./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN --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 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:36:06,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:36:06,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:36:06,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:36:06,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:36:06,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:36:06,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:36:06,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:36:06,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:36:06,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:36:06,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:36:06,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:36:06,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:36:06,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:36:06,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:36:06,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:36:06,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:36:06,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:36:06,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:36:06,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:36:06,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:36:06,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:36:06,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:36:06,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:36:06,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:36:06,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:36:06,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:36:06,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:36:06,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:36:06,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:36:06,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:36:06,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:36:06,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:36:06,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:36:06,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:36:06,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:36:06,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:36:06,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:36:06,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:36:06,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:36:06,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:36:06,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:36:07,005 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:36:07,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:36:07,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:36:07,007 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:36:07,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:36:07,008 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:36:07,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:36:07,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:36:07,009 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:36:07,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:36:07,010 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:36:07,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:36:07,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:36:07,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:36:07,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:36:07,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:36:07,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:36:07,012 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:36:07,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:36:07,012 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:36:07,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:36:07,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:36:07,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:36:07,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:36:07,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:36:07,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:36:07,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:36:07,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:36:07,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:36:07,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:36:07,015 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:36:07,016 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:36:07,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:36:07,016 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_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc [2022-11-20 11:36:07,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:36:07,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:36:07,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:36:07,373 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:36:07,374 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:36:07,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2022-11-20 11:36:10,483 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:36:10,868 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:36:10,868 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2022-11-20 11:36:10,885 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/data/70722df9d/2fe1ba13113d47a08705df31d5b6f74b/FLAG3c7775f4d [2022-11-20 11:36:10,903 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/data/70722df9d/2fe1ba13113d47a08705df31d5b6f74b [2022-11-20 11:36:10,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:36:10,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:36:10,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:36:10,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:36:10,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:36:10,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:10" (1/1) ... [2022-11-20 11:36:10,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27902c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:10, skipping insertion in model container [2022-11-20 11:36:10,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:10" (1/1) ... [2022-11-20 11:36:10,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:36:10,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:36:11,474 WARN L237 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_52523146-ea11-449f-b135-fe6974e569c7/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i[41322,41335] [2022-11-20 11:36:11,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:36:11,521 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:36:11,559 WARN L237 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_52523146-ea11-449f-b135-fe6974e569c7/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i[41322,41335] [2022-11-20 11:36:11,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:36:11,627 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:36:11,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11 WrapperNode [2022-11-20 11:36:11,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:36:11,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:36:11,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:36:11,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:36:11,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,680 INFO L138 Inliner]: procedures = 270, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-11-20 11:36:11,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:36:11,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:36:11,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:36:11,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:36:11,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,711 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:36:11,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:36:11,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:36:11,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:36:11,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (1/1) ... [2022-11-20 11:36:11,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:36:11,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:11,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:36:11,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:36:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:36:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:36:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:36:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:36:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:36:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:36:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 11:36:11,826 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 11:36:11,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:36:11,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:36:11,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:36:11,829 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:36:12,070 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:36:12,072 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:36:12,300 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:36:12,322 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:36:12,324 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-20 11:36:12,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:12 BoogieIcfgContainer [2022-11-20 11:36:12,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:36:12,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:36:12,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:36:12,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:36:12,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:36:10" (1/3) ... [2022-11-20 11:36:12,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c80fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:12, skipping insertion in model container [2022-11-20 11:36:12,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:11" (2/3) ... [2022-11-20 11:36:12,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c80fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:12, skipping insertion in model container [2022-11-20 11:36:12,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:12" (3/3) ... [2022-11-20 11:36:12,355 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2022-11-20 11:36:12,365 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:36:12,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:36:12,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:36:12,381 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:36:12,452 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 11:36:12,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 124 transitions, 256 flow [2022-11-20 11:36:12,570 INFO L130 PetriNetUnfolder]: 23/169 cut-off events. [2022-11-20 11:36:12,571 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:36:12,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 169 events. 23/169 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 385 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2022-11-20 11:36:12,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 124 transitions, 256 flow [2022-11-20 11:36:12,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 119 transitions, 243 flow [2022-11-20 11:36:12,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:36:12,603 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@487f6dd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:36:12,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:36:12,681 INFO L130 PetriNetUnfolder]: 8/107 cut-off events. [2022-11-20 11:36:12,685 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:36:12,686 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:12,686 INFO L209 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] [2022-11-20 11:36:12,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash 98344418, now seen corresponding path program 1 times [2022-11-20 11:36:12,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:12,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465593041] [2022-11-20 11:36:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:12,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:12,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:12,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465593041] [2022-11-20 11:36:12,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465593041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:12,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:12,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:36:12,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378242057] [2022-11-20 11:36:12,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:12,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:36:12,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:36:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:36:13,021 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 124 [2022-11-20 11:36:13,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 119 transitions, 243 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:13,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 124 [2022-11-20 11:36:13,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:13,073 INFO L130 PetriNetUnfolder]: 6/146 cut-off events. [2022-11-20 11:36:13,073 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:36:13,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 146 events. 6/146 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 310 event pairs, 0 based on Foata normal form. 16/150 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2022-11-20 11:36:13,075 INFO L137 encePairwiseOnDemand]: 113/124 looper letters, 1 selfloop transitions, 0 changer transitions 19/107 dead transitions. [2022-11-20 11:36:13,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 107 transitions, 221 flow [2022-11-20 11:36:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:36:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:36:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 232 transitions. [2022-11-20 11:36:13,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9354838709677419 [2022-11-20 11:36:13,098 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 232 transitions. [2022-11-20 11:36:13,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 232 transitions. [2022-11-20 11:36:13,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:13,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 232 transitions. [2022-11-20 11:36:13,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 116.0) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,112 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,114 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 243 flow. Second operand 2 states and 232 transitions. [2022-11-20 11:36:13,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 107 transitions, 221 flow [2022-11-20 11:36:13,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 107 transitions, 221 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:36:13,130 INFO L231 Difference]: Finished difference. Result has 108 places, 88 transitions, 181 flow [2022-11-20 11:36:13,132 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=181, PETRI_PLACES=108, PETRI_TRANSITIONS=88} [2022-11-20 11:36:13,136 INFO L288 CegarLoopForPetriNet]: 108 programPoint places, 0 predicate places. [2022-11-20 11:36:13,137 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 88 transitions, 181 flow [2022-11-20 11:36:13,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,138 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:13,138 INFO L209 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] [2022-11-20 11:36:13,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:36:13,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash -195058589, now seen corresponding path program 1 times [2022-11-20 11:36:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:13,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007841943] [2022-11-20 11:36:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:13,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:13,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007841943] [2022-11-20 11:36:13,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007841943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:13,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:13,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:13,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276262259] [2022-11-20 11:36:13,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:13,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:13,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:13,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:13,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:13,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 124 [2022-11-20 11:36:13,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 88 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:13,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 124 [2022-11-20 11:36:13,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:13,448 INFO L130 PetriNetUnfolder]: 1/92 cut-off events. [2022-11-20 11:36:13,448 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:36:13,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 92 events. 1/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2022-11-20 11:36:13,449 INFO L137 encePairwiseOnDemand]: 121/124 looper letters, 8 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2022-11-20 11:36:13,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 90 transitions, 205 flow [2022-11-20 11:36:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:36:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2022-11-20 11:36:13,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8602150537634409 [2022-11-20 11:36:13,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2022-11-20 11:36:13,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2022-11-20 11:36:13,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:13,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2022-11-20 11:36:13,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,460 INFO L175 Difference]: Start difference. First operand has 108 places, 88 transitions, 181 flow. Second operand 3 states and 320 transitions. [2022-11-20 11:36:13,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 90 transitions, 205 flow [2022-11-20 11:36:13,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:36:13,463 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 189 flow [2022-11-20 11:36:13,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2022-11-20 11:36:13,464 INFO L288 CegarLoopForPetriNet]: 108 programPoint places, -14 predicate places. [2022-11-20 11:36:13,465 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 189 flow [2022-11-20 11:36:13,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,465 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:13,466 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:36:13,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:36:13,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:13,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:13,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1921227953, now seen corresponding path program 1 times [2022-11-20 11:36:13,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:13,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061589661] [2022-11-20 11:36:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:13,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:36:13,504 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:36:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:36:13,552 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:36:13,552 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:36:13,554 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:36:13,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:36:13,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:36:13,557 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 11:36:13,560 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:36:13,560 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 11:36:13,589 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:36:13,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 154 transitions, 326 flow [2022-11-20 11:36:13,645 INFO L130 PetriNetUnfolder]: 40/269 cut-off events. [2022-11-20 11:36:13,646 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 11:36:13,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 269 events. 40/269 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 772 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 171. Up to 9 conditions per place. [2022-11-20 11:36:13,649 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 154 transitions, 326 flow [2022-11-20 11:36:13,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 154 transitions, 326 flow [2022-11-20 11:36:13,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:36:13,655 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@487f6dd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:36:13,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:36:13,688 INFO L130 PetriNetUnfolder]: 8/107 cut-off events. [2022-11-20 11:36:13,688 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:36:13,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:13,688 INFO L209 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] [2022-11-20 11:36:13,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:13,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1482456478, now seen corresponding path program 1 times [2022-11-20 11:36:13,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:13,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707742166] [2022-11-20 11:36:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:13,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:13,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:13,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707742166] [2022-11-20 11:36:13,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707742166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:13,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:13,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:36:13,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755346374] [2022-11-20 11:36:13,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:13,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:36:13,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:13,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:36:13,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:36:13,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 154 [2022-11-20 11:36:13,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 326 flow. Second operand has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:13,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 154 [2022-11-20 11:36:13,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:13,861 INFO L130 PetriNetUnfolder]: 12/238 cut-off events. [2022-11-20 11:36:13,861 INFO L131 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-11-20 11:36:13,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 238 events. 12/238 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 667 event pairs, 0 based on Foata normal form. 42/261 useless extension candidates. Maximal degree in co-relation 155. Up to 7 conditions per place. [2022-11-20 11:36:13,867 INFO L137 encePairwiseOnDemand]: 137/154 looper letters, 2 selfloop transitions, 0 changer transitions 25/136 dead transitions. [2022-11-20 11:36:13,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 136 transitions, 298 flow [2022-11-20 11:36:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:36:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:36:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 285 transitions. [2022-11-20 11:36:13,878 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9253246753246753 [2022-11-20 11:36:13,878 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 285 transitions. [2022-11-20 11:36:13,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 285 transitions. [2022-11-20 11:36:13,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:13,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 285 transitions. [2022-11-20 11:36:13,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 142.5) internal successors, (285), 2 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,886 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,886 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 326 flow. Second operand 2 states and 285 transitions. [2022-11-20 11:36:13,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 136 transitions, 298 flow [2022-11-20 11:36:13,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 136 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:36:13,895 INFO L231 Difference]: Finished difference. Result has 137 places, 111 transitions, 234 flow [2022-11-20 11:36:13,895 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=234, PETRI_PLACES=137, PETRI_TRANSITIONS=111} [2022-11-20 11:36:13,900 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, 0 predicate places. [2022-11-20 11:36:13,900 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 111 transitions, 234 flow [2022-11-20 11:36:13,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:13,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:13,901 INFO L209 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] [2022-11-20 11:36:13,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:36:13,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:13,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:13,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1775859485, now seen corresponding path program 1 times [2022-11-20 11:36:13,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:13,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696530854] [2022-11-20 11:36:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:13,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:14,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:14,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696530854] [2022-11-20 11:36:14,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696530854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:14,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:14,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:14,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337049628] [2022-11-20 11:36:14,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:14,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:14,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:14,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:14,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:14,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 154 [2022-11-20 11:36:14,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 111 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:14,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 154 [2022-11-20 11:36:14,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:14,112 INFO L130 PetriNetUnfolder]: 2/140 cut-off events. [2022-11-20 11:36:14,112 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:36:14,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 140 events. 2/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 163. Up to 12 conditions per place. [2022-11-20 11:36:14,113 INFO L137 encePairwiseOnDemand]: 151/154 looper letters, 11 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2022-11-20 11:36:14,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 268 flow [2022-11-20 11:36:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:36:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2022-11-20 11:36:14,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.841991341991342 [2022-11-20 11:36:14,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2022-11-20 11:36:14,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2022-11-20 11:36:14,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:14,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2022-11-20 11:36:14,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,122 INFO L175 Difference]: Start difference. First operand has 137 places, 111 transitions, 234 flow. Second operand 3 states and 389 transitions. [2022-11-20 11:36:14,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 268 flow [2022-11-20 11:36:14,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 115 transitions, 266 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-20 11:36:14,129 INFO L231 Difference]: Finished difference. Result has 119 places, 112 transitions, 244 flow [2022-11-20 11:36:14,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=119, PETRI_TRANSITIONS=112} [2022-11-20 11:36:14,130 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -18 predicate places. [2022-11-20 11:36:14,130 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 112 transitions, 244 flow [2022-11-20 11:36:14,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,131 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:14,131 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:14,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:36:14,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:14,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1486161730, now seen corresponding path program 1 times [2022-11-20 11:36:14,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:14,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832163942] [2022-11-20 11:36:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:14,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:14,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:14,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832163942] [2022-11-20 11:36:14,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832163942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:14,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012694046] [2022-11-20 11:36:14,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:14,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:14,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:14,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:14,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:36:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:14,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:36:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:36:14,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:36:14,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012694046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:14,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:36:14,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:36:14,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493907294] [2022-11-20 11:36:14,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:14,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:14,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:14,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:36:14,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 154 [2022-11-20 11:36:14,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 112 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:14,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 154 [2022-11-20 11:36:14,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:14,516 INFO L130 PetriNetUnfolder]: 0/142 cut-off events. [2022-11-20 11:36:14,516 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 11:36:14,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 142 events. 0/142 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 249 event pairs, 0 based on Foata normal form. 2/142 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-20 11:36:14,517 INFO L137 encePairwiseOnDemand]: 152/154 looper letters, 6 selfloop transitions, 0 changer transitions 1/112 dead transitions. [2022-11-20 11:36:14,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 112 transitions, 258 flow [2022-11-20 11:36:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:36:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2022-11-20 11:36:14,520 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8225108225108225 [2022-11-20 11:36:14,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2022-11-20 11:36:14,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2022-11-20 11:36:14,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:14,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2022-11-20 11:36:14,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,525 INFO L175 Difference]: Start difference. First operand has 119 places, 112 transitions, 244 flow. Second operand 3 states and 380 transitions. [2022-11-20 11:36:14,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 112 transitions, 258 flow [2022-11-20 11:36:14,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 112 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:36:14,529 INFO L231 Difference]: Finished difference. Result has 121 places, 111 transitions, 242 flow [2022-11-20 11:36:14,529 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=121, PETRI_TRANSITIONS=111} [2022-11-20 11:36:14,534 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -16 predicate places. [2022-11-20 11:36:14,535 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 111 transitions, 242 flow [2022-11-20 11:36:14,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:14,536 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-20 11:36:14,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:36:14,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:14,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2094274313, now seen corresponding path program 1 times [2022-11-20 11:36:14,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:14,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651725857] [2022-11-20 11:36:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:14,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:36:14,778 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:36:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:36:14,806 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:36:14,806 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:36:14,807 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:36:14,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:36:14,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:36:14,808 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 11:36:14,808 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:36:14,809 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 11:36:14,842 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:36:14,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 184 transitions, 398 flow [2022-11-20 11:36:14,918 INFO L130 PetriNetUnfolder]: 62/402 cut-off events. [2022-11-20 11:36:14,918 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 11:36:14,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 402 events. 62/402 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1318 event pairs, 1 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 277. Up to 16 conditions per place. [2022-11-20 11:36:14,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 184 transitions, 398 flow [2022-11-20 11:36:14,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 184 transitions, 398 flow [2022-11-20 11:36:14,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:36:14,928 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@487f6dd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:36:14,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:36:14,939 INFO L130 PetriNetUnfolder]: 8/107 cut-off events. [2022-11-20 11:36:14,940 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:36:14,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:14,940 INFO L209 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] [2022-11-20 11:36:14,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:14,941 INFO L85 PathProgramCache]: Analyzing trace with hash -693823390, now seen corresponding path program 1 times [2022-11-20 11:36:14,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:14,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112279368] [2022-11-20 11:36:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:14,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:14,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:14,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112279368] [2022-11-20 11:36:14,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112279368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:14,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:14,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:36:14,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323340013] [2022-11-20 11:36:14,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:14,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:36:14,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:14,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:36:14,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:36:14,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 184 [2022-11-20 11:36:14,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 184 transitions, 398 flow. Second operand has 2 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:14,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:14,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 184 [2022-11-20 11:36:14,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:15,054 INFO L130 PetriNetUnfolder]: 20/356 cut-off events. [2022-11-20 11:36:15,055 INFO L131 PetriNetUnfolder]: For 53/65 co-relation queries the response was YES. [2022-11-20 11:36:15,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 356 events. 20/356 cut-off events. For 53/65 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1205 event pairs, 1 based on Foata normal form. 106/434 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2022-11-20 11:36:15,057 INFO L137 encePairwiseOnDemand]: 161/184 looper letters, 3 selfloop transitions, 0 changer transitions 26/160 dead transitions. [2022-11-20 11:36:15,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 160 transitions, 362 flow [2022-11-20 11:36:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:36:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:36:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 337 transitions. [2022-11-20 11:36:15,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9157608695652174 [2022-11-20 11:36:15,059 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 337 transitions. [2022-11-20 11:36:15,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 337 transitions. [2022-11-20 11:36:15,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:15,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 337 transitions. [2022-11-20 11:36:15,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 168.5) internal successors, (337), 2 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,063 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,064 INFO L175 Difference]: Start difference. First operand has 162 places, 184 transitions, 398 flow. Second operand 2 states and 337 transitions. [2022-11-20 11:36:15,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 160 transitions, 362 flow [2022-11-20 11:36:15,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 160 transitions, 362 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:36:15,068 INFO L231 Difference]: Finished difference. Result has 162 places, 134 transitions, 289 flow [2022-11-20 11:36:15,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=289, PETRI_PLACES=162, PETRI_TRANSITIONS=134} [2022-11-20 11:36:15,069 INFO L288 CegarLoopForPetriNet]: 162 programPoint places, 0 predicate places. [2022-11-20 11:36:15,069 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 134 transitions, 289 flow [2022-11-20 11:36:15,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:15,070 INFO L209 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] [2022-11-20 11:36:15,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:36:15,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash -987226397, now seen corresponding path program 1 times [2022-11-20 11:36:15,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668307888] [2022-11-20 11:36:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:15,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:15,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668307888] [2022-11-20 11:36:15,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668307888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:15,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:15,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:15,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659909851] [2022-11-20 11:36:15,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:15,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:15,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:15,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:15,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:15,144 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 184 [2022-11-20 11:36:15,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 134 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:15,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 184 [2022-11-20 11:36:15,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:15,195 INFO L130 PetriNetUnfolder]: 3/188 cut-off events. [2022-11-20 11:36:15,196 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 11:36:15,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 188 events. 3/188 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 402 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 222. Up to 18 conditions per place. [2022-11-20 11:36:15,197 INFO L137 encePairwiseOnDemand]: 181/184 looper letters, 12 selfloop transitions, 2 changer transitions 0/138 dead transitions. [2022-11-20 11:36:15,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 138 transitions, 325 flow [2022-11-20 11:36:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:36:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2022-11-20 11:36:15,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8260869565217391 [2022-11-20 11:36:15,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2022-11-20 11:36:15,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2022-11-20 11:36:15,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:15,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2022-11-20 11:36:15,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,204 INFO L175 Difference]: Start difference. First operand has 162 places, 134 transitions, 289 flow. Second operand 3 states and 456 transitions. [2022-11-20 11:36:15,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 138 transitions, 325 flow [2022-11-20 11:36:15,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 138 transitions, 319 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-20 11:36:15,208 INFO L231 Difference]: Finished difference. Result has 144 places, 135 transitions, 295 flow [2022-11-20 11:36:15,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=295, PETRI_PLACES=144, PETRI_TRANSITIONS=135} [2022-11-20 11:36:15,209 INFO L288 CegarLoopForPetriNet]: 162 programPoint places, -18 predicate places. [2022-11-20 11:36:15,209 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 135 transitions, 295 flow [2022-11-20 11:36:15,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:15,210 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:15,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:36:15,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:15,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:15,211 INFO L85 PathProgramCache]: Analyzing trace with hash 326418782, now seen corresponding path program 1 times [2022-11-20 11:36:15,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:15,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100386616] [2022-11-20 11:36:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:15,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:15,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100386616] [2022-11-20 11:36:15,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100386616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:15,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578109441] [2022-11-20 11:36:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:15,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:15,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:15,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:15,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:36:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:36:15,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:36:15,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:36:15,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578109441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:15,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:36:15,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:36:15,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477674157] [2022-11-20 11:36:15,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:15,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:36:15,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 184 [2022-11-20 11:36:15,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 135 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:15,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 184 [2022-11-20 11:36:15,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:15,489 INFO L130 PetriNetUnfolder]: 0/191 cut-off events. [2022-11-20 11:36:15,489 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 11:36:15,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 191 events. 0/191 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 435 event pairs, 0 based on Foata normal form. 3/191 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-20 11:36:15,490 INFO L137 encePairwiseOnDemand]: 182/184 looper letters, 7 selfloop transitions, 0 changer transitions 1/135 dead transitions. [2022-11-20 11:36:15,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 135 transitions, 311 flow [2022-11-20 11:36:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:36:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2022-11-20 11:36:15,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8097826086956522 [2022-11-20 11:36:15,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2022-11-20 11:36:15,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2022-11-20 11:36:15,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:15,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2022-11-20 11:36:15,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,500 INFO L175 Difference]: Start difference. First operand has 144 places, 135 transitions, 295 flow. Second operand 3 states and 447 transitions. [2022-11-20 11:36:15,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 135 transitions, 311 flow [2022-11-20 11:36:15,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 135 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:36:15,505 INFO L231 Difference]: Finished difference. Result has 146 places, 134 transitions, 293 flow [2022-11-20 11:36:15,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=146, PETRI_TRANSITIONS=134} [2022-11-20 11:36:15,508 INFO L288 CegarLoopForPetriNet]: 162 programPoint places, -16 predicate places. [2022-11-20 11:36:15,508 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 134 transitions, 293 flow [2022-11-20 11:36:15,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:15,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:15,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:15,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:15,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:36:15,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash 209190633, now seen corresponding path program 1 times [2022-11-20 11:36:15,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:15,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540035634] [2022-11-20 11:36:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:15,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:15,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:15,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540035634] [2022-11-20 11:36:15,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540035634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:15,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876058000] [2022-11-20 11:36:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:15,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:15,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:15,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:15,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:36:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:15,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:36:15,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:16,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:36:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:16,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876058000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:36:16,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:36:16,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:36:16,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924765893] [2022-11-20 11:36:16,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:36:16,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:36:16,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:16,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:36:16,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:36:16,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 184 [2022-11-20 11:36:16,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 134 transitions, 293 flow. Second operand has 10 states, 10 states have (on average 148.3) internal successors, (1483), 10 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:16,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 184 [2022-11-20 11:36:16,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:16,187 INFO L130 PetriNetUnfolder]: 0/155 cut-off events. [2022-11-20 11:36:16,187 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:36:16,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 155 events. 0/155 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 211 event pairs, 0 based on Foata normal form. 2/157 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-20 11:36:16,188 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 13 selfloop transitions, 9 changer transitions 0/144 dead transitions. [2022-11-20 11:36:16,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 144 transitions, 359 flow [2022-11-20 11:36:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:36:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:36:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1338 transitions. [2022-11-20 11:36:16,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8079710144927537 [2022-11-20 11:36:16,192 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1338 transitions. [2022-11-20 11:36:16,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1338 transitions. [2022-11-20 11:36:16,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:16,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1338 transitions. [2022-11-20 11:36:16,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 148.66666666666666) internal successors, (1338), 9 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 184.0) internal successors, (1840), 10 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,201 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 184.0) internal successors, (1840), 10 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,201 INFO L175 Difference]: Start difference. First operand has 146 places, 134 transitions, 293 flow. Second operand 9 states and 1338 transitions. [2022-11-20 11:36:16,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 144 transitions, 359 flow [2022-11-20 11:36:16,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 144 transitions, 357 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-20 11:36:16,205 INFO L231 Difference]: Finished difference. Result has 155 places, 140 transitions, 341 flow [2022-11-20 11:36:16,206 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=341, PETRI_PLACES=155, PETRI_TRANSITIONS=140} [2022-11-20 11:36:16,206 INFO L288 CegarLoopForPetriNet]: 162 programPoint places, -7 predicate places. [2022-11-20 11:36:16,207 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 140 transitions, 341 flow [2022-11-20 11:36:16,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.3) internal successors, (1483), 10 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:16,208 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-11-20 11:36:16,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:16,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:36:16,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:16,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1467168614, now seen corresponding path program 1 times [2022-11-20 11:36:16,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:16,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106355884] [2022-11-20 11:36:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:16,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:36:16,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:36:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:36:16,489 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:36:16,489 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:36:16,490 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:36:16,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:36:16,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:36:16,491 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 11:36:16,492 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:36:16,492 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 11:36:16,540 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 11:36:16,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 214 transitions, 472 flow [2022-11-20 11:36:16,658 INFO L130 PetriNetUnfolder]: 96/603 cut-off events. [2022-11-20 11:36:16,658 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-20 11:36:16,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 603 events. 96/603 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2262 event pairs, 6 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 422. Up to 32 conditions per place. [2022-11-20 11:36:16,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 214 transitions, 472 flow [2022-11-20 11:36:16,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 214 transitions, 472 flow [2022-11-20 11:36:16,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:36:16,679 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@487f6dd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:36:16,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:36:16,690 INFO L130 PetriNetUnfolder]: 8/107 cut-off events. [2022-11-20 11:36:16,690 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:36:16,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:16,691 INFO L209 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] [2022-11-20 11:36:16,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:16,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1830723614, now seen corresponding path program 1 times [2022-11-20 11:36:16,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:16,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029268303] [2022-11-20 11:36:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:16,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:16,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:16,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029268303] [2022-11-20 11:36:16,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029268303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:16,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:16,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:36:16,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274425043] [2022-11-20 11:36:16,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:16,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:36:16,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:36:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:36:16,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 214 [2022-11-20 11:36:16,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 214 transitions, 472 flow. Second operand has 2 states, 2 states have (on average 176.5) internal successors, (353), 2 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:16,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 214 [2022-11-20 11:36:16,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:16,874 INFO L130 PetriNetUnfolder]: 36/538 cut-off events. [2022-11-20 11:36:16,875 INFO L131 PetriNetUnfolder]: For 123/135 co-relation queries the response was YES. [2022-11-20 11:36:16,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 538 events. 36/538 cut-off events. For 123/135 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2145 event pairs, 6 based on Foata normal form. 252/749 useless extension candidates. Maximal degree in co-relation 391. Up to 37 conditions per place. [2022-11-20 11:36:16,879 INFO L137 encePairwiseOnDemand]: 185/214 looper letters, 4 selfloop transitions, 0 changer transitions 27/184 dead transitions. [2022-11-20 11:36:16,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 184 transitions, 428 flow [2022-11-20 11:36:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:36:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:36:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 389 transitions. [2022-11-20 11:36:16,881 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9088785046728972 [2022-11-20 11:36:16,881 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 389 transitions. [2022-11-20 11:36:16,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 389 transitions. [2022-11-20 11:36:16,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:16,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 389 transitions. [2022-11-20 11:36:16,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 194.5) internal successors, (389), 2 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,885 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,886 INFO L175 Difference]: Start difference. First operand has 187 places, 214 transitions, 472 flow. Second operand 2 states and 389 transitions. [2022-11-20 11:36:16,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 184 transitions, 428 flow [2022-11-20 11:36:16,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 184 transitions, 428 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:36:16,893 INFO L231 Difference]: Finished difference. Result has 187 places, 157 transitions, 346 flow [2022-11-20 11:36:16,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=346, PETRI_PLACES=187, PETRI_TRANSITIONS=157} [2022-11-20 11:36:16,895 INFO L288 CegarLoopForPetriNet]: 187 programPoint places, 0 predicate places. [2022-11-20 11:36:16,895 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 157 transitions, 346 flow [2022-11-20 11:36:16,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 176.5) internal successors, (353), 2 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:16,896 INFO L209 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] [2022-11-20 11:36:16,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:36:16,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2124126621, now seen corresponding path program 1 times [2022-11-20 11:36:16,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:16,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415926512] [2022-11-20 11:36:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:16,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:16,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:16,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415926512] [2022-11-20 11:36:16,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415926512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:16,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:16,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:16,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456512138] [2022-11-20 11:36:16,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:16,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:16,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:16,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:16,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 214 [2022-11-20 11:36:16,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 157 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:16,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:16,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 214 [2022-11-20 11:36:16,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:17,039 INFO L130 PetriNetUnfolder]: 4/236 cut-off events. [2022-11-20 11:36:17,039 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 11:36:17,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 236 events. 4/236 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 573 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 282. Up to 24 conditions per place. [2022-11-20 11:36:17,041 INFO L137 encePairwiseOnDemand]: 211/214 looper letters, 13 selfloop transitions, 2 changer transitions 0/161 dead transitions. [2022-11-20 11:36:17,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 161 transitions, 384 flow [2022-11-20 11:36:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:36:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2022-11-20 11:36:17,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8146417445482866 [2022-11-20 11:36:17,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2022-11-20 11:36:17,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2022-11-20 11:36:17,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:17,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2022-11-20 11:36:17,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,049 INFO L175 Difference]: Start difference. First operand has 187 places, 157 transitions, 346 flow. Second operand 3 states and 523 transitions. [2022-11-20 11:36:17,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 161 transitions, 384 flow [2022-11-20 11:36:17,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 161 transitions, 372 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-20 11:36:17,053 INFO L231 Difference]: Finished difference. Result has 169 places, 158 transitions, 346 flow [2022-11-20 11:36:17,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=169, PETRI_TRANSITIONS=158} [2022-11-20 11:36:17,055 INFO L288 CegarLoopForPetriNet]: 187 programPoint places, -18 predicate places. [2022-11-20 11:36:17,055 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 158 transitions, 346 flow [2022-11-20 11:36:17,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:17,056 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:17,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:36:17,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:17,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1042022470, now seen corresponding path program 1 times [2022-11-20 11:36:17,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:17,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659482894] [2022-11-20 11:36:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:17,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:17,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:17,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659482894] [2022-11-20 11:36:17,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659482894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:17,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525943175] [2022-11-20 11:36:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:17,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:17,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:17,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:17,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:36:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:17,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:36:17,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:36:17,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:36:17,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525943175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:17,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:36:17,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:36:17,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654320986] [2022-11-20 11:36:17,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:17,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:17,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:36:17,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 214 [2022-11-20 11:36:17,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 158 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:17,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 214 [2022-11-20 11:36:17,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:17,352 INFO L130 PetriNetUnfolder]: 0/240 cut-off events. [2022-11-20 11:36:17,353 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-20 11:36:17,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 240 events. 0/240 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 621 event pairs, 0 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 11:36:17,354 INFO L137 encePairwiseOnDemand]: 212/214 looper letters, 8 selfloop transitions, 0 changer transitions 1/158 dead transitions. [2022-11-20 11:36:17,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 158 transitions, 364 flow [2022-11-20 11:36:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:36:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2022-11-20 11:36:17,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8006230529595015 [2022-11-20 11:36:17,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2022-11-20 11:36:17,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2022-11-20 11:36:17,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:17,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2022-11-20 11:36:17,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,361 INFO L175 Difference]: Start difference. First operand has 169 places, 158 transitions, 346 flow. Second operand 3 states and 514 transitions. [2022-11-20 11:36:17,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 158 transitions, 364 flow [2022-11-20 11:36:17,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 158 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:36:17,365 INFO L231 Difference]: Finished difference. Result has 171 places, 157 transitions, 344 flow [2022-11-20 11:36:17,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=171, PETRI_TRANSITIONS=157} [2022-11-20 11:36:17,366 INFO L288 CegarLoopForPetriNet]: 187 programPoint places, -16 predicate places. [2022-11-20 11:36:17,366 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 157 transitions, 344 flow [2022-11-20 11:36:17,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:17,367 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:17,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:17,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:17,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:17,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:17,579 INFO L85 PathProgramCache]: Analyzing trace with hash -602853115, now seen corresponding path program 1 times [2022-11-20 11:36:17,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:17,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414126133] [2022-11-20 11:36:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:17,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:17,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:17,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414126133] [2022-11-20 11:36:17,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414126133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:17,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153101723] [2022-11-20 11:36:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:17,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:17,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:17,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:17,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:36:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:36:17,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:17,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:36:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:17,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153101723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:36:17,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:36:17,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:36:17,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801429924] [2022-11-20 11:36:17,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:36:17,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:36:17,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:17,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:36:17,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:36:17,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 214 [2022-11-20 11:36:17,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 157 transitions, 344 flow. Second operand has 10 states, 10 states have (on average 170.3) internal successors, (1703), 10 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:17,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:17,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 214 [2022-11-20 11:36:17,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:18,099 INFO L130 PetriNetUnfolder]: 0/202 cut-off events. [2022-11-20 11:36:18,099 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 11:36:18,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 202 events. 0/202 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 379 event pairs, 0 based on Foata normal form. 2/204 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-20 11:36:18,100 INFO L137 encePairwiseOnDemand]: 208/214 looper letters, 14 selfloop transitions, 9 changer transitions 0/167 dead transitions. [2022-11-20 11:36:18,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 167 transitions, 412 flow [2022-11-20 11:36:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:36:18,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:36:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1537 transitions. [2022-11-20 11:36:18,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7980269989615784 [2022-11-20 11:36:18,105 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1537 transitions. [2022-11-20 11:36:18,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1537 transitions. [2022-11-20 11:36:18,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:18,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1537 transitions. [2022-11-20 11:36:18,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.77777777777777) internal successors, (1537), 9 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:18,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:18,120 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:18,120 INFO L175 Difference]: Start difference. First operand has 171 places, 157 transitions, 344 flow. Second operand 9 states and 1537 transitions. [2022-11-20 11:36:18,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 167 transitions, 412 flow [2022-11-20 11:36:18,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 167 transitions, 410 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-20 11:36:18,124 INFO L231 Difference]: Finished difference. Result has 180 places, 163 transitions, 392 flow [2022-11-20 11:36:18,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=392, PETRI_PLACES=180, PETRI_TRANSITIONS=163} [2022-11-20 11:36:18,126 INFO L288 CegarLoopForPetriNet]: 187 programPoint places, -7 predicate places. [2022-11-20 11:36:18,127 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 163 transitions, 392 flow [2022-11-20 11:36:18,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 170.3) internal successors, (1703), 10 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:18,128 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:18,129 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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] [2022-11-20 11:36:18,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:18,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:36:18,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:18,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:18,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1303547036, now seen corresponding path program 1 times [2022-11-20 11:36:18,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:18,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078295038] [2022-11-20 11:36:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:18,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:36:18,359 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:36:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:36:18,384 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:36:18,384 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:36:18,384 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:36:18,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:36:18,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:36:18,385 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 11:36:18,386 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:36:18,386 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 11:36:18,418 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-20 11:36:18,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 244 transitions, 548 flow [2022-11-20 11:36:18,604 INFO L130 PetriNetUnfolder]: 158/944 cut-off events. [2022-11-20 11:36:18,605 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-20 11:36:18,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 944 events. 158/944 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4154 event pairs, 23 based on Foata normal form. 0/796 useless extension candidates. Maximal degree in co-relation 648. Up to 80 conditions per place. [2022-11-20 11:36:18,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 244 transitions, 548 flow [2022-11-20 11:36:18,626 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 244 transitions, 548 flow [2022-11-20 11:36:18,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:36:18,627 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@487f6dd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:36:18,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:36:18,637 INFO L130 PetriNetUnfolder]: 8/104 cut-off events. [2022-11-20 11:36:18,637 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:36:18,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:18,638 INFO L209 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] [2022-11-20 11:36:18,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:18,639 INFO L85 PathProgramCache]: Analyzing trace with hash -598189854, now seen corresponding path program 1 times [2022-11-20 11:36:18,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:18,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552510322] [2022-11-20 11:36:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:18,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:18,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552510322] [2022-11-20 11:36:18,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552510322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:18,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:18,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:36:18,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587994677] [2022-11-20 11:36:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:18,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:36:18,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:36:18,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:36:18,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 244 [2022-11-20 11:36:18,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 244 transitions, 548 flow. Second operand has 2 states, 2 states have (on average 198.5) internal successors, (397), 2 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:18,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:18,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 244 [2022-11-20 11:36:18,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:18,934 INFO L130 PetriNetUnfolder]: 72/852 cut-off events. [2022-11-20 11:36:18,934 INFO L131 PetriNetUnfolder]: For 290/314 co-relation queries the response was YES. [2022-11-20 11:36:18,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 852 events. 72/852 cut-off events. For 290/314 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4043 event pairs, 23 based on Foata normal form. 580/1370 useless extension candidates. Maximal degree in co-relation 619. Up to 86 conditions per place. [2022-11-20 11:36:18,941 INFO L137 encePairwiseOnDemand]: 209/244 looper letters, 5 selfloop transitions, 0 changer transitions 28/208 dead transitions. [2022-11-20 11:36:18,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 208 transitions, 496 flow [2022-11-20 11:36:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:36:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:36:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 441 transitions. [2022-11-20 11:36:18,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9036885245901639 [2022-11-20 11:36:18,944 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 441 transitions. [2022-11-20 11:36:18,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 441 transitions. [2022-11-20 11:36:18,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:18,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 441 transitions. [2022-11-20 11:36:18,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 220.5) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:18,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:18,947 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:18,948 INFO L175 Difference]: Start difference. First operand has 212 places, 244 transitions, 548 flow. Second operand 2 states and 441 transitions. [2022-11-20 11:36:18,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 208 transitions, 496 flow [2022-11-20 11:36:18,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 208 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:36:18,953 INFO L231 Difference]: Finished difference. Result has 212 places, 180 transitions, 405 flow [2022-11-20 11:36:18,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=405, PETRI_PLACES=212, PETRI_TRANSITIONS=180} [2022-11-20 11:36:18,954 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, 0 predicate places. [2022-11-20 11:36:18,954 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 180 transitions, 405 flow [2022-11-20 11:36:18,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 198.5) internal successors, (397), 2 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:18,955 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:18,955 INFO L209 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] [2022-11-20 11:36:18,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:36:18,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:18,956 INFO L85 PathProgramCache]: Analyzing trace with hash -891592861, now seen corresponding path program 1 times [2022-11-20 11:36:18,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:18,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632361151] [2022-11-20 11:36:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:18,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:18,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:18,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632361151] [2022-11-20 11:36:18,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632361151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:18,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:18,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:36:18,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532619220] [2022-11-20 11:36:18,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:18,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:18,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:19,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:19,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:36:19,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 244 [2022-11-20 11:36:19,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 180 transitions, 405 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:19,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 244 [2022-11-20 11:36:19,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:19,081 INFO L130 PetriNetUnfolder]: 5/284 cut-off events. [2022-11-20 11:36:19,081 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 11:36:19,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 284 events. 5/284 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 742 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 343. Up to 30 conditions per place. [2022-11-20 11:36:19,084 INFO L137 encePairwiseOnDemand]: 241/244 looper letters, 14 selfloop transitions, 2 changer transitions 0/184 dead transitions. [2022-11-20 11:36:19,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 184 transitions, 445 flow [2022-11-20 11:36:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:36:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2022-11-20 11:36:19,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8060109289617486 [2022-11-20 11:36:19,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2022-11-20 11:36:19,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2022-11-20 11:36:19,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:19,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2022-11-20 11:36:19,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,092 INFO L175 Difference]: Start difference. First operand has 212 places, 180 transitions, 405 flow. Second operand 3 states and 590 transitions. [2022-11-20 11:36:19,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 184 transitions, 445 flow [2022-11-20 11:36:19,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 184 transitions, 425 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-20 11:36:19,096 INFO L231 Difference]: Finished difference. Result has 194 places, 181 transitions, 397 flow [2022-11-20 11:36:19,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=397, PETRI_PLACES=194, PETRI_TRANSITIONS=181} [2022-11-20 11:36:19,098 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, -18 predicate places. [2022-11-20 11:36:19,098 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 181 transitions, 397 flow [2022-11-20 11:36:19,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:19,099 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:19,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 11:36:19,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:19,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1675805270, now seen corresponding path program 1 times [2022-11-20 11:36:19,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:19,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265026107] [2022-11-20 11:36:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:19,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:19,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:19,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265026107] [2022-11-20 11:36:19,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265026107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:19,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126484889] [2022-11-20 11:36:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:19,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:19,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:19,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:19,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:36:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:19,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:36:19,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:36:19,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:36:19,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126484889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:19,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:36:19,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:36:19,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348213009] [2022-11-20 11:36:19,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:19,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:36:19,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:19,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:36:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:36:19,319 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 244 [2022-11-20 11:36:19,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 181 transitions, 397 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:19,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 244 [2022-11-20 11:36:19,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:19,390 INFO L130 PetriNetUnfolder]: 0/289 cut-off events. [2022-11-20 11:36:19,390 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-20 11:36:19,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 289 events. 0/289 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 807 event pairs, 0 based on Foata normal form. 5/289 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-20 11:36:19,392 INFO L137 encePairwiseOnDemand]: 242/244 looper letters, 9 selfloop transitions, 0 changer transitions 1/181 dead transitions. [2022-11-20 11:36:19,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 181 transitions, 417 flow [2022-11-20 11:36:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:36:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:36:19,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-11-20 11:36:19,394 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7937158469945356 [2022-11-20 11:36:19,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-11-20 11:36:19,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-11-20 11:36:19,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:19,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-11-20 11:36:19,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,416 INFO L175 Difference]: Start difference. First operand has 194 places, 181 transitions, 397 flow. Second operand 3 states and 581 transitions. [2022-11-20 11:36:19,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 181 transitions, 417 flow [2022-11-20 11:36:19,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 181 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:36:19,420 INFO L231 Difference]: Finished difference. Result has 196 places, 180 transitions, 395 flow [2022-11-20 11:36:19,420 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=395, PETRI_PLACES=196, PETRI_TRANSITIONS=180} [2022-11-20 11:36:19,421 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, -16 predicate places. [2022-11-20 11:36:19,421 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 180 transitions, 395 flow [2022-11-20 11:36:19,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:19,422 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:19,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:19,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:19,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash -110503135, now seen corresponding path program 1 times [2022-11-20 11:36:19,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:19,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489632697] [2022-11-20 11:36:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:19,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:19,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489632697] [2022-11-20 11:36:19,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489632697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:19,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261749080] [2022-11-20 11:36:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:19,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:19,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:19,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:19,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:36:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:19,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:36:19,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:19,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:36:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:19,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261749080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:36:19,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:36:19,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:36:19,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655379497] [2022-11-20 11:36:19,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:36:19,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:36:19,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:19,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:36:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:36:19,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 244 [2022-11-20 11:36:19,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 180 transitions, 395 flow. Second operand has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:19,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:19,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 244 [2022-11-20 11:36:19,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:20,098 INFO L130 PetriNetUnfolder]: 0/249 cut-off events. [2022-11-20 11:36:20,098 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 11:36:20,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 249 events. 0/249 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 546 event pairs, 0 based on Foata normal form. 2/251 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 11:36:20,099 INFO L137 encePairwiseOnDemand]: 238/244 looper letters, 15 selfloop transitions, 9 changer transitions 0/190 dead transitions. [2022-11-20 11:36:20,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 190 transitions, 465 flow [2022-11-20 11:36:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:36:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:36:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1736 transitions. [2022-11-20 11:36:20,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7905282331511839 [2022-11-20 11:36:20,105 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1736 transitions. [2022-11-20 11:36:20,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1736 transitions. [2022-11-20 11:36:20,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:20,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1736 transitions. [2022-11-20 11:36:20,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.88888888888889) internal successors, (1736), 9 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:20,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 244.0) internal successors, (2440), 10 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:20,117 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 244.0) internal successors, (2440), 10 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:20,117 INFO L175 Difference]: Start difference. First operand has 196 places, 180 transitions, 395 flow. Second operand 9 states and 1736 transitions. [2022-11-20 11:36:20,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 190 transitions, 465 flow [2022-11-20 11:36:20,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 190 transitions, 463 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-20 11:36:20,122 INFO L231 Difference]: Finished difference. Result has 205 places, 186 transitions, 443 flow [2022-11-20 11:36:20,122 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=443, PETRI_PLACES=205, PETRI_TRANSITIONS=186} [2022-11-20 11:36:20,123 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, -7 predicate places. [2022-11-20 11:36:20,123 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 186 transitions, 443 flow [2022-11-20 11:36:20,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:20,124 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:20,124 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:36:20,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:20,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52523146-ea11-449f-b135-fe6974e569c7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:36:20,331 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:20,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1886287754, now seen corresponding path program 1 times [2022-11-20 11:36:20,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:20,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387409000] [2022-11-20 11:36:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:20,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 11:36:20,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:20,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387409000] [2022-11-20 11:36:20,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387409000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:36:20,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:36:20,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:36:20,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660418553] [2022-11-20 11:36:20,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:36:20,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:36:20,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:20,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:36:20,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:36:20,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 244 [2022-11-20 11:36:20,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 186 transitions, 443 flow. Second operand has 5 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:36:20,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:20,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 244 [2022-11-20 11:36:20,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:02,378 INFO L130 PetriNetUnfolder]: 110509/240138 cut-off events. [2022-11-20 11:37:02,378 INFO L131 PetriNetUnfolder]: For 2554/2554 co-relation queries the response was YES. [2022-11-20 11:37:03,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384397 conditions, 240138 events. 110509/240138 cut-off events. For 2554/2554 co-relation queries the response was YES. Maximal size of possible extension queue 8656. Compared 3229197 event pairs, 76730 based on Foata normal form. 3875/241133 useless extension candidates. Maximal degree in co-relation 384384. Up to 88950 conditions per place. [2022-11-20 11:37:04,865 INFO L137 encePairwiseOnDemand]: 235/244 looper letters, 38 selfloop transitions, 6 changer transitions 65/265 dead transitions. [2022-11-20 11:37:04,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 265 transitions, 839 flow [2022-11-20 11:37:04,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:37:04,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:37:04,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1315 transitions. [2022-11-20 11:37:04,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7699063231850117 [2022-11-20 11:37:04,872 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1315 transitions. [2022-11-20 11:37:04,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1315 transitions. [2022-11-20 11:37:04,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:04,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1315 transitions. [2022-11-20 11:37:05,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.85714285714286) internal successors, (1315), 7 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:05,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 244.0) internal successors, (1952), 8 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:05,183 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 244.0) internal successors, (1952), 8 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:05,183 INFO L175 Difference]: Start difference. First operand has 205 places, 186 transitions, 443 flow. Second operand 7 states and 1315 transitions. [2022-11-20 11:37:05,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 265 transitions, 839 flow [2022-11-20 11:37:05,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 265 transitions, 833 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:05,210 INFO L231 Difference]: Finished difference. Result has 215 places, 191 transitions, 505 flow [2022-11-20 11:37:05,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=505, PETRI_PLACES=215, PETRI_TRANSITIONS=191} [2022-11-20 11:37:05,211 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, 3 predicate places. [2022-11-20 11:37:05,211 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 191 transitions, 505 flow [2022-11-20 11:37:05,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:05,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:05,213 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:05,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 11:37:05,214 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1486007052, now seen corresponding path program 1 times [2022-11-20 11:37:05,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:05,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908975154] [2022-11-20 11:37:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:05,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:37:05,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:05,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908975154] [2022-11-20 11:37:05,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908975154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:05,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:05,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:37:05,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034718619] [2022-11-20 11:37:05,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:05,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:37:05,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:05,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:37:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:37:05,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 244 [2022-11-20 11:37:05,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 191 transitions, 505 flow. Second operand has 6 states, 6 states have (on average 155.16666666666666) internal successors, (931), 6 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:05,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:05,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 244 [2022-11-20 11:37:05,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand