./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-mult-equiv.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_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/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_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/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_a07ec936-8bcb-4b42-8175-b101abf216f8/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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:23:54,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:23:54,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:23:54,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:23:54,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:23:54,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:23:54,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:23:54,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:23:54,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:23:54,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:23:54,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:23:54,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:23:54,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:23:54,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:23:54,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:23:54,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:23:54,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:23:54,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:23:54,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:23:54,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:23:54,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:23:54,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:23:54,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:23:54,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:23:54,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:23:54,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:23:54,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:23:54,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:23:54,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:23:54,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:23:54,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:23:54,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:23:54,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:23:54,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:23:54,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:23:54,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:23:54,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:23:54,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:23:54,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:23:54,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:23:54,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:23:54,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:23:54,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:23:54,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:23:54,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:23:54,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:23:54,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:23:54,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:23:54,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:23:54,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:23:54,107 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:23:54,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:23:54,107 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:23:54,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:23:54,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:23:54,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:23:54,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:23:54,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:23:54,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:23:54,108 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:23:54,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:23:54,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:23:54,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:23:54,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:23:54,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:23:54,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:23:54,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:23:54,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:23:54,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:23:54,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:23:54,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:23:54,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:23:54,111 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:23:54,111 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:23:54,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:23:54,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:23:54,111 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_a07ec936-8bcb-4b42-8175-b101abf216f8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2021-12-06 19:23:54,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:23:54,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:23:54,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:23:54,309 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:23:54,310 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:23:54,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-12-06 19:23:54,358 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/data/08234fed1/90a48ca471074076b3edf90547146408/FLAG6a6c534f9 [2021-12-06 19:23:54,715 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:23:54,715 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-12-06 19:23:54,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/data/08234fed1/90a48ca471074076b3edf90547146408/FLAG6a6c534f9 [2021-12-06 19:23:54,730 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/data/08234fed1/90a48ca471074076b3edf90547146408 [2021-12-06 19:23:54,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:23:54,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:23:54,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:23:54,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:23:54,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:23:54,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:54,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60090588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54, skipping insertion in model container [2021-12-06 19:23:54,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:54,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:23:54,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:23:54,902 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_a07ec936-8bcb-4b42-8175-b101abf216f8/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2021-12-06 19:23:54,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:23:54,913 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:23:54,934 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_a07ec936-8bcb-4b42-8175-b101abf216f8/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2021-12-06 19:23:54,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:23:54,949 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:23:54,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54 WrapperNode [2021-12-06 19:23:54,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:23:54,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:23:54,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:23:54,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:23:54,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:54,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:54,983 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-12-06 19:23:54,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:23:54,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:23:54,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:23:54,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:23:54,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:54,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:54,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:54,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:55,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:55,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:55,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:55,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:23:55,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:23:55,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:23:55,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:23:55,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (1/1) ... [2021-12-06 19:23:55,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:23:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:23:55,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:23:55,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:23:55,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:23:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 19:23:55,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 19:23:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 19:23:55,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 19:23:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-06 19:23:55,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-06 19:23:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:23:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:23:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:23:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 19:23:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 19:23:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:23:55,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:23:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:23:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:23:55,080 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 19:23:55,150 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:23:55,152 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:23:55,277 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:23:55,312 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:23:55,312 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 19:23:55,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:23:55 BoogieIcfgContainer [2021-12-06 19:23:55,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:23:55,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:23:55,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:23:55,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:23:55,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:23:54" (1/3) ... [2021-12-06 19:23:55,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759452c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:23:55, skipping insertion in model container [2021-12-06 19:23:55,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:23:54" (2/3) ... [2021-12-06 19:23:55,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759452c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:23:55, skipping insertion in model container [2021-12-06 19:23:55,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:23:55" (3/3) ... [2021-12-06 19:23:55,320 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2021-12-06 19:23:55,324 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 19:23:55,324 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:23:55,325 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:23:55,325 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 19:23:55,348 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,349 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,349 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,349 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,349 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,349 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,350 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,351 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,351 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,351 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,351 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,352 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,352 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,352 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,352 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,352 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,353 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,353 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,353 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,353 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,353 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,354 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,354 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,354 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,354 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,355 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,355 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,355 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,355 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,357 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,358 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,358 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,358 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,359 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,359 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,359 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,360 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,360 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,360 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 19:23:55,364 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-06 19:23:55,400 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:23:55,405 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 19:23:55,405 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-06 19:23:55,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2021-12-06 19:23:55,451 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-12-06 19:23:55,451 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-06 19:23:55,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2021-12-06 19:23:55,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2021-12-06 19:23:55,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2021-12-06 19:23:55,476 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2021-12-06 19:23:55,476 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-06 19:23:55,476 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:23:55,477 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] [2021-12-06 19:23:55,477 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:23:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:23:55,481 INFO L85 PathProgramCache]: Analyzing trace with hash 64157928, now seen corresponding path program 1 times [2021-12-06 19:23:55,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:23:55,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169246653] [2021-12-06 19:23:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:55,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:23:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:55,640 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 19:23:55,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:23:55,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169246653] [2021-12-06 19:23:55,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169246653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:23:55,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:23:55,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:23:55,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964791766] [2021-12-06 19:23:55,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:23:55,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:23:55,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:23:55,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:23:55,671 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2021-12-06 19:23:55,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:55,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:23:55,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2021-12-06 19:23:55,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:23:55,729 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2021-12-06 19:23:55,729 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2021-12-06 19:23:55,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 246 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2021-12-06 19:23:55,733 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2021-12-06 19:23:55,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2021-12-06 19:23:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:23:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 19:23:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2021-12-06 19:23:55,744 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2021-12-06 19:23:55,744 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2021-12-06 19:23:55,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2021-12-06 19:23:55,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:23:55,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2021-12-06 19:23:55,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:55,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:55,756 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:55,757 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2021-12-06 19:23:55,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2021-12-06 19:23:55,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-06 19:23:55,763 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2021-12-06 19:23:55,764 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2021-12-06 19:23:55,767 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2021-12-06 19:23:55,767 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2021-12-06 19:23:55,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:55,768 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:23:55,768 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] [2021-12-06 19:23:55,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:23:55,768 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:23:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:23:55,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1292779301, now seen corresponding path program 1 times [2021-12-06 19:23:55,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:23:55,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431026304] [2021-12-06 19:23:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:55,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:23:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:55,957 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 19:23:55,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:23:55,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431026304] [2021-12-06 19:23:55,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431026304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:23:55,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:23:55,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:23:55,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106923049] [2021-12-06 19:23:55,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:23:55,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:23:55,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:55,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:23:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:23:55,963 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2021-12-06 19:23:55,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:55,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:23:55,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2021-12-06 19:23:55,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:23:56,059 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2021-12-06 19:23:56,059 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2021-12-06 19:23:56,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2021-12-06 19:23:56,062 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2021-12-06 19:23:56,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2021-12-06 19:23:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:23:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:23:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2021-12-06 19:23:56,068 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2021-12-06 19:23:56,068 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2021-12-06 19:23:56,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2021-12-06 19:23:56,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:23:56,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2021-12-06 19:23:56,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,084 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,084 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2021-12-06 19:23:56,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2021-12-06 19:23:56,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 19:23:56,087 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2021-12-06 19:23:56,087 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2021-12-06 19:23:56,088 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2021-12-06 19:23:56,088 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2021-12-06 19:23:56,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,089 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:23:56,089 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] [2021-12-06 19:23:56,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:23:56,089 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:23:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:23:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2021-12-06 19:23:56,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:23:56,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062586665] [2021-12-06 19:23:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:56,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:23:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:56,326 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 19:23:56,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:23:56,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062586665] [2021-12-06 19:23:56,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062586665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:23:56,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:23:56,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:23:56,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845987926] [2021-12-06 19:23:56,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:23:56,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:23:56,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:23:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:23:56,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-06 19:23:56,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:23:56,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-06 19:23:56,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:23:56,619 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2021-12-06 19:23:56,619 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2021-12-06 19:23:56,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4079 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2021-12-06 19:23:56,630 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2021-12-06 19:23:56,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2021-12-06 19:23:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:23:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 19:23:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2021-12-06 19:23:56,634 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2021-12-06 19:23:56,634 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2021-12-06 19:23:56,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2021-12-06 19:23:56,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:23:56,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2021-12-06 19:23:56,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,642 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,642 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2021-12-06 19:23:56,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2021-12-06 19:23:56,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-06 19:23:56,649 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2021-12-06 19:23:56,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2021-12-06 19:23:56,650 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2021-12-06 19:23:56,650 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2021-12-06 19:23:56,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,651 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:23:56,651 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] [2021-12-06 19:23:56,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:23:56,652 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:23:56,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:23:56,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1540254679, now seen corresponding path program 2 times [2021-12-06 19:23:56,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:23:56,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424163153] [2021-12-06 19:23:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:56,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:23:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:56,745 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 19:23:56,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:23:56,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424163153] [2021-12-06 19:23:56,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424163153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:23:56,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:23:56,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:23:56,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403863622] [2021-12-06 19:23:56,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:23:56,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:23:56,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:56,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:23:56,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:23:56,747 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-06 19:23:56,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:23:56,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-06 19:23:56,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:23:56,908 INFO L129 PetriNetUnfolder]: 371/890 cut-off events. [2021-12-06 19:23:56,908 INFO L130 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2021-12-06 19:23:56,911 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4800 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2021-12-06 19:23:56,918 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2021-12-06 19:23:56,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2021-12-06 19:23:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:23:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:23:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2021-12-06 19:23:56,921 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-12-06 19:23:56,921 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2021-12-06 19:23:56,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2021-12-06 19:23:56,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:23:56,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2021-12-06 19:23:56,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,926 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2021-12-06 19:23:56,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2021-12-06 19:23:56,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-06 19:23:56,935 INFO L242 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2021-12-06 19:23:56,935 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2021-12-06 19:23:56,936 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2021-12-06 19:23:56,936 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2021-12-06 19:23:56,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:56,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:23:56,937 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] [2021-12-06 19:23:56,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:23:56,937 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:23:56,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:23:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1923841693, now seen corresponding path program 3 times [2021-12-06 19:23:56,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:23:56,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878440056] [2021-12-06 19:23:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:56,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:23:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:57,066 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 19:23:57,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:23:57,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878440056] [2021-12-06 19:23:57,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878440056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:23:57,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:23:57,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:23:57,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948991447] [2021-12-06 19:23:57,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:23:57,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:23:57,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:57,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:23:57,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:23:57,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-06 19:23:57,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:23:57,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-06 19:23:57,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:23:57,407 INFO L129 PetriNetUnfolder]: 576/1343 cut-off events. [2021-12-06 19:23:57,407 INFO L130 PetriNetUnfolder]: For 998/1044 co-relation queries the response was YES. [2021-12-06 19:23:57,412 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3285 conditions, 1343 events. 576/1343 cut-off events. For 998/1044 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8163 event pairs, 89 based on Foata normal form. 19/1294 useless extension candidates. Maximal degree in co-relation 3269. Up to 389 conditions per place. [2021-12-06 19:23:57,421 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2021-12-06 19:23:57,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2021-12-06 19:23:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:23:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-06 19:23:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2021-12-06 19:23:57,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2021-12-06 19:23:57,425 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2021-12-06 19:23:57,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2021-12-06 19:23:57,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:23:57,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2021-12-06 19:23:57,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,431 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,431 INFO L186 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2021-12-06 19:23:57,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2021-12-06 19:23:57,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-12-06 19:23:57,440 INFO L242 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2021-12-06 19:23:57,441 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2021-12-06 19:23:57,442 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2021-12-06 19:23:57,442 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2021-12-06 19:23:57,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,442 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:23:57,443 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] [2021-12-06 19:23:57,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:23:57,443 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:23:57,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:23:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash 982794509, now seen corresponding path program 4 times [2021-12-06 19:23:57,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:23:57,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866052808] [2021-12-06 19:23:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:57,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:23:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:57,530 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 19:23:57,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:23:57,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866052808] [2021-12-06 19:23:57,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866052808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:23:57,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:23:57,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:23:57,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63123555] [2021-12-06 19:23:57,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:23:57,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:23:57,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:57,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:23:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:23:57,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-06 19:23:57,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:23:57,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-06 19:23:57,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:23:57,788 INFO L129 PetriNetUnfolder]: 594/1397 cut-off events. [2021-12-06 19:23:57,789 INFO L130 PetriNetUnfolder]: For 2230/2243 co-relation queries the response was YES. [2021-12-06 19:23:57,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3953 conditions, 1397 events. 594/1397 cut-off events. For 2230/2243 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8647 event pairs, 153 based on Foata normal form. 16/1310 useless extension candidates. Maximal degree in co-relation 3932. Up to 527 conditions per place. [2021-12-06 19:23:57,803 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2021-12-06 19:23:57,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2021-12-06 19:23:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:23:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 19:23:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2021-12-06 19:23:57,805 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2021-12-06 19:23:57,805 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2021-12-06 19:23:57,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2021-12-06 19:23:57,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:23:57,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2021-12-06 19:23:57,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,809 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,809 INFO L186 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2021-12-06 19:23:57,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2021-12-06 19:23:57,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-12-06 19:23:57,820 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2021-12-06 19:23:57,821 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2021-12-06 19:23:57,821 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2021-12-06 19:23:57,821 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2021-12-06 19:23:57,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:23:57,822 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] [2021-12-06 19:23:57,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:23:57,822 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:23:57,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:23:57,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1775458840, now seen corresponding path program 1 times [2021-12-06 19:23:57,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:23:57,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201339402] [2021-12-06 19:23:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:57,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:23:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:57,885 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 19:23:57,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:23:57,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201339402] [2021-12-06 19:23:57,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201339402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:23:57,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:23:57,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:23:57,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356802675] [2021-12-06 19:23:57,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:23:57,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:23:57,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:23:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:23:57,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-06 19:23:57,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:57,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:23:57,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-06 19:23:57,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:23:58,161 INFO L129 PetriNetUnfolder]: 836/1929 cut-off events. [2021-12-06 19:23:58,161 INFO L130 PetriNetUnfolder]: For 3921/4121 co-relation queries the response was YES. [2021-12-06 19:23:58,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5970 conditions, 1929 events. 836/1929 cut-off events. For 3921/4121 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13026 event pairs, 166 based on Foata normal form. 81/1833 useless extension candidates. Maximal degree in co-relation 5945. Up to 719 conditions per place. [2021-12-06 19:23:58,180 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 49 selfloop transitions, 41 changer transitions 0/156 dead transitions. [2021-12-06 19:23:58,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 156 transitions, 1099 flow [2021-12-06 19:23:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:23:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:23:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2021-12-06 19:23:58,182 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2021-12-06 19:23:58,182 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2021-12-06 19:23:58,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2021-12-06 19:23:58,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:23:58,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2021-12-06 19:23:58,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:58,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:58,185 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:58,185 INFO L186 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 6 states and 486 transitions. [2021-12-06 19:23:58,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 156 transitions, 1099 flow [2021-12-06 19:23:58,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 156 transitions, 1035 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-06 19:23:58,200 INFO L242 Difference]: Finished difference. Result has 127 places, 133 transitions, 920 flow [2021-12-06 19:23:58,200 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=920, PETRI_PLACES=127, PETRI_TRANSITIONS=133} [2021-12-06 19:23:58,201 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 41 predicate places. [2021-12-06 19:23:58,201 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 133 transitions, 920 flow [2021-12-06 19:23:58,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:58,201 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:23:58,201 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] [2021-12-06 19:23:58,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:23:58,201 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:23:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:23:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2079569762, now seen corresponding path program 2 times [2021-12-06 19:23:58,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:23:58,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168547367] [2021-12-06 19:23:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:58,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:23:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:58,265 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 19:23:58,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:23:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168547367] [2021-12-06 19:23:58,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168547367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:23:58,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:23:58,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:23:58,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966052507] [2021-12-06 19:23:58,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:23:58,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:23:58,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:58,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:23:58,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:23:58,266 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-06 19:23:58,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 133 transitions, 920 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:58,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:23:58,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-06 19:23:58,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:23:58,682 INFO L129 PetriNetUnfolder]: 1035/2391 cut-off events. [2021-12-06 19:23:58,682 INFO L130 PetriNetUnfolder]: For 7432/7630 co-relation queries the response was YES. [2021-12-06 19:23:58,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8472 conditions, 2391 events. 1035/2391 cut-off events. For 7432/7630 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17374 event pairs, 79 based on Foata normal form. 88/2386 useless extension candidates. Maximal degree in co-relation 8444. Up to 761 conditions per place. [2021-12-06 19:23:58,714 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 110 selfloop transitions, 77 changer transitions 2/255 dead transitions. [2021-12-06 19:23:58,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 255 transitions, 2694 flow [2021-12-06 19:23:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:23:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:23:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 491 transitions. [2021-12-06 19:23:58,717 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8436426116838488 [2021-12-06 19:23:58,717 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 491 transitions. [2021-12-06 19:23:58,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 491 transitions. [2021-12-06 19:23:58,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:23:58,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 491 transitions. [2021-12-06 19:23:58,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.83333333333333) internal successors, (491), 6 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:58,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:58,721 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:58,721 INFO L186 Difference]: Start difference. First operand has 127 places, 133 transitions, 920 flow. Second operand 6 states and 491 transitions. [2021-12-06 19:23:58,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 255 transitions, 2694 flow [2021-12-06 19:23:58,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 255 transitions, 2550 flow, removed 15 selfloop flow, removed 2 redundant places. [2021-12-06 19:23:58,756 INFO L242 Difference]: Finished difference. Result has 134 places, 191 transitions, 1867 flow [2021-12-06 19:23:58,756 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1867, PETRI_PLACES=134, PETRI_TRANSITIONS=191} [2021-12-06 19:23:58,757 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2021-12-06 19:23:58,757 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 191 transitions, 1867 flow [2021-12-06 19:23:58,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:58,758 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:23:58,758 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] [2021-12-06 19:23:58,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:23:58,758 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:23:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:23:58,759 INFO L85 PathProgramCache]: Analyzing trace with hash 910401936, now seen corresponding path program 1 times [2021-12-06 19:23:58,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:23:58,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32789060] [2021-12-06 19:23:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:58,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:23:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:23:58,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:23:58,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32789060] [2021-12-06 19:23:58,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32789060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:23:58,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915556771] [2021-12-06 19:23:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:23:58,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:23:58,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:23:58,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:23:58,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:23:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:23:58,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 19:23:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:23:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:23:59,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:23:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:23:59,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915556771] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:23:59,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:23:59,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2021-12-06 19:23:59,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059820686] [2021-12-06 19:23:59,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:23:59,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 19:23:59,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:23:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 19:23:59,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:23:59,912 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-12-06 19:23:59,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 191 transitions, 1867 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:23:59,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:23:59,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-12-06 19:23:59,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:00,733 INFO L129 PetriNetUnfolder]: 1552/3642 cut-off events. [2021-12-06 19:24:00,733 INFO L130 PetriNetUnfolder]: For 14155/14167 co-relation queries the response was YES. [2021-12-06 19:24:00,751 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14532 conditions, 3642 events. 1552/3642 cut-off events. For 14155/14167 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 28403 event pairs, 129 based on Foata normal form. 61/3634 useless extension candidates. Maximal degree in co-relation 14500. Up to 815 conditions per place. [2021-12-06 19:24:00,774 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 209 selfloop transitions, 113 changer transitions 10/384 dead transitions. [2021-12-06 19:24:00,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 384 transitions, 4307 flow [2021-12-06 19:24:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:24:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-06 19:24:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2021-12-06 19:24:00,777 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7484536082474227 [2021-12-06 19:24:00,777 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2021-12-06 19:24:00,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2021-12-06 19:24:00,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:00,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2021-12-06 19:24:00,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.6) internal successors, (1089), 15 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:00,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:00,783 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:00,783 INFO L186 Difference]: Start difference. First operand has 134 places, 191 transitions, 1867 flow. Second operand 15 states and 1089 transitions. [2021-12-06 19:24:00,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 384 transitions, 4307 flow [2021-12-06 19:24:00,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 384 transitions, 4275 flow, removed 16 selfloop flow, removed 0 redundant places. [2021-12-06 19:24:00,818 INFO L242 Difference]: Finished difference. Result has 155 places, 234 transitions, 2694 flow [2021-12-06 19:24:00,819 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2694, PETRI_PLACES=155, PETRI_TRANSITIONS=234} [2021-12-06 19:24:00,819 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 69 predicate places. [2021-12-06 19:24:00,819 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 234 transitions, 2694 flow [2021-12-06 19:24:00,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:00,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:00,820 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] [2021-12-06 19:24:00,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:24:01,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:01,021 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1946248222, now seen corresponding path program 2 times [2021-12-06 19:24:01,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:01,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921787727] [2021-12-06 19:24:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:01,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:01,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:01,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921787727] [2021-12-06 19:24:01,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921787727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:24:01,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192758443] [2021-12-06 19:24:01,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:24:01,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:01,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:24:01,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:24:01,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:24:01,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:24:01,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:24:01,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 19:24:01,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:24:01,430 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 19:24:01,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:24:01,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192758443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:01,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:24:01,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-12-06 19:24:01,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224864449] [2021-12-06 19:24:01,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:01,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:24:01,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:24:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:24:01,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-06 19:24:01,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 234 transitions, 2694 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:01,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:01,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-06 19:24:01,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:02,317 INFO L129 PetriNetUnfolder]: 2686/5763 cut-off events. [2021-12-06 19:24:02,317 INFO L130 PetriNetUnfolder]: For 27474/27474 co-relation queries the response was YES. [2021-12-06 19:24:02,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25015 conditions, 5763 events. 2686/5763 cut-off events. For 27474/27474 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 47735 event pairs, 879 based on Foata normal form. 19/5658 useless extension candidates. Maximal degree in co-relation 24975. Up to 3916 conditions per place. [2021-12-06 19:24:02,367 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 187 selfloop transitions, 82 changer transitions 7/331 dead transitions. [2021-12-06 19:24:02,368 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 331 transitions, 4349 flow [2021-12-06 19:24:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:24:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 19:24:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 642 transitions. [2021-12-06 19:24:02,370 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273195876288659 [2021-12-06 19:24:02,370 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 642 transitions. [2021-12-06 19:24:02,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 642 transitions. [2021-12-06 19:24:02,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:02,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 642 transitions. [2021-12-06 19:24:02,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.25) internal successors, (642), 8 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:02,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:02,373 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:02,373 INFO L186 Difference]: Start difference. First operand has 155 places, 234 transitions, 2694 flow. Second operand 8 states and 642 transitions. [2021-12-06 19:24:02,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 331 transitions, 4349 flow [2021-12-06 19:24:02,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 331 transitions, 4185 flow, removed 33 selfloop flow, removed 5 redundant places. [2021-12-06 19:24:02,445 INFO L242 Difference]: Finished difference. Result has 161 places, 277 transitions, 3611 flow [2021-12-06 19:24:02,445 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3611, PETRI_PLACES=161, PETRI_TRANSITIONS=277} [2021-12-06 19:24:02,446 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 75 predicate places. [2021-12-06 19:24:02,446 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 277 transitions, 3611 flow [2021-12-06 19:24:02,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:02,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:02,446 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] [2021-12-06 19:24:02,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:24:02,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:24:02,648 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:02,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 420816146, now seen corresponding path program 3 times [2021-12-06 19:24:02,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:02,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781436411] [2021-12-06 19:24:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:02,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:02,779 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 19:24:02,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:02,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781436411] [2021-12-06 19:24:02,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781436411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:02,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:02,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:24:02,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082459790] [2021-12-06 19:24:02,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:02,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:24:02,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:24:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:24:02,782 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-06 19:24:02,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 277 transitions, 3611 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:02,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:02,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-06 19:24:02,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:03,675 INFO L129 PetriNetUnfolder]: 2687/5778 cut-off events. [2021-12-06 19:24:03,675 INFO L130 PetriNetUnfolder]: For 31462/31523 co-relation queries the response was YES. [2021-12-06 19:24:03,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26270 conditions, 5778 events. 2687/5778 cut-off events. For 31462/31523 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 47693 event pairs, 912 based on Foata normal form. 14/5659 useless extension candidates. Maximal degree in co-relation 26226. Up to 3995 conditions per place. [2021-12-06 19:24:03,734 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 170 selfloop transitions, 75 changer transitions 1/301 dead transitions. [2021-12-06 19:24:03,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 301 transitions, 4278 flow [2021-12-06 19:24:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:24:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 19:24:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2021-12-06 19:24:03,736 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8309278350515464 [2021-12-06 19:24:03,736 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2021-12-06 19:24:03,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2021-12-06 19:24:03,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:03,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2021-12-06 19:24:03,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:03,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:03,739 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:03,739 INFO L186 Difference]: Start difference. First operand has 161 places, 277 transitions, 3611 flow. Second operand 5 states and 403 transitions. [2021-12-06 19:24:03,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 301 transitions, 4278 flow [2021-12-06 19:24:03,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 301 transitions, 4227 flow, removed 15 selfloop flow, removed 1 redundant places. [2021-12-06 19:24:03,823 INFO L242 Difference]: Finished difference. Result has 166 places, 279 transitions, 3830 flow [2021-12-06 19:24:03,823 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3830, PETRI_PLACES=166, PETRI_TRANSITIONS=279} [2021-12-06 19:24:03,824 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 80 predicate places. [2021-12-06 19:24:03,824 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 279 transitions, 3830 flow [2021-12-06 19:24:03,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:03,824 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:03,824 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] [2021-12-06 19:24:03,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 19:24:03,825 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1047666514, now seen corresponding path program 3 times [2021-12-06 19:24:03,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:03,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456980549] [2021-12-06 19:24:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:03,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:03,915 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 19:24:03,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:03,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456980549] [2021-12-06 19:24:03,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456980549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:03,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:03,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:24:03,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698385791] [2021-12-06 19:24:03,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:03,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:24:03,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:03,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:24:03,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:24:03,917 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-06 19:24:03,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 279 transitions, 3830 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:03,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:03,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-06 19:24:03,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:04,673 INFO L129 PetriNetUnfolder]: 2284/5583 cut-off events. [2021-12-06 19:24:04,673 INFO L130 PetriNetUnfolder]: For 31662/32237 co-relation queries the response was YES. [2021-12-06 19:24:04,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24963 conditions, 5583 events. 2284/5583 cut-off events. For 31662/32237 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 50053 event pairs, 275 based on Foata normal form. 116/5561 useless extension candidates. Maximal degree in co-relation 24917. Up to 2058 conditions per place. [2021-12-06 19:24:04,723 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 103 selfloop transitions, 205 changer transitions 2/384 dead transitions. [2021-12-06 19:24:04,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 384 transitions, 5631 flow [2021-12-06 19:24:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:24:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:24:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 497 transitions. [2021-12-06 19:24:04,725 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539518900343642 [2021-12-06 19:24:04,725 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 497 transitions. [2021-12-06 19:24:04,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 497 transitions. [2021-12-06 19:24:04,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:04,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 497 transitions. [2021-12-06 19:24:04,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:04,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:04,748 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:04,748 INFO L186 Difference]: Start difference. First operand has 166 places, 279 transitions, 3830 flow. Second operand 6 states and 497 transitions. [2021-12-06 19:24:04,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 384 transitions, 5631 flow [2021-12-06 19:24:04,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 384 transitions, 5550 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 19:24:04,839 INFO L242 Difference]: Finished difference. Result has 172 places, 341 transitions, 5168 flow [2021-12-06 19:24:04,840 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3755, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5168, PETRI_PLACES=172, PETRI_TRANSITIONS=341} [2021-12-06 19:24:04,841 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 86 predicate places. [2021-12-06 19:24:04,841 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 341 transitions, 5168 flow [2021-12-06 19:24:04,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:04,841 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:04,841 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] [2021-12-06 19:24:04,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 19:24:04,841 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2069978114, now seen corresponding path program 4 times [2021-12-06 19:24:04,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:04,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666813998] [2021-12-06 19:24:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:04,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:04,940 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 19:24:04,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:04,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666813998] [2021-12-06 19:24:04,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666813998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:04,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:04,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:24:04,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127157795] [2021-12-06 19:24:04,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:04,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:24:04,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:04,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:24:04,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:24:04,942 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-06 19:24:04,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 341 transitions, 5168 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:04,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:04,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-06 19:24:04,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:05,850 INFO L129 PetriNetUnfolder]: 2223/5508 cut-off events. [2021-12-06 19:24:05,850 INFO L130 PetriNetUnfolder]: For 40337/40928 co-relation queries the response was YES. [2021-12-06 19:24:05,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26842 conditions, 5508 events. 2223/5508 cut-off events. For 40337/40928 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 49593 event pairs, 312 based on Foata normal form. 104/5456 useless extension candidates. Maximal degree in co-relation 26793. Up to 1996 conditions per place. [2021-12-06 19:24:05,903 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 95 selfloop transitions, 196 changer transitions 5/370 dead transitions. [2021-12-06 19:24:05,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 370 transitions, 5942 flow [2021-12-06 19:24:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:24:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 19:24:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2021-12-06 19:24:05,905 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577319587628865 [2021-12-06 19:24:05,905 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2021-12-06 19:24:05,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2021-12-06 19:24:05,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:05,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2021-12-06 19:24:05,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:05,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:05,907 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:05,908 INFO L186 Difference]: Start difference. First operand has 172 places, 341 transitions, 5168 flow. Second operand 5 states and 416 transitions. [2021-12-06 19:24:05,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 370 transitions, 5942 flow [2021-12-06 19:24:06,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 370 transitions, 5920 flow, removed 11 selfloop flow, removed 0 redundant places. [2021-12-06 19:24:06,024 INFO L242 Difference]: Finished difference. Result has 178 places, 337 transitions, 5520 flow [2021-12-06 19:24:06,024 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5094, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5520, PETRI_PLACES=178, PETRI_TRANSITIONS=337} [2021-12-06 19:24:06,025 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 92 predicate places. [2021-12-06 19:24:06,025 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 337 transitions, 5520 flow [2021-12-06 19:24:06,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:06,025 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:06,025 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] [2021-12-06 19:24:06,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:24:06,026 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:06,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:06,026 INFO L85 PathProgramCache]: Analyzing trace with hash -323846866, now seen corresponding path program 5 times [2021-12-06 19:24:06,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:06,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969127597] [2021-12-06 19:24:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:06,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:06,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:06,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969127597] [2021-12-06 19:24:06,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969127597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:24:06,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873522966] [2021-12-06 19:24:06,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:24:06,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:24:06,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:24:06,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:24:06,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:24:06,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:24:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:24:06,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:24:06,449 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 19:24:06,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:24:06,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873522966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:06,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:24:06,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-06 19:24:06,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974835058] [2021-12-06 19:24:06,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:06,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:24:06,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:24:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:24:06,451 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-06 19:24:06,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 337 transitions, 5520 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:06,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:06,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-06 19:24:06,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:07,614 INFO L129 PetriNetUnfolder]: 3311/7084 cut-off events. [2021-12-06 19:24:07,614 INFO L130 PetriNetUnfolder]: For 62440/62440 co-relation queries the response was YES. [2021-12-06 19:24:07,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37153 conditions, 7084 events. 3311/7084 cut-off events. For 62440/62440 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 60844 event pairs, 918 based on Foata normal form. 39/7004 useless extension candidates. Maximal degree in co-relation 37101. Up to 4838 conditions per place. [2021-12-06 19:24:07,682 INFO L132 encePairwiseOnDemand]: 86/97 looper letters, 245 selfloop transitions, 102 changer transitions 5/407 dead transitions. [2021-12-06 19:24:07,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 407 transitions, 7020 flow [2021-12-06 19:24:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:24:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-06 19:24:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 712 transitions. [2021-12-06 19:24:07,685 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8155784650630011 [2021-12-06 19:24:07,685 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 712 transitions. [2021-12-06 19:24:07,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 712 transitions. [2021-12-06 19:24:07,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:07,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 712 transitions. [2021-12-06 19:24:07,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.11111111111111) internal successors, (712), 9 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:07,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:07,688 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:07,688 INFO L186 Difference]: Start difference. First operand has 178 places, 337 transitions, 5520 flow. Second operand 9 states and 712 transitions. [2021-12-06 19:24:07,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 407 transitions, 7020 flow [2021-12-06 19:24:07,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 407 transitions, 6642 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-12-06 19:24:07,843 INFO L242 Difference]: Finished difference. Result has 188 places, 361 transitions, 5838 flow [2021-12-06 19:24:07,843 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5170, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5838, PETRI_PLACES=188, PETRI_TRANSITIONS=361} [2021-12-06 19:24:07,843 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 102 predicate places. [2021-12-06 19:24:07,843 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 361 transitions, 5838 flow [2021-12-06 19:24:07,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:07,844 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:07,844 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] [2021-12-06 19:24:07,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:24:08,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 19:24:08,045 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:08,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2109149388, now seen corresponding path program 4 times [2021-12-06 19:24:08,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:08,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204775515] [2021-12-06 19:24:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:08,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:08,113 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 19:24:08,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:08,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204775515] [2021-12-06 19:24:08,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204775515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:08,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:08,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:24:08,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891058249] [2021-12-06 19:24:08,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:08,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:24:08,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:24:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:24:08,115 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-06 19:24:08,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 361 transitions, 5838 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:08,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:08,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-06 19:24:08,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:08,987 INFO L129 PetriNetUnfolder]: 2070/5016 cut-off events. [2021-12-06 19:24:08,987 INFO L130 PetriNetUnfolder]: For 46316/46383 co-relation queries the response was YES. [2021-12-06 19:24:09,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26752 conditions, 5016 events. 2070/5016 cut-off events. For 46316/46383 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 43411 event pairs, 590 based on Foata normal form. 23/4904 useless extension candidates. Maximal degree in co-relation 26696. Up to 3078 conditions per place. [2021-12-06 19:24:09,051 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 263 selfloop transitions, 60 changer transitions 6/391 dead transitions. [2021-12-06 19:24:09,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 391 transitions, 6706 flow [2021-12-06 19:24:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:24:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:24:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2021-12-06 19:24:09,054 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2021-12-06 19:24:09,054 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2021-12-06 19:24:09,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2021-12-06 19:24:09,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:09,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2021-12-06 19:24:09,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:09,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:09,058 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:09,058 INFO L186 Difference]: Start difference. First operand has 188 places, 361 transitions, 5838 flow. Second operand 6 states and 476 transitions. [2021-12-06 19:24:09,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 391 transitions, 6706 flow [2021-12-06 19:24:09,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 391 transitions, 6545 flow, removed 42 selfloop flow, removed 2 redundant places. [2021-12-06 19:24:09,182 INFO L242 Difference]: Finished difference. Result has 194 places, 352 transitions, 5611 flow [2021-12-06 19:24:09,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5430, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5611, PETRI_PLACES=194, PETRI_TRANSITIONS=352} [2021-12-06 19:24:09,183 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 108 predicate places. [2021-12-06 19:24:09,183 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 352 transitions, 5611 flow [2021-12-06 19:24:09,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:09,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:09,183 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] [2021-12-06 19:24:09,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 19:24:09,184 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash -851652646, now seen corresponding path program 6 times [2021-12-06 19:24:09,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:09,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327145244] [2021-12-06 19:24:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:09,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:09,270 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 19:24:09,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:09,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327145244] [2021-12-06 19:24:09,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327145244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:09,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:09,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:24:09,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867354825] [2021-12-06 19:24:09,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:09,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:24:09,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:09,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:24:09,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:24:09,273 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-06 19:24:09,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 352 transitions, 5611 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:09,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:09,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-06 19:24:09,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:10,247 INFO L129 PetriNetUnfolder]: 2328/5441 cut-off events. [2021-12-06 19:24:10,247 INFO L130 PetriNetUnfolder]: For 47390/47962 co-relation queries the response was YES. [2021-12-06 19:24:10,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28578 conditions, 5441 events. 2328/5441 cut-off events. For 47390/47962 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 47246 event pairs, 234 based on Foata normal form. 115/5418 useless extension candidates. Maximal degree in co-relation 28518. Up to 1806 conditions per place. [2021-12-06 19:24:10,305 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 146 selfloop transitions, 184 changer transitions 4/406 dead transitions. [2021-12-06 19:24:10,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 406 transitions, 6924 flow [2021-12-06 19:24:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:24:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 19:24:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2021-12-06 19:24:10,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577319587628865 [2021-12-06 19:24:10,307 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2021-12-06 19:24:10,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2021-12-06 19:24:10,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:10,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2021-12-06 19:24:10,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:10,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:10,309 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:10,309 INFO L186 Difference]: Start difference. First operand has 194 places, 352 transitions, 5611 flow. Second operand 5 states and 416 transitions. [2021-12-06 19:24:10,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 406 transitions, 6924 flow [2021-12-06 19:24:10,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 406 transitions, 6774 flow, removed 17 selfloop flow, removed 4 redundant places. [2021-12-06 19:24:10,445 INFO L242 Difference]: Finished difference. Result has 197 places, 368 transitions, 6391 flow [2021-12-06 19:24:10,445 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5452, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6391, PETRI_PLACES=197, PETRI_TRANSITIONS=368} [2021-12-06 19:24:10,446 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 111 predicate places. [2021-12-06 19:24:10,446 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 368 transitions, 6391 flow [2021-12-06 19:24:10,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:10,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:10,446 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] [2021-12-06 19:24:10,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 19:24:10,446 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:10,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1895057346, now seen corresponding path program 7 times [2021-12-06 19:24:10,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:10,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018523215] [2021-12-06 19:24:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:10,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:10,525 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 19:24:10,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:10,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018523215] [2021-12-06 19:24:10,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018523215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:10,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:10,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:24:10,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461724435] [2021-12-06 19:24:10,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:10,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:24:10,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:10,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:24:10,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:24:10,526 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-06 19:24:10,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 368 transitions, 6391 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:10,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:10,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-06 19:24:10,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:11,611 INFO L129 PetriNetUnfolder]: 2702/5969 cut-off events. [2021-12-06 19:24:11,611 INFO L130 PetriNetUnfolder]: For 63549/63683 co-relation queries the response was YES. [2021-12-06 19:24:11,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33584 conditions, 5969 events. 2702/5969 cut-off events. For 63549/63683 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50943 event pairs, 709 based on Foata normal form. 43/5853 useless extension candidates. Maximal degree in co-relation 33523. Up to 4099 conditions per place. [2021-12-06 19:24:11,674 INFO L132 encePairwiseOnDemand]: 90/97 looper letters, 246 selfloop transitions, 66 changer transitions 1/384 dead transitions. [2021-12-06 19:24:11,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 384 transitions, 7159 flow [2021-12-06 19:24:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:24:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 19:24:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 399 transitions. [2021-12-06 19:24:11,676 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.822680412371134 [2021-12-06 19:24:11,676 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 399 transitions. [2021-12-06 19:24:11,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 399 transitions. [2021-12-06 19:24:11,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:11,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 399 transitions. [2021-12-06 19:24:11,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:11,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:11,678 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:11,678 INFO L186 Difference]: Start difference. First operand has 197 places, 368 transitions, 6391 flow. Second operand 5 states and 399 transitions. [2021-12-06 19:24:11,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 384 transitions, 7159 flow [2021-12-06 19:24:11,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 384 transitions, 6755 flow, removed 13 selfloop flow, removed 7 redundant places. [2021-12-06 19:24:11,807 INFO L242 Difference]: Finished difference. Result has 195 places, 371 transitions, 6243 flow [2021-12-06 19:24:11,807 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5958, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6243, PETRI_PLACES=195, PETRI_TRANSITIONS=371} [2021-12-06 19:24:11,807 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 109 predicate places. [2021-12-06 19:24:11,808 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 371 transitions, 6243 flow [2021-12-06 19:24:11,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:11,808 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:11,808 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] [2021-12-06 19:24:11,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 19:24:11,808 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:11,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash -393230950, now seen corresponding path program 8 times [2021-12-06 19:24:11,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:11,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809020210] [2021-12-06 19:24:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:11,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:11,851 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 19:24:11,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:11,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809020210] [2021-12-06 19:24:11,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809020210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:11,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:11,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:24:11,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259836178] [2021-12-06 19:24:11,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:11,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:24:11,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:11,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:24:11,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:24:11,852 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-06 19:24:11,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 371 transitions, 6243 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:11,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:11,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-06 19:24:11,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:12,780 INFO L129 PetriNetUnfolder]: 2681/5880 cut-off events. [2021-12-06 19:24:12,780 INFO L130 PetriNetUnfolder]: For 61198/61325 co-relation queries the response was YES. [2021-12-06 19:24:12,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32544 conditions, 5880 events. 2681/5880 cut-off events. For 61198/61325 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49553 event pairs, 719 based on Foata normal form. 46/5771 useless extension candidates. Maximal degree in co-relation 32486. Up to 4005 conditions per place. [2021-12-06 19:24:12,849 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 251 selfloop transitions, 63 changer transitions 3/388 dead transitions. [2021-12-06 19:24:12,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 388 transitions, 7032 flow [2021-12-06 19:24:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:24:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:24:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2021-12-06 19:24:12,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8092783505154639 [2021-12-06 19:24:12,850 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 471 transitions. [2021-12-06 19:24:12,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 471 transitions. [2021-12-06 19:24:12,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:12,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 471 transitions. [2021-12-06 19:24:12,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.5) internal successors, (471), 6 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:12,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:12,852 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:12,852 INFO L186 Difference]: Start difference. First operand has 195 places, 371 transitions, 6243 flow. Second operand 6 states and 471 transitions. [2021-12-06 19:24:12,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 388 transitions, 7032 flow [2021-12-06 19:24:12,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 388 transitions, 6899 flow, removed 7 selfloop flow, removed 3 redundant places. [2021-12-06 19:24:13,005 INFO L242 Difference]: Finished difference. Result has 197 places, 375 transitions, 6322 flow [2021-12-06 19:24:13,006 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6322, PETRI_PLACES=197, PETRI_TRANSITIONS=375} [2021-12-06 19:24:13,006 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 111 predicate places. [2021-12-06 19:24:13,006 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 375 transitions, 6322 flow [2021-12-06 19:24:13,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:13,007 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:13,007 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] [2021-12-06 19:24:13,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 19:24:13,007 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash 660401436, now seen corresponding path program 9 times [2021-12-06 19:24:13,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:13,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755228072] [2021-12-06 19:24:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:13,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:13,081 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 19:24:13,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:13,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755228072] [2021-12-06 19:24:13,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755228072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:24:13,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:24:13,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:24:13,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471768473] [2021-12-06 19:24:13,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:24:13,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:24:13,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:13,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:24:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:24:13,083 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-06 19:24:13,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 375 transitions, 6322 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:13,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:13,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-06 19:24:13,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:14,064 INFO L129 PetriNetUnfolder]: 2738/6084 cut-off events. [2021-12-06 19:24:14,064 INFO L130 PetriNetUnfolder]: For 67298/67443 co-relation queries the response was YES. [2021-12-06 19:24:14,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33669 conditions, 6084 events. 2738/6084 cut-off events. For 67298/67443 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 52431 event pairs, 897 based on Foata normal form. 51/5947 useless extension candidates. Maximal degree in co-relation 33610. Up to 3993 conditions per place. [2021-12-06 19:24:14,132 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 285 selfloop transitions, 73 changer transitions 5/434 dead transitions. [2021-12-06 19:24:14,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 434 transitions, 7940 flow [2021-12-06 19:24:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:24:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 19:24:14,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 482 transitions. [2021-12-06 19:24:14,133 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8281786941580757 [2021-12-06 19:24:14,133 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 482 transitions. [2021-12-06 19:24:14,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 482 transitions. [2021-12-06 19:24:14,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:14,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 482 transitions. [2021-12-06 19:24:14,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.33333333333333) internal successors, (482), 6 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:14,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:14,135 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:14,135 INFO L186 Difference]: Start difference. First operand has 197 places, 375 transitions, 6322 flow. Second operand 6 states and 482 transitions. [2021-12-06 19:24:14,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 434 transitions, 7940 flow [2021-12-06 19:24:14,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 434 transitions, 7741 flow, removed 24 selfloop flow, removed 6 redundant places. [2021-12-06 19:24:14,295 INFO L242 Difference]: Finished difference. Result has 197 places, 376 transitions, 6422 flow [2021-12-06 19:24:14,296 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5906, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6422, PETRI_PLACES=197, PETRI_TRANSITIONS=376} [2021-12-06 19:24:14,296 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 111 predicate places. [2021-12-06 19:24:14,296 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 376 transitions, 6422 flow [2021-12-06 19:24:14,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:14,296 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:14,297 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] [2021-12-06 19:24:14,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 19:24:14,297 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1529869260, now seen corresponding path program 1 times [2021-12-06 19:24:14,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:14,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722103418] [2021-12-06 19:24:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:14,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:14,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:14,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722103418] [2021-12-06 19:24:14,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722103418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:24:14,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93506717] [2021-12-06 19:24:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:14,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:14,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:24:14,410 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:24:14,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:24:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:14,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:24:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:24:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:14,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:24:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:19,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93506717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:24:19,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:24:19,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 19 [2021-12-06 19:24:19,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741433895] [2021-12-06 19:24:19,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:24:19,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:24:19,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:24:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=274, Unknown=2, NotChecked=0, Total=342 [2021-12-06 19:24:19,447 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-12-06 19:24:19,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 376 transitions, 6422 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:19,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:19,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-12-06 19:24:19,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:22,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 19:24:25,492 INFO L129 PetriNetUnfolder]: 2550/7054 cut-off events. [2021-12-06 19:24:25,492 INFO L130 PetriNetUnfolder]: For 71949/72373 co-relation queries the response was YES. [2021-12-06 19:24:25,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37756 conditions, 7054 events. 2550/7054 cut-off events. For 71949/72373 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 68508 event pairs, 198 based on Foata normal form. 110/7040 useless extension candidates. Maximal degree in co-relation 37697. Up to 2251 conditions per place. [2021-12-06 19:24:25,589 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 321 selfloop transitions, 336 changer transitions 6/737 dead transitions. [2021-12-06 19:24:25,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 737 transitions, 13275 flow [2021-12-06 19:24:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:24:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-06 19:24:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1081 transitions. [2021-12-06 19:24:25,591 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7429553264604811 [2021-12-06 19:24:25,591 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1081 transitions. [2021-12-06 19:24:25,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1081 transitions. [2021-12-06 19:24:25,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:25,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1081 transitions. [2021-12-06 19:24:25,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.06666666666666) internal successors, (1081), 15 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:25,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:25,596 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:25,596 INFO L186 Difference]: Start difference. First operand has 197 places, 376 transitions, 6422 flow. Second operand 15 states and 1081 transitions. [2021-12-06 19:24:25,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 737 transitions, 13275 flow [2021-12-06 19:24:25,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 737 transitions, 13052 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-12-06 19:24:25,786 INFO L242 Difference]: Finished difference. Result has 203 places, 566 transitions, 10049 flow [2021-12-06 19:24:25,786 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6199, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10049, PETRI_PLACES=203, PETRI_TRANSITIONS=566} [2021-12-06 19:24:25,787 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 117 predicate places. [2021-12-06 19:24:25,787 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 566 transitions, 10049 flow [2021-12-06 19:24:25,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:25,788 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:25,788 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] [2021-12-06 19:24:25,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:24:25,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:25,990 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:25,991 INFO L85 PathProgramCache]: Analyzing trace with hash -396124932, now seen corresponding path program 2 times [2021-12-06 19:24:25,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:25,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894871023] [2021-12-06 19:24:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:25,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:26,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:26,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894871023] [2021-12-06 19:24:26,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894871023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:24:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150386194] [2021-12-06 19:24:26,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:24:26,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:26,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:24:26,165 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:24:26,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:24:26,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:24:26,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:24:26,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:24:26,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:24:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:26,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:24:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:29,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150386194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:24:29,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:24:29,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2021-12-06 19:24:29,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934661800] [2021-12-06 19:24:29,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:24:29,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:24:29,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:24:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=295, Unknown=1, NotChecked=0, Total=380 [2021-12-06 19:24:29,153 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2021-12-06 19:24:29,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 566 transitions, 10049 flow. Second operand has 20 states, 20 states have (on average 65.25) internal successors, (1305), 20 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:29,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:29,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2021-12-06 19:24:29,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:32,746 INFO L129 PetriNetUnfolder]: 4868/12512 cut-off events. [2021-12-06 19:24:32,746 INFO L130 PetriNetUnfolder]: For 134524/134613 co-relation queries the response was YES. [2021-12-06 19:24:32,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71110 conditions, 12512 events. 4868/12512 cut-off events. For 134524/134613 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 131437 event pairs, 260 based on Foata normal form. 23/12412 useless extension candidates. Maximal degree in co-relation 71051. Up to 3435 conditions per place. [2021-12-06 19:24:32,893 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 473 selfloop transitions, 576 changer transitions 14/1121 dead transitions. [2021-12-06 19:24:32,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 1121 transitions, 20922 flow [2021-12-06 19:24:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 19:24:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-06 19:24:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1617 transitions. [2021-12-06 19:24:32,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7247870909905871 [2021-12-06 19:24:32,895 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1617 transitions. [2021-12-06 19:24:32,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1617 transitions. [2021-12-06 19:24:32,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:32,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1617 transitions. [2021-12-06 19:24:32,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 70.30434782608695) internal successors, (1617), 23 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:32,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 97.0) internal successors, (2328), 24 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:32,899 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 97.0) internal successors, (2328), 24 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:32,899 INFO L186 Difference]: Start difference. First operand has 203 places, 566 transitions, 10049 flow. Second operand 23 states and 1617 transitions. [2021-12-06 19:24:32,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 1121 transitions, 20922 flow [2021-12-06 19:24:33,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1121 transitions, 20355 flow, removed 248 selfloop flow, removed 4 redundant places. [2021-12-06 19:24:33,230 INFO L242 Difference]: Finished difference. Result has 227 places, 789 transitions, 14923 flow [2021-12-06 19:24:33,231 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9562, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14923, PETRI_PLACES=227, PETRI_TRANSITIONS=789} [2021-12-06 19:24:33,231 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 141 predicate places. [2021-12-06 19:24:33,231 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 789 transitions, 14923 flow [2021-12-06 19:24:33,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.25) internal successors, (1305), 20 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:33,231 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:33,231 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] [2021-12-06 19:24:33,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:24:33,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:33,433 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:33,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:33,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1421612384, now seen corresponding path program 3 times [2021-12-06 19:24:33,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:33,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730489629] [2021-12-06 19:24:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:33,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:33,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:33,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730489629] [2021-12-06 19:24:33,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730489629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:24:33,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660070212] [2021-12-06 19:24:33,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:24:33,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:33,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:24:33,586 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:24:33,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:24:33,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 19:24:33,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:24:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 19:24:33,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:24:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:33,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:24:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:34,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660070212] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:24:34,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:24:34,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2021-12-06 19:24:34,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749230281] [2021-12-06 19:24:34,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:24:34,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:24:34,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:34,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:24:34,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:24:34,456 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2021-12-06 19:24:34,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 789 transitions, 14923 flow. Second operand has 17 states, 17 states have (on average 65.76470588235294) internal successors, (1118), 17 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:34,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:34,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2021-12-06 19:24:34,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:37,698 INFO L129 PetriNetUnfolder]: 5635/14241 cut-off events. [2021-12-06 19:24:37,698 INFO L130 PetriNetUnfolder]: For 181587/181724 co-relation queries the response was YES. [2021-12-06 19:24:37,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87443 conditions, 14241 events. 5635/14241 cut-off events. For 181587/181724 co-relation queries the response was YES. Maximal size of possible extension queue 1056. Compared 151529 event pairs, 1010 based on Foata normal form. 17/14033 useless extension candidates. Maximal degree in co-relation 87378. Up to 8243 conditions per place. [2021-12-06 19:24:37,892 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 620 selfloop transitions, 362 changer transitions 4/1044 dead transitions. [2021-12-06 19:24:37,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 1044 transitions, 22056 flow [2021-12-06 19:24:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:24:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 19:24:37,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 829 transitions. [2021-12-06 19:24:37,893 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7121993127147767 [2021-12-06 19:24:37,893 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 829 transitions. [2021-12-06 19:24:37,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 829 transitions. [2021-12-06 19:24:37,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:37,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 829 transitions. [2021-12-06 19:24:37,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.08333333333333) internal successors, (829), 12 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:37,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:37,896 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:37,896 INFO L186 Difference]: Start difference. First operand has 227 places, 789 transitions, 14923 flow. Second operand 12 states and 829 transitions. [2021-12-06 19:24:37,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 1044 transitions, 22056 flow [2021-12-06 19:24:38,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 1044 transitions, 20554 flow, removed 395 selfloop flow, removed 14 redundant places. [2021-12-06 19:24:38,776 INFO L242 Difference]: Finished difference. Result has 224 places, 972 transitions, 18753 flow [2021-12-06 19:24:38,777 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=13772, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18753, PETRI_PLACES=224, PETRI_TRANSITIONS=972} [2021-12-06 19:24:38,777 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 138 predicate places. [2021-12-06 19:24:38,777 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 972 transitions, 18753 flow [2021-12-06 19:24:38,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.76470588235294) internal successors, (1118), 17 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:38,777 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:38,777 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] [2021-12-06 19:24:38,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:24:38,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 19:24:38,978 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:38,979 INFO L85 PathProgramCache]: Analyzing trace with hash 438857278, now seen corresponding path program 1 times [2021-12-06 19:24:38,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:38,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578671969] [2021-12-06 19:24:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:38,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:39,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:39,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578671969] [2021-12-06 19:24:39,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578671969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:24:39,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230802551] [2021-12-06 19:24:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:39,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:24:39,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:24:39,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:24:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:39,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:24:39,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:24:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:39,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:24:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:39,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230802551] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:24:39,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:24:39,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 22 [2021-12-06 19:24:39,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287164704] [2021-12-06 19:24:39,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:24:39,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 19:24:39,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:39,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 19:24:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:24:39,902 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-06 19:24:39,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 972 transitions, 18753 flow. Second operand has 22 states, 22 states have (on average 71.18181818181819) internal successors, (1566), 22 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 19:24:39,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:39,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-06 19:24:39,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:24:50,270 INFO L129 PetriNetUnfolder]: 13246/27006 cut-off events. [2021-12-06 19:24:50,270 INFO L130 PetriNetUnfolder]: For 324841/324857 co-relation queries the response was YES. [2021-12-06 19:24:50,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163485 conditions, 27006 events. 13246/27006 cut-off events. For 324841/324857 co-relation queries the response was YES. Maximal size of possible extension queue 1964. Compared 277114 event pairs, 719 based on Foata normal form. 1114/27942 useless extension candidates. Maximal degree in co-relation 163421. Up to 5887 conditions per place. [2021-12-06 19:24:50,658 INFO L132 encePairwiseOnDemand]: 81/97 looper letters, 1330 selfloop transitions, 1493 changer transitions 1/2879 dead transitions. [2021-12-06 19:24:50,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 2879 transitions, 54505 flow [2021-12-06 19:24:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 19:24:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-12-06 19:24:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 5719 transitions. [2021-12-06 19:24:50,664 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7967400390080802 [2021-12-06 19:24:50,664 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 5719 transitions. [2021-12-06 19:24:50,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 5719 transitions. [2021-12-06 19:24:50,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:24:50,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 5719 transitions. [2021-12-06 19:24:50,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 77.28378378378379) internal successors, (5719), 74 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:50,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 97.0) internal successors, (7275), 75 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:50,676 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 97.0) internal successors, (7275), 75 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:50,677 INFO L186 Difference]: Start difference. First operand has 224 places, 972 transitions, 18753 flow. Second operand 74 states and 5719 transitions. [2021-12-06 19:24:50,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 2879 transitions, 54505 flow [2021-12-06 19:24:52,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 2879 transitions, 52966 flow, removed 487 selfloop flow, removed 9 redundant places. [2021-12-06 19:24:52,378 INFO L242 Difference]: Finished difference. Result has 337 places, 2297 transitions, 45772 flow [2021-12-06 19:24:52,379 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16333, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=45772, PETRI_PLACES=337, PETRI_TRANSITIONS=2297} [2021-12-06 19:24:52,379 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 251 predicate places. [2021-12-06 19:24:52,379 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 2297 transitions, 45772 flow [2021-12-06 19:24:52,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.18181818181819) internal successors, (1566), 22 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 19:24:52,380 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:24:52,380 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] [2021-12-06 19:24:52,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 19:24:52,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 19:24:52,581 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:24:52,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:24:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1676599158, now seen corresponding path program 2 times [2021-12-06 19:24:52,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:24:52,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419811119] [2021-12-06 19:24:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:24:52,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:24:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:24:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:52,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:24:52,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419811119] [2021-12-06 19:24:52,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419811119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:24:52,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916275366] [2021-12-06 19:24:52,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:24:52,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:24:52,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:24:52,739 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:24:52,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:24:52,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:24:52,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:24:52,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 19:24:52,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:24:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:53,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:24:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:24:53,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916275366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:24:53,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:24:53,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 24 [2021-12-06 19:24:53,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954488522] [2021-12-06 19:24:53,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:24:53,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 19:24:53,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:24:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 19:24:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:24:53,596 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-06 19:24:53,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 2297 transitions, 45772 flow. Second operand has 24 states, 24 states have (on average 70.875) internal successors, (1701), 24 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:24:53,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:24:53,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-06 19:24:53,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:25:30,104 INFO L129 PetriNetUnfolder]: 28687/62164 cut-off events. [2021-12-06 19:25:30,104 INFO L130 PetriNetUnfolder]: For 1471556/1471587 co-relation queries the response was YES. [2021-12-06 19:25:31,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 476126 conditions, 62164 events. 28687/62164 cut-off events. For 1471556/1471587 co-relation queries the response was YES. Maximal size of possible extension queue 3870. Compared 730554 event pairs, 462 based on Foata normal form. 874/62798 useless extension candidates. Maximal degree in co-relation 476013. Up to 12503 conditions per place. [2021-12-06 19:25:31,771 INFO L132 encePairwiseOnDemand]: 79/97 looper letters, 3072 selfloop transitions, 5122 changer transitions 0/8249 dead transitions. [2021-12-06 19:25:31,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 8249 transitions, 178875 flow [2021-12-06 19:25:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-06 19:25:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-12-06 19:25:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 6941 transitions. [2021-12-06 19:25:31,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8131443298969072 [2021-12-06 19:25:31,778 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 6941 transitions. [2021-12-06 19:25:31,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 6941 transitions. [2021-12-06 19:25:31,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:25:31,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 6941 transitions. [2021-12-06 19:25:31,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 78.875) internal successors, (6941), 88 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:31,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 97.0) internal successors, (8633), 89 states have internal predecessors, (8633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:31,794 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 97.0) internal successors, (8633), 89 states have internal predecessors, (8633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:25:31,794 INFO L186 Difference]: Start difference. First operand has 337 places, 2297 transitions, 45772 flow. Second operand 88 states and 6941 transitions. [2021-12-06 19:25:31,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 8249 transitions, 178875 flow [2021-12-06 19:26:03,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 8249 transitions, 169579 flow, removed 4348 selfloop flow, removed 11 redundant places. [2021-12-06 19:26:03,387 INFO L242 Difference]: Finished difference. Result has 489 places, 6829 transitions, 149484 flow [2021-12-06 19:26:03,389 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=42334, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=149484, PETRI_PLACES=489, PETRI_TRANSITIONS=6829} [2021-12-06 19:26:03,389 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 403 predicate places. [2021-12-06 19:26:03,389 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 6829 transitions, 149484 flow [2021-12-06 19:26:03,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 70.875) internal successors, (1701), 24 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:03,389 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:26:03,389 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] [2021-12-06 19:26:03,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:26:03,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 19:26:03,591 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:26:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:26:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1667275668, now seen corresponding path program 3 times [2021-12-06 19:26:03,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:26:03,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814366212] [2021-12-06 19:26:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:26:03,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:26:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:26:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:26:03,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:26:03,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814366212] [2021-12-06 19:26:03,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814366212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:26:03,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665882256] [2021-12-06 19:26:03,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:26:03,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:26:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:26:03,710 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:26:03,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:26:03,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 19:26:03,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:26:03,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 19:26:03,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:26:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:26:03,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:26:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:26:04,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665882256] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:26:04,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:26:04,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 11] total 19 [2021-12-06 19:26:04,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276834446] [2021-12-06 19:26:04,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:26:04,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 19:26:04,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:26:04,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 19:26:04,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:26:04,293 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-06 19:26:04,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 6829 transitions, 149484 flow. Second operand has 19 states, 19 states have (on average 71.10526315789474) internal successors, (1351), 19 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:26:04,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:26:04,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-06 19:26:04,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 19:28:59,301 INFO L129 PetriNetUnfolder]: 54013/119972 cut-off events. [2021-12-06 19:28:59,301 INFO L130 PetriNetUnfolder]: For 5182336/5182385 co-relation queries the response was YES. [2021-12-06 19:29:03,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1105448 conditions, 119972 events. 54013/119972 cut-off events. For 5182336/5182385 co-relation queries the response was YES. Maximal size of possible extension queue 7193. Compared 1559085 event pairs, 634 based on Foata normal form. 1926/121610 useless extension candidates. Maximal degree in co-relation 1105266. Up to 23999 conditions per place. [2021-12-06 19:29:05,117 INFO L132 encePairwiseOnDemand]: 80/97 looper letters, 4863 selfloop transitions, 14399 changer transitions 54/19371 dead transitions. [2021-12-06 19:29:05,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 19371 transitions, 475629 flow [2021-12-06 19:29:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-12-06 19:29:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-12-06 19:29:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 11661 transitions. [2021-12-06 19:29:05,128 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7961357274527207 [2021-12-06 19:29:05,128 INFO L72 ComplementDD]: Start complementDD. Operand 151 states and 11661 transitions. [2021-12-06 19:29:05,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 151 states and 11661 transitions. [2021-12-06 19:29:05,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:29:05,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 151 states and 11661 transitions. [2021-12-06 19:29:05,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 152 states, 151 states have (on average 77.2251655629139) internal successors, (11661), 151 states have internal predecessors, (11661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:29:05,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 152 states, 152 states have (on average 97.0) internal successors, (14744), 152 states have internal predecessors, (14744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:29:05,159 INFO L81 ComplementDD]: Finished complementDD. Result has 152 states, 152 states have (on average 97.0) internal successors, (14744), 152 states have internal predecessors, (14744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:29:05,160 INFO L186 Difference]: Start difference. First operand has 489 places, 6829 transitions, 149484 flow. Second operand 151 states and 11661 transitions. [2021-12-06 19:29:05,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 19371 transitions, 475629 flow [2021-12-06 19:34:15,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 19371 transitions, 450323 flow, removed 12653 selfloop flow, removed 0 redundant places. [2021-12-06 19:34:15,423 INFO L242 Difference]: Finished difference. Result has 771 places, 17252 transitions, 419458 flow [2021-12-06 19:34:15,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=138895, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=151, PETRI_FLOW=419458, PETRI_PLACES=771, PETRI_TRANSITIONS=17252} [2021-12-06 19:34:15,429 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 685 predicate places. [2021-12-06 19:34:15,429 INFO L470 AbstractCegarLoop]: Abstraction has has 771 places, 17252 transitions, 419458 flow [2021-12-06 19:34:15,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 71.10526315789474) internal successors, (1351), 19 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:15,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 19:34:15,429 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] [2021-12-06 19:34:15,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:34:15,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 19:34:15,631 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 19:34:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash -137795506, now seen corresponding path program 4 times [2021-12-06 19:34:15,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:15,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221908547] [2021-12-06 19:34:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:15,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:34:15,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:15,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221908547] [2021-12-06 19:34:15,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221908547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:15,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180297512] [2021-12-06 19:34:15,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:34:15,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:15,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:15,744 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:15,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a07ec936-8bcb-4b42-8175-b101abf216f8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:34:15,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:34:15,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:34:15,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 19:34:15,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:34:16,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:34:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:34:16,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180297512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:34:16,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:34:16,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 11] total 22 [2021-12-06 19:34:16,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091394128] [2021-12-06 19:34:16,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:34:16,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 19:34:16,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 19:34:16,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:34:16,518 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-06 19:34:16,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 17252 transitions, 419458 flow. Second operand has 22 states, 22 states have (on average 71.0) internal successors, (1562), 22 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:16,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 19:34:16,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-06 19:34:16,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand