./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY --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 a48fe857d08ac3a4ba438de35e4bd3e7e5363b4267f7ed4ba2475f684ca08cd5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:11:33,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:11:33,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:11:33,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:11:33,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:11:33,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:11:33,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:11:33,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:11:33,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:11:33,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:11:33,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:11:33,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:11:33,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:11:33,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:11:33,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:11:33,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:11:33,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:11:33,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:11:33,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:11:33,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:11:33,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:11:33,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:11:33,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:11:33,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:11:33,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:11:33,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:11:33,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:11:33,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:11:33,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:11:33,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:11:33,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:11:33,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:11:33,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:11:33,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:11:33,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:11:33,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:11:33,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:11:33,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:11:33,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:11:33,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:11:33,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:11:33,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:11:33,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:11:33,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:11:33,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:11:33,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:11:33,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:11:33,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:11:33,964 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:11:33,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:11:33,964 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:11:33,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:11:33,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:11:33,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:11:33,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:11:33,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:11:33,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:11:33,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:11:33,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:11:33,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:11:33,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:11:33,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:11:33,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:11:33,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:11:33,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:11:33,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:11:33,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:11:33,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:11:33,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:11:33,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:11:33,970 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:11:33,971 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:11:33,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:11:33,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:11:33,972 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_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a48fe857d08ac3a4ba438de35e4bd3e7e5363b4267f7ed4ba2475f684ca08cd5 [2021-11-07 08:11:34,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:11:34,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:11:34,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:11:34,252 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:11:34,253 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:11:34,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/pthread/fib_safe-10.i [2021-11-07 08:11:34,322 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/data/c15104fe9/0c649b6483ac4cc0b41418f1b636bd69/FLAGcf2c6fa80 [2021-11-07 08:11:34,891 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:11:34,892 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/sv-benchmarks/c/pthread/fib_safe-10.i [2021-11-07 08:11:34,913 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/data/c15104fe9/0c649b6483ac4cc0b41418f1b636bd69/FLAGcf2c6fa80 [2021-11-07 08:11:35,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/data/c15104fe9/0c649b6483ac4cc0b41418f1b636bd69 [2021-11-07 08:11:35,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:11:35,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:11:35,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:11:35,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:11:35,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:11:35,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b3aa19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35, skipping insertion in model container [2021-11-07 08:11:35,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:11:35,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:11:35,735 WARN L228 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_854a714a-cf69-4cb3-8d5a-10698fe133a2/sv-benchmarks/c/pthread/fib_safe-10.i[30815,30828] [2021-11-07 08:11:35,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:11:35,749 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:11:35,813 WARN L228 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_854a714a-cf69-4cb3-8d5a-10698fe133a2/sv-benchmarks/c/pthread/fib_safe-10.i[30815,30828] [2021-11-07 08:11:35,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:11:35,861 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:11:35,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35 WrapperNode [2021-11-07 08:11:35,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:11:35,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:11:35,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:11:35,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:11:35,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:11:35,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:11:35,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:11:35,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:11:35,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:11:35,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:11:35,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:11:35,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:11:35,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (1/1) ... [2021-11-07 08:11:35,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:11:36,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:36,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:11:36,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:11:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-07 08:11:36,078 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-07 08:11:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-07 08:11:36,078 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-07 08:11:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:11:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 08:11:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:11:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:11:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:11:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 08:11:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:11:36,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:11:36,081 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 08:11:36,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:11:36,357 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-07 08:11:36,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:11:36 BoogieIcfgContainer [2021-11-07 08:11:36,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:11:36,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:11:36,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:11:36,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:11:36,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:11:35" (1/3) ... [2021-11-07 08:11:36,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d13856c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:11:36, skipping insertion in model container [2021-11-07 08:11:36,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:35" (2/3) ... [2021-11-07 08:11:36,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d13856c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:11:36, skipping insertion in model container [2021-11-07 08:11:36,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:11:36" (3/3) ... [2021-11-07 08:11:36,370 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2021-11-07 08:11:36,375 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 08:11:36,375 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:11:36,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:11:36,376 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 08:11:36,405 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,406 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,406 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,406 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,407 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,407 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,407 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,408 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,408 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,409 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,409 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,409 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,410 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,410 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,410 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,411 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,411 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,411 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,412 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,412 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,412 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,413 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,413 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,413 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,413 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,414 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,414 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,415 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,415 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,415 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,416 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,416 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,417 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,417 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,417 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,418 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,421 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,421 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,422 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,422 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,422 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,427 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,427 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,428 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,428 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,428 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 08:11:36,431 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-07 08:11:36,479 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:11:36,485 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 [2021-11-07 08:11:36,486 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 08:11:36,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 90 transitions, 190 flow [2021-11-07 08:11:36,562 INFO L129 PetriNetUnfolder]: 7/88 cut-off events. [2021-11-07 08:11:36,563 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:11:36,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 88 events. 7/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2021-11-07 08:11:36,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 90 transitions, 190 flow [2021-11-07 08:11:36,592 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 88 transitions, 182 flow [2021-11-07 08:11:36,639 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2021-11-07 08:11:36,645 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:11:36,645 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:11:36,646 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] [2021-11-07 08:11:36,647 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:11:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2010782680, now seen corresponding path program 1 times [2021-11-07 08:11:36,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:36,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599528404] [2021-11-07 08:11:36,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:36,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:36,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:36,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599528404] [2021-11-07 08:11:36,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599528404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:11:36,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:11:36,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:11:36,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179364026] [2021-11-07 08:11:36,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:11:36,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:11:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:11:36,957 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 90 [2021-11-07 08:11:36,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:36,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:11:36,961 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 90 [2021-11-07 08:11:36,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:11:36,992 INFO L129 PetriNetUnfolder]: 3/83 cut-off events. [2021-11-07 08:11:36,993 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:11:36,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 3/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 4/83 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2021-11-07 08:11:37,000 INFO L132 encePairwiseOnDemand]: 86/90 looper letters, 0 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2021-11-07 08:11:37,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 172 flow [2021-11-07 08:11:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:11:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-07 08:11:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 174 transitions. [2021-11-07 08:11:37,019 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9666666666666667 [2021-11-07 08:11:37,021 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 174 transitions. [2021-11-07 08:11:37,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 174 transitions. [2021-11-07 08:11:37,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:11:37,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 174 transitions. [2021-11-07 08:11:37,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,035 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,037 INFO L186 Difference]: Start difference. First operand has 88 places, 88 transitions, 182 flow. Second operand 2 states and 174 transitions. [2021-11-07 08:11:37,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 172 flow [2021-11-07 08:11:37,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-07 08:11:37,045 INFO L242 Difference]: Finished difference. Result has 86 places, 83 transitions, 170 flow [2021-11-07 08:11:37,047 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=170, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2021-11-07 08:11:37,048 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2021-11-07 08:11:37,048 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 170 flow [2021-11-07 08:11:37,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,048 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:11:37,049 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] [2021-11-07 08:11:37,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:11:37,049 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:11:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:37,050 INFO L85 PathProgramCache]: Analyzing trace with hash -267972345, now seen corresponding path program 1 times [2021-11-07 08:11:37,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:37,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556184527] [2021-11-07 08:11:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:37,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:37,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:37,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556184527] [2021-11-07 08:11:37,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556184527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:11:37,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:11:37,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:11:37,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987989817] [2021-11-07 08:11:37,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:11:37,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:37,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:11:37,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:11:37,231 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 90 [2021-11-07 08:11:37,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:11:37,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 90 [2021-11-07 08:11:37,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:11:37,274 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2021-11-07 08:11:37,274 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-07 08:11:37,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 89 events. 3/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2021-11-07 08:11:37,276 INFO L132 encePairwiseOnDemand]: 87/90 looper letters, 7 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2021-11-07 08:11:37,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 194 flow [2021-11-07 08:11:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:11:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-07 08:11:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2021-11-07 08:11:37,280 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9148148148148149 [2021-11-07 08:11:37,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2021-11-07 08:11:37,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2021-11-07 08:11:37,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:11:37,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2021-11-07 08:11:37,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,286 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 170 flow. Second operand 3 states and 247 transitions. [2021-11-07 08:11:37,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 194 flow [2021-11-07 08:11:37,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-07 08:11:37,290 INFO L242 Difference]: Finished difference. Result has 89 places, 84 transitions, 182 flow [2021-11-07 08:11:37,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2021-11-07 08:11:37,291 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2021-11-07 08:11:37,292 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 182 flow [2021-11-07 08:11:37,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:11:37,293 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:37,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:11:37,293 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:11:37,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:37,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2020520326, now seen corresponding path program 1 times [2021-11-07 08:11:37,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:37,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313718383] [2021-11-07 08:11:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:37,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:37,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:37,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313718383] [2021-11-07 08:11:37,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313718383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:37,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964031687] [2021-11-07 08:11:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:37,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:37,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:37,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:37,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:11:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:11:37,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:37,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964031687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:37,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:37,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-07 08:11:37,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119633284] [2021-11-07 08:11:37,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:11:37,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:11:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:11:37,856 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:11:37,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:11:37,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:11:37,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:11:37,959 INFO L129 PetriNetUnfolder]: 3/96 cut-off events. [2021-11-07 08:11:37,960 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-07 08:11:37,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 96 events. 3/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 121. Up to 7 conditions per place. [2021-11-07 08:11:37,965 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 10 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2021-11-07 08:11:37,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 226 flow [2021-11-07 08:11:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:11:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-07 08:11:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 478 transitions. [2021-11-07 08:11:37,972 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8851851851851852 [2021-11-07 08:11:37,972 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 478 transitions. [2021-11-07 08:11:37,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 478 transitions. [2021-11-07 08:11:37,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:11:37,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 478 transitions. [2021-11-07 08:11:37,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.66666666666667) internal successors, (478), 6 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,980 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,981 INFO L186 Difference]: Start difference. First operand has 89 places, 84 transitions, 182 flow. Second operand 6 states and 478 transitions. [2021-11-07 08:11:37,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 226 flow [2021-11-07 08:11:37,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-07 08:11:37,988 INFO L242 Difference]: Finished difference. Result has 96 places, 87 transitions, 212 flow [2021-11-07 08:11:37,991 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2021-11-07 08:11:37,991 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 8 predicate places. [2021-11-07 08:11:37,992 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 212 flow [2021-11-07 08:11:37,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:37,992 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:11:37,993 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:38,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:38,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:38,216 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:11:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:38,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1122522151, now seen corresponding path program 2 times [2021-11-07 08:11:38,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:38,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093258507] [2021-11-07 08:11:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:38,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:38,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:38,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093258507] [2021-11-07 08:11:38,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093258507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:38,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552274750] [2021-11-07 08:11:38,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:11:38,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:38,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:38,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:38,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:11:38,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:11:38,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:11:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:38,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552274750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:38,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:38,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-07 08:11:38,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929658021] [2021-11-07 08:11:38,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:11:38,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:38,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:11:38,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:11:38,801 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:11:38,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:38,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:11:38,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:11:38,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:11:38,896 INFO L129 PetriNetUnfolder]: 3/103 cut-off events. [2021-11-07 08:11:38,897 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-11-07 08:11:38,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 103 events. 3/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 148. Up to 7 conditions per place. [2021-11-07 08:11:38,899 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 11 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2021-11-07 08:11:38,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 94 transitions, 274 flow [2021-11-07 08:11:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:11:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-07 08:11:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2021-11-07 08:11:38,902 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8802469135802469 [2021-11-07 08:11:38,902 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 713 transitions. [2021-11-07 08:11:38,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 713 transitions. [2021-11-07 08:11:38,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:11:38,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 713 transitions. [2021-11-07 08:11:38,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.22222222222223) internal successors, (713), 9 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:38,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:38,909 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:38,910 INFO L186 Difference]: Start difference. First operand has 96 places, 87 transitions, 212 flow. Second operand 9 states and 713 transitions. [2021-11-07 08:11:38,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 94 transitions, 274 flow [2021-11-07 08:11:38,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 94 transitions, 268 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-11-07 08:11:38,914 INFO L242 Difference]: Finished difference. Result has 105 places, 90 transitions, 250 flow [2021-11-07 08:11:38,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2021-11-07 08:11:38,915 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 17 predicate places. [2021-11-07 08:11:38,915 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 250 flow [2021-11-07 08:11:38,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:38,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:11:38,916 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:38,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:39,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:39,131 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:11:39,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:39,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1095871078, now seen corresponding path program 3 times [2021-11-07 08:11:39,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:39,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997953263] [2021-11-07 08:11:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:39,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:39,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:39,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997953263] [2021-11-07 08:11:39,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997953263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:39,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815411885] [2021-11-07 08:11:39,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:11:39,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:39,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:39,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:39,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:11:39,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 08:11:39,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:39,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:11:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:39,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815411885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:39,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:39,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-07 08:11:39,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327227076] [2021-11-07 08:11:39,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:11:39,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:11:39,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:11:39,570 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:11:39,571 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 250 flow. Second operand has 11 states, 11 states have (on average 78.81818181818181) internal successors, (867), 11 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:39,571 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:11:39,571 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:11:39,571 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:11:39,662 INFO L129 PetriNetUnfolder]: 3/110 cut-off events. [2021-11-07 08:11:39,662 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2021-11-07 08:11:39,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 110 events. 3/110 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 179. Up to 7 conditions per place. [2021-11-07 08:11:39,664 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 12 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2021-11-07 08:11:39,664 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 98 transitions, 330 flow [2021-11-07 08:11:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:11:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-07 08:11:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 948 transitions. [2021-11-07 08:11:39,668 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8777777777777778 [2021-11-07 08:11:39,668 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 948 transitions. [2021-11-07 08:11:39,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 948 transitions. [2021-11-07 08:11:39,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:11:39,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 948 transitions. [2021-11-07 08:11:39,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.0) internal successors, (948), 12 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:39,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 90.0) internal successors, (1170), 13 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:39,676 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 90.0) internal successors, (1170), 13 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:39,676 INFO L186 Difference]: Start difference. First operand has 105 places, 90 transitions, 250 flow. Second operand 12 states and 948 transitions. [2021-11-07 08:11:39,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 98 transitions, 330 flow [2021-11-07 08:11:39,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 98 transitions, 312 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-11-07 08:11:39,682 INFO L242 Difference]: Finished difference. Result has 114 places, 93 transitions, 288 flow [2021-11-07 08:11:39,682 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=288, PETRI_PLACES=114, PETRI_TRANSITIONS=93} [2021-11-07 08:11:39,682 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 26 predicate places. [2021-11-07 08:11:39,682 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 93 transitions, 288 flow [2021-11-07 08:11:39,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 78.81818181818181) internal successors, (867), 11 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:39,683 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:11:39,684 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:39,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:39,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:39,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:11:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 541433671, now seen corresponding path program 4 times [2021-11-07 08:11:39,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:39,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358598693] [2021-11-07 08:11:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:39,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:40,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:40,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358598693] [2021-11-07 08:11:40,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358598693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:40,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455002871] [2021-11-07 08:11:40,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:11:40,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:40,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:40,055 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:40,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:11:40,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:11:40,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:40,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:11:40,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:41,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455002871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:41,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:41,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-11-07 08:11:41,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001135733] [2021-11-07 08:11:41,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:11:41,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:11:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:11:41,314 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-07 08:11:41,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 93 transitions, 288 flow. Second operand has 27 states, 27 states have (on average 59.407407407407405) internal successors, (1604), 27 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:41,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:11:41,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-07 08:11:41,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:11:43,857 INFO L129 PetriNetUnfolder]: 685/1417 cut-off events. [2021-11-07 08:11:43,857 INFO L130 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2021-11-07 08:11:43,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 1417 events. 685/1417 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6691 event pairs, 2 based on Foata normal form. 7/1357 useless extension candidates. Maximal degree in co-relation 2878. Up to 342 conditions per place. [2021-11-07 08:11:43,879 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 189 selfloop transitions, 158 changer transitions 11/405 dead transitions. [2021-11-07 08:11:43,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 405 transitions, 1997 flow [2021-11-07 08:11:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-07 08:11:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-11-07 08:11:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4444 transitions. [2021-11-07 08:11:43,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6764079147640791 [2021-11-07 08:11:43,895 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4444 transitions. [2021-11-07 08:11:43,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4444 transitions. [2021-11-07 08:11:43,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:11:43,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4444 transitions. [2021-11-07 08:11:43,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 60.87671232876713) internal successors, (4444), 73 states have internal predecessors, (4444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:43,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 90.0) internal successors, (6660), 74 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:43,932 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 90.0) internal successors, (6660), 74 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:43,933 INFO L186 Difference]: Start difference. First operand has 114 places, 93 transitions, 288 flow. Second operand 73 states and 4444 transitions. [2021-11-07 08:11:43,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 405 transitions, 1997 flow [2021-11-07 08:11:43,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 405 transitions, 1883 flow, removed 28 selfloop flow, removed 8 redundant places. [2021-11-07 08:11:43,948 INFO L242 Difference]: Finished difference. Result has 216 places, 260 transitions, 1448 flow [2021-11-07 08:11:43,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=1448, PETRI_PLACES=216, PETRI_TRANSITIONS=260} [2021-11-07 08:11:43,949 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 128 predicate places. [2021-11-07 08:11:43,950 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 260 transitions, 1448 flow [2021-11-07 08:11:43,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 59.407407407407405) internal successors, (1604), 27 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:43,951 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:11:43,951 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:43,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-07 08:11:44,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 08:11:44,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:11:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash 645980809, now seen corresponding path program 1 times [2021-11-07 08:11:44,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:44,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388680280] [2021-11-07 08:11:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:44,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:44,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:44,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388680280] [2021-11-07 08:11:44,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388680280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:44,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578434733] [2021-11-07 08:11:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:44,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:44,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:44,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:44,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:11:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:11:44,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:44,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578434733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:44,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:44,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-07 08:11:44,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541578834] [2021-11-07 08:11:44,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:11:44,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:11:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:11:44,812 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:11:44,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 260 transitions, 1448 flow. Second operand has 15 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:44,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:11:44,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:11:44,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:11:45,285 INFO L129 PetriNetUnfolder]: 365/1110 cut-off events. [2021-11-07 08:11:45,285 INFO L130 PetriNetUnfolder]: For 73499/73629 co-relation queries the response was YES. [2021-11-07 08:11:45,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8265 conditions, 1110 events. 365/1110 cut-off events. For 73499/73629 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6089 event pairs, 53 based on Foata normal form. 48/1076 useless extension candidates. Maximal degree in co-relation 8213. Up to 259 conditions per place. [2021-11-07 08:11:45,344 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 14 selfloop transitions, 56 changer transitions 0/270 dead transitions. [2021-11-07 08:11:45,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 270 transitions, 1666 flow [2021-11-07 08:11:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:11:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-07 08:11:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1418 transitions. [2021-11-07 08:11:45,349 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8753086419753087 [2021-11-07 08:11:45,349 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1418 transitions. [2021-11-07 08:11:45,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1418 transitions. [2021-11-07 08:11:45,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:11:45,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1418 transitions. [2021-11-07 08:11:45,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 78.77777777777777) internal successors, (1418), 18 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:45,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 90.0) internal successors, (1710), 19 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:45,359 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 90.0) internal successors, (1710), 19 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:45,359 INFO L186 Difference]: Start difference. First operand has 216 places, 260 transitions, 1448 flow. Second operand 18 states and 1418 transitions. [2021-11-07 08:11:45,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 270 transitions, 1666 flow [2021-11-07 08:11:45,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 270 transitions, 1507 flow, removed 40 selfloop flow, removed 11 redundant places. [2021-11-07 08:11:45,556 INFO L242 Difference]: Finished difference. Result has 217 places, 263 transitions, 1471 flow [2021-11-07 08:11:45,556 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1471, PETRI_PLACES=217, PETRI_TRANSITIONS=263} [2021-11-07 08:11:45,557 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 129 predicate places. [2021-11-07 08:11:45,557 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 263 transitions, 1471 flow [2021-11-07 08:11:45,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:45,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:11:45,558 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:45,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:45,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:45,771 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:11:45,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1305512388, now seen corresponding path program 2 times [2021-11-07 08:11:45,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:45,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632777324] [2021-11-07 08:11:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:45,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:45,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:45,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632777324] [2021-11-07 08:11:45,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632777324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:45,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743583710] [2021-11-07 08:11:45,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:11:45,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:45,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:45,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:45,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:11:46,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:11:46,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:11:46,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:46,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743583710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:46,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:46,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-11-07 08:11:46,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636020687] [2021-11-07 08:11:46,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:11:46,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:46,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:11:46,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:11:46,514 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:11:46,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 263 transitions, 1471 flow. Second operand has 17 states, 17 states have (on average 78.88235294117646) internal successors, (1341), 17 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:46,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:11:46,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:11:46,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:11:47,069 INFO L129 PetriNetUnfolder]: 409/1187 cut-off events. [2021-11-07 08:11:47,069 INFO L130 PetriNetUnfolder]: For 84677/84820 co-relation queries the response was YES. [2021-11-07 08:11:47,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9476 conditions, 1187 events. 409/1187 cut-off events. For 84677/84820 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6358 event pairs, 65 based on Foata normal form. 69/1165 useless extension candidates. Maximal degree in co-relation 9420. Up to 302 conditions per place. [2021-11-07 08:11:47,129 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 15 selfloop transitions, 59 changer transitions 0/274 dead transitions. [2021-11-07 08:11:47,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 274 transitions, 1707 flow [2021-11-07 08:11:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:11:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-07 08:11:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1653 transitions. [2021-11-07 08:11:47,133 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8746031746031746 [2021-11-07 08:11:47,133 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1653 transitions. [2021-11-07 08:11:47,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1653 transitions. [2021-11-07 08:11:47,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:11:47,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1653 transitions. [2021-11-07 08:11:47,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.71428571428571) internal successors, (1653), 21 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:47,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 90.0) internal successors, (1980), 22 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:47,150 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 90.0) internal successors, (1980), 22 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:47,151 INFO L186 Difference]: Start difference. First operand has 217 places, 263 transitions, 1471 flow. Second operand 21 states and 1653 transitions. [2021-11-07 08:11:47,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 274 transitions, 1707 flow [2021-11-07 08:11:47,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 274 transitions, 1574 flow, removed 19 selfloop flow, removed 13 redundant places. [2021-11-07 08:11:47,306 INFO L242 Difference]: Finished difference. Result has 227 places, 266 transitions, 1526 flow [2021-11-07 08:11:47,306 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1526, PETRI_PLACES=227, PETRI_TRANSITIONS=266} [2021-11-07 08:11:47,307 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 139 predicate places. [2021-11-07 08:11:47,307 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 266 transitions, 1526 flow [2021-11-07 08:11:47,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 78.88235294117646) internal successors, (1341), 17 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:47,308 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:11:47,308 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:47,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-07 08:11:47,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:47,535 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:11:47,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1913325353, now seen corresponding path program 3 times [2021-11-07 08:11:47,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:47,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314616680] [2021-11-07 08:11:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:47,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:47,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:47,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314616680] [2021-11-07 08:11:47,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314616680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:47,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505792055] [2021-11-07 08:11:47,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:11:47,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:47,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:47,786 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:47,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:11:48,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 08:11:48,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:48,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:11:48,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:48,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505792055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:48,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:48,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-11-07 08:11:48,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325267061] [2021-11-07 08:11:48,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:11:48,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:48,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:11:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:11:48,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:11:48,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 266 transitions, 1526 flow. Second operand has 19 states, 19 states have (on average 78.89473684210526) internal successors, (1499), 19 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:48,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:11:48,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:11:48,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:11:49,043 INFO L129 PetriNetUnfolder]: 456/1347 cut-off events. [2021-11-07 08:11:49,043 INFO L130 PetriNetUnfolder]: For 101824/101970 co-relation queries the response was YES. [2021-11-07 08:11:49,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11125 conditions, 1347 events. 456/1347 cut-off events. For 101824/101970 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7362 event pairs, 77 based on Foata normal form. 49/1282 useless extension candidates. Maximal degree in co-relation 11066. Up to 358 conditions per place. [2021-11-07 08:11:49,107 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 16 selfloop transitions, 62 changer transitions 0/278 dead transitions. [2021-11-07 08:11:49,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 278 transitions, 1780 flow [2021-11-07 08:11:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:11:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-07 08:11:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1888 transitions. [2021-11-07 08:11:49,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8740740740740741 [2021-11-07 08:11:49,112 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1888 transitions. [2021-11-07 08:11:49,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1888 transitions. [2021-11-07 08:11:49,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:11:49,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1888 transitions. [2021-11-07 08:11:49,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 78.66666666666667) internal successors, (1888), 24 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:49,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 90.0) internal successors, (2250), 25 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:49,123 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 90.0) internal successors, (2250), 25 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:49,123 INFO L186 Difference]: Start difference. First operand has 227 places, 266 transitions, 1526 flow. Second operand 24 states and 1888 transitions. [2021-11-07 08:11:49,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 278 transitions, 1780 flow [2021-11-07 08:11:49,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 278 transitions, 1624 flow, removed 22 selfloop flow, removed 17 redundant places. [2021-11-07 08:11:49,341 INFO L242 Difference]: Finished difference. Result has 236 places, 269 transitions, 1570 flow [2021-11-07 08:11:49,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1570, PETRI_PLACES=236, PETRI_TRANSITIONS=269} [2021-11-07 08:11:49,342 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 148 predicate places. [2021-11-07 08:11:49,342 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 269 transitions, 1570 flow [2021-11-07 08:11:49,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 78.89473684210526) internal successors, (1499), 19 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:49,343 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:11:49,343 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:49,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:49,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-07 08:11:49,559 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:11:49,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1779560740, now seen corresponding path program 4 times [2021-11-07 08:11:49,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:49,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426358174] [2021-11-07 08:11:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:49,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:49,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:49,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426358174] [2021-11-07 08:11:49,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426358174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:49,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833320562] [2021-11-07 08:11:49,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:11:49,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:49,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:49,815 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:49,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:11:50,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:11:50,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:50,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 08:11:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 117 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:52,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833320562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:52,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:52,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 48 [2021-11-07 08:11:52,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810464467] [2021-11-07 08:11:52,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 08:11:52,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:52,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 08:11:52,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2021, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:11:52,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-07 08:11:52,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 269 transitions, 1570 flow. Second operand has 48 states, 48 states have (on average 59.125) internal successors, (2838), 48 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:52,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:11:52,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-07 08:11:52,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:12:00,462 INFO L129 PetriNetUnfolder]: 1649/3544 cut-off events. [2021-11-07 08:12:00,462 INFO L130 PetriNetUnfolder]: For 310989/311405 co-relation queries the response was YES. [2021-11-07 08:12:00,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31770 conditions, 3544 events. 1649/3544 cut-off events. For 310989/311405 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 21074 event pairs, 0 based on Foata normal form. 176/3528 useless extension candidates. Maximal degree in co-relation 31708. Up to 917 conditions per place. [2021-11-07 08:12:00,585 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 343 selfloop transitions, 541 changer transitions 0/931 dead transitions. [2021-11-07 08:12:00,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 931 transitions, 14911 flow [2021-11-07 08:12:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-11-07 08:12:00,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-11-07 08:12:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 11185 transitions. [2021-11-07 08:12:00,667 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6681600955794504 [2021-11-07 08:12:00,668 INFO L72 ComplementDD]: Start complementDD. Operand 186 states and 11185 transitions. [2021-11-07 08:12:00,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 186 states and 11185 transitions. [2021-11-07 08:12:00,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:12:00,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 186 states and 11185 transitions. [2021-11-07 08:12:00,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 187 states, 186 states have (on average 60.134408602150536) internal successors, (11185), 186 states have internal predecessors, (11185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:00,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 187 states, 187 states have (on average 90.0) internal successors, (16830), 187 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:00,735 INFO L81 ComplementDD]: Finished complementDD. Result has 187 states, 187 states have (on average 90.0) internal successors, (16830), 187 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:00,735 INFO L186 Difference]: Start difference. First operand has 236 places, 269 transitions, 1570 flow. Second operand 186 states and 11185 transitions. [2021-11-07 08:12:00,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 931 transitions, 14911 flow [2021-11-07 08:12:01,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 931 transitions, 14417 flow, removed 125 selfloop flow, removed 20 redundant places. [2021-11-07 08:12:01,608 INFO L242 Difference]: Finished difference. Result has 471 places, 689 transitions, 8650 flow [2021-11-07 08:12:01,609 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=186, PETRI_FLOW=8650, PETRI_PLACES=471, PETRI_TRANSITIONS=689} [2021-11-07 08:12:01,609 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 383 predicate places. [2021-11-07 08:12:01,609 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 689 transitions, 8650 flow [2021-11-07 08:12:01,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 59.125) internal successors, (2838), 48 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:01,611 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:12:01,611 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:01,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:01,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:01,812 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:12:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1747839863, now seen corresponding path program 1 times [2021-11-07 08:12:01,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:01,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584564851] [2021-11-07 08:12:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:01,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:02,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:02,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584564851] [2021-11-07 08:12:02,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584564851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:02,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891457673] [2021-11-07 08:12:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:02,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:02,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:02,041 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:02,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:12:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:02,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:12:02,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:02,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891457673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:02,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:02,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-07 08:12:02,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112748387] [2021-11-07 08:12:02,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:12:02,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:02,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:12:02,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:12:02,786 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:12:02,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 689 transitions, 8650 flow. Second operand has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:02,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:12:02,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:12:02,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:12:04,751 INFO L129 PetriNetUnfolder]: 1088/2847 cut-off events. [2021-11-07 08:12:04,751 INFO L130 PetriNetUnfolder]: For 1359521/1359850 co-relation queries the response was YES. [2021-11-07 08:12:04,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49710 conditions, 2847 events. 1088/2847 cut-off events. For 1359521/1359850 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 17808 event pairs, 12 based on Foata normal form. 23/2687 useless extension candidates. Maximal degree in co-relation 49578. Up to 752 conditions per place. [2021-11-07 08:12:04,925 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 18 selfloop transitions, 155 changer transitions 0/703 dead transitions. [2021-11-07 08:12:04,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 703 transitions, 9146 flow [2021-11-07 08:12:04,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:12:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-07 08:12:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2358 transitions. [2021-11-07 08:12:04,930 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8733333333333333 [2021-11-07 08:12:04,930 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2358 transitions. [2021-11-07 08:12:04,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2358 transitions. [2021-11-07 08:12:04,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:12:04,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2358 transitions. [2021-11-07 08:12:04,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 78.6) internal successors, (2358), 30 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:04,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 90.0) internal successors, (2790), 31 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:04,943 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 90.0) internal successors, (2790), 31 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:04,943 INFO L186 Difference]: Start difference. First operand has 471 places, 689 transitions, 8650 flow. Second operand 30 states and 2358 transitions. [2021-11-07 08:12:04,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 703 transitions, 9146 flow [2021-11-07 08:12:09,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 703 transitions, 5138 flow, removed 1800 selfloop flow, removed 54 redundant places. [2021-11-07 08:12:09,505 INFO L242 Difference]: Finished difference. Result has 449 places, 692 transitions, 5072 flow [2021-11-07 08:12:09,506 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4642, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5072, PETRI_PLACES=449, PETRI_TRANSITIONS=692} [2021-11-07 08:12:09,506 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 361 predicate places. [2021-11-07 08:12:09,507 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 692 transitions, 5072 flow [2021-11-07 08:12:09,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:09,507 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:12:09,507 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:09,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:09,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:12:09,708 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:12:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash -366798908, now seen corresponding path program 2 times [2021-11-07 08:12:09,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:09,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189732843] [2021-11-07 08:12:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:09,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:09,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:09,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189732843] [2021-11-07 08:12:09,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189732843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:09,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472126111] [2021-11-07 08:12:09,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:12:09,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:09,979 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:09,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:12:10,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:12:10,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:12:10,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:12:10,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:10,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472126111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:10,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:10,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-11-07 08:12:10,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065978622] [2021-11-07 08:12:10,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:12:10,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:12:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:12:10,927 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:12:10,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 692 transitions, 5072 flow. Second operand has 25 states, 25 states have (on average 78.92) internal successors, (1973), 25 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:10,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:12:10,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:12:10,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:12:12,715 INFO L129 PetriNetUnfolder]: 1167/3083 cut-off events. [2021-11-07 08:12:12,715 INFO L130 PetriNetUnfolder]: For 1468851/1469300 co-relation queries the response was YES. [2021-11-07 08:12:12,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50830 conditions, 3083 events. 1167/3083 cut-off events. For 1468851/1469300 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 19336 event pairs, 23 based on Foata normal form. 21/2886 useless extension candidates. Maximal degree in co-relation 50694. Up to 693 conditions per place. [2021-11-07 08:12:12,890 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 19 selfloop transitions, 158 changer transitions 0/707 dead transitions. [2021-11-07 08:12:12,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 707 transitions, 5586 flow [2021-11-07 08:12:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:12:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-07 08:12:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2593 transitions. [2021-11-07 08:12:12,896 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8730639730639731 [2021-11-07 08:12:12,896 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2593 transitions. [2021-11-07 08:12:12,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2593 transitions. [2021-11-07 08:12:12,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:12:12,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2593 transitions. [2021-11-07 08:12:12,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 78.57575757575758) internal successors, (2593), 33 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:12,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 90.0) internal successors, (3060), 34 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:12,915 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 90.0) internal successors, (3060), 34 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:12,915 INFO L186 Difference]: Start difference. First operand has 449 places, 692 transitions, 5072 flow. Second operand 33 states and 2593 transitions. [2021-11-07 08:12:12,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 707 transitions, 5586 flow [2021-11-07 08:12:19,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 707 transitions, 5216 flow, removed 40 selfloop flow, removed 25 redundant places. [2021-11-07 08:12:19,935 INFO L242 Difference]: Finished difference. Result has 459 places, 695 transitions, 5136 flow [2021-11-07 08:12:19,936 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4702, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5136, PETRI_PLACES=459, PETRI_TRANSITIONS=695} [2021-11-07 08:12:19,936 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 371 predicate places. [2021-11-07 08:12:19,936 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 695 transitions, 5136 flow [2021-11-07 08:12:19,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 78.92) internal successors, (1973), 25 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:19,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:12:19,937 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:19,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:20,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:12:20,138 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:12:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash 522062889, now seen corresponding path program 3 times [2021-11-07 08:12:20,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:20,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405137001] [2021-11-07 08:12:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:20,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:20,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:20,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405137001] [2021-11-07 08:12:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405137001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:20,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209201579] [2021-11-07 08:12:20,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:12:20,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:20,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:20,461 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:20,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:12:21,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-07 08:12:21,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:12:21,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 08:12:21,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:21,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209201579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:21,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:21,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-11-07 08:12:21,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281480602] [2021-11-07 08:12:21,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:12:21,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:21,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:12:21,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:12:21,406 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:12:21,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 695 transitions, 5136 flow. Second operand has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:21,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:12:21,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:12:21,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:12:23,236 INFO L129 PetriNetUnfolder]: 1235/3143 cut-off events. [2021-11-07 08:12:23,236 INFO L130 PetriNetUnfolder]: For 1585288/1585819 co-relation queries the response was YES. [2021-11-07 08:12:23,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54782 conditions, 3143 events. 1235/3143 cut-off events. For 1585288/1585819 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 19112 event pairs, 31 based on Foata normal form. 21/2936 useless extension candidates. Maximal degree in co-relation 54643. Up to 750 conditions per place. [2021-11-07 08:12:23,415 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 20 selfloop transitions, 161 changer transitions 0/711 dead transitions. [2021-11-07 08:12:23,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 711 transitions, 5668 flow [2021-11-07 08:12:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:12:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-07 08:12:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2828 transitions. [2021-11-07 08:12:23,420 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8728395061728395 [2021-11-07 08:12:23,420 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2828 transitions. [2021-11-07 08:12:23,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2828 transitions. [2021-11-07 08:12:23,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:12:23,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2828 transitions. [2021-11-07 08:12:23,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 78.55555555555556) internal successors, (2828), 36 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:23,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:23,432 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:23,433 INFO L186 Difference]: Start difference. First operand has 459 places, 695 transitions, 5136 flow. Second operand 36 states and 2828 transitions. [2021-11-07 08:12:23,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 711 transitions, 5668 flow [2021-11-07 08:12:30,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 711 transitions, 5272 flow, removed 43 selfloop flow, removed 29 redundant places. [2021-11-07 08:12:30,690 INFO L242 Difference]: Finished difference. Result has 468 places, 698 transitions, 5186 flow [2021-11-07 08:12:30,691 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5186, PETRI_PLACES=468, PETRI_TRANSITIONS=698} [2021-11-07 08:12:30,692 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 380 predicate places. [2021-11-07 08:12:30,692 INFO L470 AbstractCegarLoop]: Abstraction has has 468 places, 698 transitions, 5186 flow [2021-11-07 08:12:30,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:30,693 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:12:30,693 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:30,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:30,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:12:30,913 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:12:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1609652580, now seen corresponding path program 4 times [2021-11-07 08:12:30,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:30,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749228701] [2021-11-07 08:12:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:30,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:31,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:31,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749228701] [2021-11-07 08:12:31,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749228701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:31,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963000269] [2021-11-07 08:12:31,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:12:31,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:31,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:31,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:31,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:12:31,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:12:31,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:12:31,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 08:12:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 335 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:34,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963000269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:34,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:34,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 43] total 68 [2021-11-07 08:12:34,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777727008] [2021-11-07 08:12:34,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-07 08:12:34,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:34,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-07 08:12:34,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=4084, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 08:12:34,569 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-07 08:12:34,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 698 transitions, 5186 flow. Second operand has 68 states, 68 states have (on average 59.029411764705884) internal successors, (4014), 68 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:34,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:12:34,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-07 08:12:34,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:12:45,960 INFO L129 PetriNetUnfolder]: 2883/5915 cut-off events. [2021-11-07 08:12:45,960 INFO L130 PetriNetUnfolder]: For 3622519/3623964 co-relation queries the response was YES. [2021-11-07 08:12:46,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116319 conditions, 5915 events. 2883/5915 cut-off events. For 3622519/3623964 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 36225 event pairs, 35 based on Foata normal form. 318/5913 useless extension candidates. Maximal degree in co-relation 116177. Up to 1478 conditions per place. [2021-11-07 08:12:46,347 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 974 selfloop transitions, 555 changer transitions 0/1576 dead transitions. [2021-11-07 08:12:46,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 1576 transitions, 47809 flow [2021-11-07 08:12:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-11-07 08:12:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-11-07 08:12:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 11750 transitions. [2021-11-07 08:12:46,366 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6695156695156695 [2021-11-07 08:12:46,366 INFO L72 ComplementDD]: Start complementDD. Operand 195 states and 11750 transitions. [2021-11-07 08:12:46,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 195 states and 11750 transitions. [2021-11-07 08:12:46,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:12:46,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 195 states and 11750 transitions. [2021-11-07 08:12:46,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 196 states, 195 states have (on average 60.256410256410255) internal successors, (11750), 195 states have internal predecessors, (11750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:46,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 196 states, 196 states have (on average 90.0) internal successors, (17640), 196 states have internal predecessors, (17640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:46,425 INFO L81 ComplementDD]: Finished complementDD. Result has 196 states, 196 states have (on average 90.0) internal successors, (17640), 196 states have internal predecessors, (17640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:46,425 INFO L186 Difference]: Start difference. First operand has 468 places, 698 transitions, 5186 flow. Second operand 195 states and 11750 transitions. [2021-11-07 08:12:46,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 1576 transitions, 47809 flow [2021-11-07 08:12:58,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 1576 transitions, 46939 flow, removed 184 selfloop flow, removed 32 redundant places. [2021-11-07 08:12:58,906 INFO L242 Difference]: Finished difference. Result has 735 places, 1118 transitions, 22687 flow [2021-11-07 08:12:58,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=195, PETRI_FLOW=22687, PETRI_PLACES=735, PETRI_TRANSITIONS=1118} [2021-11-07 08:12:58,908 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 647 predicate places. [2021-11-07 08:12:58,908 INFO L470 AbstractCegarLoop]: Abstraction has has 735 places, 1118 transitions, 22687 flow [2021-11-07 08:12:58,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 59.029411764705884) internal successors, (4014), 68 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:58,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:12:58,909 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:58,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:59,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:12:59,110 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:12:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:59,110 INFO L85 PathProgramCache]: Analyzing trace with hash -254102967, now seen corresponding path program 5 times [2021-11-07 08:12:59,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:59,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957869880] [2021-11-07 08:12:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:59,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:59,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:59,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957869880] [2021-11-07 08:12:59,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957869880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:59,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150262920] [2021-11-07 08:12:59,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:12:59,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:59,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:59,486 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:59,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:13:00,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-07 08:13:00,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:00,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 08:13:00,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:00,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150262920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:00,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:00,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-11-07 08:13:00,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193418509] [2021-11-07 08:13:00,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:13:00,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:00,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:13:00,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:13:00,507 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:13:00,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 1118 transitions, 22687 flow. Second operand has 31 states, 31 states have (on average 78.93548387096774) internal successors, (2447), 31 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:00,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:13:00,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:13:00,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:13:06,054 INFO L129 PetriNetUnfolder]: 1888/4851 cut-off events. [2021-11-07 08:13:06,054 INFO L130 PetriNetUnfolder]: For 9193484/9194975 co-relation queries the response was YES. [2021-11-07 08:13:06,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158458 conditions, 4851 events. 1888/4851 cut-off events. For 9193484/9194975 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 32450 event pairs, 56 based on Foata normal form. 25/4489 useless extension candidates. Maximal degree in co-relation 158211. Up to 1252 conditions per place. [2021-11-07 08:13:06,570 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 22 selfloop transitions, 278 changer transitions 0/1136 dead transitions. [2021-11-07 08:13:06,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 1136 transitions, 23501 flow [2021-11-07 08:13:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:13:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-07 08:13:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3298 transitions. [2021-11-07 08:13:06,584 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8724867724867725 [2021-11-07 08:13:06,584 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3298 transitions. [2021-11-07 08:13:06,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3298 transitions. [2021-11-07 08:13:06,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:13:06,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3298 transitions. [2021-11-07 08:13:06,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 78.52380952380952) internal successors, (3298), 42 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:06,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 90.0) internal successors, (3870), 43 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:06,599 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 90.0) internal successors, (3870), 43 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:06,599 INFO L186 Difference]: Start difference. First operand has 735 places, 1118 transitions, 22687 flow. Second operand 42 states and 3298 transitions. [2021-11-07 08:13:06,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 1136 transitions, 23501 flow [2021-11-07 08:14:27,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 1136 transitions, 9151 flow, removed 7128 selfloop flow, removed 11 redundant places. [2021-11-07 08:14:27,755 INFO L242 Difference]: Finished difference. Result has 768 places, 1121 transitions, 9053 flow [2021-11-07 08:14:27,756 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=9053, PETRI_PLACES=768, PETRI_TRANSITIONS=1121} [2021-11-07 08:14:27,757 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 680 predicate places. [2021-11-07 08:14:27,757 INFO L470 AbstractCegarLoop]: Abstraction has has 768 places, 1121 transitions, 9053 flow [2021-11-07 08:14:27,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 78.93548387096774) internal successors, (2447), 31 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:27,758 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:14:27,758 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:27,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:27,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:14:27,987 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:14:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:27,988 INFO L85 PathProgramCache]: Analyzing trace with hash 337783618, now seen corresponding path program 6 times [2021-11-07 08:14:27,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:27,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283300717] [2021-11-07 08:14:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:27,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:28,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:28,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283300717] [2021-11-07 08:14:28,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283300717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:28,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595226736] [2021-11-07 08:14:28,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:14:28,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:28,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:28,398 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:28,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:14:29,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-07 08:14:29,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:29,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 08:14:29,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:29,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595226736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:29,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:29,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-11-07 08:14:29,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215842734] [2021-11-07 08:14:29,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 08:14:29,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:29,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 08:14:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:14:29,539 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:14:29,542 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 1121 transitions, 9053 flow. Second operand has 33 states, 33 states have (on average 78.93939393939394) internal successors, (2605), 33 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:29,542 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:14:29,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:14:29,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:14:35,469 INFO L129 PetriNetUnfolder]: 1975/4877 cut-off events. [2021-11-07 08:14:35,469 INFO L130 PetriNetUnfolder]: For 9332136/9333284 co-relation queries the response was YES. [2021-11-07 08:14:35,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159480 conditions, 4877 events. 1975/4877 cut-off events. For 9332136/9333284 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 31634 event pairs, 69 based on Foata normal form. 25/4507 useless extension candidates. Maximal degree in co-relation 159229. Up to 1230 conditions per place. [2021-11-07 08:14:36,190 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 23 selfloop transitions, 281 changer transitions 0/1140 dead transitions. [2021-11-07 08:14:36,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 1140 transitions, 9885 flow [2021-11-07 08:14:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 08:14:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-07 08:14:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3533 transitions. [2021-11-07 08:14:36,194 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8723456790123457 [2021-11-07 08:14:36,194 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3533 transitions. [2021-11-07 08:14:36,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3533 transitions. [2021-11-07 08:14:36,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:14:36,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3533 transitions. [2021-11-07 08:14:36,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 78.5111111111111) internal successors, (3533), 45 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 90.0) internal successors, (4140), 46 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,208 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 90.0) internal successors, (4140), 46 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,208 INFO L186 Difference]: Start difference. First operand has 768 places, 1121 transitions, 9053 flow. Second operand 45 states and 3533 transitions. [2021-11-07 08:14:36,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 1140 transitions, 9885 flow [2021-11-07 08:15:54,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1140 transitions, 9230 flow, removed 58 selfloop flow, removed 37 redundant places. [2021-11-07 08:15:54,951 INFO L242 Difference]: Finished difference. Result has 778 places, 1124 transitions, 9120 flow [2021-11-07 08:15:54,953 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=9120, PETRI_PLACES=778, PETRI_TRANSITIONS=1124} [2021-11-07 08:15:54,953 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 690 predicate places. [2021-11-07 08:15:54,953 INFO L470 AbstractCegarLoop]: Abstraction has has 778 places, 1124 transitions, 9120 flow [2021-11-07 08:15:54,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.93939393939394) internal successors, (2605), 33 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:54,954 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:15:54,954 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:54,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:55,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:55,155 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:15:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:55,155 INFO L85 PathProgramCache]: Analyzing trace with hash -377637117, now seen corresponding path program 7 times [2021-11-07 08:15:55,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:55,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924912845] [2021-11-07 08:15:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:55,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:55,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:55,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924912845] [2021-11-07 08:15:55,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924912845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:55,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723353968] [2021-11-07 08:15:55,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:15:55,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:55,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:55,567 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:55,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:15:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 08:15:56,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:56,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723353968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:56,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:56,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-11-07 08:15:56,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242628591] [2021-11-07 08:15:56,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:15:56,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:15:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:15:56,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:15:56,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1124 transitions, 9120 flow. Second operand has 35 states, 35 states have (on average 78.94285714285714) internal successors, (2763), 35 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:56,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:15:56,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:15:56,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:16:02,554 INFO L129 PetriNetUnfolder]: 2093/5286 cut-off events. [2021-11-07 08:16:02,554 INFO L130 PetriNetUnfolder]: For 10278664/10280237 co-relation queries the response was YES. [2021-11-07 08:16:03,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 173916 conditions, 5286 events. 2093/5286 cut-off events. For 10278664/10280237 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 34839 event pairs, 82 based on Foata normal form. 25/4855 useless extension candidates. Maximal degree in co-relation 173662. Up to 1348 conditions per place. [2021-11-07 08:16:03,539 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 24 selfloop transitions, 284 changer transitions 0/1144 dead transitions. [2021-11-07 08:16:03,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 1144 transitions, 9970 flow [2021-11-07 08:16:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 08:16:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-11-07 08:16:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3768 transitions. [2021-11-07 08:16:03,543 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8722222222222222 [2021-11-07 08:16:03,544 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3768 transitions. [2021-11-07 08:16:03,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3768 transitions. [2021-11-07 08:16:03,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:16:03,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3768 transitions. [2021-11-07 08:16:03,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 78.5) internal successors, (3768), 48 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:03,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 90.0) internal successors, (4410), 49 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:03,557 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 90.0) internal successors, (4410), 49 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:03,557 INFO L186 Difference]: Start difference. First operand has 778 places, 1124 transitions, 9120 flow. Second operand 48 states and 3768 transitions. [2021-11-07 08:16:03,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 1144 transitions, 9970 flow [2021-11-07 08:18:01,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 1144 transitions, 9292 flow, removed 61 selfloop flow, removed 41 redundant places. [2021-11-07 08:18:01,794 INFO L242 Difference]: Finished difference. Result has 787 places, 1127 transitions, 9176 flow [2021-11-07 08:18:01,795 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8442, PETRI_DIFFERENCE_MINUEND_PLACES=737, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=9176, PETRI_PLACES=787, PETRI_TRANSITIONS=1127} [2021-11-07 08:18:01,796 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 699 predicate places. [2021-11-07 08:18:01,796 INFO L470 AbstractCegarLoop]: Abstraction has has 787 places, 1127 transitions, 9176 flow [2021-11-07 08:18:01,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 78.94285714285714) internal successors, (2763), 35 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:01,797 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:18:01,797 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:01,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:18:02,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:18:02,003 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:18:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1909233674, now seen corresponding path program 8 times [2021-11-07 08:18:02,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:02,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599515011] [2021-11-07 08:18:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:02,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:18:02,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:02,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599515011] [2021-11-07 08:18:02,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599515011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:02,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210797887] [2021-11-07 08:18:02,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:18:02,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:02,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:02,631 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:02,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:18:03,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:18:03,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:18:03,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 08:18:03,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:18:04,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210797887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:04,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:18:04,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-11-07 08:18:04,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856920564] [2021-11-07 08:18:04,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 08:18:04,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 08:18:04,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:18:04,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:18:04,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 1127 transitions, 9176 flow. Second operand has 37 states, 37 states have (on average 78.94594594594595) internal successors, (2921), 37 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:04,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:18:04,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:18:04,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:18:10,116 INFO L129 PetriNetUnfolder]: 2182/5532 cut-off events. [2021-11-07 08:18:10,116 INFO L130 PetriNetUnfolder]: For 10966108/10968120 co-relation queries the response was YES. [2021-11-07 08:18:10,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183543 conditions, 5532 events. 2182/5532 cut-off events. For 10966108/10968120 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 36494 event pairs, 95 based on Foata normal form. 25/5069 useless extension candidates. Maximal degree in co-relation 183286. Up to 1437 conditions per place. [2021-11-07 08:18:10,724 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 25 selfloop transitions, 287 changer transitions 0/1148 dead transitions. [2021-11-07 08:18:10,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 837 places, 1148 transitions, 10044 flow [2021-11-07 08:18:10,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 08:18:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-11-07 08:18:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4003 transitions. [2021-11-07 08:18:10,727 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8721132897603486 [2021-11-07 08:18:10,728 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4003 transitions. [2021-11-07 08:18:10,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4003 transitions. [2021-11-07 08:18:10,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:18:10,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4003 transitions. [2021-11-07 08:18:10,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 78.49019607843137) internal successors, (4003), 51 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:10,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 90.0) internal successors, (4680), 52 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:10,740 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 90.0) internal successors, (4680), 52 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:10,740 INFO L186 Difference]: Start difference. First operand has 787 places, 1127 transitions, 9176 flow. Second operand 51 states and 4003 transitions. [2021-11-07 08:18:10,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 837 places, 1148 transitions, 10044 flow [2021-11-07 08:20:19,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 1148 transitions, 9354 flow, removed 64 selfloop flow, removed 44 redundant places. [2021-11-07 08:20:19,908 INFO L242 Difference]: Finished difference. Result has 796 places, 1130 transitions, 9232 flow [2021-11-07 08:20:19,910 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8486, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9232, PETRI_PLACES=796, PETRI_TRANSITIONS=1130} [2021-11-07 08:20:19,910 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 708 predicate places. [2021-11-07 08:20:19,910 INFO L470 AbstractCegarLoop]: Abstraction has has 796 places, 1130 transitions, 9232 flow [2021-11-07 08:20:19,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 78.94594594594595) internal successors, (2921), 37 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:19,911 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:20:19,912 INFO L254 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:19,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:20,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:20:20,127 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:20:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:20,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1431752995, now seen corresponding path program 9 times [2021-11-07 08:20:20,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:20,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405431871] [2021-11-07 08:20:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:20,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:20,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:20,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405431871] [2021-11-07 08:20:20,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405431871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:20,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692764303] [2021-11-07 08:20:20,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:20:20,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:20,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:20,743 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:20,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:20:21,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-07 08:20:21,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:20:21,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 08:20:21,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:22,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692764303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:22,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:22,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-11-07 08:20:22,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425895107] [2021-11-07 08:20:22,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 08:20:22,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 08:20:22,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:20:22,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-07 08:20:22,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 1130 transitions, 9232 flow. Second operand has 39 states, 39 states have (on average 78.94871794871794) internal successors, (3079), 39 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:22,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:20:22,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-07 08:20:22,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-07 08:20:28,559 INFO L129 PetriNetUnfolder]: 2293/5847 cut-off events. [2021-11-07 08:20:28,559 INFO L130 PetriNetUnfolder]: For 11801646/11803916 co-relation queries the response was YES. [2021-11-07 08:20:29,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196757 conditions, 5847 events. 2293/5847 cut-off events. For 11801646/11803916 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 38735 event pairs, 108 based on Foata normal form. 24/5337 useless extension candidates. Maximal degree in co-relation 196497. Up to 1548 conditions per place. [2021-11-07 08:20:30,638 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 26 selfloop transitions, 290 changer transitions 0/1152 dead transitions. [2021-11-07 08:20:30,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 1152 transitions, 10118 flow [2021-11-07 08:20:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 08:20:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-11-07 08:20:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4238 transitions. [2021-11-07 08:20:30,663 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8720164609053498 [2021-11-07 08:20:30,677 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4238 transitions. [2021-11-07 08:20:30,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4238 transitions. [2021-11-07 08:20:30,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 08:20:30,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4238 transitions. [2021-11-07 08:20:30,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 78.48148148148148) internal successors, (4238), 54 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:30,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 90.0) internal successors, (4950), 55 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:30,711 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 90.0) internal successors, (4950), 55 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:30,711 INFO L186 Difference]: Start difference. First operand has 796 places, 1130 transitions, 9232 flow. Second operand 54 states and 4238 transitions. [2021-11-07 08:20:30,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 1152 transitions, 10118 flow [2021-11-07 08:23:05,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 1152 transitions, 9416 flow, removed 67 selfloop flow, removed 47 redundant places. [2021-11-07 08:23:05,629 INFO L242 Difference]: Finished difference. Result has 805 places, 1133 transitions, 9288 flow [2021-11-07 08:23:05,630 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8530, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=9288, PETRI_PLACES=805, PETRI_TRANSITIONS=1133} [2021-11-07 08:23:05,631 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 717 predicate places. [2021-11-07 08:23:05,631 INFO L470 AbstractCegarLoop]: Abstraction has has 805 places, 1133 transitions, 9288 flow [2021-11-07 08:23:05,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.94871794871794) internal successors, (3079), 39 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:05,631 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-07 08:23:05,632 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:23:05,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:05,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:05,832 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 08:23:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash 8348418, now seen corresponding path program 10 times [2021-11-07 08:23:05,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:23:05,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128675078] [2021-11-07 08:23:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:05,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:23:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:23:06,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:23:06,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128675078] [2021-11-07 08:23:06,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128675078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:06,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269429703] [2021-11-07 08:23:06,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:23:06,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:06,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:23:06,496 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:23:06,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_854a714a-cf69-4cb3-8d5a-10698fe133a2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:23:07,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:23:07,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:23:07,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 08:23:07,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 840 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:23:12,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269429703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:12,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:23:12,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 61] total 98 [2021-11-07 08:23:12,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533304003] [2021-11-07 08:23:12,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-07 08:23:12,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:23:12,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-07 08:23:12,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=8557, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 08:23:12,557 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-07 08:23:12,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 805 places, 1133 transitions, 9288 flow. Second operand has 98 states, 98 states have (on average 58.95918367346939) internal successors, (5778), 98 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:12,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-07 08:23:12,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-07 08:23:12,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand