./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/fkp2014.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-lit/fkp2014.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc --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 f24d9db33c7d5aecb89ac12017849974773f5d17a3292112bf25190c4dfae9f0 --- 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-5e519f3 [2022-11-02 21:07:14,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:07:14,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:07:14,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:07:14,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:07:14,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:07:14,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:07:14,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:07:14,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:07:14,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:07:14,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:07:14,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:07:14,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:07:14,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:07:14,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:07:14,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:07:14,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:07:14,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:07:14,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:07:14,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:07:14,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:07:14,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:07:14,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:07:14,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:07:14,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:07:14,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:07:14,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:07:14,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:07:14,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:07:14,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:07:14,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:07:14,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:07:14,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:07:14,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:07:14,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:07:14,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:07:14,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:07:14,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:07:14,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:07:14,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:07:14,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:07:14,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:07:14,803 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:07:14,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:07:14,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:07:14,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:07:14,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:07:14,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:07:14,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:07:14,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:07:14,807 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:07:14,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:07:14,808 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:07:14,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:07:14,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:07:14,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:07:14,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:07:14,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:07:14,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:07:14,810 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:07:14,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:07:14,811 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:07:14,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:07:14,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:07:14,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:07:14,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:07:14,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:07:14,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:07:14,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:07:14,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:07:14,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:07:14,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:07:14,813 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:07:14,814 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:07:14,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:07:14,814 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_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f24d9db33c7d5aecb89ac12017849974773f5d17a3292112bf25190c4dfae9f0 [2022-11-02 21:07:15,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:07:15,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:07:15,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:07:15,134 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:07:15,134 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:07:15,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread-lit/fkp2014.i [2022-11-02 21:07:15,201 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/data/af8d7f2c3/f47d9d6d6dc4440e827b4c882431bbbb/FLAG099fcb156 [2022-11-02 21:07:15,743 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:07:15,743 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/sv-benchmarks/c/pthread-lit/fkp2014.i [2022-11-02 21:07:15,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/data/af8d7f2c3/f47d9d6d6dc4440e827b4c882431bbbb/FLAG099fcb156 [2022-11-02 21:07:16,008 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/data/af8d7f2c3/f47d9d6d6dc4440e827b4c882431bbbb [2022-11-02 21:07:16,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:07:16,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:07:16,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:07:16,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:07:16,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:07:16,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7edbb874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16, skipping insertion in model container [2022-11-02 21:07:16,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:07:16,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:07:16,481 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/sv-benchmarks/c/pthread-lit/fkp2014.i[30003,30016] [2022-11-02 21:07:16,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:07:16,514 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:07:16,567 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/sv-benchmarks/c/pthread-lit/fkp2014.i[30003,30016] [2022-11-02 21:07:16,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:07:16,617 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:07:16,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16 WrapperNode [2022-11-02 21:07:16,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:07:16,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:07:16,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:07:16,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:07:16,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,688 INFO L138 Inliner]: procedures = 173, calls = 19, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 64 [2022-11-02 21:07:16,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:07:16,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:07:16,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:07:16,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:07:16,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,721 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:07:16,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:07:16,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:07:16,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:07:16,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (1/1) ... [2022-11-02 21:07:16,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:07:16,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:16,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:07:16,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baac543f-ce24-4f2e-be98-fb8e27967ed0/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:07:16,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:07:16,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 21:07:16,819 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-11-02 21:07:16,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-11-02 21:07:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:07:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:07:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:07:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:07:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 21:07:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:07:16,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:07:16,823 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 21:07:16,949 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:07:16,951 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:07:17,161 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:07:17,189 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:07:17,190 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:07:17,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:07:17 BoogieIcfgContainer [2022-11-02 21:07:17,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:07:17,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:07:17,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:07:17,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:07:17,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:07:16" (1/3) ... [2022-11-02 21:07:17,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470dd87d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:07:17, skipping insertion in model container [2022-11-02 21:07:17,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:16" (2/3) ... [2022-11-02 21:07:17,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470dd87d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:07:17, skipping insertion in model container [2022-11-02 21:07:17,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:07:17" (3/3) ... [2022-11-02 21:07:17,202 INFO L112 eAbstractionObserver]: Analyzing ICFG fkp2014.i [2022-11-02 21:07:17,211 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 21:07:17,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:07:17,251 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:07:17,251 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 21:07:17,337 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 21:07:17,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 70 transitions, 145 flow [2022-11-02 21:07:17,473 INFO L130 PetriNetUnfolder]: 4/82 cut-off events. [2022-11-02 21:07:17,474 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 21:07:17,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 4/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2022-11-02 21:07:17,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 70 transitions, 145 flow [2022-11-02 21:07:17,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 70 transitions, 145 flow [2022-11-02 21:07:17,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:07:17,499 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;@3cc7e842, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:07:17,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 21:07:17,520 INFO L130 PetriNetUnfolder]: 3/67 cut-off events. [2022-11-02 21:07:17,521 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 21:07:17,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:17,522 INFO L208 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] [2022-11-02 21:07:17,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:17,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1443592451, now seen corresponding path program 1 times [2022-11-02 21:07:17,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:17,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427848835] [2022-11-02 21:07:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:17,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:07:17,678 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 21:07:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:07:17,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 21:07:17,759 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 21:07:17,762 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-02 21:07:17,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-02 21:07:17,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-02 21:07:17,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:07:17,766 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 21:07:17,770 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 21:07:17,770 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 21:07:17,820 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 21:07:17,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 196 flow [2022-11-02 21:07:17,904 INFO L130 PetriNetUnfolder]: 6/121 cut-off events. [2022-11-02 21:07:17,906 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 21:07:17,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 121 events. 6/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 181 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2022-11-02 21:07:17,910 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 92 transitions, 196 flow [2022-11-02 21:07:17,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 196 flow [2022-11-02 21:07:17,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:07:17,921 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;@3cc7e842, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:07:17,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 21:07:17,944 INFO L130 PetriNetUnfolder]: 3/71 cut-off events. [2022-11-02 21:07:17,944 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 21:07:17,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:17,945 INFO L208 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] [2022-11-02 21:07:17,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 21:07:17,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1750266967, now seen corresponding path program 1 times [2022-11-02 21:07:17,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:17,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782194457] [2022-11-02 21:07:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:17,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:18,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:18,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782194457] [2022-11-02 21:07:18,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782194457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:18,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:18,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:07:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680373785] [2022-11-02 21:07:18,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:18,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:07:18,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:07:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:07:18,532 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 92 [2022-11-02 21:07:18,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 92 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 72.28571428571429) internal successors, (506), 7 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:18,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:18,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 92 [2022-11-02 21:07:18,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:18,826 INFO L130 PetriNetUnfolder]: 23/219 cut-off events. [2022-11-02 21:07:18,826 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-02 21:07:18,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 219 events. 23/219 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 802 event pairs, 0 based on Foata normal form. 50/259 useless extension candidates. Maximal degree in co-relation 190. Up to 14 conditions per place. [2022-11-02 21:07:18,832 INFO L137 encePairwiseOnDemand]: 78/92 looper letters, 28 selfloop transitions, 12 changer transitions 1/111 dead transitions. [2022-11-02 21:07:18,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 111 transitions, 334 flow [2022-11-02 21:07:18,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:07:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 21:07:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 766 transitions. [2022-11-02 21:07:18,859 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8326086956521739 [2022-11-02 21:07:18,860 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 766 transitions. [2022-11-02 21:07:18,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 766 transitions. [2022-11-02 21:07:18,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:18,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 766 transitions. [2022-11-02 21:07:18,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.6) internal successors, (766), 10 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:18,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:18,880 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:18,881 INFO L175 Difference]: Start difference. First operand has 93 places, 92 transitions, 196 flow. Second operand 10 states and 766 transitions. [2022-11-02 21:07:18,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 111 transitions, 334 flow [2022-11-02 21:07:18,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 332 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-02 21:07:18,890 INFO L231 Difference]: Finished difference. Result has 105 places, 95 transitions, 258 flow [2022-11-02 21:07:18,892 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=258, PETRI_PLACES=105, PETRI_TRANSITIONS=95} [2022-11-02 21:07:18,895 INFO L287 CegarLoopForPetriNet]: 93 programPoint places, 12 predicate places. [2022-11-02 21:07:18,895 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 95 transitions, 258 flow [2022-11-02 21:07:18,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.28571428571429) internal successors, (506), 7 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:18,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:18,897 INFO L208 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] [2022-11-02 21:07:18,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:07:18,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 21:07:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1293266799, now seen corresponding path program 1 times [2022-11-02 21:07:18,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:18,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112303491] [2022-11-02 21:07:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:07:18,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 21:07:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:07:18,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 21:07:18,943 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 21:07:18,943 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-02 21:07:18,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-02 21:07:18,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-02 21:07:18,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-02 21:07:18,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:07:18,945 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-02 21:07:18,945 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 21:07:18,946 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 21:07:18,968 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 21:07:18,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 114 transitions, 249 flow [2022-11-02 21:07:18,995 INFO L130 PetriNetUnfolder]: 8/160 cut-off events. [2022-11-02 21:07:18,996 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 21:07:18,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 160 events. 8/160 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 309 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2022-11-02 21:07:18,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 114 transitions, 249 flow [2022-11-02 21:07:18,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 114 transitions, 249 flow [2022-11-02 21:07:19,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:07:19,002 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;@3cc7e842, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:07:19,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 21:07:19,011 INFO L130 PetriNetUnfolder]: 4/72 cut-off events. [2022-11-02 21:07:19,011 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 21:07:19,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:19,011 INFO L208 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] [2022-11-02 21:07:19,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 21:07:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:19,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1279246079, now seen corresponding path program 1 times [2022-11-02 21:07:19,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:19,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828635522] [2022-11-02 21:07:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:19,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:19,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:19,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828635522] [2022-11-02 21:07:19,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828635522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:19,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:19,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:07:19,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119841911] [2022-11-02 21:07:19,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:19,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:07:19,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:19,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:07:19,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:07:19,244 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 114 [2022-11-02 21:07:19,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 114 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:19,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:19,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 114 [2022-11-02 21:07:19,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:19,687 INFO L130 PetriNetUnfolder]: 238/950 cut-off events. [2022-11-02 21:07:19,687 INFO L131 PetriNetUnfolder]: For 229/229 co-relation queries the response was YES. [2022-11-02 21:07:19,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1553 conditions, 950 events. 238/950 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6479 event pairs, 11 based on Foata normal form. 277/1187 useless extension candidates. Maximal degree in co-relation 1038. Up to 98 conditions per place. [2022-11-02 21:07:19,703 INFO L137 encePairwiseOnDemand]: 97/114 looper letters, 63 selfloop transitions, 16 changer transitions 1/166 dead transitions. [2022-11-02 21:07:19,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 166 transitions, 580 flow [2022-11-02 21:07:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:07:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 21:07:19,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 975 transitions. [2022-11-02 21:07:19,708 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8552631578947368 [2022-11-02 21:07:19,708 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 975 transitions. [2022-11-02 21:07:19,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 975 transitions. [2022-11-02 21:07:19,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:19,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 975 transitions. [2022-11-02 21:07:19,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.5) internal successors, (975), 10 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:19,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 114.0) internal successors, (1254), 11 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:19,717 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 114.0) internal successors, (1254), 11 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:19,717 INFO L175 Difference]: Start difference. First operand has 116 places, 114 transitions, 249 flow. Second operand 10 states and 975 transitions. [2022-11-02 21:07:19,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 166 transitions, 580 flow [2022-11-02 21:07:19,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 166 transitions, 560 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-02 21:07:19,725 INFO L231 Difference]: Finished difference. Result has 128 places, 119 transitions, 341 flow [2022-11-02 21:07:19,726 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=341, PETRI_PLACES=128, PETRI_TRANSITIONS=119} [2022-11-02 21:07:19,727 INFO L287 CegarLoopForPetriNet]: 116 programPoint places, 12 predicate places. [2022-11-02 21:07:19,727 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 119 transitions, 341 flow [2022-11-02 21:07:19,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:19,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:19,728 INFO L208 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] [2022-11-02 21:07:19,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:07:19,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 21:07:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash 406920230, now seen corresponding path program 1 times [2022-11-02 21:07:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:19,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936809898] [2022-11-02 21:07:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:07:19,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:19,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936809898] [2022-11-02 21:07:19,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936809898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:19,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:19,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:07:19,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134250811] [2022-11-02 21:07:19,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:19,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:07:19,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:19,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:07:19,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:07:19,955 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 114 [2022-11-02 21:07:19,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 119 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:19,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:19,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 114 [2022-11-02 21:07:19,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:20,372 INFO L130 PetriNetUnfolder]: 269/1370 cut-off events. [2022-11-02 21:07:20,373 INFO L131 PetriNetUnfolder]: For 746/785 co-relation queries the response was YES. [2022-11-02 21:07:20,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2593 conditions, 1370 events. 269/1370 cut-off events. For 746/785 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10796 event pairs, 40 based on Foata normal form. 21/1332 useless extension candidates. Maximal degree in co-relation 1988. Up to 131 conditions per place. [2022-11-02 21:07:20,392 INFO L137 encePairwiseOnDemand]: 102/114 looper letters, 61 selfloop transitions, 24 changer transitions 0/174 dead transitions. [2022-11-02 21:07:20,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 174 transitions, 766 flow [2022-11-02 21:07:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:07:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 21:07:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 949 transitions. [2022-11-02 21:07:20,396 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8324561403508772 [2022-11-02 21:07:20,396 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 949 transitions. [2022-11-02 21:07:20,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 949 transitions. [2022-11-02 21:07:20,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:20,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 949 transitions. [2022-11-02 21:07:20,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.9) internal successors, (949), 10 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:20,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 114.0) internal successors, (1254), 11 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:20,409 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 114.0) internal successors, (1254), 11 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:20,410 INFO L175 Difference]: Start difference. First operand has 128 places, 119 transitions, 341 flow. Second operand 10 states and 949 transitions. [2022-11-02 21:07:20,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 174 transitions, 766 flow [2022-11-02 21:07:20,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 174 transitions, 764 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:07:20,421 INFO L231 Difference]: Finished difference. Result has 139 places, 131 transitions, 481 flow [2022-11-02 21:07:20,421 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=481, PETRI_PLACES=139, PETRI_TRANSITIONS=131} [2022-11-02 21:07:20,423 INFO L287 CegarLoopForPetriNet]: 116 programPoint places, 23 predicate places. [2022-11-02 21:07:20,424 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 131 transitions, 481 flow [2022-11-02 21:07:20,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:20,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:20,424 INFO L208 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] [2022-11-02 21:07:20,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:07:20,425 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 21:07:20,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:20,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1816871974, now seen corresponding path program 1 times [2022-11-02 21:07:20,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:20,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918686522] [2022-11-02 21:07:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:20,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:07:20,464 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 21:07:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:07:20,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 21:07:20,484 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 21:07:20,484 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 21:07:20,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 21:07:20,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-02 21:07:20,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 21:07:20,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 21:07:20,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:07:20,486 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 21:07:20,486 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 21:07:20,487 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 21:07:20,508 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 21:07:20,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 136 transitions, 304 flow [2022-11-02 21:07:20,534 INFO L130 PetriNetUnfolder]: 10/199 cut-off events. [2022-11-02 21:07:20,535 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 21:07:20,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 199 events. 10/199 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 407 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 168. Up to 10 conditions per place. [2022-11-02 21:07:20,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 136 transitions, 304 flow [2022-11-02 21:07:20,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 136 transitions, 304 flow [2022-11-02 21:07:20,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:07:20,540 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;@3cc7e842, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:07:20,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 21:07:20,548 INFO L130 PetriNetUnfolder]: 3/73 cut-off events. [2022-11-02 21:07:20,548 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 21:07:20,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:20,549 INFO L208 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] [2022-11-02 21:07:20,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 21:07:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:20,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2006582730, now seen corresponding path program 1 times [2022-11-02 21:07:20,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:20,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160902027] [2022-11-02 21:07:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:20,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:20,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:20,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160902027] [2022-11-02 21:07:20,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160902027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:20,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:20,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:07:20,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282005181] [2022-11-02 21:07:20,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:20,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:07:20,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:07:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:07:20,681 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-11-02 21:07:20,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 136 transitions, 304 flow. Second operand has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:20,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:20,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-11-02 21:07:20,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:21,810 INFO L130 PetriNetUnfolder]: 1677/4738 cut-off events. [2022-11-02 21:07:21,810 INFO L131 PetriNetUnfolder]: For 1790/1790 co-relation queries the response was YES. [2022-11-02 21:07:21,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8234 conditions, 4738 events. 1677/4738 cut-off events. For 1790/1790 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 42576 event pairs, 135 based on Foata normal form. 1430/5996 useless extension candidates. Maximal degree in co-relation 4815. Up to 757 conditions per place. [2022-11-02 21:07:21,958 INFO L137 encePairwiseOnDemand]: 116/136 looper letters, 89 selfloop transitions, 20 changer transitions 1/212 dead transitions. [2022-11-02 21:07:21,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 212 transitions, 806 flow [2022-11-02 21:07:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:07:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 21:07:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1172 transitions. [2022-11-02 21:07:21,962 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.861764705882353 [2022-11-02 21:07:21,962 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1172 transitions. [2022-11-02 21:07:21,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1172 transitions. [2022-11-02 21:07:21,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:21,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1172 transitions. [2022-11-02 21:07:21,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.2) internal successors, (1172), 10 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:21,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:21,972 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:21,972 INFO L175 Difference]: Start difference. First operand has 139 places, 136 transitions, 304 flow. Second operand 10 states and 1172 transitions. [2022-11-02 21:07:21,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 212 transitions, 806 flow [2022-11-02 21:07:21,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 212 transitions, 752 flow, removed 27 selfloop flow, removed 0 redundant places. [2022-11-02 21:07:21,981 INFO L231 Difference]: Finished difference. Result has 150 places, 143 transitions, 417 flow [2022-11-02 21:07:21,982 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=417, PETRI_PLACES=150, PETRI_TRANSITIONS=143} [2022-11-02 21:07:21,983 INFO L287 CegarLoopForPetriNet]: 139 programPoint places, 11 predicate places. [2022-11-02 21:07:21,983 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 143 transitions, 417 flow [2022-11-02 21:07:21,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:21,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:21,985 INFO L208 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] [2022-11-02 21:07:21,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 21:07:21,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 21:07:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash -264445945, now seen corresponding path program 1 times [2022-11-02 21:07:21,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:21,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890882971] [2022-11-02 21:07:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:07:22,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:22,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890882971] [2022-11-02 21:07:22,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890882971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:22,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:22,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:07:22,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355654966] [2022-11-02 21:07:22,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:22,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:07:22,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:22,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:07:22,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:07:22,179 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-11-02 21:07:22,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 143 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 104.42857142857143) internal successors, (731), 7 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:22,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:22,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-11-02 21:07:22,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:23,984 INFO L130 PetriNetUnfolder]: 2224/7252 cut-off events. [2022-11-02 21:07:23,985 INFO L131 PetriNetUnfolder]: For 4963/5150 co-relation queries the response was YES. [2022-11-02 21:07:24,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15296 conditions, 7252 events. 2224/7252 cut-off events. For 4963/5150 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 76432 event pairs, 341 based on Foata normal form. 136/7122 useless extension candidates. Maximal degree in co-relation 15173. Up to 1084 conditions per place. [2022-11-02 21:07:24,107 INFO L137 encePairwiseOnDemand]: 122/136 looper letters, 87 selfloop transitions, 34 changer transitions 0/226 dead transitions. [2022-11-02 21:07:24,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 226 transitions, 1057 flow [2022-11-02 21:07:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:07:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 21:07:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1139 transitions. [2022-11-02 21:07:24,111 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8375 [2022-11-02 21:07:24,111 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1139 transitions. [2022-11-02 21:07:24,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1139 transitions. [2022-11-02 21:07:24,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:24,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1139 transitions. [2022-11-02 21:07:24,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.9) internal successors, (1139), 10 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:24,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:24,119 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:24,119 INFO L175 Difference]: Start difference. First operand has 150 places, 143 transitions, 417 flow. Second operand 10 states and 1139 transitions. [2022-11-02 21:07:24,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 226 transitions, 1057 flow [2022-11-02 21:07:24,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 1055 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:07:24,142 INFO L231 Difference]: Finished difference. Result has 161 places, 161 transitions, 624 flow [2022-11-02 21:07:24,143 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=624, PETRI_PLACES=161, PETRI_TRANSITIONS=161} [2022-11-02 21:07:24,145 INFO L287 CegarLoopForPetriNet]: 139 programPoint places, 22 predicate places. [2022-11-02 21:07:24,145 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 161 transitions, 624 flow [2022-11-02 21:07:24,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.42857142857143) internal successors, (731), 7 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:24,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:24,148 INFO L208 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] [2022-11-02 21:07:24,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 21:07:24,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 21:07:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:24,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1096817245, now seen corresponding path program 1 times [2022-11-02 21:07:24,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:24,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600451623] [2022-11-02 21:07:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:07:24,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:24,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600451623] [2022-11-02 21:07:24,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600451623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:24,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:24,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:07:24,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582630068] [2022-11-02 21:07:24,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:24,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:07:24,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:24,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:07:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:07:24,342 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-11-02 21:07:24,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 161 transitions, 624 flow. Second operand has 7 states, 7 states have (on average 104.57142857142857) internal successors, (732), 7 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) [2022-11-02 21:07:24,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:24,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-11-02 21:07:24,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:26,681 INFO L130 PetriNetUnfolder]: 2824/9311 cut-off events. [2022-11-02 21:07:26,682 INFO L131 PetriNetUnfolder]: For 9644/9811 co-relation queries the response was YES. [2022-11-02 21:07:26,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21367 conditions, 9311 events. 2824/9311 cut-off events. For 9644/9811 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 105597 event pairs, 503 based on Foata normal form. 112/9140 useless extension candidates. Maximal degree in co-relation 21235. Up to 1500 conditions per place. [2022-11-02 21:07:26,851 INFO L137 encePairwiseOnDemand]: 122/136 looper letters, 82 selfloop transitions, 64 changer transitions 0/254 dead transitions. [2022-11-02 21:07:26,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 254 transitions, 1485 flow [2022-11-02 21:07:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:07:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 21:07:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1134 transitions. [2022-11-02 21:07:26,855 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8338235294117647 [2022-11-02 21:07:26,855 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1134 transitions. [2022-11-02 21:07:26,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1134 transitions. [2022-11-02 21:07:26,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:26,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1134 transitions. [2022-11-02 21:07:26,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.4) internal successors, (1134), 10 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:26,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:26,863 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:26,863 INFO L175 Difference]: Start difference. First operand has 161 places, 161 transitions, 624 flow. Second operand 10 states and 1134 transitions. [2022-11-02 21:07:26,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 254 transitions, 1485 flow [2022-11-02 21:07:26,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 254 transitions, 1478 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 21:07:26,902 INFO L231 Difference]: Finished difference. Result has 172 places, 195 transitions, 1126 flow [2022-11-02 21:07:26,903 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1126, PETRI_PLACES=172, PETRI_TRANSITIONS=195} [2022-11-02 21:07:26,903 INFO L287 CegarLoopForPetriNet]: 139 programPoint places, 33 predicate places. [2022-11-02 21:07:26,903 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 195 transitions, 1126 flow [2022-11-02 21:07:26,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.57142857142857) internal successors, (732), 7 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) [2022-11-02 21:07:26,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:26,905 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:26,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 21:07:26,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 21:07:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:26,906 INFO L85 PathProgramCache]: Analyzing trace with hash -367514462, now seen corresponding path program 1 times [2022-11-02 21:07:26,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:26,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863122722] [2022-11-02 21:07:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:26,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:07:27,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:27,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863122722] [2022-11-02 21:07:27,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863122722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:27,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:27,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:07:27,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273287720] [2022-11-02 21:07:27,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:27,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:07:27,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:27,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:07:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:07:27,094 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-11-02 21:07:27,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 195 transitions, 1126 flow. Second operand has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:27,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:27,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-11-02 21:07:27,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:30,171 INFO L130 PetriNetUnfolder]: 3430/12390 cut-off events. [2022-11-02 21:07:30,171 INFO L131 PetriNetUnfolder]: For 15827/16396 co-relation queries the response was YES. [2022-11-02 21:07:30,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28941 conditions, 12390 events. 3430/12390 cut-off events. For 15827/16396 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 151541 event pairs, 439 based on Foata normal form. 329/12435 useless extension candidates. Maximal degree in co-relation 28801. Up to 1792 conditions per place. [2022-11-02 21:07:30,440 INFO L137 encePairwiseOnDemand]: 122/136 looper letters, 126 selfloop transitions, 94 changer transitions 0/328 dead transitions. [2022-11-02 21:07:30,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 328 transitions, 2261 flow [2022-11-02 21:07:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:07:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-02 21:07:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1822 transitions. [2022-11-02 21:07:30,446 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8373161764705882 [2022-11-02 21:07:30,447 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1822 transitions. [2022-11-02 21:07:30,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1822 transitions. [2022-11-02 21:07:30,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:30,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1822 transitions. [2022-11-02 21:07:30,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 113.875) internal successors, (1822), 16 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:30,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:30,461 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:30,462 INFO L175 Difference]: Start difference. First operand has 172 places, 195 transitions, 1126 flow. Second operand 16 states and 1822 transitions. [2022-11-02 21:07:30,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 328 transitions, 2261 flow [2022-11-02 21:07:30,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 328 transitions, 2254 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 21:07:30,575 INFO L231 Difference]: Finished difference. Result has 193 places, 226 transitions, 1660 flow [2022-11-02 21:07:30,576 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1660, PETRI_PLACES=193, PETRI_TRANSITIONS=226} [2022-11-02 21:07:30,577 INFO L287 CegarLoopForPetriNet]: 139 programPoint places, 54 predicate places. [2022-11-02 21:07:30,577 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 226 transitions, 1660 flow [2022-11-02 21:07:30,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:30,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:30,579 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:30,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 21:07:30,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 21:07:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2063122850, now seen corresponding path program 2 times [2022-11-02 21:07:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427789604] [2022-11-02 21:07:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:07:30,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427789604] [2022-11-02 21:07:30,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427789604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:30,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:30,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:07:30,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58933420] [2022-11-02 21:07:30,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:30,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:07:30,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:30,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:07:30,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:07:30,805 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-11-02 21:07:30,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 226 transitions, 1660 flow. Second operand has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:30,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:30,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-11-02 21:07:30,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:37,142 INFO L130 PetriNetUnfolder]: 5984/25944 cut-off events. [2022-11-02 21:07:37,142 INFO L131 PetriNetUnfolder]: For 70769/72006 co-relation queries the response was YES. [2022-11-02 21:07:37,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71557 conditions, 25944 events. 5984/25944 cut-off events. For 70769/72006 co-relation queries the response was YES. Maximal size of possible extension queue 1477. Compared 379805 event pairs, 519 based on Foata normal form. 501/25729 useless extension candidates. Maximal degree in co-relation 71405. Up to 3854 conditions per place. [2022-11-02 21:07:37,666 INFO L137 encePairwiseOnDemand]: 122/136 looper letters, 170 selfloop transitions, 169 changer transitions 0/447 dead transitions. [2022-11-02 21:07:37,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 447 transitions, 4145 flow [2022-11-02 21:07:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:07:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 21:07:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2071 transitions. [2022-11-02 21:07:37,672 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8459967320261438 [2022-11-02 21:07:37,672 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2071 transitions. [2022-11-02 21:07:37,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2071 transitions. [2022-11-02 21:07:37,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:37,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2071 transitions. [2022-11-02 21:07:37,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 115.05555555555556) internal successors, (2071), 18 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:37,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:37,687 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:37,688 INFO L175 Difference]: Start difference. First operand has 193 places, 226 transitions, 1660 flow. Second operand 18 states and 2071 transitions. [2022-11-02 21:07:37,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 447 transitions, 4145 flow [2022-11-02 21:07:38,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 447 transitions, 3976 flow, removed 46 selfloop flow, removed 5 redundant places. [2022-11-02 21:07:38,562 INFO L231 Difference]: Finished difference. Result has 215 places, 325 transitions, 3201 flow [2022-11-02 21:07:38,563 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3201, PETRI_PLACES=215, PETRI_TRANSITIONS=325} [2022-11-02 21:07:38,563 INFO L287 CegarLoopForPetriNet]: 139 programPoint places, 76 predicate places. [2022-11-02 21:07:38,564 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 325 transitions, 3201 flow [2022-11-02 21:07:38,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:38,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:38,565 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:38,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 21:07:38,565 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 21:07:38,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:38,566 INFO L85 PathProgramCache]: Analyzing trace with hash -328496307, now seen corresponding path program 1 times [2022-11-02 21:07:38,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:38,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059037825] [2022-11-02 21:07:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:38,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:07:38,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:38,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059037825] [2022-11-02 21:07:38,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059037825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:38,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:38,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:07:38,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287268890] [2022-11-02 21:07:38,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:38,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:07:38,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:07:38,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:07:38,778 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-11-02 21:07:38,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 325 transitions, 3201 flow. Second operand has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:38,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:38,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-11-02 21:07:38,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:46,666 INFO L130 PetriNetUnfolder]: 6964/29881 cut-off events. [2022-11-02 21:07:46,666 INFO L131 PetriNetUnfolder]: For 146090/150014 co-relation queries the response was YES. [2022-11-02 21:07:47,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97401 conditions, 29881 events. 6964/29881 cut-off events. For 146090/150014 co-relation queries the response was YES. Maximal size of possible extension queue 1554. Compared 443429 event pairs, 802 based on Foata normal form. 1172/30495 useless extension candidates. Maximal degree in co-relation 89610. Up to 4333 conditions per place. [2022-11-02 21:07:47,661 INFO L137 encePairwiseOnDemand]: 122/136 looper letters, 305 selfloop transitions, 186 changer transitions 0/620 dead transitions. [2022-11-02 21:07:47,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 620 transitions, 7724 flow [2022-11-02 21:07:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:07:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-02 21:07:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1824 transitions. [2022-11-02 21:07:47,669 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8382352941176471 [2022-11-02 21:07:47,669 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1824 transitions. [2022-11-02 21:07:47,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1824 transitions. [2022-11-02 21:07:47,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:47,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1824 transitions. [2022-11-02 21:07:47,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 114.0) internal successors, (1824), 16 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:47,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:47,685 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:47,685 INFO L175 Difference]: Start difference. First operand has 215 places, 325 transitions, 3201 flow. Second operand 16 states and 1824 transitions. [2022-11-02 21:07:47,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 620 transitions, 7724 flow [2022-11-02 21:07:50,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 620 transitions, 6358 flow, removed 633 selfloop flow, removed 6 redundant places. [2022-11-02 21:07:50,713 INFO L231 Difference]: Finished difference. Result has 228 places, 394 transitions, 4003 flow [2022-11-02 21:07:50,713 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4003, PETRI_PLACES=228, PETRI_TRANSITIONS=394} [2022-11-02 21:07:50,714 INFO L287 CegarLoopForPetriNet]: 139 programPoint places, 89 predicate places. [2022-11-02 21:07:50,714 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 394 transitions, 4003 flow [2022-11-02 21:07:50,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:50,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:50,715 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:50,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 21:07:50,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 21:07:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash -74641143, now seen corresponding path program 2 times [2022-11-02 21:07:50,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:50,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55565933] [2022-11-02 21:07:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:07:50,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:50,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55565933] [2022-11-02 21:07:50,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55565933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:50,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:50,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:07:50,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686914265] [2022-11-02 21:07:50,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:50,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:07:50,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:50,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:07:50,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:07:50,902 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-11-02 21:07:50,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 394 transitions, 4003 flow. Second operand has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:50,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:50,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-11-02 21:07:50,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:00,382 INFO L130 PetriNetUnfolder]: 7747/35020 cut-off events. [2022-11-02 21:08:00,382 INFO L131 PetriNetUnfolder]: For 149702/152425 co-relation queries the response was YES. [2022-11-02 21:08:00,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107628 conditions, 35020 events. 7747/35020 cut-off events. For 149702/152425 co-relation queries the response was YES. Maximal size of possible extension queue 1849. Compared 542727 event pairs, 694 based on Foata normal form. 951/35176 useless extension candidates. Maximal degree in co-relation 107440. Up to 4122 conditions per place. [2022-11-02 21:08:01,038 INFO L137 encePairwiseOnDemand]: 122/136 looper letters, 213 selfloop transitions, 408 changer transitions 0/750 dead transitions. [2022-11-02 21:08:01,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 750 transitions, 8905 flow [2022-11-02 21:08:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:08:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 21:08:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2073 transitions. [2022-11-02 21:08:01,041 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8468137254901961 [2022-11-02 21:08:01,042 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2073 transitions. [2022-11-02 21:08:01,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2073 transitions. [2022-11-02 21:08:01,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:01,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2073 transitions. [2022-11-02 21:08:01,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 115.16666666666667) internal successors, (2073), 18 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:01,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:01,052 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:01,053 INFO L175 Difference]: Start difference. First operand has 228 places, 394 transitions, 4003 flow. Second operand 18 states and 2073 transitions. [2022-11-02 21:08:01,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 750 transitions, 8905 flow [2022-11-02 21:08:03,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 750 transitions, 8476 flow, removed 176 selfloop flow, removed 5 redundant places. [2022-11-02 21:08:03,962 INFO L231 Difference]: Finished difference. Result has 249 places, 595 transitions, 7425 flow [2022-11-02 21:08:03,963 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7425, PETRI_PLACES=249, PETRI_TRANSITIONS=595} [2022-11-02 21:08:03,963 INFO L287 CegarLoopForPetriNet]: 139 programPoint places, 110 predicate places. [2022-11-02 21:08:03,964 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 595 transitions, 7425 flow [2022-11-02 21:08:03,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:03,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:03,965 INFO L208 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] [2022-11-02 21:08:03,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 21:08:03,965 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 21:08:03,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash -887361412, now seen corresponding path program 1 times [2022-11-02 21:08:03,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:03,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810661250] [2022-11-02 21:08:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:03,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:08:03,985 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 21:08:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:08:04,006 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 21:08:04,007 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 21:08:04,007 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-02 21:08:04,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-02 21:08:04,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-02 21:08:04,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-02 21:08:04,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-02 21:08:04,008 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-02 21:08:04,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 21:08:04,009 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-11-02 21:08:04,010 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 21:08:04,010 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-02 21:08:04,037 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 21:08:04,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 158 transitions, 361 flow [2022-11-02 21:08:04,077 INFO L130 PetriNetUnfolder]: 12/238 cut-off events. [2022-11-02 21:08:04,078 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 21:08:04,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 238 events. 12/238 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 520 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 212. Up to 12 conditions per place. [2022-11-02 21:08:04,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 158 transitions, 361 flow [2022-11-02 21:08:04,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 158 transitions, 361 flow [2022-11-02 21:08:04,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:08:04,084 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;@3cc7e842, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:08:04,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 21:08:04,091 INFO L130 PetriNetUnfolder]: 3/70 cut-off events. [2022-11-02 21:08:04,092 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 21:08:04,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:04,092 INFO L208 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] [2022-11-02 21:08:04,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:08:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2054879489, now seen corresponding path program 1 times [2022-11-02 21:08:04,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:04,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603034448] [2022-11-02 21:08:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:08:04,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:04,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603034448] [2022-11-02 21:08:04,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603034448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:04,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:04,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:08:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794808487] [2022-11-02 21:08:04,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:04,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:08:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:08:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:04,218 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 158 [2022-11-02 21:08:04,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 158 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 120.28571428571429) internal successors, (842), 7 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:04,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:04,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 158 [2022-11-02 21:08:04,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:08,170 INFO L130 PetriNetUnfolder]: 9956/22593 cut-off events. [2022-11-02 21:08:08,170 INFO L131 PetriNetUnfolder]: For 11866/11866 co-relation queries the response was YES. [2022-11-02 21:08:08,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41240 conditions, 22593 events. 9956/22593 cut-off events. For 11866/11866 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 232017 event pairs, 909 based on Foata normal form. 7110/29116 useless extension candidates. Maximal degree in co-relation 24585. Up to 4734 conditions per place. [2022-11-02 21:08:08,507 INFO L137 encePairwiseOnDemand]: 135/158 looper letters, 115 selfloop transitions, 24 changer transitions 1/258 dead transitions. [2022-11-02 21:08:08,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 258 transitions, 1048 flow [2022-11-02 21:08:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:08:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 21:08:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1369 transitions. [2022-11-02 21:08:08,510 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8664556962025316 [2022-11-02 21:08:08,510 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1369 transitions. [2022-11-02 21:08:08,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1369 transitions. [2022-11-02 21:08:08,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:08,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1369 transitions. [2022-11-02 21:08:08,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:08,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:08,518 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:08,518 INFO L175 Difference]: Start difference. First operand has 162 places, 158 transitions, 361 flow. Second operand 10 states and 1369 transitions. [2022-11-02 21:08:08,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 258 transitions, 1048 flow [2022-11-02 21:08:08,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 258 transitions, 944 flow, removed 52 selfloop flow, removed 0 redundant places. [2022-11-02 21:08:08,526 INFO L231 Difference]: Finished difference. Result has 172 places, 167 transitions, 493 flow [2022-11-02 21:08:08,527 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=493, PETRI_PLACES=172, PETRI_TRANSITIONS=167} [2022-11-02 21:08:08,527 INFO L287 CegarLoopForPetriNet]: 162 programPoint places, 10 predicate places. [2022-11-02 21:08:08,527 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 167 transitions, 493 flow [2022-11-02 21:08:08,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.28571428571429) internal successors, (842), 7 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:08,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:08,528 INFO L208 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] [2022-11-02 21:08:08,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 21:08:08,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:08:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:08,529 INFO L85 PathProgramCache]: Analyzing trace with hash 989074183, now seen corresponding path program 1 times [2022-11-02 21:08:08,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:08,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055197564] [2022-11-02 21:08:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:08,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:08:08,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055197564] [2022-11-02 21:08:08,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055197564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:08,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:08,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:08:08,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539266841] [2022-11-02 21:08:08,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:08,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:08:08,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:08:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:08,658 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 158 [2022-11-02 21:08:08,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 167 transitions, 493 flow. Second operand has 7 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:08,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:08,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 158 [2022-11-02 21:08:08,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:15,820 INFO L130 PetriNetUnfolder]: 14628/36981 cut-off events. [2022-11-02 21:08:15,820 INFO L131 PetriNetUnfolder]: For 27931/28545 co-relation queries the response was YES. [2022-11-02 21:08:16,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84532 conditions, 36981 events. 14628/36981 cut-off events. For 27931/28545 co-relation queries the response was YES. Maximal size of possible extension queue 1654. Compared 446460 event pairs, 1987 based on Foata normal form. 416/36603 useless extension candidates. Maximal degree in co-relation 71592. Up to 7343 conditions per place. [2022-11-02 21:08:16,797 INFO L137 encePairwiseOnDemand]: 142/158 looper letters, 113 selfloop transitions, 44 changer transitions 0/278 dead transitions. [2022-11-02 21:08:16,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 278 transitions, 1348 flow [2022-11-02 21:08:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:08:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 21:08:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1329 transitions. [2022-11-02 21:08:16,801 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8411392405063292 [2022-11-02 21:08:16,801 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1329 transitions. [2022-11-02 21:08:16,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1329 transitions. [2022-11-02 21:08:16,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:16,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1329 transitions. [2022-11-02 21:08:16,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 132.9) internal successors, (1329), 10 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:16,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:16,809 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:16,809 INFO L175 Difference]: Start difference. First operand has 172 places, 167 transitions, 493 flow. Second operand 10 states and 1329 transitions. [2022-11-02 21:08:16,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 278 transitions, 1348 flow [2022-11-02 21:08:17,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 278 transitions, 1346 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:08:17,073 INFO L231 Difference]: Finished difference. Result has 183 places, 191 transitions, 767 flow [2022-11-02 21:08:17,073 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=767, PETRI_PLACES=183, PETRI_TRANSITIONS=191} [2022-11-02 21:08:17,073 INFO L287 CegarLoopForPetriNet]: 162 programPoint places, 21 predicate places. [2022-11-02 21:08:17,074 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 191 transitions, 767 flow [2022-11-02 21:08:17,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:17,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:17,074 INFO L208 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] [2022-11-02 21:08:17,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 21:08:17,075 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 21:08:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:17,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1900820306, now seen corresponding path program 1 times [2022-11-02 21:08:17,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:17,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083944071] [2022-11-02 21:08:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:17,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:08:17,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:17,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083944071] [2022-11-02 21:08:17,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083944071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:17,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:17,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:08:17,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734508246] [2022-11-02 21:08:17,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:17,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:08:17,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:17,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:08:17,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:17,200 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 158 [2022-11-02 21:08:17,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 191 transitions, 767 flow. Second operand has 7 states, 7 states have (on average 120.57142857142857) internal successors, (844), 7 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:08:17,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:17,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 158 [2022-11-02 21:08:17,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand