./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12_variant.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_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/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_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12_variant.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/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_47bf11d9-4e50-4879-833b-001f93eab2a8/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 7be74b3f1207f4387a275e1f4e0e57734d5f1b215282bd8d49efde8c6948d207 --- 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 21:06:43,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:06:43,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:06:43,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:06:43,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:06:43,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:06:43,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:06:43,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:06:43,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:06:43,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:06:43,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:06:43,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:06:43,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:06:43,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:06:43,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:06:43,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:06:43,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:06:43,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:06:43,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:06:43,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:06:43,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:06:43,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:06:43,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:06:43,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:06:43,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:06:43,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:06:43,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:06:43,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:06:43,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:06:43,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:06:43,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:06:43,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:06:43,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:06:43,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:06:43,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:06:43,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:06:43,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:06:43,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:06:43,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:06:43,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:06:43,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:06:43,757 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:06:43,811 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:06:43,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:06:43,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:06:43,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:06:43,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:06:43,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:06:43,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:06:43,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:06:43,813 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:06:43,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:06:43,814 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:06:43,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:06:43,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:06:43,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:06:43,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:06:43,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:06:43,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:06:43,815 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:06:43,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:06:43,815 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:06:43,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:06:43,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:06:43,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:06:43,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:06:43,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:06:43,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:06:43,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:06:43,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:06:43,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:06:43,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:06:43,817 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:06:43,817 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:06:43,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:06:43,817 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_47bf11d9-4e50-4879-833b-001f93eab2a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be74b3f1207f4387a275e1f4e0e57734d5f1b215282bd8d49efde8c6948d207 [2022-11-02 21:06:44,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:06:44,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:06:44,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:06:44,128 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:06:44,129 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:06:44,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread-lit/sssc12_variant.i [2022-11-02 21:06:44,194 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/data/53d515a02/4c3e8ad2f8974410ba63948573ff85d2/FLAG4e9b41415 [2022-11-02 21:06:44,756 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:06:44,757 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/sv-benchmarks/c/pthread-lit/sssc12_variant.i [2022-11-02 21:06:44,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/data/53d515a02/4c3e8ad2f8974410ba63948573ff85d2/FLAG4e9b41415 [2022-11-02 21:06:45,011 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/data/53d515a02/4c3e8ad2f8974410ba63948573ff85d2 [2022-11-02 21:06:45,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:06:45,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:06:45,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:06:45,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:06:45,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:06:45,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a9d0d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45, skipping insertion in model container [2022-11-02 21:06:45,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:06:45,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:06:45,544 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_47bf11d9-4e50-4879-833b-001f93eab2a8/sv-benchmarks/c/pthread-lit/sssc12_variant.i[46865,46878] [2022-11-02 21:06:45,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:06:45,569 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:06:45,603 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_47bf11d9-4e50-4879-833b-001f93eab2a8/sv-benchmarks/c/pthread-lit/sssc12_variant.i[46865,46878] [2022-11-02 21:06:45,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:06:45,674 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:06:45,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45 WrapperNode [2022-11-02 21:06:45,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:06:45,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:06:45,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:06:45,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:06:45,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,750 INFO L138 Inliner]: procedures = 275, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2022-11-02 21:06:45,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:06:45,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:06:45,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:06:45,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:06:45,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:06:45,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:06:45,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:06:45,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:06:45,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (1/1) ... [2022-11-02 21:06:45,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:06:45,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:45,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:06:45,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bf11d9-4e50-4879-833b-001f93eab2a8/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:06:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 21:06:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-11-02 21:06:45,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-11-02 21:06:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:06:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:06:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 21:06:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:06:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:06:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:06:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:06:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:06:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:06:45,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:06:45,930 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 21:06:46,063 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:06:46,065 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:06:46,240 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:06:46,288 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:06:46,290 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 21:06:46,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:06:46 BoogieIcfgContainer [2022-11-02 21:06:46,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:06:46,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:06:46,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:06:46,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:06:46,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:06:45" (1/3) ... [2022-11-02 21:06:46,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5cf933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:06:46, skipping insertion in model container [2022-11-02 21:06:46,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:45" (2/3) ... [2022-11-02 21:06:46,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5cf933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:06:46, skipping insertion in model container [2022-11-02 21:06:46,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:06:46" (3/3) ... [2022-11-02 21:06:46,329 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12_variant.i [2022-11-02 21:06:46,338 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 21:06:46,365 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:06:46,365 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:06:46,365 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 21:06:46,452 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 21:06:46,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 181 flow [2022-11-02 21:06:46,560 INFO L130 PetriNetUnfolder]: 7/100 cut-off events. [2022-11-02 21:06:46,561 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 21:06:46,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 100 events. 7/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2022-11-02 21:06:46,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 88 transitions, 181 flow [2022-11-02 21:06:46,570 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 88 transitions, 181 flow [2022-11-02 21:06:46,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:06:46,590 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;@6ccc756b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:06:46,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 21:06:46,626 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2022-11-02 21:06:46,628 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 21:06:46,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:06:46,629 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] [2022-11-02 21:06:46,630 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 21:06:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:46,638 INFO L85 PathProgramCache]: Analyzing trace with hash 178627719, now seen corresponding path program 1 times [2022-11-02 21:06:46,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:46,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132662642] [2022-11-02 21:06:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:46,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:06:46,785 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 21:06:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:06:46,873 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 21:06:46,877 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 21:06:46,882 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-02 21:06:46,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-02 21:06:46,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-02 21:06:46,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:06:46,895 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 21:06:46,908 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 21:06:46,908 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 21:06:46,979 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 21:06:46,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 125 transitions, 262 flow [2022-11-02 21:06:47,063 INFO L130 PetriNetUnfolder]: 12/151 cut-off events. [2022-11-02 21:06:47,063 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 21:06:47,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 12/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 270 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2022-11-02 21:06:47,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 125 transitions, 262 flow [2022-11-02 21:06:47,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 125 transitions, 262 flow [2022-11-02 21:06:47,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:06:47,085 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;@6ccc756b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:06:47,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 21:06:47,118 INFO L130 PetriNetUnfolder]: 6/100 cut-off events. [2022-11-02 21:06:47,122 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 21:06:47,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:06:47,123 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-02 21:06:47,123 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 21:06:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash 485553204, now seen corresponding path program 1 times [2022-11-02 21:06:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166789323] [2022-11-02 21:06:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:47,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:06:47,199 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 21:06:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:06:47,235 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 21:06:47,235 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 21:06:47,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-02 21:06:47,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-02 21:06:47,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-02 21:06:47,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-02 21:06:47,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:06:47,237 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 21:06:47,238 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 21:06:47,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 21:06:47,273 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 21:06:47,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 162 transitions, 345 flow [2022-11-02 21:06:47,320 INFO L130 PetriNetUnfolder]: 17/202 cut-off events. [2022-11-02 21:06:47,320 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 21:06:47,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 202 events. 17/202 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 480 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-11-02 21:06:47,324 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 162 transitions, 345 flow [2022-11-02 21:06:47,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 162 transitions, 345 flow [2022-11-02 21:06:47,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:06:47,330 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;@6ccc756b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:06:47,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 21:06:47,367 INFO L130 PetriNetUnfolder]: 9/146 cut-off events. [2022-11-02 21:06:47,370 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 21:06:47,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:06:47,371 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-11-02 21:06:47,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 21:06:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1781292582, now seen corresponding path program 1 times [2022-11-02 21:06:47,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:47,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289887211] [2022-11-02 21:06:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:47,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:06:47,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 21:06:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:06:47,461 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 21:06:47,461 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 21:06:47,462 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 21:06:47,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 21:06:47,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-02 21:06:47,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 21:06:47,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 21:06:47,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:06:47,463 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 21:06:47,464 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 21:06:47,465 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 21:06:47,501 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 21:06:47,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 199 transitions, 430 flow [2022-11-02 21:06:47,552 INFO L130 PetriNetUnfolder]: 22/253 cut-off events. [2022-11-02 21:06:47,552 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 21:06:47,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 253 events. 22/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 700 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 210. Up to 10 conditions per place. [2022-11-02 21:06:47,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 199 transitions, 430 flow [2022-11-02 21:06:47,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 199 transitions, 430 flow [2022-11-02 21:06:47,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:06:47,562 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;@6ccc756b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:06:47,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 21:06:47,583 INFO L130 PetriNetUnfolder]: 9/151 cut-off events. [2022-11-02 21:06:47,584 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 21:06:47,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:06:47,584 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, 1] [2022-11-02 21:06:47,585 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 21:06:47,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1586586166, now seen corresponding path program 1 times [2022-11-02 21:06:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:47,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457794776] [2022-11-02 21:06:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:47,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:47,935 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 21:06:47,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457794776] [2022-11-02 21:06:47,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457794776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:47,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:47,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:06:47,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992614508] [2022-11-02 21:06:47,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:47,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:06:47,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:06:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:06:48,017 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 199 [2022-11-02 21:06:48,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 199 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 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 21:06:48,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:06:48,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 199 [2022-11-02 21:06:48,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:06:49,981 INFO L130 PetriNetUnfolder]: 1812/7147 cut-off events. [2022-11-02 21:06:49,982 INFO L131 PetriNetUnfolder]: For 1954/1954 co-relation queries the response was YES. [2022-11-02 21:06:50,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10386 conditions, 7147 events. 1812/7147 cut-off events. For 1954/1954 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 75622 event pairs, 992 based on Foata normal form. 1834/8290 useless extension candidates. Maximal degree in co-relation 6880. Up to 1573 conditions per place. [2022-11-02 21:06:50,098 INFO L137 encePairwiseOnDemand]: 184/199 looper letters, 42 selfloop transitions, 3 changer transitions 1/198 dead transitions. [2022-11-02 21:06:50,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 198 transitions, 560 flow [2022-11-02 21:06:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:06:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-02 21:06:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 710 transitions. [2022-11-02 21:06:50,119 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8919597989949749 [2022-11-02 21:06:50,119 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 710 transitions. [2022-11-02 21:06:50,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 710 transitions. [2022-11-02 21:06:50,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:06:50,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 710 transitions. [2022-11-02 21:06:50,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 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 21:06:50,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 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 21:06:50,144 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 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 21:06:50,146 INFO L175 Difference]: Start difference. First operand has 190 places, 199 transitions, 430 flow. Second operand 4 states and 710 transitions. [2022-11-02 21:06:50,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 198 transitions, 560 flow [2022-11-02 21:06:50,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 198 transitions, 536 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-11-02 21:06:50,160 INFO L231 Difference]: Finished difference. Result has 183 places, 177 transitions, 384 flow [2022-11-02 21:06:50,162 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=183, PETRI_TRANSITIONS=177} [2022-11-02 21:06:50,166 INFO L287 CegarLoopForPetriNet]: 190 programPoint places, -7 predicate places. [2022-11-02 21:06:50,166 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 177 transitions, 384 flow [2022-11-02 21:06:50,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 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 21:06:50,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:06:50,167 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, 1, 1, 1, 1] [2022-11-02 21:06:50,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:06:50,167 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 21:06:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:50,168 INFO L85 PathProgramCache]: Analyzing trace with hash -893966395, now seen corresponding path program 1 times [2022-11-02 21:06:50,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:50,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642722070] [2022-11-02 21:06:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:50,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:50,483 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 21:06:50,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:50,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642722070] [2022-11-02 21:06:50,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642722070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:50,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:50,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:06:50,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922289732] [2022-11-02 21:06:50,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:50,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:06:50,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:50,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:06:50,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:06:50,489 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 199 [2022-11-02 21:06:50,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 177 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 0 states have call successors, (0), 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 21:06:50,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:06:50,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 199 [2022-11-02 21:06:50,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:38,694 INFO L130 PetriNetUnfolder]: 93033/198443 cut-off events. [2022-11-02 21:07:38,694 INFO L131 PetriNetUnfolder]: For 7802/7802 co-relation queries the response was YES. [2022-11-02 21:07:39,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329031 conditions, 198443 events. 93033/198443 cut-off events. For 7802/7802 co-relation queries the response was YES. Maximal size of possible extension queue 5800. Compared 2554505 event pairs, 24595 based on Foata normal form. 0/183178 useless extension candidates. Maximal degree in co-relation 280393. Up to 38577 conditions per place. [2022-11-02 21:07:41,582 INFO L137 encePairwiseOnDemand]: 186/199 looper letters, 273 selfloop transitions, 48 changer transitions 0/457 dead transitions. [2022-11-02 21:07:41,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 457 transitions, 1780 flow [2022-11-02 21:07:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:07:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-02 21:07:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2468 transitions. [2022-11-02 21:07:41,589 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8268006700167504 [2022-11-02 21:07:41,589 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2468 transitions. [2022-11-02 21:07:41,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2468 transitions. [2022-11-02 21:07:41,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:41,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2468 transitions. [2022-11-02 21:07:41,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.53333333333333) internal successors, (2468), 15 states have internal predecessors, (2468), 0 states have call successors, (0), 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 21:07:41,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 199.0) internal successors, (3184), 16 states have internal predecessors, (3184), 0 states have call successors, (0), 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 21:07:41,607 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 199.0) internal successors, (3184), 16 states have internal predecessors, (3184), 0 states have call successors, (0), 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 21:07:41,608 INFO L175 Difference]: Start difference. First operand has 183 places, 177 transitions, 384 flow. Second operand 15 states and 2468 transitions. [2022-11-02 21:07:41,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 457 transitions, 1780 flow [2022-11-02 21:07:41,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 457 transitions, 1774 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-02 21:07:41,644 INFO L231 Difference]: Finished difference. Result has 203 places, 227 transitions, 733 flow [2022-11-02 21:07:41,644 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=733, PETRI_PLACES=203, PETRI_TRANSITIONS=227} [2022-11-02 21:07:41,646 INFO L287 CegarLoopForPetriNet]: 190 programPoint places, 13 predicate places. [2022-11-02 21:07:41,647 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 227 transitions, 733 flow [2022-11-02 21:07:41,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 0 states have call successors, (0), 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 21:07:41,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:41,649 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:41,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:07:41,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 21:07:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:41,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1090530460, now seen corresponding path program 1 times [2022-11-02 21:07:41,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:41,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428737669] [2022-11-02 21:07:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:41,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:07:41,716 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 21:07:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:07:41,752 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 21:07:41,755 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 21:07:41,756 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-02 21:07:41,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-02 21:07:41,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-02 21:07:41,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-02 21:07:41,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-02 21:07:41,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-02 21:07:41,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:07:41,758 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 21:07:41,759 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 21:07:41,759 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-02 21:07:41,820 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 21:07:41,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 236 transitions, 517 flow [2022-11-02 21:07:41,887 INFO L130 PetriNetUnfolder]: 27/304 cut-off events. [2022-11-02 21:07:41,887 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 21:07:41,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 304 events. 27/304 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 917 event pairs, 0 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 266. Up to 12 conditions per place. [2022-11-02 21:07:41,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 236 transitions, 517 flow [2022-11-02 21:07:41,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 225 places, 236 transitions, 517 flow [2022-11-02 21:07:41,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:07:41,908 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;@6ccc756b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:07:41,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 21:07:41,928 INFO L130 PetriNetUnfolder]: 9/152 cut-off events. [2022-11-02 21:07:41,928 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 21:07:41,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:41,929 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, 1] [2022-11-02 21:07:41,929 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 21:07:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:41,930 INFO L85 PathProgramCache]: Analyzing trace with hash -341254586, now seen corresponding path program 1 times [2022-11-02 21:07:41,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:41,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496860360] [2022-11-02 21:07:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:41,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:42,061 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 21:07:42,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:42,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496860360] [2022-11-02 21:07:42,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496860360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:42,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:42,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:07:42,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612834737] [2022-11-02 21:07:42,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:42,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:07:42,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:42,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:07:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:07:42,065 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 236 [2022-11-02 21:07:42,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 236 transitions, 517 flow. Second operand has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 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 21:07:42,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:42,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 236 [2022-11-02 21:07:42,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:46,985 INFO L130 PetriNetUnfolder]: 7800/32460 cut-off events. [2022-11-02 21:07:46,985 INFO L131 PetriNetUnfolder]: For 9233/9233 co-relation queries the response was YES. [2022-11-02 21:07:47,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44507 conditions, 32460 events. 7800/32460 cut-off events. For 9233/9233 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 444460 event pairs, 5308 based on Foata normal form. 6928/36162 useless extension candidates. Maximal degree in co-relation 15624. Up to 5846 conditions per place. [2022-11-02 21:07:47,925 INFO L137 encePairwiseOnDemand]: 219/236 looper letters, 51 selfloop transitions, 3 changer transitions 1/238 dead transitions. [2022-11-02 21:07:47,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 238 transitions, 693 flow [2022-11-02 21:07:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:07:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-02 21:07:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2022-11-02 21:07:47,931 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.899364406779661 [2022-11-02 21:07:47,931 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2022-11-02 21:07:47,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2022-11-02 21:07:47,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:47,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2022-11-02 21:07:47,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 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 21:07:47,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 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 21:07:47,938 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 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 21:07:47,939 INFO L175 Difference]: Start difference. First operand has 225 places, 236 transitions, 517 flow. Second operand 4 states and 849 transitions. [2022-11-02 21:07:47,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 238 transitions, 693 flow [2022-11-02 21:07:47,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 238 transitions, 649 flow, removed 22 selfloop flow, removed 0 redundant places. [2022-11-02 21:07:47,954 INFO L231 Difference]: Finished difference. Result has 217 places, 211 transitions, 457 flow [2022-11-02 21:07:47,955 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=457, PETRI_PLACES=217, PETRI_TRANSITIONS=211} [2022-11-02 21:07:47,956 INFO L287 CegarLoopForPetriNet]: 225 programPoint places, -8 predicate places. [2022-11-02 21:07:47,957 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 211 transitions, 457 flow [2022-11-02 21:07:47,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 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 21:07:47,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:47,958 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, 1, 1, 1, 1] [2022-11-02 21:07:47,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 21:07:47,958 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 21:07:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:47,959 INFO L85 PathProgramCache]: Analyzing trace with hash -894821271, now seen corresponding path program 1 times [2022-11-02 21:07:47,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:47,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786602085] [2022-11-02 21:07:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:47,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:48,247 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 21:07:48,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786602085] [2022-11-02 21:07:48,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786602085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:48,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:48,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:07:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770903651] [2022-11-02 21:07:48,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:48,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:07:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:48,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:07:48,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:07:48,254 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 236 [2022-11-02 21:07:48,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 211 transitions, 457 flow. Second operand has 6 states, 6 states have (on average 174.16666666666666) internal successors, (1045), 6 states have internal predecessors, (1045), 0 states have call successors, (0), 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 21:07:48,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:48,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 236 [2022-11-02 21:07:48,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand