./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/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_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/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_2e56ed29-53d1-4972-b86d-8607c164ab6c/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 6959d4f0e51834399b1f177b2907c6f040a7f82b22df70a4ffbb4c40805c24f4 --- 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 20:14:26,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:14:26,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:14:26,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:14:26,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:14:26,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:14:26,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:14:26,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:14:26,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:14:26,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:14:26,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:14:26,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:14:26,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:14:26,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:14:26,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:14:26,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:14:26,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:14:26,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:14:26,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:14:26,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:14:26,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:14:26,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:14:26,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:14:26,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:14:26,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:14:26,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:14:26,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:14:26,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:14:26,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:14:26,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:14:26,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:14:26,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:14:26,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:14:26,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:14:26,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:14:26,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:14:26,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:14:26,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:14:26,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:14:26,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:14:26,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:14:26,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:14:26,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:14:26,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:14:26,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:14:26,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:14:26,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:14:26,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:14:26,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:14:26,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:14:26,946 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:14:26,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:14:26,947 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:14:26,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:14:26,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:14:26,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:14:26,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:14:26,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:14:26,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:14:26,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:14:26,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:14:26,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:14:26,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:14:26,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:14:26,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:14:26,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:14:26,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:14:26,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:14:26,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:14:26,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:14:26,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:14:26,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:14:26,953 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:14:26,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:14:26,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:14:26,954 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_2e56ed29-53d1-4972-b86d-8607c164ab6c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6959d4f0e51834399b1f177b2907c6f040a7f82b22df70a4ffbb4c40805c24f4 [2022-11-02 20:14:27,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:14:27,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:14:27,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:14:27,345 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:14:27,345 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:14:27,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread/fib_safe-6.i [2022-11-02 20:14:27,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/data/8b22c4fca/0194acd6ec1c4e299e4afb4734722288/FLAG0e773da13 [2022-11-02 20:14:28,005 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:14:28,005 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/sv-benchmarks/c/pthread/fib_safe-6.i [2022-11-02 20:14:28,018 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/data/8b22c4fca/0194acd6ec1c4e299e4afb4734722288/FLAG0e773da13 [2022-11-02 20:14:28,283 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/data/8b22c4fca/0194acd6ec1c4e299e4afb4734722288 [2022-11-02 20:14:28,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:14:28,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:14:28,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:14:28,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:14:28,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:14:28,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:28,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed40ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28, skipping insertion in model container [2022-11-02 20:14:28,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:28,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:14:28,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:14:28,768 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_2e56ed29-53d1-4972-b86d-8607c164ab6c/sv-benchmarks/c/pthread/fib_safe-6.i[30813,30826] [2022-11-02 20:14:28,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:14:28,788 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:14:28,867 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_2e56ed29-53d1-4972-b86d-8607c164ab6c/sv-benchmarks/c/pthread/fib_safe-6.i[30813,30826] [2022-11-02 20:14:28,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:14:28,917 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:14:28,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28 WrapperNode [2022-11-02 20:14:28,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:14:28,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:14:28,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:14:28,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:14:28,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:28,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:28,986 INFO L138 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-11-02 20:14:28,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:14:28,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:14:28,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:14:28,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:14:28,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:28,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:29,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:29,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:29,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:29,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:29,026 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:29,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:29,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:14:29,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:14:29,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:14:29,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:14:29,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (1/1) ... [2022-11-02 20:14:29,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:14:29,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:29,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:14:29,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:14:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-02 20:14:29,122 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-02 20:14:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-02 20:14:29,123 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-02 20:14:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:14:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:14:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:14:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:14:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:14:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:14:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:14:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:14:29,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:14:29,127 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 20:14:29,284 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:14:29,287 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:14:29,549 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:14:29,557 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:14:29,557 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:14:29,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:14:29 BoogieIcfgContainer [2022-11-02 20:14:29,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:14:29,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:14:29,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:14:29,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:14:29,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:14:28" (1/3) ... [2022-11-02 20:14:29,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49235ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:14:29, skipping insertion in model container [2022-11-02 20:14:29,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:14:28" (2/3) ... [2022-11-02 20:14:29,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49235ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:14:29, skipping insertion in model container [2022-11-02 20:14:29,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:14:29" (3/3) ... [2022-11-02 20:14:29,582 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2022-11-02 20:14:29,595 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:14:29,607 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:14:29,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:14:29,608 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:14:29,675 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:14:29,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2022-11-02 20:14:29,787 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-02 20:14:29,787 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:14:29,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2022-11-02 20:14:29,793 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 96 transitions, 202 flow [2022-11-02 20:14:29,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 194 flow [2022-11-02 20:14:29,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:14:29,817 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;@293e7cdc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:14:29,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:14:29,893 INFO L130 PetriNetUnfolder]: 6/84 cut-off events. [2022-11-02 20:14:29,893 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:14:29,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:29,894 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:29,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:14:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:29,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1927097680, now seen corresponding path program 1 times [2022-11-02 20:14:29,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:29,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719045438] [2022-11-02 20:14:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:29,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,276 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 20:14:30,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:30,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719045438] [2022-11-02 20:14:30,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719045438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:30,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:30,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:14:30,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336207353] [2022-11-02 20:14:30,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:30,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:14:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:14:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:14:30,353 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 96 [2022-11-02 20:14:30,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 20:14:30,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:30,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 96 [2022-11-02 20:14:30,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:30,416 INFO L130 PetriNetUnfolder]: 3/89 cut-off events. [2022-11-02 20:14:30,417 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:14:30,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 3/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 5/90 useless extension candidates. Maximal degree in co-relation 60. Up to 3 conditions per place. [2022-11-02 20:14:30,419 INFO L137 encePairwiseOnDemand]: 92/96 looper letters, 2 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2022-11-02 20:14:30,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 188 flow [2022-11-02 20:14:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:14:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:14:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2022-11-02 20:14:30,437 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2022-11-02 20:14:30,439 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2022-11-02 20:14:30,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2022-11-02 20:14:30,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:30,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2022-11-02 20:14:30,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 20:14:30,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 20:14:30,463 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 20:14:30,465 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 194 flow. Second operand 2 states and 184 transitions. [2022-11-02 20:14:30,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 188 flow [2022-11-02 20:14:30,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:14:30,483 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 182 flow [2022-11-02 20:14:30,485 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2022-11-02 20:14:30,489 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places. [2022-11-02 20:14:30,489 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 182 flow [2022-11-02 20:14:30,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 20:14:30,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:30,490 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:30,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:14:30,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:14:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:30,492 INFO L85 PathProgramCache]: Analyzing trace with hash 560415153, now seen corresponding path program 1 times [2022-11-02 20:14:30,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:30,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448571027] [2022-11-02 20:14:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:30,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:30,743 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 20:14:30,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:30,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448571027] [2022-11-02 20:14:30,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448571027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:30,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:30,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:14:30,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532075809] [2022-11-02 20:14:30,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:30,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:14:30,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:14:30,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:14:30,754 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 96 [2022-11-02 20:14:30,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 20:14:30,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:30,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 96 [2022-11-02 20:14:30,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:30,829 INFO L130 PetriNetUnfolder]: 3/95 cut-off events. [2022-11-02 20:14:30,829 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:14:30,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 95 events. 3/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-11-02 20:14:30,834 INFO L137 encePairwiseOnDemand]: 93/96 looper letters, 9 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-11-02 20:14:30,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 210 flow [2022-11-02 20:14:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:14:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:14:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2022-11-02 20:14:30,841 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.90625 [2022-11-02 20:14:30,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2022-11-02 20:14:30,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2022-11-02 20:14:30,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:30,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2022-11-02 20:14:30,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 20:14:30,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 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 20:14:30,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 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 20:14:30,846 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 182 flow. Second operand 3 states and 261 transitions. [2022-11-02 20:14:30,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 210 flow [2022-11-02 20:14:30,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:14:30,848 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 194 flow [2022-11-02 20:14:30,848 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2022-11-02 20:14:30,849 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2022-11-02 20:14:30,849 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 194 flow [2022-11-02 20:14:30,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 20:14:30,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:30,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:30,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:14:30,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:14:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:30,851 INFO L85 PathProgramCache]: Analyzing trace with hash -951035470, now seen corresponding path program 1 times [2022-11-02 20:14:30,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:30,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654763503] [2022-11-02 20:14:30,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:30,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:31,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654763503] [2022-11-02 20:14:31,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654763503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93482131] [2022-11-02 20:14:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:31,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:31,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:31,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:31,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:14:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:31,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:14:31,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:31,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:31,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93482131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:31,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:31,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:14:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125927143] [2022-11-02 20:14:31,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:31,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:14:31,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:14:31,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:14:31,350 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-11-02 20:14:31,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 194 flow. Second operand has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 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 20:14:31,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:31,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-11-02 20:14:31,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:31,473 INFO L130 PetriNetUnfolder]: 3/104 cut-off events. [2022-11-02 20:14:31,474 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 20:14:31,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 104 events. 3/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 133. Up to 6 conditions per place. [2022-11-02 20:14:31,478 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 10 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2022-11-02 20:14:31,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 250 flow [2022-11-02 20:14:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:14:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:14:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 750 transitions. [2022-11-02 20:14:31,481 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8680555555555556 [2022-11-02 20:14:31,481 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 750 transitions. [2022-11-02 20:14:31,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 750 transitions. [2022-11-02 20:14:31,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:31,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 750 transitions. [2022-11-02 20:14:31,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.33333333333333) internal successors, (750), 9 states have internal predecessors, (750), 0 states have call successors, (0), 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 20:14:31,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 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 20:14:31,490 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 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 20:14:31,490 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 194 flow. Second operand 9 states and 750 transitions. [2022-11-02 20:14:31,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 250 flow [2022-11-02 20:14:31,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:14:31,493 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 242 flow [2022-11-02 20:14:31,494 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2022-11-02 20:14:31,494 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2022-11-02 20:14:31,495 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 242 flow [2022-11-02 20:14:31,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 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 20:14:31,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:31,496 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:31,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:14:31,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:31,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:14:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:31,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1666707666, now seen corresponding path program 2 times [2022-11-02 20:14:31,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:31,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363051567] [2022-11-02 20:14:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:31,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:31,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:31,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363051567] [2022-11-02 20:14:31,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363051567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:31,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131509572] [2022-11-02 20:14:31,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:14:31,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:31,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:31,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:14:32,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:14:32,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:32,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:14:32,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:32,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:32,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131509572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:32,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:32,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:14:32,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183152273] [2022-11-02 20:14:32,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:32,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:14:32,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:32,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:14:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:14:32,349 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-11-02 20:14:32,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 242 flow. Second operand has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 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 20:14:32,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:32,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-11-02 20:14:32,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:32,624 INFO L130 PetriNetUnfolder]: 3/132 cut-off events. [2022-11-02 20:14:32,624 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:14:32,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 132 events. 3/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place. [2022-11-02 20:14:32,626 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 14 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2022-11-02 20:14:32,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 114 transitions, 408 flow [2022-11-02 20:14:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:14:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:14:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1740 transitions. [2022-11-02 20:14:32,631 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381 [2022-11-02 20:14:32,631 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1740 transitions. [2022-11-02 20:14:32,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1740 transitions. [2022-11-02 20:14:32,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:32,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1740 transitions. [2022-11-02 20:14:32,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.85714285714286) internal successors, (1740), 21 states have internal predecessors, (1740), 0 states have call successors, (0), 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 20:14:32,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 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 20:14:32,643 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 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 20:14:32,643 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 242 flow. Second operand 21 states and 1740 transitions. [2022-11-02 20:14:32,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 114 transitions, 408 flow [2022-11-02 20:14:32,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 394 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:14:32,648 INFO L231 Difference]: Finished difference. Result has 129 places, 109 transitions, 366 flow [2022-11-02 20:14:32,648 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=366, PETRI_PLACES=129, PETRI_TRANSITIONS=109} [2022-11-02 20:14:32,649 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 35 predicate places. [2022-11-02 20:14:32,649 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 109 transitions, 366 flow [2022-11-02 20:14:32,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 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 20:14:32,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:32,650 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:32,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-02 20:14:32,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:32,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:14:32,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:32,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1283180782, now seen corresponding path program 3 times [2022-11-02 20:14:32,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:32,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680069676] [2022-11-02 20:14:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:32,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:33,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:33,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680069676] [2022-11-02 20:14:33,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680069676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:33,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774802886] [2022-11-02 20:14:33,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:14:33,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:33,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:33,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:33,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:14:33,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:14:33,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:33,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:14:33,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:33,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:34,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774802886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:34,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:34,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2022-11-02 20:14:34,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626114666] [2022-11-02 20:14:34,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:34,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:14:34,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:34,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:14:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:14:34,010 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-11-02 20:14:34,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 109 transitions, 366 flow. Second operand has 31 states, 31 states have (on average 83.06451612903226) internal successors, (2575), 31 states have internal predecessors, (2575), 0 states have call successors, (0), 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 20:14:34,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:34,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-11-02 20:14:34,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:34,713 INFO L130 PetriNetUnfolder]: 3/181 cut-off events. [2022-11-02 20:14:34,714 INFO L131 PetriNetUnfolder]: For 236/236 co-relation queries the response was YES. [2022-11-02 20:14:34,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 181 events. 3/181 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 7/185 useless extension candidates. Maximal degree in co-relation 415. Up to 25 conditions per place. [2022-11-02 20:14:34,718 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 21 selfloop transitions, 42 changer transitions 0/142 dead transitions. [2022-11-02 20:14:34,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 142 transitions, 748 flow [2022-11-02 20:14:34,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 20:14:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-02 20:14:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3472 transitions. [2022-11-02 20:14:34,727 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2022-11-02 20:14:34,727 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3472 transitions. [2022-11-02 20:14:34,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3472 transitions. [2022-11-02 20:14:34,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:34,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3472 transitions. [2022-11-02 20:14:34,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 82.66666666666667) internal successors, (3472), 42 states have internal predecessors, (3472), 0 states have call successors, (0), 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 20:14:34,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 96.0) internal successors, (4128), 43 states have internal predecessors, (4128), 0 states have call successors, (0), 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 20:14:34,748 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 96.0) internal successors, (4128), 43 states have internal predecessors, (4128), 0 states have call successors, (0), 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 20:14:34,748 INFO L175 Difference]: Start difference. First operand has 129 places, 109 transitions, 366 flow. Second operand 42 states and 3472 transitions. [2022-11-02 20:14:34,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 142 transitions, 748 flow [2022-11-02 20:14:34,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 142 transitions, 710 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-11-02 20:14:34,760 INFO L231 Difference]: Finished difference. Result has 172 places, 131 transitions, 614 flow [2022-11-02 20:14:34,761 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=614, PETRI_PLACES=172, PETRI_TRANSITIONS=131} [2022-11-02 20:14:34,764 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 78 predicate places. [2022-11-02 20:14:34,765 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 131 transitions, 614 flow [2022-11-02 20:14:34,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 83.06451612903226) internal successors, (2575), 31 states have internal predecessors, (2575), 0 states have call successors, (0), 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 20:14:34,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:34,766 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:34,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:34,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:34,989 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:14:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:34,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2049692625, now seen corresponding path program 4 times [2022-11-02 20:14:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:34,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357171650] [2022-11-02 20:14:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:34,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:38,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:38,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357171650] [2022-11-02 20:14:38,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357171650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:38,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244417248] [2022-11-02 20:14:38,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:14:38,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:38,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:38,450 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:38,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e56ed29-53d1-4972-b86d-8607c164ab6c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:14:38,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:14:38,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:38,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:14:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 486 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:43,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:49,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244417248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:49,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:49,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 139 [2022-11-02 20:14:49,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087763030] [2022-11-02 20:14:49,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:49,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-11-02 20:14:49,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:49,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-11-02 20:14:49,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=17941, Unknown=0, NotChecked=0, Total=19182 [2022-11-02 20:14:49,475 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 96 [2022-11-02 20:14:49,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 131 transitions, 614 flow. Second operand has 139 states, 139 states have (on average 69.23741007194245) internal successors, (9624), 139 states have internal predecessors, (9624), 0 states have call successors, (0), 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 20:14:49,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:49,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 96 [2022-11-02 20:14:49,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand