolder]: 6367/12318 cut-off events. [2021-12-06 22:05:55,200 INFO L130 PetriNetUnfolder]: For 130854/131041 co-relation queries the response was YES. [2021-12-06 22:05:55,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67174 conditions, 12318 events. 6367/12318 cut-off events. For 130854/131041 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 108405 event pairs, 1649 based on Foata normal form. 27/12268 useless extension candidates. Maximal degree in co-relation 67045. Up to 7352 conditions per place. [2021-12-06 22:05:55,368 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 438 selfloop transitions, 215 changer transitions 8/754 dead transitions. [2021-12-06 22:05:55,368 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 754 transitions, 15250 flow [2021-12-06 22:05:55,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:05:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:05:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2881 transitions. [2021-12-06 22:05:55,370 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6368258178603006 [2021-12-06 22:05:55,370 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2881 transitions. [2021-12-06 22:05:55,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2881 transitions. [2021-12-06 22:05:55,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:05:55,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2881 transitions. [2021-12-06 22:05:55,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 110.8076923076923) internal successors, (2881), 26 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:55,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:55,374 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:55,374 INFO L186 Difference]: Start difference. First operand has 485 places, 692 transitions, 13520 flow. Second operand 26 states and 2881 transitions. [2021-12-06 22:05:55,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 754 transitions, 15250 flow [2021-12-06 22:05:56,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 754 transitions, 14888 flow, removed 6 selfloop flow, removed 22 redundant places. [2021-12-06 22:05:56,264 INFO L242 Difference]: Finished difference. Result has 489 places, 688 transitions, 13480 flow [2021-12-06 22:05:56,265 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=13125, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13480, PETRI_PLACES=489, PETRI_TRANSITIONS=688} [2021-12-06 22:05:56,266 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 334 predicate places. [2021-12-06 22:05:56,266 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 688 transitions, 13480 flow [2021-12-06 22:05:56,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:56,266 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:05:56,266 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:56,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 22:05:56,266 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:05:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:56,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1184602896, now seen corresponding path program 12 times [2021-12-06 22:05:56,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:56,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892138320] [2021-12-06 22:05:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:56,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:05:56,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:56,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892138320] [2021-12-06 22:05:56,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892138320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:56,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:56,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-06 22:05:56,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570216369] [2021-12-06 22:05:56,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:56,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:05:56,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:56,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:05:56,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:05:56,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:05:56,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 688 transitions, 13480 flow. Second operand has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:56,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:05:56,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:05:56,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:06:01,103 INFO L129 PetriNetUnfolder]: 6735/12978 cut-off events. [2021-12-06 22:06:01,103 INFO L130 PetriNetUnfolder]: For 142527/142699 co-relation queries the response was YES. [2021-12-06 22:06:01,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70910 conditions, 12978 events. 6735/12978 cut-off events. For 142527/142699 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 115047 event pairs, 1460 based on Foata normal form. 100/13015 useless extension candidates. Maximal degree in co-relation 70783. Up to 6145 conditions per place. [2021-12-06 22:06:01,283 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 374 selfloop transitions, 384 changer transitions 0/848 dead transitions. [2021-12-06 22:06:01,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 848 transitions, 16468 flow [2021-12-06 22:06:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 22:06:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-06 22:06:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3516 transitions. [2021-12-06 22:06:01,316 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6123301985370951 [2021-12-06 22:06:01,316 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3516 transitions. [2021-12-06 22:06:01,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3516 transitions. [2021-12-06 22:06:01,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:06:01,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3516 transitions. [2021-12-06 22:06:01,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 106.54545454545455) internal successors, (3516), 33 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:01,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:01,322 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:01,322 INFO L186 Difference]: Start difference. First operand has 489 places, 688 transitions, 13480 flow. Second operand 33 states and 3516 transitions. [2021-12-06 22:06:01,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 848 transitions, 16468 flow [2021-12-06 22:06:02,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 848 transitions, 15797 flow, removed 8 selfloop flow, removed 29 redundant places. [2021-12-06 22:06:02,273 INFO L242 Difference]: Finished difference. Result has 494 places, 716 transitions, 14352 flow [2021-12-06 22:06:02,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12835, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=14352, PETRI_PLACES=494, PETRI_TRANSITIONS=716} [2021-12-06 22:06:02,274 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 339 predicate places. [2021-12-06 22:06:02,274 INFO L470 AbstractCegarLoop]: Abstraction has has 494 places, 716 transitions, 14352 flow [2021-12-06 22:06:02,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:02,274 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:06:02,275 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:02,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 22:06:02,275 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:06:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2012998820, now seen corresponding path program 13 times [2021-12-06 22:06:02,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:02,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620339661] [2021-12-06 22:06:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:02,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:06:02,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:02,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620339661] [2021-12-06 22:06:02,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620339661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:06:02,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:06:02,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:06:02,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624249706] [2021-12-06 22:06:02,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:06:02,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:06:02,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:06:02,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:06:02,689 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:06:02,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 716 transitions, 14352 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:02,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:06:02,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:06:02,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:06:06,891 INFO L129 PetriNetUnfolder]: 6693/12907 cut-off events. [2021-12-06 22:06:06,891 INFO L130 PetriNetUnfolder]: For 145290/145465 co-relation queries the response was YES. [2021-12-06 22:06:07,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72596 conditions, 12907 events. 6693/12907 cut-off events. For 145290/145465 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 114369 event pairs, 1645 based on Foata normal form. 33/12862 useless extension candidates. Maximal degree in co-relation 72466. Up to 7861 conditions per place. [2021-12-06 22:06:07,118 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 347 selfloop transitions, 333 changer transitions 0/770 dead transitions. [2021-12-06 22:06:07,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 770 transitions, 15954 flow [2021-12-06 22:06:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:06:07,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:06:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2854 transitions. [2021-12-06 22:06:07,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6074925500212857 [2021-12-06 22:06:07,120 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2854 transitions. [2021-12-06 22:06:07,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2854 transitions. [2021-12-06 22:06:07,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:06:07,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2854 transitions. [2021-12-06 22:06:07,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 105.70370370370371) internal successors, (2854), 27 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:07,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:07,128 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:07,128 INFO L186 Difference]: Start difference. First operand has 494 places, 716 transitions, 14352 flow. Second operand 27 states and 2854 transitions. [2021-12-06 22:06:07,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 770 transitions, 15954 flow [2021-12-06 22:06:08,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 770 transitions, 15472 flow, removed 25 selfloop flow, removed 23 redundant places. [2021-12-06 22:06:08,247 INFO L242 Difference]: Finished difference. Result has 498 places, 712 transitions, 14490 flow [2021-12-06 22:06:08,248 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=13751, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14490, PETRI_PLACES=498, PETRI_TRANSITIONS=712} [2021-12-06 22:06:08,248 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 343 predicate places. [2021-12-06 22:06:08,248 INFO L470 AbstractCegarLoop]: Abstraction has has 498 places, 712 transitions, 14490 flow [2021-12-06 22:06:08,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:08,248 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:06:08,248 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:08,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 22:06:08,249 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:06:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:08,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1943371286, now seen corresponding path program 8 times [2021-12-06 22:06:08,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:08,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642750416] [2021-12-06 22:06:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:08,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:06:08,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:08,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642750416] [2021-12-06 22:06:08,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642750416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:06:08,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:06:08,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:06:08,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170239618] [2021-12-06 22:06:08,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:06:08,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:06:08,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:06:08,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:06:08,723 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2021-12-06 22:06:08,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 712 transitions, 14490 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:08,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:06:08,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2021-12-06 22:06:08,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:06:13,123 INFO L129 PetriNetUnfolder]: 6713/12967 cut-off events. [2021-12-06 22:06:13,123 INFO L130 PetriNetUnfolder]: For 149870/150045 co-relation queries the response was YES. [2021-12-06 22:06:13,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72386 conditions, 12967 events. 6713/12967 cut-off events. For 149870/150045 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 115027 event pairs, 1708 based on Foata normal form. 27/12913 useless extension candidates. Maximal degree in co-relation 72257. Up to 7864 conditions per place. [2021-12-06 22:06:13,312 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 429 selfloop transitions, 255 changer transitions 13/784 dead transitions. [2021-12-06 22:06:13,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 784 transitions, 16494 flow [2021-12-06 22:06:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:06:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 22:06:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2938 transitions. [2021-12-06 22:06:13,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5822433610780816 [2021-12-06 22:06:13,315 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2938 transitions. [2021-12-06 22:06:13,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2938 transitions. [2021-12-06 22:06:13,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:06:13,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2938 transitions. [2021-12-06 22:06:13,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 101.3103448275862) internal successors, (2938), 29 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:13,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:13,320 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:13,320 INFO L186 Difference]: Start difference. First operand has 498 places, 712 transitions, 14490 flow. Second operand 29 states and 2938 transitions. [2021-12-06 22:06:13,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 784 transitions, 16494 flow [2021-12-06 22:06:14,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 784 transitions, 15912 flow, removed 1 selfloop flow, removed 25 redundant places. [2021-12-06 22:06:14,302 INFO L242 Difference]: Finished difference. Result has 503 places, 709 transitions, 14389 flow [2021-12-06 22:06:14,302 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=13910, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14389, PETRI_PLACES=503, PETRI_TRANSITIONS=709} [2021-12-06 22:06:14,303 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 348 predicate places. [2021-12-06 22:06:14,303 INFO L470 AbstractCegarLoop]: Abstraction has has 503 places, 709 transitions, 14389 flow [2021-12-06 22:06:14,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:14,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:06:14,304 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:14,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 22:06:14,304 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:06:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1922755978, now seen corresponding path program 14 times [2021-12-06 22:06:14,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:14,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304778191] [2021-12-06 22:06:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:14,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:06:14,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:14,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304778191] [2021-12-06 22:06:14,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304778191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:14,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400656890] [2021-12-06 22:06:14,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:06:14,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:14,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:14,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:14,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:06:14,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:06:14,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:14,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 22:06:14,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:14,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:06:14,979 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 22:06:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 22:06:15,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:06:15,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:06:15,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:06:15,806 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 22:06:15,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-12-06 22:06:15,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:06:15,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-12-06 22:06:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:06:15,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:16,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:06:16,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 70 [2021-12-06 22:06:16,396 INFO L354 Elim1Store]: treesize reduction 39, result has 64.2 percent of original size [2021-12-06 22:06:16,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 924 treesize of output 833 [2021-12-06 22:06:16,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:06:16,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 694 treesize of output 518 [2021-12-06 22:06:16,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:06:16,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 572 treesize of output 548 [2021-12-06 22:06:25,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:06:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:06:25,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400656890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:06:25,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:06:25,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 23] total 61 [2021-12-06 22:06:25,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497025669] [2021-12-06 22:06:25,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:06:25,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 22:06:25,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 22:06:25,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=3315, Unknown=26, NotChecked=0, Total=3660 [2021-12-06 22:06:25,248 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2021-12-06 22:06:25,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 709 transitions, 14389 flow. Second operand has 61 states, 61 states have (on average 86.68852459016394) internal successors, (5288), 61 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:25,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:06:25,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2021-12-06 22:06:25,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:06:32,097 INFO L129 PetriNetUnfolder]: 7128/13756 cut-off events. [2021-12-06 22:06:32,098 INFO L130 PetriNetUnfolder]: For 160650/160855 co-relation queries the response was YES. [2021-12-06 22:06:32,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77294 conditions, 13756 events. 7128/13756 cut-off events. For 160650/160855 co-relation queries the response was YES. Maximal size of possible extension queue 873. Compared 123229 event pairs, 1297 based on Foata normal form. 71/13762 useless extension candidates. Maximal degree in co-relation 77164. Up to 5815 conditions per place. [2021-12-06 22:06:32,291 INFO L132 encePairwiseOnDemand]: 133/174 looper letters, 408 selfloop transitions, 546 changer transitions 6/1033 dead transitions. [2021-12-06 22:06:32,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1033 transitions, 20194 flow [2021-12-06 22:06:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 22:06:32,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-12-06 22:06:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4730 transitions. [2021-12-06 22:06:32,294 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5227674624226348 [2021-12-06 22:06:32,294 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4730 transitions. [2021-12-06 22:06:32,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4730 transitions. [2021-12-06 22:06:32,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:06:32,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4730 transitions. [2021-12-06 22:06:32,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 90.96153846153847) internal successors, (4730), 52 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:32,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 174.0) internal successors, (9222), 53 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:32,301 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 174.0) internal successors, (9222), 53 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:32,302 INFO L186 Difference]: Start difference. First operand has 503 places, 709 transitions, 14389 flow. Second operand 52 states and 4730 transitions. [2021-12-06 22:06:32,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1033 transitions, 20194 flow [2021-12-06 22:06:33,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1033 transitions, 19768 flow, removed 9 selfloop flow, removed 27 redundant places. [2021-12-06 22:06:33,418 INFO L242 Difference]: Finished difference. Result has 542 places, 848 transitions, 18413 flow [2021-12-06 22:06:33,419 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=14018, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=18413, PETRI_PLACES=542, PETRI_TRANSITIONS=848} [2021-12-06 22:06:33,419 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 387 predicate places. [2021-12-06 22:06:33,419 INFO L470 AbstractCegarLoop]: Abstraction has has 542 places, 848 transitions, 18413 flow [2021-12-06 22:06:33,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 86.68852459016394) internal successors, (5288), 61 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:33,420 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:06:33,420 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:33,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:06:33,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:33,622 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:06:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1568905726, now seen corresponding path program 9 times [2021-12-06 22:06:33,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:33,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703816999] [2021-12-06 22:06:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:33,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:06:34,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:34,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703816999] [2021-12-06 22:06:34,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703816999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:06:34,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:06:34,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:06:34,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051206016] [2021-12-06 22:06:34,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:06:34,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:06:34,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:06:34,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:06:34,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:06:34,094 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2021-12-06 22:06:34,095 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 848 transitions, 18413 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:34,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:06:34,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2021-12-06 22:06:34,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:06:39,217 INFO L129 PetriNetUnfolder]: 7105/13722 cut-off events. [2021-12-06 22:06:39,218 INFO L130 PetriNetUnfolder]: For 198454/198644 co-relation queries the response was YES. [2021-12-06 22:06:39,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85752 conditions, 13722 events. 7105/13722 cut-off events. For 198454/198644 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 122864 event pairs, 1742 based on Foata normal form. 28/13663 useless extension candidates. Maximal degree in co-relation 85607. Up to 8267 conditions per place. [2021-12-06 22:06:39,434 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 518 selfloop transitions, 294 changer transitions 10/909 dead transitions. [2021-12-06 22:06:39,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 909 transitions, 20558 flow [2021-12-06 22:06:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:06:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:06:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2740 transitions. [2021-12-06 22:06:39,436 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5832269050659855 [2021-12-06 22:06:39,436 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2740 transitions. [2021-12-06 22:06:39,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2740 transitions. [2021-12-06 22:06:39,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:06:39,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2740 transitions. [2021-12-06 22:06:39,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 101.48148148148148) internal successors, (2740), 27 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:39,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:39,440 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:39,440 INFO L186 Difference]: Start difference. First operand has 542 places, 848 transitions, 18413 flow. Second operand 27 states and 2740 transitions. [2021-12-06 22:06:39,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 909 transitions, 20558 flow [2021-12-06 22:06:41,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 909 transitions, 19859 flow, removed 88 selfloop flow, removed 30 redundant places. [2021-12-06 22:06:41,055 INFO L242 Difference]: Finished difference. Result has 539 places, 842 transitions, 18154 flow [2021-12-06 22:06:41,056 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=17676, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=18154, PETRI_PLACES=539, PETRI_TRANSITIONS=842} [2021-12-06 22:06:41,056 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 384 predicate places. [2021-12-06 22:06:41,056 INFO L470 AbstractCegarLoop]: Abstraction has has 539 places, 842 transitions, 18154 flow [2021-12-06 22:06:41,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:06:41,057 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:06:41,057 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:06:41,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 22:06:41,057 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:06:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:06:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1004543884, now seen corresponding path program 10 times [2021-12-06 22:06:41,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:06:41,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980810643] [2021-12-06 22:06:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:06:41,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:06:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:06:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:06:41,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:06:41,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980810643] [2021-12-06 22:06:41,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980810643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:06:41,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040939676] [2021-12-06 22:06:41,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:06:41,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:06:41,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:06:41,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:06:41,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:06:41,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:06:41,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:06:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 22:06:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:06:41,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:06:41,629 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 22:06:41,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 22:06:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:06:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:06:41,833 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 22:06:41,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2021-12-06 22:06:42,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:06:42,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:06:42,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:06:42,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:06:42,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:06:42,426 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-12-06 22:06:42,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 17 [2021-12-06 22:06:42,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:06:42,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:06:42,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:06:42,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:06:42,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-12-06 22:06:43,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-12-06 22:06:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:06:43,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:06:43,563 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_605 (Array Int Int)) (v_ArrVal_606 (Array Int Int)) (v_ArrVal_603 Int)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 4) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_603)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_605))) (or (let ((.cse1 (* c_~i_AB~0 4))) (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select .cse0 c_~A~0.base) (+ .cse1 c_~A~0.offset)))) (not (let ((.cse2 (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_606)) (.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 c_~A~0.base) (+ .cse3 c_~A~0.offset)) (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse3 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))))) is different from false [2021-12-06 22:06:43,593 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_605 (Array Int Int)) (v_ArrVal_606 (Array Int Int)) (v_ArrVal_603 Int)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_603)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_605))) (or (let ((.cse1 (* c_~i_AB~0 4))) (= (select (select .cse0 c_~A~0.base) (+ .cse1 c_~A~0.offset)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (not (let ((.cse2 (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_606)) (.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 c_~A~0.base) (+ .cse3 c_~A~0.offset)) (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse3 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))))) is different from false [2021-12-06 22:06:43,614 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_605 (Array Int Int)) (v_ArrVal_606 (Array Int Int)) (v_ArrVal_603 Int)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base|) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_603)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_605))) (or (let ((.cse1 (* c_~i_AB~0 4))) (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base|) (+ .cse1 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select .cse0 c_~A~0.base) (+ .cse1 c_~A~0.offset)))) (not (let ((.cse2 (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_606)) (.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 c_~A~0.base) (+ .cse3 c_~A~0.offset)) (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base|) (+ .cse3 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))))) is different from false [2021-12-06 22:06:44,627 INFO L354 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2021-12-06 22:06:44,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 186 treesize of output 92 [2021-12-06 22:06:44,700 INFO L354 Elim1Store]: treesize reduction 47, result has 73.7 percent of original size [2021-12-06 22:06:44,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1842 treesize of output 1677 [2021-12-06 22:06:44,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:06:44,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1462 treesize of output 1095 [2021-12-06 22:06:44,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:06:44,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1144 treesize of output 1024 [2021-12-06 22:07:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-06 22:07:01,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040939676] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:01,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:01,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 26] total 65 [2021-12-06 22:07:01,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353036910] [2021-12-06 22:07:01,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:01,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 22:07:01,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:01,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 22:07:01,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=3351, Unknown=69, NotChecked=366, Total=4160 [2021-12-06 22:07:01,159 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2021-12-06 22:07:01,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 842 transitions, 18154 flow. Second operand has 65 states, 65 states have (on average 86.50769230769231) internal successors, (5623), 65 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:01,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:07:01,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2021-12-06 22:07:01,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:07:11,778 INFO L129 PetriNetUnfolder]: 7651/14643 cut-off events. [2021-12-06 22:07:11,778 INFO L130 PetriNetUnfolder]: For 202152/202347 co-relation queries the response was YES. [2021-12-06 22:07:11,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88994 conditions, 14643 events. 7651/14643 cut-off events. For 202152/202347 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 131908 event pairs, 1471 based on Foata normal form. 54/14618 useless extension candidates. Maximal degree in co-relation 88850. Up to 8739 conditions per place. [2021-12-06 22:07:12,000 INFO L132 encePairwiseOnDemand]: 133/174 looper letters, 606 selfloop transitions, 377 changer transitions 1/1057 dead transitions. [2021-12-06 22:07:12,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1057 transitions, 22661 flow [2021-12-06 22:07:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 22:07:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-06 22:07:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3438 transitions. [2021-12-06 22:07:12,003 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5199637023593466 [2021-12-06 22:07:12,003 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3438 transitions. [2021-12-06 22:07:12,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3438 transitions. [2021-12-06 22:07:12,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:07:12,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3438 transitions. [2021-12-06 22:07:12,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 90.47368421052632) internal successors, (3438), 38 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:12,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 174.0) internal successors, (6786), 39 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:12,009 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 174.0) internal successors, (6786), 39 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:12,009 INFO L186 Difference]: Start difference. First operand has 539 places, 842 transitions, 18154 flow. Second operand 38 states and 3438 transitions. [2021-12-06 22:07:12,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1057 transitions, 22661 flow [2021-12-06 22:07:13,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 1057 transitions, 21779 flow, removed 1 selfloop flow, removed 28 redundant places. [2021-12-06 22:07:13,397 INFO L242 Difference]: Finished difference. Result has 553 places, 892 transitions, 19158 flow [2021-12-06 22:07:13,397 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=17312, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=19158, PETRI_PLACES=553, PETRI_TRANSITIONS=892} [2021-12-06 22:07:13,398 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 398 predicate places. [2021-12-06 22:07:13,398 INFO L470 AbstractCegarLoop]: Abstraction has has 553 places, 892 transitions, 19158 flow [2021-12-06 22:07:13,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 86.50769230769231) internal successors, (5623), 65 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:13,398 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:07:13,399 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:13,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:07:13,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:13,600 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:07:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:13,601 INFO L85 PathProgramCache]: Analyzing trace with hash -295532832, now seen corresponding path program 11 times [2021-12-06 22:07:13,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:13,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896962568] [2021-12-06 22:07:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:13,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:07:13,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:13,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896962568] [2021-12-06 22:07:13,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896962568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:07:13,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:07:13,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:07:13,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533333804] [2021-12-06 22:07:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:07:13,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:07:13,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:07:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:07:13,882 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:07:13,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 892 transitions, 19158 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:13,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:07:13,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:07:13,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:07:19,306 INFO L129 PetriNetUnfolder]: 7729/14826 cut-off events. [2021-12-06 22:07:19,306 INFO L130 PetriNetUnfolder]: For 226522/226727 co-relation queries the response was YES. [2021-12-06 22:07:19,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95488 conditions, 14826 events. 7729/14826 cut-off events. For 226522/226727 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 133906 event pairs, 1835 based on Foata normal form. 29/14750 useless extension candidates. Maximal degree in co-relation 95338. Up to 8740 conditions per place. [2021-12-06 22:07:19,616 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 565 selfloop transitions, 325 changer transitions 0/983 dead transitions. [2021-12-06 22:07:19,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 983 transitions, 22275 flow [2021-12-06 22:07:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:07:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 22:07:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3225 transitions. [2021-12-06 22:07:19,618 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6391200951248514 [2021-12-06 22:07:19,619 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3225 transitions. [2021-12-06 22:07:19,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3225 transitions. [2021-12-06 22:07:19,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:07:19,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3225 transitions. [2021-12-06 22:07:19,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.20689655172414) internal successors, (3225), 29 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:19,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:19,623 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:19,623 INFO L186 Difference]: Start difference. First operand has 553 places, 892 transitions, 19158 flow. Second operand 29 states and 3225 transitions. [2021-12-06 22:07:19,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 983 transitions, 22275 flow [2021-12-06 22:07:21,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 983 transitions, 21580 flow, removed 58 selfloop flow, removed 30 redundant places. [2021-12-06 22:07:21,595 INFO L242 Difference]: Finished difference. Result has 555 places, 910 transitions, 19873 flow [2021-12-06 22:07:21,596 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=18520, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=19873, PETRI_PLACES=555, PETRI_TRANSITIONS=910} [2021-12-06 22:07:21,596 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 400 predicate places. [2021-12-06 22:07:21,596 INFO L470 AbstractCegarLoop]: Abstraction has has 555 places, 910 transitions, 19873 flow [2021-12-06 22:07:21,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:21,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:07:21,597 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:21,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 22:07:21,597 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:07:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1621067322, now seen corresponding path program 12 times [2021-12-06 22:07:21,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:21,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690690186] [2021-12-06 22:07:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:21,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:07:21,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:21,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690690186] [2021-12-06 22:07:21,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690690186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:07:21,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:07:21,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:07:21,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622982350] [2021-12-06 22:07:21,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:07:21,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:07:21,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:07:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:07:21,974 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:07:21,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 910 transitions, 19873 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:21,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:07:21,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:07:21,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:07:27,965 INFO L129 PetriNetUnfolder]: 7741/14838 cut-off events. [2021-12-06 22:07:27,965 INFO L130 PetriNetUnfolder]: For 219876/220068 co-relation queries the response was YES. [2021-12-06 22:07:28,141 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94495 conditions, 14838 events. 7741/14838 cut-off events. For 219876/220068 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 133752 event pairs, 1759 based on Foata normal form. 29/14772 useless extension candidates. Maximal degree in co-relation 94342. Up to 8741 conditions per place. [2021-12-06 22:07:28,205 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 513 selfloop transitions, 382 changer transitions 2/987 dead transitions. [2021-12-06 22:07:28,205 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 987 transitions, 22533 flow [2021-12-06 22:07:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:07:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 22:07:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3065 transitions. [2021-12-06 22:07:28,207 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6074118113357114 [2021-12-06 22:07:28,207 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3065 transitions. [2021-12-06 22:07:28,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3065 transitions. [2021-12-06 22:07:28,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:07:28,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3065 transitions. [2021-12-06 22:07:28,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 105.6896551724138) internal successors, (3065), 29 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:28,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:28,212 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:28,212 INFO L186 Difference]: Start difference. First operand has 555 places, 910 transitions, 19873 flow. Second operand 29 states and 3065 transitions. [2021-12-06 22:07:28,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 987 transitions, 22533 flow [2021-12-06 22:07:29,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 987 transitions, 22116 flow, removed 10 selfloop flow, removed 19 redundant places. [2021-12-06 22:07:29,894 INFO L242 Difference]: Finished difference. Result has 570 places, 918 transitions, 20660 flow [2021-12-06 22:07:29,894 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=19462, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=20660, PETRI_PLACES=570, PETRI_TRANSITIONS=918} [2021-12-06 22:07:29,895 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 415 predicate places. [2021-12-06 22:07:29,895 INFO L470 AbstractCegarLoop]: Abstraction has has 570 places, 918 transitions, 20660 flow [2021-12-06 22:07:29,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:29,895 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:07:29,895 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:29,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 22:07:29,895 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:07:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2009509352, now seen corresponding path program 15 times [2021-12-06 22:07:29,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:29,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179992756] [2021-12-06 22:07:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:29,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:07:30,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:30,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179992756] [2021-12-06 22:07:30,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179992756] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:07:30,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929246221] [2021-12-06 22:07:30,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:07:30,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:07:30,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:07:30,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:07:30,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:07:30,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 22:07:30,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:07:30,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 22:07:30,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:07:30,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:07:30,532 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 22:07:30,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 22:07:30,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:07:31,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:07:31,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 22:07:31,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:07:31,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 22:07:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:07:31,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:07:31,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:07:31,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 73 [2021-12-06 22:07:31,904 INFO L354 Elim1Store]: treesize reduction 39, result has 64.2 percent of original size [2021-12-06 22:07:31,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 616 treesize of output 573 [2021-12-06 22:07:31,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:07:31,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 504 treesize of output 432 [2021-12-06 22:07:31,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:07:31,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 384 treesize of output 396 [2021-12-06 22:07:42,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:07:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:07:42,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929246221] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:07:42,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:07:42,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 21] total 59 [2021-12-06 22:07:42,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504121874] [2021-12-06 22:07:42,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:07:42,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 22:07:42,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:42,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 22:07:42,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2989, Unknown=38, NotChecked=0, Total=3422 [2021-12-06 22:07:42,444 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2021-12-06 22:07:42,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 918 transitions, 20660 flow. Second operand has 59 states, 59 states have (on average 86.77966101694915) internal successors, (5120), 59 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:42,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:07:42,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2021-12-06 22:07:42,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:07:50,399 INFO L129 PetriNetUnfolder]: 7694/14682 cut-off events. [2021-12-06 22:07:50,399 INFO L130 PetriNetUnfolder]: For 244273/244466 co-relation queries the response was YES. [2021-12-06 22:07:50,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95939 conditions, 14682 events. 7694/14682 cut-off events. For 244273/244466 co-relation queries the response was YES. Maximal size of possible extension queue 930. Compared 131829 event pairs, 1255 based on Foata normal form. 100/14725 useless extension candidates. Maximal degree in co-relation 95782. Up to 5849 conditions per place. [2021-12-06 22:07:50,665 INFO L132 encePairwiseOnDemand]: 133/174 looper letters, 431 selfloop transitions, 637 changer transitions 1/1142 dead transitions. [2021-12-06 22:07:50,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1142 transitions, 25747 flow [2021-12-06 22:07:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 22:07:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-12-06 22:07:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4713 transitions. [2021-12-06 22:07:50,669 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5208885941644562 [2021-12-06 22:07:50,669 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4713 transitions. [2021-12-06 22:07:50,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4713 transitions. [2021-12-06 22:07:50,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:07:50,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4713 transitions. [2021-12-06 22:07:50,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 90.63461538461539) internal successors, (4713), 52 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:50,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 174.0) internal successors, (9222), 53 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:50,677 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 174.0) internal successors, (9222), 53 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:50,677 INFO L186 Difference]: Start difference. First operand has 570 places, 918 transitions, 20660 flow. Second operand 52 states and 4713 transitions. [2021-12-06 22:07:50,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1142 transitions, 25747 flow [2021-12-06 22:07:52,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 1142 transitions, 25243 flow, removed 23 selfloop flow, removed 20 redundant places. [2021-12-06 22:07:52,458 INFO L242 Difference]: Finished difference. Result has 605 places, 955 transitions, 22833 flow [2021-12-06 22:07:52,458 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=20166, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=22833, PETRI_PLACES=605, PETRI_TRANSITIONS=955} [2021-12-06 22:07:52,459 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 450 predicate places. [2021-12-06 22:07:52,459 INFO L470 AbstractCegarLoop]: Abstraction has has 605 places, 955 transitions, 22833 flow [2021-12-06 22:07:52,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 86.77966101694915) internal successors, (5120), 59 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:52,459 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:07:52,459 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:07:52,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:07:52,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 22:07:52,661 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:07:52,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:07:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash -337413404, now seen corresponding path program 13 times [2021-12-06 22:07:52,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:07:52,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145030532] [2021-12-06 22:07:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:07:52,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:07:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:07:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:07:52,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:07:52,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145030532] [2021-12-06 22:07:52,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145030532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:07:52,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:07:52,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:07:52,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569913863] [2021-12-06 22:07:52,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:07:52,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:07:52,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:07:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:07:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:07:52,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:07:52,984 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 955 transitions, 22833 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:52,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:07:52,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:07:52,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:07:58,679 INFO L129 PetriNetUnfolder]: 7746/14752 cut-off events. [2021-12-06 22:07:58,679 INFO L130 PetriNetUnfolder]: For 266718/266931 co-relation queries the response was YES. [2021-12-06 22:07:58,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101389 conditions, 14752 events. 7746/14752 cut-off events. For 266718/266931 co-relation queries the response was YES. Maximal size of possible extension queue 930. Compared 132485 event pairs, 1847 based on Foata normal form. 33/14682 useless extension candidates. Maximal degree in co-relation 101229. Up to 8475 conditions per place. [2021-12-06 22:07:58,941 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 588 selfloop transitions, 364 changer transitions 0/1045 dead transitions. [2021-12-06 22:07:58,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 1045 transitions, 26269 flow [2021-12-06 22:07:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:07:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:07:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3013 transitions. [2021-12-06 22:07:58,943 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6413367390378885 [2021-12-06 22:07:58,943 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3013 transitions. [2021-12-06 22:07:58,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3013 transitions. [2021-12-06 22:07:58,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:07:58,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3013 transitions. [2021-12-06 22:07:58,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.5925925925926) internal successors, (3013), 27 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:58,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:58,947 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:07:58,947 INFO L186 Difference]: Start difference. First operand has 605 places, 955 transitions, 22833 flow. Second operand 27 states and 3013 transitions. [2021-12-06 22:07:58,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 1045 transitions, 26269 flow [2021-12-06 22:08:00,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 1045 transitions, 25200 flow, removed 19 selfloop flow, removed 41 redundant places. [2021-12-06 22:08:00,887 INFO L242 Difference]: Finished difference. Result has 596 places, 980 transitions, 23695 flow [2021-12-06 22:08:00,888 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=21816, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=23695, PETRI_PLACES=596, PETRI_TRANSITIONS=980} [2021-12-06 22:08:00,888 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 441 predicate places. [2021-12-06 22:08:00,889 INFO L470 AbstractCegarLoop]: Abstraction has has 596 places, 980 transitions, 23695 flow [2021-12-06 22:08:00,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:00,889 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:08:00,889 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:00,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 22:08:00,889 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:08:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1944326404, now seen corresponding path program 14 times [2021-12-06 22:08:00,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:00,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711531113] [2021-12-06 22:08:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:00,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:08:01,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:01,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711531113] [2021-12-06 22:08:01,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711531113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:08:01,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:08:01,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:08:01,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746582351] [2021-12-06 22:08:01,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:08:01,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:08:01,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:01,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:08:01,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:08:01,123 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:08:01,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 980 transitions, 23695 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:01,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:08:01,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:08:01,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:08:06,970 INFO L129 PetriNetUnfolder]: 7724/14717 cut-off events. [2021-12-06 22:08:06,970 INFO L130 PetriNetUnfolder]: For 258015/258223 co-relation queries the response was YES. [2021-12-06 22:08:07,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100193 conditions, 14717 events. 7724/14717 cut-off events. For 258015/258223 co-relation queries the response was YES. Maximal size of possible extension queue 930. Compared 132025 event pairs, 1857 based on Foata normal form. 33/14649 useless extension candidates. Maximal degree in co-relation 100028. Up to 8475 conditions per place. [2021-12-06 22:08:07,240 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 596 selfloop transitions, 353 changer transitions 0/1042 dead transitions. [2021-12-06 22:08:07,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 1042 transitions, 26078 flow [2021-12-06 22:08:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:08:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:08:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3014 transitions. [2021-12-06 22:08:07,242 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6415495955725841 [2021-12-06 22:08:07,242 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3014 transitions. [2021-12-06 22:08:07,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3014 transitions. [2021-12-06 22:08:07,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:08:07,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3014 transitions. [2021-12-06 22:08:07,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.62962962962963) internal successors, (3014), 27 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:07,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:07,246 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:07,246 INFO L186 Difference]: Start difference. First operand has 596 places, 980 transitions, 23695 flow. Second operand 27 states and 3014 transitions. [2021-12-06 22:08:07,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 1042 transitions, 26078 flow [2021-12-06 22:08:09,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1042 transitions, 25320 flow, removed 10 selfloop flow, removed 26 redundant places. [2021-12-06 22:08:09,301 INFO L242 Difference]: Finished difference. Result has 599 places, 978 transitions, 23687 flow [2021-12-06 22:08:09,302 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=22730, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=23687, PETRI_PLACES=599, PETRI_TRANSITIONS=978} [2021-12-06 22:08:09,302 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 444 predicate places. [2021-12-06 22:08:09,302 INFO L470 AbstractCegarLoop]: Abstraction has has 599 places, 978 transitions, 23687 flow [2021-12-06 22:08:09,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:09,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:08:09,303 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:09,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-06 22:08:09,303 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:08:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash 625829492, now seen corresponding path program 16 times [2021-12-06 22:08:09,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:09,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558913208] [2021-12-06 22:08:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:09,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:08:09,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:09,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558913208] [2021-12-06 22:08:09,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558913208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:08:09,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:08:09,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-06 22:08:09,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774759459] [2021-12-06 22:08:09,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:08:09,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:08:09,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:09,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:08:09,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:08:09,612 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2021-12-06 22:08:09,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 978 transitions, 23687 flow. Second operand has 22 states, 22 states have (on average 98.54545454545455) internal successors, (2168), 22 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:09,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:08:09,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2021-12-06 22:08:09,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:08:15,814 INFO L129 PetriNetUnfolder]: 7828/14938 cut-off events. [2021-12-06 22:08:15,814 INFO L130 PetriNetUnfolder]: For 272053/272249 co-relation queries the response was YES. [2021-12-06 22:08:16,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101808 conditions, 14938 events. 7828/14938 cut-off events. For 272053/272249 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 134406 event pairs, 1649 based on Foata normal form. 89/14942 useless extension candidates. Maximal degree in co-relation 101645. Up to 7380 conditions per place. [2021-12-06 22:08:16,073 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 545 selfloop transitions, 504 changer transitions 1/1138 dead transitions. [2021-12-06 22:08:16,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 1138 transitions, 27528 flow [2021-12-06 22:08:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 22:08:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-06 22:08:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3422 transitions. [2021-12-06 22:08:16,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2021-12-06 22:08:16,076 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3422 transitions. [2021-12-06 22:08:16,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3422 transitions. [2021-12-06 22:08:16,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:08:16,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3422 transitions. [2021-12-06 22:08:16,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 103.6969696969697) internal successors, (3422), 33 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:16,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:16,082 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:16,082 INFO L186 Difference]: Start difference. First operand has 599 places, 978 transitions, 23687 flow. Second operand 33 states and 3422 transitions. [2021-12-06 22:08:16,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 1138 transitions, 27528 flow [2021-12-06 22:08:18,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 1138 transitions, 27000 flow, removed 15 selfloop flow, removed 21 redundant places. [2021-12-06 22:08:18,025 INFO L242 Difference]: Finished difference. Result has 617 places, 997 transitions, 24831 flow [2021-12-06 22:08:18,026 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=23167, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=24831, PETRI_PLACES=617, PETRI_TRANSITIONS=997} [2021-12-06 22:08:18,026 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 462 predicate places. [2021-12-06 22:08:18,026 INFO L470 AbstractCegarLoop]: Abstraction has has 617 places, 997 transitions, 24831 flow [2021-12-06 22:08:18,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.54545454545455) internal successors, (2168), 22 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:18,026 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:08:18,026 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:18,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 22:08:18,027 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:08:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:18,027 INFO L85 PathProgramCache]: Analyzing trace with hash 192562680, now seen corresponding path program 17 times [2021-12-06 22:08:18,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:18,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905888255] [2021-12-06 22:08:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:18,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:08:18,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:18,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905888255] [2021-12-06 22:08:18,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905888255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:08:18,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:08:18,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 22:08:18,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303320376] [2021-12-06 22:08:18,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:08:18,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:08:18,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:18,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:08:18,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:08:18,332 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2021-12-06 22:08:18,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 997 transitions, 24831 flow. Second operand has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:18,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:08:18,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2021-12-06 22:08:18,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:08:24,429 INFO L129 PetriNetUnfolder]: 7818/14909 cut-off events. [2021-12-06 22:08:24,429 INFO L130 PetriNetUnfolder]: For 291944/292140 co-relation queries the response was YES. [2021-12-06 22:08:24,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103962 conditions, 14909 events. 7818/14909 cut-off events. For 291944/292140 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 134205 event pairs, 1778 based on Foata normal form. 29/14847 useless extension candidates. Maximal degree in co-relation 103794. Up to 8618 conditions per place. [2021-12-06 22:08:24,764 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 605 selfloop transitions, 357 changer transitions 9/1059 dead transitions. [2021-12-06 22:08:24,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1059 transitions, 27371 flow [2021-12-06 22:08:24,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:08:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 22:08:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2963 transitions. [2021-12-06 22:08:24,794 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5871977804201347 [2021-12-06 22:08:24,794 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2963 transitions. [2021-12-06 22:08:24,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2963 transitions. [2021-12-06 22:08:24,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:08:24,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2963 transitions. [2021-12-06 22:08:24,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.17241379310344) internal successors, (2963), 29 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:24,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:24,798 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:24,799 INFO L186 Difference]: Start difference. First operand has 617 places, 997 transitions, 24831 flow. Second operand 29 states and 2963 transitions. [2021-12-06 22:08:24,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1059 transitions, 27371 flow [2021-12-06 22:08:26,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 1059 transitions, 27025 flow, removed 49 selfloop flow, removed 20 redundant places. [2021-12-06 22:08:26,876 INFO L242 Difference]: Finished difference. Result has 628 places, 994 transitions, 25165 flow [2021-12-06 22:08:26,876 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=24487, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=25165, PETRI_PLACES=628, PETRI_TRANSITIONS=994} [2021-12-06 22:08:26,877 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 473 predicate places. [2021-12-06 22:08:26,877 INFO L470 AbstractCegarLoop]: Abstraction has has 628 places, 994 transitions, 25165 flow [2021-12-06 22:08:26,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:26,877 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:08:26,877 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:26,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-06 22:08:26,878 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:08:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:26,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1467155696, now seen corresponding path program 18 times [2021-12-06 22:08:26,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:26,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656139721] [2021-12-06 22:08:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:26,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:08:27,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:27,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656139721] [2021-12-06 22:08:27,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656139721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:08:27,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:08:27,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-06 22:08:27,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594070700] [2021-12-06 22:08:27,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:08:27,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:08:27,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:08:27,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:08:27,220 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2021-12-06 22:08:27,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 994 transitions, 25165 flow. Second operand has 22 states, 22 states have (on average 98.54545454545455) internal successors, (2168), 22 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:27,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:08:27,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2021-12-06 22:08:27,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:08:33,762 INFO L129 PetriNetUnfolder]: 8115/15429 cut-off events. [2021-12-06 22:08:33,762 INFO L130 PetriNetUnfolder]: For 304831/305027 co-relation queries the response was YES. [2021-12-06 22:08:33,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106961 conditions, 15429 events. 8115/15429 cut-off events. For 304831/305027 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 139168 event pairs, 1741 based on Foata normal form. 91/15423 useless extension candidates. Maximal degree in co-relation 106793. Up to 8210 conditions per place. [2021-12-06 22:08:34,061 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 517 selfloop transitions, 513 changer transitions 0/1118 dead transitions. [2021-12-06 22:08:34,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1118 transitions, 29029 flow [2021-12-06 22:08:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:08:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 22:08:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2998 transitions. [2021-12-06 22:08:34,063 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5941339674990092 [2021-12-06 22:08:34,063 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2998 transitions. [2021-12-06 22:08:34,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2998 transitions. [2021-12-06 22:08:34,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:08:34,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2998 transitions. [2021-12-06 22:08:34,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 103.37931034482759) internal successors, (2998), 29 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:34,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:34,068 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:34,068 INFO L186 Difference]: Start difference. First operand has 628 places, 994 transitions, 25165 flow. Second operand 29 states and 2998 transitions. [2021-12-06 22:08:34,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1118 transitions, 29029 flow [2021-12-06 22:08:36,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 1118 transitions, 28435 flow, removed 9 selfloop flow, removed 25 redundant places. [2021-12-06 22:08:36,201 INFO L242 Difference]: Finished difference. Result has 636 places, 1026 transitions, 27075 flow [2021-12-06 22:08:36,201 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=24605, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=27075, PETRI_PLACES=636, PETRI_TRANSITIONS=1026} [2021-12-06 22:08:36,202 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 481 predicate places. [2021-12-06 22:08:36,202 INFO L470 AbstractCegarLoop]: Abstraction has has 636 places, 1026 transitions, 27075 flow [2021-12-06 22:08:36,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.54545454545455) internal successors, (2168), 22 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:36,202 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:08:36,202 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:36,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-06 22:08:36,202 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:08:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1840749382, now seen corresponding path program 19 times [2021-12-06 22:08:36,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:36,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844193678] [2021-12-06 22:08:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:36,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:08:36,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:36,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844193678] [2021-12-06 22:08:36,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844193678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:08:36,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:08:36,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 22:08:36,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485448045] [2021-12-06 22:08:36,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:08:36,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:08:36,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:36,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:08:36,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:08:36,514 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2021-12-06 22:08:36,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 1026 transitions, 27075 flow. Second operand has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:36,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:08:36,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2021-12-06 22:08:36,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:08:42,849 INFO L129 PetriNetUnfolder]: 8096/15415 cut-off events. [2021-12-06 22:08:42,849 INFO L130 PetriNetUnfolder]: For 325267/325463 co-relation queries the response was YES. [2021-12-06 22:08:43,094 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108599 conditions, 15415 events. 8096/15415 cut-off events. For 325267/325463 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 139327 event pairs, 1830 based on Foata normal form. 39/15355 useless extension candidates. Maximal degree in co-relation 108428. Up to 9034 conditions per place. [2021-12-06 22:08:43,168 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 612 selfloop transitions, 373 changer transitions 5/1078 dead transitions. [2021-12-06 22:08:43,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 1078 transitions, 29333 flow [2021-12-06 22:08:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:08:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:08:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2773 transitions. [2021-12-06 22:08:43,170 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5902511707109408 [2021-12-06 22:08:43,170 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2773 transitions. [2021-12-06 22:08:43,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2773 transitions. [2021-12-06 22:08:43,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:08:43,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2773 transitions. [2021-12-06 22:08:43,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.70370370370371) internal successors, (2773), 27 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:43,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:43,174 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:43,174 INFO L186 Difference]: Start difference. First operand has 636 places, 1026 transitions, 27075 flow. Second operand 27 states and 2773 transitions. [2021-12-06 22:08:43,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 1078 transitions, 29333 flow [2021-12-06 22:08:45,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1078 transitions, 28759 flow, removed 3 selfloop flow, removed 23 redundant places. [2021-12-06 22:08:45,762 INFO L242 Difference]: Finished difference. Result has 642 places, 1020 transitions, 27124 flow [2021-12-06 22:08:45,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=26119, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=27124, PETRI_PLACES=642, PETRI_TRANSITIONS=1020} [2021-12-06 22:08:45,763 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 487 predicate places. [2021-12-06 22:08:45,763 INFO L470 AbstractCegarLoop]: Abstraction has has 642 places, 1020 transitions, 27124 flow [2021-12-06 22:08:45,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:45,763 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:08:45,763 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:45,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-06 22:08:45,764 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:08:45,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1430135838, now seen corresponding path program 20 times [2021-12-06 22:08:45,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:45,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284703842] [2021-12-06 22:08:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:45,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:08:46,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284703842] [2021-12-06 22:08:46,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284703842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:08:46,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:08:46,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:08:46,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518520909] [2021-12-06 22:08:46,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:08:46,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:08:46,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:46,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:08:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:08:46,151 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2021-12-06 22:08:46,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 1020 transitions, 27124 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:46,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:08:46,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2021-12-06 22:08:46,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:08:52,581 INFO L129 PetriNetUnfolder]: 7947/15148 cut-off events. [2021-12-06 22:08:52,581 INFO L130 PetriNetUnfolder]: For 321791/321987 co-relation queries the response was YES. [2021-12-06 22:08:52,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106507 conditions, 15148 events. 7947/15148 cut-off events. For 321791/321987 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 136720 event pairs, 1844 based on Foata normal form. 39/15088 useless extension candidates. Maximal degree in co-relation 106334. Up to 8894 conditions per place. [2021-12-06 22:08:52,857 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 613 selfloop transitions, 345 changer transitions 6/1052 dead transitions. [2021-12-06 22:08:52,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 1052 transitions, 28747 flow [2021-12-06 22:08:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:08:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:08:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2672 transitions. [2021-12-06 22:08:52,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5906277630415562 [2021-12-06 22:08:52,860 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2672 transitions. [2021-12-06 22:08:52,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2672 transitions. [2021-12-06 22:08:52,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:08:52,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2672 transitions. [2021-12-06 22:08:52,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 102.76923076923077) internal successors, (2672), 26 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:52,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:52,864 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:52,864 INFO L186 Difference]: Start difference. First operand has 642 places, 1020 transitions, 27124 flow. Second operand 26 states and 2672 transitions. [2021-12-06 22:08:52,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 1052 transitions, 28747 flow [2021-12-06 22:08:55,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 1052 transitions, 28178 flow, removed 7 selfloop flow, removed 21 redundant places. [2021-12-06 22:08:55,136 INFO L242 Difference]: Finished difference. Result has 647 places, 995 transitions, 26416 flow [2021-12-06 22:08:55,137 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=25797, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26416, PETRI_PLACES=647, PETRI_TRANSITIONS=995} [2021-12-06 22:08:55,137 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 492 predicate places. [2021-12-06 22:08:55,137 INFO L470 AbstractCegarLoop]: Abstraction has has 647 places, 995 transitions, 26416 flow [2021-12-06 22:08:55,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:55,138 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:08:55,138 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:08:55,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-06 22:08:55,138 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:08:55,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:08:55,138 INFO L85 PathProgramCache]: Analyzing trace with hash -142244304, now seen corresponding path program 21 times [2021-12-06 22:08:55,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:08:55,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034085531] [2021-12-06 22:08:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:08:55,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:08:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:08:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:08:55,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:08:55,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034085531] [2021-12-06 22:08:55,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034085531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:08:55,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:08:55,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-06 22:08:55,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852734714] [2021-12-06 22:08:55,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:08:55,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:08:55,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:08:55,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:08:55,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:08:55,507 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2021-12-06 22:08:55,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 995 transitions, 26416 flow. Second operand has 22 states, 22 states have (on average 98.54545454545455) internal successors, (2168), 22 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:08:55,508 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:08:55,508 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2021-12-06 22:08:55,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:09:01,577 INFO L129 PetriNetUnfolder]: 7686/14606 cut-off events. [2021-12-06 22:09:01,577 INFO L130 PetriNetUnfolder]: For 316224/316420 co-relation queries the response was YES. [2021-12-06 22:09:01,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103470 conditions, 14606 events. 7686/14606 cut-off events. For 316224/316420 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 130741 event pairs, 1736 based on Foata normal form. 91/14596 useless extension candidates. Maximal degree in co-relation 103297. Up to 7837 conditions per place. [2021-12-06 22:09:01,861 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 493 selfloop transitions, 493 changer transitions 0/1074 dead transitions. [2021-12-06 22:09:01,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 1074 transitions, 28968 flow [2021-12-06 22:09:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:09:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-06 22:09:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2888 transitions. [2021-12-06 22:09:01,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5927750410509032 [2021-12-06 22:09:01,863 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2888 transitions. [2021-12-06 22:09:01,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2888 transitions. [2021-12-06 22:09:01,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:09:01,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2888 transitions. [2021-12-06 22:09:01,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 103.14285714285714) internal successors, (2888), 28 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:01,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:01,867 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:01,867 INFO L186 Difference]: Start difference. First operand has 647 places, 995 transitions, 26416 flow. Second operand 28 states and 2888 transitions. [2021-12-06 22:09:01,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 1074 transitions, 28968 flow [2021-12-06 22:09:04,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 1074 transitions, 27948 flow, removed 18 selfloop flow, removed 33 redundant places. [2021-12-06 22:09:04,176 INFO L242 Difference]: Finished difference. Result has 638 places, 987 transitions, 26381 flow [2021-12-06 22:09:04,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=24847, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=26381, PETRI_PLACES=638, PETRI_TRANSITIONS=987} [2021-12-06 22:09:04,177 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 483 predicate places. [2021-12-06 22:09:04,177 INFO L470 AbstractCegarLoop]: Abstraction has has 638 places, 987 transitions, 26381 flow [2021-12-06 22:09:04,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.54545454545455) internal successors, (2168), 22 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:04,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:09:04,177 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:04,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-06 22:09:04,178 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:09:04,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:04,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1172912786, now seen corresponding path program 15 times [2021-12-06 22:09:04,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:04,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476892261] [2021-12-06 22:09:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:04,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:09:04,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:04,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476892261] [2021-12-06 22:09:04,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476892261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:09:04,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:09:04,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:09:04,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364549807] [2021-12-06 22:09:04,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:09:04,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:09:04,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:04,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:09:04,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:09:04,502 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:09:04,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 987 transitions, 26381 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:04,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:09:04,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:09:04,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:09:10,743 INFO L129 PetriNetUnfolder]: 7695/14596 cut-off events. [2021-12-06 22:09:10,743 INFO L130 PetriNetUnfolder]: For 315119/315314 co-relation queries the response was YES. [2021-12-06 22:09:10,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103760 conditions, 14596 events. 7695/14596 cut-off events. For 315119/315314 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 130651 event pairs, 1823 based on Foata normal form. 29/14521 useless extension candidates. Maximal degree in co-relation 103590. Up to 8575 conditions per place. [2021-12-06 22:09:11,004 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 573 selfloop transitions, 381 changer transitions 0/1044 dead transitions. [2021-12-06 22:09:11,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 1044 transitions, 28815 flow [2021-12-06 22:09:11,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:09:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:09:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2854 transitions. [2021-12-06 22:09:11,006 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6074925500212857 [2021-12-06 22:09:11,006 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2854 transitions. [2021-12-06 22:09:11,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2854 transitions. [2021-12-06 22:09:11,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:09:11,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2854 transitions. [2021-12-06 22:09:11,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 105.70370370370371) internal successors, (2854), 27 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:11,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:11,010 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:11,010 INFO L186 Difference]: Start difference. First operand has 638 places, 987 transitions, 26381 flow. Second operand 27 states and 2854 transitions. [2021-12-06 22:09:11,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 1044 transitions, 28815 flow [2021-12-06 22:09:13,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 1044 transitions, 28505 flow, removed 3 selfloop flow, removed 21 redundant places. [2021-12-06 22:09:13,240 INFO L242 Difference]: Finished difference. Result has 645 places, 989 transitions, 27092 flow [2021-12-06 22:09:13,240 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=26072, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=27092, PETRI_PLACES=645, PETRI_TRANSITIONS=989} [2021-12-06 22:09:13,241 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 490 predicate places. [2021-12-06 22:09:13,241 INFO L470 AbstractCegarLoop]: Abstraction has has 645 places, 989 transitions, 27092 flow [2021-12-06 22:09:13,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:13,241 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:09:13,241 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:13,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-06 22:09:13,241 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:09:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:13,242 INFO L85 PathProgramCache]: Analyzing trace with hash -36139122, now seen corresponding path program 16 times [2021-12-06 22:09:13,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:13,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322382046] [2021-12-06 22:09:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:13,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:09:13,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:13,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322382046] [2021-12-06 22:09:13,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322382046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:09:13,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:09:13,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:09:13,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393507162] [2021-12-06 22:09:13,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:09:13,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:09:13,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:13,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:09:13,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:09:13,587 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:09:13,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 989 transitions, 27092 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:13,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:09:13,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:09:13,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:09:19,902 INFO L129 PetriNetUnfolder]: 7674/14565 cut-off events. [2021-12-06 22:09:19,902 INFO L130 PetriNetUnfolder]: For 327685/327880 co-relation queries the response was YES. [2021-12-06 22:09:20,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104023 conditions, 14565 events. 7674/14565 cut-off events. For 327685/327880 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 130318 event pairs, 1831 based on Foata normal form. 29/14491 useless extension candidates. Maximal degree in co-relation 103853. Up to 8575 conditions per place. [2021-12-06 22:09:20,169 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 543 selfloop transitions, 405 changer transitions 1/1039 dead transitions. [2021-12-06 22:09:20,169 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 1039 transitions, 29304 flow [2021-12-06 22:09:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:09:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:09:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2852 transitions. [2021-12-06 22:09:20,171 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6070668369518945 [2021-12-06 22:09:20,171 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2852 transitions. [2021-12-06 22:09:20,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2852 transitions. [2021-12-06 22:09:20,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:09:20,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2852 transitions. [2021-12-06 22:09:20,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 105.62962962962963) internal successors, (2852), 27 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:20,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:20,175 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:20,175 INFO L186 Difference]: Start difference. First operand has 645 places, 989 transitions, 27092 flow. Second operand 27 states and 2852 transitions. [2021-12-06 22:09:20,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 1039 transitions, 29304 flow [2021-12-06 22:09:22,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 1039 transitions, 28843 flow, removed 5 selfloop flow, removed 19 redundant places. [2021-12-06 22:09:22,490 INFO L242 Difference]: Finished difference. Result has 651 places, 983 transitions, 27276 flow [2021-12-06 22:09:22,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=26489, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=27276, PETRI_PLACES=651, PETRI_TRANSITIONS=983} [2021-12-06 22:09:22,491 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 496 predicate places. [2021-12-06 22:09:22,492 INFO L470 AbstractCegarLoop]: Abstraction has has 651 places, 983 transitions, 27276 flow [2021-12-06 22:09:22,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:22,492 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:09:22,492 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:22,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-06 22:09:22,492 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:09:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:22,492 INFO L85 PathProgramCache]: Analyzing trace with hash -241734338, now seen corresponding path program 17 times [2021-12-06 22:09:22,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:22,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196370064] [2021-12-06 22:09:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:22,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:09:22,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:22,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196370064] [2021-12-06 22:09:22,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196370064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:09:22,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:09:22,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:09:22,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136883646] [2021-12-06 22:09:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:09:22,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:09:22,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:22,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:09:22,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:09:22,813 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:09:22,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 983 transitions, 27276 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:22,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:09:22,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:09:22,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:09:28,959 INFO L129 PetriNetUnfolder]: 7686/14643 cut-off events. [2021-12-06 22:09:28,959 INFO L130 PetriNetUnfolder]: For 336263/336458 co-relation queries the response was YES. [2021-12-06 22:09:29,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104496 conditions, 14643 events. 7686/14643 cut-off events. For 336263/336458 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 131565 event pairs, 1830 based on Foata normal form. 31/14564 useless extension candidates. Maximal degree in co-relation 104326. Up to 8575 conditions per place. [2021-12-06 22:09:29,246 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 609 selfloop transitions, 335 changer transitions 15/1049 dead transitions. [2021-12-06 22:09:29,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 678 places, 1049 transitions, 29905 flow [2021-12-06 22:09:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:09:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-06 22:09:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2944 transitions. [2021-12-06 22:09:29,248 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6042692939244664 [2021-12-06 22:09:29,248 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2944 transitions. [2021-12-06 22:09:29,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2944 transitions. [2021-12-06 22:09:29,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:09:29,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2944 transitions. [2021-12-06 22:09:29,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 105.14285714285714) internal successors, (2944), 28 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:29,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:29,253 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:29,253 INFO L186 Difference]: Start difference. First operand has 651 places, 983 transitions, 27276 flow. Second operand 28 states and 2944 transitions. [2021-12-06 22:09:29,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 678 places, 1049 transitions, 29905 flow [2021-12-06 22:09:31,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 654 places, 1049 transitions, 29170 flow, removed 4 selfloop flow, removed 24 redundant places. [2021-12-06 22:09:31,645 INFO L242 Difference]: Finished difference. Result has 656 places, 978 transitions, 27091 flow [2021-12-06 22:09:31,646 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=26550, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=27091, PETRI_PLACES=656, PETRI_TRANSITIONS=978} [2021-12-06 22:09:31,646 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 501 predicate places. [2021-12-06 22:09:31,646 INFO L470 AbstractCegarLoop]: Abstraction has has 656 places, 978 transitions, 27091 flow [2021-12-06 22:09:31,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:31,647 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:09:31,647 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:31,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-06 22:09:31,647 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:09:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:31,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1885853430, now seen corresponding path program 18 times [2021-12-06 22:09:31,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:31,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771297271] [2021-12-06 22:09:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:31,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:09:31,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771297271] [2021-12-06 22:09:31,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771297271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:09:31,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:09:31,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:09:31,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475788416] [2021-12-06 22:09:31,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:09:31,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:09:31,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:31,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:09:31,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:09:31,975 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:09:31,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 978 transitions, 27091 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:31,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:09:31,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:09:31,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:09:37,962 INFO L129 PetriNetUnfolder]: 7662/14584 cut-off events. [2021-12-06 22:09:37,962 INFO L130 PetriNetUnfolder]: For 338603/338798 co-relation queries the response was YES. [2021-12-06 22:09:38,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103751 conditions, 14584 events. 7662/14584 cut-off events. For 338603/338798 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 131027 event pairs, 1843 based on Foata normal form. 31/14509 useless extension candidates. Maximal degree in co-relation 103584. Up to 8575 conditions per place. [2021-12-06 22:09:38,338 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 592 selfloop transitions, 343 changer transitions 9/1034 dead transitions. [2021-12-06 22:09:38,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 1034 transitions, 29463 flow [2021-12-06 22:09:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:09:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:09:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2740 transitions. [2021-12-06 22:09:38,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6056587091069849 [2021-12-06 22:09:38,341 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2740 transitions. [2021-12-06 22:09:38,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2740 transitions. [2021-12-06 22:09:38,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:09:38,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2740 transitions. [2021-12-06 22:09:38,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 105.38461538461539) internal successors, (2740), 26 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:38,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:38,345 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:38,345 INFO L186 Difference]: Start difference. First operand has 656 places, 978 transitions, 27091 flow. Second operand 26 states and 2740 transitions. [2021-12-06 22:09:38,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 1034 transitions, 29463 flow [2021-12-06 22:09:40,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 1034 transitions, 28984 flow, removed 7 selfloop flow, removed 27 redundant places. [2021-12-06 22:09:40,624 INFO L242 Difference]: Finished difference. Result has 651 places, 974 transitions, 27176 flow [2021-12-06 22:09:40,625 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=26614, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=27176, PETRI_PLACES=651, PETRI_TRANSITIONS=974} [2021-12-06 22:09:40,625 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 496 predicate places. [2021-12-06 22:09:40,625 INFO L470 AbstractCegarLoop]: Abstraction has has 651 places, 974 transitions, 27176 flow [2021-12-06 22:09:40,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:40,625 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:09:40,626 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:40,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-06 22:09:40,626 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:09:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:40,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2052552526, now seen corresponding path program 19 times [2021-12-06 22:09:40,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:40,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791230744] [2021-12-06 22:09:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:40,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:09:40,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:40,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791230744] [2021-12-06 22:09:40,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791230744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:09:40,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:09:40,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 22:09:40,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784962187] [2021-12-06 22:09:40,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:09:40,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:09:40,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:40,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:09:40,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:09:40,944 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-06 22:09:40,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 974 transitions, 27176 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:40,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:09:40,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-06 22:09:40,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:09:47,024 INFO L129 PetriNetUnfolder]: 7614/14504 cut-off events. [2021-12-06 22:09:47,024 INFO L130 PetriNetUnfolder]: For 350174/350369 co-relation queries the response was YES. [2021-12-06 22:09:47,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103090 conditions, 14504 events. 7614/14504 cut-off events. For 350174/350369 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 130071 event pairs, 1850 based on Foata normal form. 31/14427 useless extension candidates. Maximal degree in co-relation 102924. Up to 8575 conditions per place. [2021-12-06 22:09:47,344 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 600 selfloop transitions, 329 changer transitions 9/1028 dead transitions. [2021-12-06 22:09:47,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 1028 transitions, 29447 flow [2021-12-06 22:09:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:09:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:09:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2740 transitions. [2021-12-06 22:09:47,347 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6056587091069849 [2021-12-06 22:09:47,347 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2740 transitions. [2021-12-06 22:09:47,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2740 transitions. [2021-12-06 22:09:47,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:09:47,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2740 transitions. [2021-12-06 22:09:47,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 105.38461538461539) internal successors, (2740), 26 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:47,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:47,351 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:47,351 INFO L186 Difference]: Start difference. First operand has 651 places, 974 transitions, 27176 flow. Second operand 26 states and 2740 transitions. [2021-12-06 22:09:47,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 1028 transitions, 29447 flow [2021-12-06 22:09:49,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 1028 transitions, 28715 flow, removed 2 selfloop flow, removed 28 redundant places. [2021-12-06 22:09:49,467 INFO L242 Difference]: Finished difference. Result has 647 places, 968 transitions, 26899 flow [2021-12-06 22:09:49,468 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=26357, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26899, PETRI_PLACES=647, PETRI_TRANSITIONS=968} [2021-12-06 22:09:49,468 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 492 predicate places. [2021-12-06 22:09:49,468 INFO L470 AbstractCegarLoop]: Abstraction has has 647 places, 968 transitions, 26899 flow [2021-12-06 22:09:49,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:49,468 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:09:49,469 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:09:49,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-06 22:09:49,469 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:09:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:09:49,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1571051632, now seen corresponding path program 20 times [2021-12-06 22:09:49,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:09:49,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828512528] [2021-12-06 22:09:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:09:49,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:09:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:09:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:09:49,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:09:49,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828512528] [2021-12-06 22:09:49,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828512528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:09:49,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556193951] [2021-12-06 22:09:49,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:09:49,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:09:49,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:09:49,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:09:49,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:09:49,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:09:49,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:09:49,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 22:09:49,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:09:50,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:09:50,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 22:09:50,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:09:50,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-12-06 22:09:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:09:50,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:09:52,727 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_916 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_916))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse0 (+ (* c_~i_AB~0 4) c_~B~0.offset))) (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ .cse1 c_~A~0.offset))))))))) is different from false [2021-12-06 22:09:52,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:09:52,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 200 [2021-12-06 22:09:52,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:09:52,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 102 [2021-12-06 22:09:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:09:53,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556193951] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:09:53,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:09:53,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 16] total 49 [2021-12-06 22:09:53,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186041412] [2021-12-06 22:09:53,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:09:53,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 22:09:53,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:09:53,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 22:09:53,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1994, Unknown=4, NotChecked=92, Total=2352 [2021-12-06 22:09:53,916 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2021-12-06 22:09:53,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 968 transitions, 26899 flow. Second operand has 49 states, 49 states have (on average 97.61224489795919) internal successors, (4783), 49 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:09:53,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:09:53,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2021-12-06 22:09:53,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:10:00,797 INFO L129 PetriNetUnfolder]: 7815/14826 cut-off events. [2021-12-06 22:10:00,797 INFO L130 PetriNetUnfolder]: For 357584/357781 co-relation queries the response was YES. [2021-12-06 22:10:00,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105558 conditions, 14826 events. 7815/14826 cut-off events. For 357584/357781 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 133272 event pairs, 1627 based on Foata normal form. 51/14775 useless extension candidates. Maximal degree in co-relation 105393. Up to 7910 conditions per place. [2021-12-06 22:10:01,063 INFO L132 encePairwiseOnDemand]: 138/174 looper letters, 630 selfloop transitions, 503 changer transitions 1/1221 dead transitions. [2021-12-06 22:10:01,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 1221 transitions, 32846 flow [2021-12-06 22:10:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 22:10:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-06 22:10:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4274 transitions. [2021-12-06 22:10:01,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5848385331143952 [2021-12-06 22:10:01,066 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4274 transitions. [2021-12-06 22:10:01,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4274 transitions. [2021-12-06 22:10:01,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:10:01,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4274 transitions. [2021-12-06 22:10:01,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 101.76190476190476) internal successors, (4274), 42 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:01,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 174.0) internal successors, (7482), 43 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:01,072 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 174.0) internal successors, (7482), 43 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:01,072 INFO L186 Difference]: Start difference. First operand has 647 places, 968 transitions, 26899 flow. Second operand 42 states and 4274 transitions. [2021-12-06 22:10:01,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 1221 transitions, 32846 flow [2021-12-06 22:10:03,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 1221 transitions, 31907 flow, removed 2 selfloop flow, removed 29 redundant places. [2021-12-06 22:10:03,286 INFO L242 Difference]: Finished difference. Result has 661 places, 1034 transitions, 28662 flow [2021-12-06 22:10:03,287 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=26001, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=968, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=28662, PETRI_PLACES=661, PETRI_TRANSITIONS=1034} [2021-12-06 22:10:03,287 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 506 predicate places. [2021-12-06 22:10:03,287 INFO L470 AbstractCegarLoop]: Abstraction has has 661 places, 1034 transitions, 28662 flow [2021-12-06 22:10:03,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 97.61224489795919) internal successors, (4783), 49 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:03,288 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:10:03,288 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:03,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 22:10:03,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 22:10:03,490 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:10:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:03,491 INFO L85 PathProgramCache]: Analyzing trace with hash -442175856, now seen corresponding path program 21 times [2021-12-06 22:10:03,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:03,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221846950] [2021-12-06 22:10:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:03,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:10:03,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:03,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221846950] [2021-12-06 22:10:03,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221846950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:03,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825719560] [2021-12-06 22:10:03,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:10:03,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:03,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:03,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:03,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:10:03,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 22:10:03,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:10:03,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 22:10:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:04,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 22:10:04,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:10:04,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-12-06 22:10:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:10:04,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:06,845 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_949 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_949))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ .cse1 c_~A~0.offset))))) (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse0 (+ (* c_~i_AB~0 4) c_~B~0.offset))))))) is different from false [2021-12-06 22:10:06,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:10:06,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 200 [2021-12-06 22:10:06,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:10:06,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 102 [2021-12-06 22:10:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:10:07,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825719560] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:07,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:07,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 16] total 49 [2021-12-06 22:10:07,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473977246] [2021-12-06 22:10:07,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:07,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 22:10:07,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:07,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 22:10:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1992, Unknown=3, NotChecked=92, Total=2352 [2021-12-06 22:10:07,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2021-12-06 22:10:07,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 1034 transitions, 28662 flow. Second operand has 49 states, 49 states have (on average 97.61224489795919) internal successors, (4783), 49 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:07,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:10:07,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2021-12-06 22:10:07,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:10:14,806 INFO L129 PetriNetUnfolder]: 7964/15089 cut-off events. [2021-12-06 22:10:14,807 INFO L130 PetriNetUnfolder]: For 368207/368404 co-relation queries the response was YES. [2021-12-06 22:10:15,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109986 conditions, 15089 events. 7964/15089 cut-off events. For 368207/368404 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 135825 event pairs, 1658 based on Foata normal form. 43/15030 useless extension candidates. Maximal degree in co-relation 109817. Up to 7961 conditions per place. [2021-12-06 22:10:15,086 INFO L132 encePairwiseOnDemand]: 139/174 looper letters, 647 selfloop transitions, 503 changer transitions 1/1238 dead transitions. [2021-12-06 22:10:15,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 1238 transitions, 33921 flow [2021-12-06 22:10:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 22:10:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-06 22:10:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3587 transitions. [2021-12-06 22:10:15,089 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5889983579638752 [2021-12-06 22:10:15,089 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3587 transitions. [2021-12-06 22:10:15,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3587 transitions. [2021-12-06 22:10:15,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:10:15,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3587 transitions. [2021-12-06 22:10:15,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 102.48571428571428) internal successors, (3587), 35 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:15,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:15,094 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:15,094 INFO L186 Difference]: Start difference. First operand has 661 places, 1034 transitions, 28662 flow. Second operand 35 states and 3587 transitions. [2021-12-06 22:10:15,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 1238 transitions, 33921 flow [2021-12-06 22:10:17,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 663 places, 1238 transitions, 32081 flow, removed 204 selfloop flow, removed 32 redundant places. [2021-12-06 22:10:17,685 INFO L242 Difference]: Finished difference. Result has 666 places, 1069 transitions, 28999 flow [2021-12-06 22:10:17,686 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=26965, PETRI_DIFFERENCE_MINUEND_PLACES=629, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=28999, PETRI_PLACES=666, PETRI_TRANSITIONS=1069} [2021-12-06 22:10:17,686 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 511 predicate places. [2021-12-06 22:10:17,686 INFO L470 AbstractCegarLoop]: Abstraction has has 666 places, 1069 transitions, 28999 flow [2021-12-06 22:10:17,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 97.61224489795919) internal successors, (4783), 49 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:17,687 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:10:17,687 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:17,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 22:10:17,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 22:10:17,888 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:10:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1233823630, now seen corresponding path program 22 times [2021-12-06 22:10:17,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:17,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526883088] [2021-12-06 22:10:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:17,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:10:18,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:18,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526883088] [2021-12-06 22:10:18,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526883088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:10:18,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421044330] [2021-12-06 22:10:18,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:10:18,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:18,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:18,265 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:18,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:10:18,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:10:18,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:10:18,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 22:10:18,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:10:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:10:18,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 22:10:18,924 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 22:10:18,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-06 22:10:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:10:18,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:10:19,048 WARN L838 $PredicateComparison]: unable to prove that (forall ((~B~0.base Int) (v_ArrVal_982 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_982))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ .cse1 c_~A~0.offset))))) (= (select .cse0 (+ (* c_~i_AB~0 4) c_~B~0.offset)) |c_thread1Thread1of1ForFork0_#t~mem1|))))) is different from false [2021-12-06 22:10:19,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:10:19,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 200 [2021-12-06 22:10:19,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:10:19,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 102 [2021-12-06 22:10:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:10:19,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421044330] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:10:19,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:10:19,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 46 [2021-12-06 22:10:19,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722942788] [2021-12-06 22:10:19,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:10:19,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 22:10:19,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:19,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 22:10:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1747, Unknown=1, NotChecked=86, Total=2070 [2021-12-06 22:10:19,952 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2021-12-06 22:10:19,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 1069 transitions, 28999 flow. Second operand has 46 states, 46 states have (on average 97.8695652173913) internal successors, (4502), 46 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:19,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:10:19,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2021-12-06 22:10:19,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:10:27,968 INFO L129 PetriNetUnfolder]: 8244/15636 cut-off events. [2021-12-06 22:10:27,969 INFO L130 PetriNetUnfolder]: For 369802/369999 co-relation queries the response was YES. [2021-12-06 22:10:28,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114910 conditions, 15636 events. 8244/15636 cut-off events. For 369802/369999 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 141572 event pairs, 1581 based on Foata normal form. 53/15587 useless extension candidates. Maximal degree in co-relation 114743. Up to 7951 conditions per place. [2021-12-06 22:10:28,308 INFO L132 encePairwiseOnDemand]: 140/174 looper letters, 701 selfloop transitions, 683 changer transitions 1/1472 dead transitions. [2021-12-06 22:10:28,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 1472 transitions, 41312 flow [2021-12-06 22:10:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 22:10:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-12-06 22:10:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4482 transitions. [2021-12-06 22:10:28,311 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.585423197492163 [2021-12-06 22:10:28,311 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4482 transitions. [2021-12-06 22:10:28,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4482 transitions. [2021-12-06 22:10:28,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:10:28,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4482 transitions. [2021-12-06 22:10:28,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 101.86363636363636) internal successors, (4482), 44 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:28,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 174.0) internal successors, (7830), 45 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:28,318 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 174.0) internal successors, (7830), 45 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:28,318 INFO L186 Difference]: Start difference. First operand has 666 places, 1069 transitions, 28999 flow. Second operand 44 states and 4482 transitions. [2021-12-06 22:10:28,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 1472 transitions, 41312 flow [2021-12-06 22:10:31,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 682 places, 1472 transitions, 40285 flow, removed 80 selfloop flow, removed 27 redundant places. [2021-12-06 22:10:31,039 INFO L242 Difference]: Finished difference. Result has 692 places, 1266 transitions, 36881 flow [2021-12-06 22:10:31,039 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=28228, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=36881, PETRI_PLACES=692, PETRI_TRANSITIONS=1266} [2021-12-06 22:10:31,040 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 537 predicate places. [2021-12-06 22:10:31,040 INFO L470 AbstractCegarLoop]: Abstraction has has 692 places, 1266 transitions, 36881 flow [2021-12-06 22:10:31,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 97.8695652173913) internal successors, (4502), 46 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:31,040 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:10:31,040 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:31,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 22:10:31,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:31,242 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:10:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1562019108, now seen corresponding path program 23 times [2021-12-06 22:10:31,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:31,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174338431] [2021-12-06 22:10:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:31,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:10:31,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:31,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174338431] [2021-12-06 22:10:31,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174338431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:10:31,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:10:31,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:10:31,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058276787] [2021-12-06 22:10:31,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:10:31,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:10:31,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:10:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:10:31,498 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:10:31,499 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 1266 transitions, 36881 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:31,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:10:31,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:10:31,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:10:38,738 INFO L129 PetriNetUnfolder]: 8334/15846 cut-off events. [2021-12-06 22:10:38,738 INFO L130 PetriNetUnfolder]: For 420808/421064 co-relation queries the response was YES. [2021-12-06 22:10:38,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124218 conditions, 15846 events. 8334/15846 cut-off events. For 420808/421064 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 142888 event pairs, 1599 based on Foata normal form. 41/15776 useless extension candidates. Maximal degree in co-relation 124040. Up to 8741 conditions per place. [2021-12-06 22:10:39,078 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 647 selfloop transitions, 643 changer transitions 0/1383 dead transitions. [2021-12-06 22:10:39,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 1383 transitions, 41995 flow [2021-12-06 22:10:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:10:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 22:10:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3216 transitions. [2021-12-06 22:10:39,080 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6373365041617123 [2021-12-06 22:10:39,080 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3216 transitions. [2021-12-06 22:10:39,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3216 transitions. [2021-12-06 22:10:39,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:10:39,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3216 transitions. [2021-12-06 22:10:39,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.89655172413794) internal successors, (3216), 29 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:39,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:39,085 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:39,085 INFO L186 Difference]: Start difference. First operand has 692 places, 1266 transitions, 36881 flow. Second operand 29 states and 3216 transitions. [2021-12-06 22:10:39,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 1383 transitions, 41995 flow [2021-12-06 22:10:42,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 1383 transitions, 40747 flow, removed 22 selfloop flow, removed 30 redundant places. [2021-12-06 22:10:42,116 INFO L242 Difference]: Finished difference. Result has 696 places, 1311 transitions, 38968 flow [2021-12-06 22:10:42,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=35688, PETRI_DIFFERENCE_MINUEND_PLACES=662, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=602, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=38968, PETRI_PLACES=696, PETRI_TRANSITIONS=1311} [2021-12-06 22:10:42,117 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 541 predicate places. [2021-12-06 22:10:42,117 INFO L470 AbstractCegarLoop]: Abstraction has has 696 places, 1311 transitions, 38968 flow [2021-12-06 22:10:42,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:42,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:10:42,118 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:42,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-06 22:10:42,118 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:10:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash -371723194, now seen corresponding path program 22 times [2021-12-06 22:10:42,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:42,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207481712] [2021-12-06 22:10:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:42,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:10:42,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:42,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207481712] [2021-12-06 22:10:42,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207481712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:10:42,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:10:42,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:10:42,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433367708] [2021-12-06 22:10:42,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:10:42,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:10:42,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:10:42,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:10:42,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:10:42,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 1311 transitions, 38968 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:42,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:10:42,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:10:42,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:10:49,561 INFO L129 PetriNetUnfolder]: 8336/15878 cut-off events. [2021-12-06 22:10:49,562 INFO L130 PetriNetUnfolder]: For 437633/437880 co-relation queries the response was YES. [2021-12-06 22:10:49,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123694 conditions, 15878 events. 8336/15878 cut-off events. For 437633/437880 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 143332 event pairs, 1747 based on Foata normal form. 43/15811 useless extension candidates. Maximal degree in co-relation 123510. Up to 8741 conditions per place. [2021-12-06 22:10:49,905 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 884 selfloop transitions, 398 changer transitions 3/1378 dead transitions. [2021-12-06 22:10:49,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 1378 transitions, 42606 flow [2021-12-06 22:10:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:10:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-12-06 22:10:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2770 transitions. [2021-12-06 22:10:49,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6367816091954023 [2021-12-06 22:10:49,908 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2770 transitions. [2021-12-06 22:10:49,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2770 transitions. [2021-12-06 22:10:49,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:10:49,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2770 transitions. [2021-12-06 22:10:49,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 110.8) internal successors, (2770), 25 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:49,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:49,912 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:49,912 INFO L186 Difference]: Start difference. First operand has 696 places, 1311 transitions, 38968 flow. Second operand 25 states and 2770 transitions. [2021-12-06 22:10:49,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 1378 transitions, 42606 flow [2021-12-06 22:10:52,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 1378 transitions, 41990 flow, removed 14 selfloop flow, removed 20 redundant places. [2021-12-06 22:10:52,908 INFO L242 Difference]: Finished difference. Result has 704 places, 1324 transitions, 39789 flow [2021-12-06 22:10:52,909 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=38296, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=39789, PETRI_PLACES=704, PETRI_TRANSITIONS=1324} [2021-12-06 22:10:52,909 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 549 predicate places. [2021-12-06 22:10:52,909 INFO L470 AbstractCegarLoop]: Abstraction has has 704 places, 1324 transitions, 39789 flow [2021-12-06 22:10:52,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:52,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:10:52,910 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:52,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-06 22:10:52,910 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:10:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:52,910 INFO L85 PathProgramCache]: Analyzing trace with hash -208397400, now seen corresponding path program 24 times [2021-12-06 22:10:52,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:52,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374590860] [2021-12-06 22:10:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:52,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:10:53,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:53,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374590860] [2021-12-06 22:10:53,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374590860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:10:53,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:10:53,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:10:53,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791205679] [2021-12-06 22:10:53,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:10:53,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:10:53,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:10:53,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:10:53,143 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:10:53,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 1324 transitions, 39789 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:53,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:10:53,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:10:53,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:11:00,557 INFO L129 PetriNetUnfolder]: 8294/15795 cut-off events. [2021-12-06 22:11:00,557 INFO L130 PetriNetUnfolder]: For 427237/427493 co-relation queries the response was YES. [2021-12-06 22:11:00,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123068 conditions, 15795 events. 8294/15795 cut-off events. For 427237/427493 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 142358 event pairs, 1687 based on Foata normal form. 43/15727 useless extension candidates. Maximal degree in co-relation 122882. Up to 8741 conditions per place. [2021-12-06 22:11:00,878 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 667 selfloop transitions, 610 changer transitions 1/1371 dead transitions. [2021-12-06 22:11:00,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 1371 transitions, 42535 flow [2021-12-06 22:11:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:11:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:11:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2881 transitions. [2021-12-06 22:11:00,879 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6368258178603006 [2021-12-06 22:11:00,880 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2881 transitions. [2021-12-06 22:11:00,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2881 transitions. [2021-12-06 22:11:00,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:11:00,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2881 transitions. [2021-12-06 22:11:00,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 110.8076923076923) internal successors, (2881), 26 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:00,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:00,912 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:00,912 INFO L186 Difference]: Start difference. First operand has 704 places, 1324 transitions, 39789 flow. Second operand 26 states and 2881 transitions. [2021-12-06 22:11:00,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 1371 transitions, 42535 flow [2021-12-06 22:11:03,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 1371 transitions, 41783 flow, removed 18 selfloop flow, removed 21 redundant places. [2021-12-06 22:11:03,773 INFO L242 Difference]: Finished difference. Result has 713 places, 1319 transitions, 40438 flow [2021-12-06 22:11:03,774 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=38311, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=598, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=40438, PETRI_PLACES=713, PETRI_TRANSITIONS=1319} [2021-12-06 22:11:03,774 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 558 predicate places. [2021-12-06 22:11:03,775 INFO L470 AbstractCegarLoop]: Abstraction has has 713 places, 1319 transitions, 40438 flow [2021-12-06 22:11:03,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:03,775 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:11:03,775 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:03,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-06 22:11:03,775 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:11:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1302871998, now seen corresponding path program 23 times [2021-12-06 22:11:03,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:03,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76124604] [2021-12-06 22:11:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:03,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:11:03,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:03,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76124604] [2021-12-06 22:11:03,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76124604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:11:03,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:11:03,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:11:03,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494584252] [2021-12-06 22:11:03,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:11:03,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:11:03,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:03,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:11:03,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:11:03,997 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:11:03,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 1319 transitions, 40438 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:03,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:11:03,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:11:03,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:11:11,569 INFO L129 PetriNetUnfolder]: 8276/15767 cut-off events. [2021-12-06 22:11:11,569 INFO L130 PetriNetUnfolder]: For 448308/448555 co-relation queries the response was YES. [2021-12-06 22:11:11,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123761 conditions, 15767 events. 8276/15767 cut-off events. For 448308/448555 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 142316 event pairs, 1742 based on Foata normal form. 44/15704 useless extension candidates. Maximal degree in co-relation 123571. Up to 8741 conditions per place. [2021-12-06 22:11:11,899 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 857 selfloop transitions, 419 changer transitions 3/1372 dead transitions. [2021-12-06 22:11:11,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 1372 transitions, 43368 flow [2021-12-06 22:11:11,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:11:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:11:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2878 transitions. [2021-12-06 22:11:11,901 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6361626878868258 [2021-12-06 22:11:11,901 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2878 transitions. [2021-12-06 22:11:11,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2878 transitions. [2021-12-06 22:11:11,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:11:11,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2878 transitions. [2021-12-06 22:11:11,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 110.6923076923077) internal successors, (2878), 26 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:11,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:11,905 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:11,905 INFO L186 Difference]: Start difference. First operand has 713 places, 1319 transitions, 40438 flow. Second operand 26 states and 2878 transitions. [2021-12-06 22:11:11,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 1372 transitions, 43368 flow [2021-12-06 22:11:14,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 1372 transitions, 42935 flow, removed 3 selfloop flow, removed 18 redundant places. [2021-12-06 22:11:14,802 INFO L242 Difference]: Finished difference. Result has 722 places, 1315 transitions, 40776 flow [2021-12-06 22:11:14,803 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=39867, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=40776, PETRI_PLACES=722, PETRI_TRANSITIONS=1315} [2021-12-06 22:11:14,803 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 567 predicate places. [2021-12-06 22:11:14,804 INFO L470 AbstractCegarLoop]: Abstraction has has 722 places, 1315 transitions, 40776 flow [2021-12-06 22:11:14,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:14,804 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:11:14,804 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:14,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-06 22:11:14,804 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:11:14,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1935441116, now seen corresponding path program 25 times [2021-12-06 22:11:14,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:14,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546148434] [2021-12-06 22:11:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:14,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:11:15,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:15,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546148434] [2021-12-06 22:11:15,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546148434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:11:15,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:11:15,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:11:15,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751334371] [2021-12-06 22:11:15,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:11:15,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:11:15,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:15,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:11:15,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:11:15,041 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:11:15,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 722 places, 1315 transitions, 40776 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:15,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:11:15,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:11:15,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:11:22,751 INFO L129 PetriNetUnfolder]: 8285/15773 cut-off events. [2021-12-06 22:11:22,752 INFO L130 PetriNetUnfolder]: For 452889/453145 co-relation queries the response was YES. [2021-12-06 22:11:23,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124641 conditions, 15773 events. 8285/15773 cut-off events. For 452889/453145 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 142236 event pairs, 1704 based on Foata normal form. 37/15703 useless extension candidates. Maximal degree in co-relation 124449. Up to 8741 conditions per place. [2021-12-06 22:11:23,099 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 671 selfloop transitions, 617 changer transitions 1/1382 dead transitions. [2021-12-06 22:11:23,099 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 1382 transitions, 44187 flow [2021-12-06 22:11:23,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:11:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 22:11:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3210 transitions. [2021-12-06 22:11:23,101 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6361474435196195 [2021-12-06 22:11:23,101 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3210 transitions. [2021-12-06 22:11:23,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3210 transitions. [2021-12-06 22:11:23,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:11:23,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3210 transitions. [2021-12-06 22:11:23,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.6896551724138) internal successors, (3210), 29 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:23,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:23,106 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:23,106 INFO L186 Difference]: Start difference. First operand has 722 places, 1315 transitions, 40776 flow. Second operand 29 states and 3210 transitions. [2021-12-06 22:11:23,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 1382 transitions, 44187 flow [2021-12-06 22:11:25,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 728 places, 1382 transitions, 43407 flow, removed 4 selfloop flow, removed 22 redundant places. [2021-12-06 22:11:25,996 INFO L242 Difference]: Finished difference. Result has 733 places, 1321 transitions, 41603 flow [2021-12-06 22:11:25,997 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=40007, PETRI_DIFFERENCE_MINUEND_PLACES=700, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=41603, PETRI_PLACES=733, PETRI_TRANSITIONS=1321} [2021-12-06 22:11:25,998 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 578 predicate places. [2021-12-06 22:11:25,998 INFO L470 AbstractCegarLoop]: Abstraction has has 733 places, 1321 transitions, 41603 flow [2021-12-06 22:11:25,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:25,998 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:11:25,998 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:25,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-06 22:11:25,998 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:11:25,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:25,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1520138536, now seen corresponding path program 26 times [2021-12-06 22:11:25,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:25,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991111963] [2021-12-06 22:11:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:25,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:11:26,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:26,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991111963] [2021-12-06 22:11:26,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991111963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:11:26,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:11:26,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:11:26,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993320246] [2021-12-06 22:11:26,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:11:26,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:11:26,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:11:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:11:26,251 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:11:26,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 1321 transitions, 41603 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:26,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:11:26,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:11:26,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:11:33,844 INFO L129 PetriNetUnfolder]: 8206/15625 cut-off events. [2021-12-06 22:11:33,844 INFO L130 PetriNetUnfolder]: For 439672/439928 co-relation queries the response was YES. [2021-12-06 22:11:34,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123204 conditions, 15625 events. 8206/15625 cut-off events. For 439672/439928 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 140881 event pairs, 1682 based on Foata normal form. 44/15559 useless extension candidates. Maximal degree in co-relation 123008. Up to 8739 conditions per place. [2021-12-06 22:11:34,191 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 633 selfloop transitions, 628 changer transitions 0/1354 dead transitions. [2021-12-06 22:11:34,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 1354 transitions, 43375 flow [2021-12-06 22:11:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:11:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:11:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2882 transitions. [2021-12-06 22:11:34,193 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6370468611847923 [2021-12-06 22:11:34,193 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2882 transitions. [2021-12-06 22:11:34,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2882 transitions. [2021-12-06 22:11:34,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:11:34,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2882 transitions. [2021-12-06 22:11:34,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 110.84615384615384) internal successors, (2882), 26 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:34,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:34,197 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:34,197 INFO L186 Difference]: Start difference. First operand has 733 places, 1321 transitions, 41603 flow. Second operand 26 states and 2882 transitions. [2021-12-06 22:11:34,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 1354 transitions, 43375 flow [2021-12-06 22:11:37,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 1354 transitions, 42216 flow, removed 30 selfloop flow, removed 29 redundant places. [2021-12-06 22:11:37,087 INFO L242 Difference]: Finished difference. Result has 728 places, 1297 transitions, 40638 flow [2021-12-06 22:11:37,088 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=39240, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=40638, PETRI_PLACES=728, PETRI_TRANSITIONS=1297} [2021-12-06 22:11:37,088 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 573 predicate places. [2021-12-06 22:11:37,088 INFO L470 AbstractCegarLoop]: Abstraction has has 728 places, 1297 transitions, 40638 flow [2021-12-06 22:11:37,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:37,089 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:11:37,089 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:37,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-06 22:11:37,089 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:11:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1255392388, now seen corresponding path program 27 times [2021-12-06 22:11:37,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110248506] [2021-12-06 22:11:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:37,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:11:37,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:37,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110248506] [2021-12-06 22:11:37,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110248506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:11:37,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:11:37,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:11:37,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934850337] [2021-12-06 22:11:37,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:11:37,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:11:37,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:11:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:11:37,321 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:11:37,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 1297 transitions, 40638 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:37,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:11:37,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:11:37,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:11:44,751 INFO L129 PetriNetUnfolder]: 8185/15599 cut-off events. [2021-12-06 22:11:44,751 INFO L130 PetriNetUnfolder]: For 439792/440044 co-relation queries the response was YES. [2021-12-06 22:11:44,989 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123270 conditions, 15599 events. 8185/15599 cut-off events. For 439792/440044 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 140483 event pairs, 1639 based on Foata normal form. 38/15527 useless extension candidates. Maximal degree in co-relation 123081. Up to 8739 conditions per place. [2021-12-06 22:11:45,070 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 654 selfloop transitions, 598 changer transitions 1/1346 dead transitions. [2021-12-06 22:11:45,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 1346 transitions, 43531 flow [2021-12-06 22:11:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:11:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-06 22:11:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2993 transitions. [2021-12-06 22:11:45,072 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6370796083439761 [2021-12-06 22:11:45,072 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2993 transitions. [2021-12-06 22:11:45,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2993 transitions. [2021-12-06 22:11:45,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:11:45,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2993 transitions. [2021-12-06 22:11:45,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 110.85185185185185) internal successors, (2993), 27 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:45,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:45,076 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:45,076 INFO L186 Difference]: Start difference. First operand has 728 places, 1297 transitions, 40638 flow. Second operand 27 states and 2993 transitions. [2021-12-06 22:11:45,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 1346 transitions, 43531 flow [2021-12-06 22:11:47,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 1346 transitions, 42737 flow, removed 5 selfloop flow, removed 21 redundant places. [2021-12-06 22:11:47,848 INFO L242 Difference]: Finished difference. Result has 733 places, 1294 transitions, 41018 flow [2021-12-06 22:11:47,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=39614, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=593, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=41018, PETRI_PLACES=733, PETRI_TRANSITIONS=1294} [2021-12-06 22:11:47,849 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 578 predicate places. [2021-12-06 22:11:47,849 INFO L470 AbstractCegarLoop]: Abstraction has has 733 places, 1294 transitions, 41018 flow [2021-12-06 22:11:47,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:47,850 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:11:47,850 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:47,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-06 22:11:47,850 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:11:47,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:47,850 INFO L85 PathProgramCache]: Analyzing trace with hash 19948450, now seen corresponding path program 24 times [2021-12-06 22:11:47,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:47,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397102020] [2021-12-06 22:11:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:47,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:11:48,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:48,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397102020] [2021-12-06 22:11:48,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397102020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:11:48,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:11:48,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:11:48,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863728971] [2021-12-06 22:11:48,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:11:48,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:11:48,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:11:48,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:11:48,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:11:48,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 1294 transitions, 41018 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:48,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:11:48,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:11:48,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:11:55,436 INFO L129 PetriNetUnfolder]: 8175/15581 cut-off events. [2021-12-06 22:11:55,436 INFO L130 PetriNetUnfolder]: For 455787/456022 co-relation queries the response was YES. [2021-12-06 22:11:55,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123234 conditions, 15581 events. 8175/15581 cut-off events. For 455787/456022 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 140592 event pairs, 1750 based on Foata normal form. 33/15508 useless extension candidates. Maximal degree in co-relation 123046. Up to 8739 conditions per place. [2021-12-06 22:11:55,761 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 885 selfloop transitions, 360 changer transitions 8/1346 dead transitions. [2021-12-06 22:11:55,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 1346 transitions, 44020 flow [2021-12-06 22:11:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:11:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-06 22:11:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3081 transitions. [2021-12-06 22:11:55,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6323891625615764 [2021-12-06 22:11:55,764 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3081 transitions. [2021-12-06 22:11:55,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3081 transitions. [2021-12-06 22:11:55,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:11:55,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3081 transitions. [2021-12-06 22:11:55,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 110.03571428571429) internal successors, (3081), 28 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:55,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:55,768 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:55,768 INFO L186 Difference]: Start difference. First operand has 733 places, 1294 transitions, 41018 flow. Second operand 28 states and 3081 transitions. [2021-12-06 22:11:55,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 760 places, 1346 transitions, 44020 flow [2021-12-06 22:11:58,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 1346 transitions, 42353 flow, removed 15 selfloop flow, removed 36 redundant places. [2021-12-06 22:11:58,549 INFO L242 Difference]: Finished difference. Result has 726 places, 1290 transitions, 40007 flow [2021-12-06 22:11:58,550 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=39321, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=40007, PETRI_PLACES=726, PETRI_TRANSITIONS=1290} [2021-12-06 22:11:58,550 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 571 predicate places. [2021-12-06 22:11:58,550 INFO L470 AbstractCegarLoop]: Abstraction has has 726 places, 1290 transitions, 40007 flow [2021-12-06 22:11:58,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:58,551 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:11:58,551 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:58,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-06 22:11:58,551 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:11:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1433818886, now seen corresponding path program 25 times [2021-12-06 22:11:58,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:58,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941381197] [2021-12-06 22:11:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:58,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:11:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:11:58,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:58,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941381197] [2021-12-06 22:11:58,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941381197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:11:58,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:11:58,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:11:58,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456188756] [2021-12-06 22:11:58,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:11:58,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:11:58,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:58,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:11:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:11:58,771 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:11:58,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 1290 transitions, 40007 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:58,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:11:58,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:11:58,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:12:05,761 INFO L129 PetriNetUnfolder]: 8177/15563 cut-off events. [2021-12-06 22:12:05,761 INFO L130 PetriNetUnfolder]: For 444035/444266 co-relation queries the response was YES. [2021-12-06 22:12:05,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122063 conditions, 15563 events. 8177/15563 cut-off events. For 444035/444266 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 140071 event pairs, 1622 based on Foata normal form. 35/15490 useless extension candidates. Maximal degree in co-relation 121889. Up to 8742 conditions per place. [2021-12-06 22:12:06,067 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 770 selfloop transitions, 487 changer transitions 0/1350 dead transitions. [2021-12-06 22:12:06,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 1350 transitions, 43091 flow [2021-12-06 22:12:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:12:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-12-06 22:12:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2773 transitions. [2021-12-06 22:12:06,069 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6374712643678161 [2021-12-06 22:12:06,069 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2773 transitions. [2021-12-06 22:12:06,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2773 transitions. [2021-12-06 22:12:06,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:12:06,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2773 transitions. [2021-12-06 22:12:06,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 110.92) internal successors, (2773), 25 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:06,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:06,073 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:06,073 INFO L186 Difference]: Start difference. First operand has 726 places, 1290 transitions, 40007 flow. Second operand 25 states and 2773 transitions. [2021-12-06 22:12:06,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 1350 transitions, 43091 flow [2021-12-06 22:12:08,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 1350 transitions, 42504 flow, removed 4 selfloop flow, removed 29 redundant places. [2021-12-06 22:12:08,714 INFO L242 Difference]: Finished difference. Result has 720 places, 1294 transitions, 41000 flow [2021-12-06 22:12:08,716 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=39424, PETRI_DIFFERENCE_MINUEND_PLACES=694, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=805, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=41000, PETRI_PLACES=720, PETRI_TRANSITIONS=1294} [2021-12-06 22:12:08,716 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 565 predicate places. [2021-12-06 22:12:08,716 INFO L470 AbstractCegarLoop]: Abstraction has has 720 places, 1294 transitions, 41000 flow [2021-12-06 22:12:08,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:08,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:12:08,716 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:08,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-06 22:12:08,716 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:12:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1588630356, now seen corresponding path program 26 times [2021-12-06 22:12:08,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:08,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916110324] [2021-12-06 22:12:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:08,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:12:08,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:08,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916110324] [2021-12-06 22:12:08,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916110324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:12:08,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:12:08,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:12:08,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051787828] [2021-12-06 22:12:08,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:12:08,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:12:08,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:12:08,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:12:08,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:12:08,945 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:12:08,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 1294 transitions, 41000 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:08,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:12:08,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:12:08,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:12:15,990 INFO L129 PetriNetUnfolder]: 8141/15524 cut-off events. [2021-12-06 22:12:15,990 INFO L130 PetriNetUnfolder]: For 450875/451106 co-relation queries the response was YES. [2021-12-06 22:12:16,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122437 conditions, 15524 events. 8141/15524 cut-off events. For 450875/451106 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 139926 event pairs, 1738 based on Foata normal form. 34/15450 useless extension candidates. Maximal degree in co-relation 122264. Up to 8740 conditions per place. [2021-12-06 22:12:16,310 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 878 selfloop transitions, 353 changer transitions 4/1328 dead transitions. [2021-12-06 22:12:16,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 1328 transitions, 43329 flow [2021-12-06 22:12:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:12:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:12:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2864 transitions. [2021-12-06 22:12:16,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6330680813439434 [2021-12-06 22:12:16,313 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2864 transitions. [2021-12-06 22:12:16,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2864 transitions. [2021-12-06 22:12:16,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:12:16,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2864 transitions. [2021-12-06 22:12:16,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 110.15384615384616) internal successors, (2864), 26 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:16,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:16,317 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:16,317 INFO L186 Difference]: Start difference. First operand has 720 places, 1294 transitions, 41000 flow. Second operand 26 states and 2864 transitions. [2021-12-06 22:12:16,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 1328 transitions, 43329 flow [2021-12-06 22:12:18,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 1328 transitions, 41769 flow, removed 3 selfloop flow, removed 29 redundant places. [2021-12-06 22:12:18,916 INFO L242 Difference]: Finished difference. Result has 713 places, 1281 transitions, 39623 flow [2021-12-06 22:12:18,918 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=38958, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=39623, PETRI_PLACES=713, PETRI_TRANSITIONS=1281} [2021-12-06 22:12:18,918 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 558 predicate places. [2021-12-06 22:12:18,918 INFO L470 AbstractCegarLoop]: Abstraction has has 713 places, 1281 transitions, 39623 flow [2021-12-06 22:12:18,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:18,919 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:12:18,919 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:18,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-06 22:12:18,919 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:12:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash 614032934, now seen corresponding path program 27 times [2021-12-06 22:12:18,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:18,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704812882] [2021-12-06 22:12:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:18,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:12:19,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:19,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704812882] [2021-12-06 22:12:19,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704812882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:12:19,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:12:19,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:12:19,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978521208] [2021-12-06 22:12:19,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:12:19,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:12:19,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:12:19,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:12:19,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:12:19,219 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:12:19,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 1281 transitions, 39623 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:19,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:12:19,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:12:19,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:12:26,084 INFO L129 PetriNetUnfolder]: 8119/15485 cut-off events. [2021-12-06 22:12:26,085 INFO L130 PetriNetUnfolder]: For 423801/424032 co-relation queries the response was YES. [2021-12-06 22:12:26,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121276 conditions, 15485 events. 8119/15485 cut-off events. For 423801/424032 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 139405 event pairs, 1619 based on Foata normal form. 32/15409 useless extension candidates. Maximal degree in co-relation 121104. Up to 8737 conditions per place. [2021-12-06 22:12:26,429 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 785 selfloop transitions, 457 changer transitions 0/1335 dead transitions. [2021-12-06 22:12:26,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 1335 transitions, 42584 flow [2021-12-06 22:12:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:12:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:12:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2878 transitions. [2021-12-06 22:12:26,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6361626878868258 [2021-12-06 22:12:26,431 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2878 transitions. [2021-12-06 22:12:26,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2878 transitions. [2021-12-06 22:12:26,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:12:26,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2878 transitions. [2021-12-06 22:12:26,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 110.6923076923077) internal successors, (2878), 26 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:26,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:26,435 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:26,435 INFO L186 Difference]: Start difference. First operand has 713 places, 1281 transitions, 39623 flow. Second operand 26 states and 2878 transitions. [2021-12-06 22:12:26,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 1335 transitions, 42584 flow [2021-12-06 22:12:29,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 1335 transitions, 41286 flow, removed 4 selfloop flow, removed 30 redundant places. [2021-12-06 22:12:29,119 INFO L242 Difference]: Finished difference. Result has 707 places, 1283 transitions, 39729 flow [2021-12-06 22:12:29,120 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=38327, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=39729, PETRI_PLACES=707, PETRI_TRANSITIONS=1283} [2021-12-06 22:12:29,120 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 552 predicate places. [2021-12-06 22:12:29,121 INFO L470 AbstractCegarLoop]: Abstraction has has 707 places, 1283 transitions, 39729 flow [2021-12-06 22:12:29,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:29,121 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:12:29,121 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:29,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-06 22:12:29,121 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:12:29,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1806487034, now seen corresponding path program 28 times [2021-12-06 22:12:29,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:29,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704169660] [2021-12-06 22:12:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:29,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:12:29,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:29,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704169660] [2021-12-06 22:12:29,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704169660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:12:29,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:12:29,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 22:12:29,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245027791] [2021-12-06 22:12:29,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:12:29,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:12:29,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:12:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:12:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:12:29,380 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-12-06 22:12:29,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 1283 transitions, 39729 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:29,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:12:29,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-12-06 22:12:29,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:12:36,404 INFO L129 PetriNetUnfolder]: 8075/15426 cut-off events. [2021-12-06 22:12:36,404 INFO L130 PetriNetUnfolder]: For 410133/410368 co-relation queries the response was YES. [2021-12-06 22:12:36,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120583 conditions, 15426 events. 8075/15426 cut-off events. For 410133/410368 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 138922 event pairs, 1802 based on Foata normal form. 36/15356 useless extension candidates. Maximal degree in co-relation 120412. Up to 8725 conditions per place. [2021-12-06 22:12:36,716 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 771 selfloop transitions, 460 changer transitions 1/1325 dead transitions. [2021-12-06 22:12:36,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 1325 transitions, 42218 flow [2021-12-06 22:12:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:12:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-06 22:12:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2870 transitions. [2021-12-06 22:12:36,718 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.634394341290893 [2021-12-06 22:12:36,718 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2870 transitions. [2021-12-06 22:12:36,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2870 transitions. [2021-12-06 22:12:36,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:12:36,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2870 transitions. [2021-12-06 22:12:36,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 110.38461538461539) internal successors, (2870), 26 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:36,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:36,722 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:36,722 INFO L186 Difference]: Start difference. First operand has 707 places, 1283 transitions, 39729 flow. Second operand 26 states and 2870 transitions. [2021-12-06 22:12:36,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 1325 transitions, 42218 flow [2021-12-06 22:12:39,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 1325 transitions, 41554 flow, removed 5 selfloop flow, removed 19 redundant places. [2021-12-06 22:12:39,291 INFO L242 Difference]: Finished difference. Result has 711 places, 1273 transitions, 39612 flow [2021-12-06 22:12:39,292 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=38719, PETRI_DIFFERENCE_MINUEND_PLACES=686, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=39612, PETRI_PLACES=711, PETRI_TRANSITIONS=1273} [2021-12-06 22:12:39,292 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 556 predicate places. [2021-12-06 22:12:39,292 INFO L470 AbstractCegarLoop]: Abstraction has has 711 places, 1273 transitions, 39612 flow [2021-12-06 22:12:39,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:12:39,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:12:39,293 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:12:39,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-06 22:12:39,293 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:12:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:12:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1652364568, now seen corresponding path program 29 times [2021-12-06 22:12:39,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:12:39,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10752469] [2021-12-06 22:12:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:12:39,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:12:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:12:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:12:39,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:12:39,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10752469] [2021-12-06 22:12:39,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10752469] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:12:39,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226449746] [2021-12-06 22:12:39,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:12:39,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:12:39,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:12:39,527 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:12:39,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_776ee1f5-16d9-449c-b47f-f10ebf667906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:12:39,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:12:39,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:12:39,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 22:12:39,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:12:39,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:12:39,647 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 22:12:39,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 22:12:39,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:12:39,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:12:39,856 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 22:12:39,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-12-06 22:12:39,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:12:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:12:40,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:12:40,391 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-12-06 22:12:40,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2021-12-06 22:12:40,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:12:40,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:12:40,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:12:41,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-12-06 22:12:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:12:41,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:12:42,340 INFO L354 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2021-12-06 22:12:42,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 188 treesize of output 94 [2021-12-06 22:12:42,414 INFO L354 Elim1Store]: treesize reduction 56, result has 65.6 percent of original size [2021-12-06 22:12:42,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 3142 treesize of output 2792 [2021-12-06 22:12:42,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:12:42,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:12:42,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:12:42,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2668 treesize of output 2404 [2021-12-06 22:12:42,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:12:42,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:12:42,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:12:42,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2348 treesize of output 1764