./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8 --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 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 --- 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-2329fc7 [2022-12-13 14:44:43,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:44:43,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:44:43,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:44:43,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:44:43,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:44:43,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:44:43,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:44:43,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:44:43,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:44:43,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:44:43,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:44:43,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:44:43,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:44:43,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:44:43,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:44:43,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:44:43,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:44:43,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:44:43,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:44:43,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:44:43,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:44:43,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:44:43,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:44:43,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:44:43,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:44:43,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:44:43,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:44:43,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:44:43,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:44:43,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:44:43,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:44:43,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:44:43,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:44:43,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:44:43,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:44:43,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:44:43,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:44:43,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:44:43,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:44:43,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:44:43,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:44:43,896 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:44:43,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:44:43,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:44:43,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:44:43,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:44:43,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:44:43,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:44:43,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:44:43,898 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:44:43,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:44:43,899 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:44:43,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:44:43,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:44:43,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:44:43,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:44:43,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:44:43,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:44:43,900 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:44:43,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:44:43,901 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:44:43,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:44:43,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:44:43,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:44:43,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:44:43,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:44:43,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:44:43,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:44:43,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:44:43,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:44:43,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:44:43,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:44:43,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:44:43,903 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:44:43,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:44:43,903 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:44:43,904 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 [2022-12-13 14:44:44,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:44:44,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:44:44,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:44:44,107 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:44:44,108 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:44:44,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-12-13 14:44:46,661 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:44:46,814 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:44:46,814 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i [2022-12-13 14:44:46,824 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/data/7444a46ad/aee542971dda4dc98dfbbc097eed3dc0/FLAG4dd3e26de [2022-12-13 14:44:46,834 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/data/7444a46ad/aee542971dda4dc98dfbbc097eed3dc0 [2022-12-13 14:44:46,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:44:46,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:44:46,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:44:46,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:44:46,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:44:46,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:44:46" (1/1) ... [2022-12-13 14:44:46,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@598b2ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:46, skipping insertion in model container [2022-12-13 14:44:46,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:44:46" (1/1) ... [2022-12-13 14:44:46,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:44:46,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:44:47,068 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2022-12-13 14:44:47,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:44:47,093 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:44:47,117 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/sv-benchmarks/c/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2022-12-13 14:44:47,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:44:47,146 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:44:47,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47 WrapperNode [2022-12-13 14:44:47,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:44:47,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:44:47,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:44:47,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:44:47,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,178 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-12-13 14:44:47,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:44:47,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:44:47,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:44:47,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:44:47,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,197 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:44:47,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:44:47,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:44:47,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:44:47,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (1/1) ... [2022-12-13 14:44:47,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:44:47,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:44:47,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:44:47,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:44:47,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:44:47,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:44:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 14:44:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:44:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:44:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 14:44:47,259 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 14:44:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:44:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:44:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:44:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:44:47,261 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 14:44:47,378 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:44:47,379 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:44:47,559 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:44:47,567 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:44:47,567 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 14:44:47,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:47 BoogieIcfgContainer [2022-12-13 14:44:47,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:44:47,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:44:47,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:44:47,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:44:47,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:44:46" (1/3) ... [2022-12-13 14:44:47,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246ee1fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:44:47, skipping insertion in model container [2022-12-13 14:44:47,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:47" (2/3) ... [2022-12-13 14:44:47,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246ee1fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:44:47, skipping insertion in model container [2022-12-13 14:44:47,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:47" (3/3) ... [2022-12-13 14:44:47,579 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2022-12-13 14:44:47,588 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 14:44:47,596 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:44:47,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 14:44:47,597 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:44:47,641 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 14:44:47,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 123 transitions, 254 flow [2022-12-13 14:44:47,733 INFO L130 PetriNetUnfolder]: 17/161 cut-off events. [2022-12-13 14:44:47,733 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 14:44:47,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 161 events. 17/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 380 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2022-12-13 14:44:47,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 123 transitions, 254 flow [2022-12-13 14:44:47,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 118 transitions, 241 flow [2022-12-13 14:44:47,747 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:44:47,758 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 118 transitions, 241 flow [2022-12-13 14:44:47,760 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 118 transitions, 241 flow [2022-12-13 14:44:47,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 118 transitions, 241 flow [2022-12-13 14:44:47,794 INFO L130 PetriNetUnfolder]: 16/156 cut-off events. [2022-12-13 14:44:47,795 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:44:47,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 156 events. 16/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 365 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2022-12-13 14:44:47,798 INFO L119 LiptonReduction]: Number of co-enabled transitions 2904 [2022-12-13 14:44:49,873 INFO L134 LiptonReduction]: Checked pairs total: 4919 [2022-12-13 14:44:49,873 INFO L136 LiptonReduction]: Total number of compositions: 103 [2022-12-13 14:44:49,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:44:49,892 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;@10546945, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:44:49,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:44:49,895 INFO L130 PetriNetUnfolder]: 2/9 cut-off events. [2022-12-13 14:44:49,895 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:44:49,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:49,896 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:44:49,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:44:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash 14293223, now seen corresponding path program 1 times [2022-12-13 14:44:49,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:49,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649675576] [2022-12-13 14:44:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:49,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:44:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:44:50,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:44:50,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649675576] [2022-12-13 14:44:50,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649675576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:44:50,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:44:50,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:44:50,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816715393] [2022-12-13 14:44:50,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:44:50,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:44:50,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:44:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:44:50,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:44:50,095 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 226 [2022-12-13 14:44:50,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 33 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:50,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:44:50,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 226 [2022-12-13 14:44:50,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:44:50,173 INFO L130 PetriNetUnfolder]: 80/188 cut-off events. [2022-12-13 14:44:50,173 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:44:50,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 188 events. 80/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 634 event pairs, 63 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 361. Up to 169 conditions per place. [2022-12-13 14:44:50,176 INFO L137 encePairwiseOnDemand]: 213/226 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2022-12-13 14:44:50,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2022-12-13 14:44:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:44:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:44:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-12-13 14:44:50,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5353982300884956 [2022-12-13 14:44:50,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-12-13 14:44:50,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-12-13 14:44:50,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:44:50,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-12-13 14:44:50,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:50,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:50,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:50,203 INFO L175 Difference]: Start difference. First operand has 27 places, 33 transitions, 71 flow. Second operand 3 states and 363 transitions. [2022-12-13 14:44:50,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2022-12-13 14:44:50,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:44:50,207 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2022-12-13 14:44:50,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2022-12-13 14:44:50,211 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2022-12-13 14:44:50,211 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2022-12-13 14:44:50,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:50,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:50,212 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 14:44:50,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:44:50,212 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:44:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash 838772341, now seen corresponding path program 1 times [2022-12-13 14:44:50,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:50,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657505905] [2022-12-13 14:44:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:50,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:44:50,240 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:44:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:44:50,271 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:44:50,271 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:44:50,273 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 14:44:50,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 14:44:50,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:44:50,275 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 14:44:50,277 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:44:50,277 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 14:44:50,293 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:44:50,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 334 flow [2022-12-13 14:44:50,336 INFO L130 PetriNetUnfolder]: 31/259 cut-off events. [2022-12-13 14:44:50,336 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:44:50,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 31/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 786 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 163. Up to 8 conditions per place. [2022-12-13 14:44:50,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 158 transitions, 334 flow [2022-12-13 14:44:50,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 158 transitions, 334 flow [2022-12-13 14:44:50,339 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:44:50,339 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 158 transitions, 334 flow [2022-12-13 14:44:50,339 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 158 transitions, 334 flow [2022-12-13 14:44:50,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 334 flow [2022-12-13 14:44:50,359 INFO L130 PetriNetUnfolder]: 31/259 cut-off events. [2022-12-13 14:44:50,359 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:44:50,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 31/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 786 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 163. Up to 8 conditions per place. [2022-12-13 14:44:50,364 INFO L119 LiptonReduction]: Number of co-enabled transitions 8712 [2022-12-13 14:44:52,412 INFO L134 LiptonReduction]: Checked pairs total: 18508 [2022-12-13 14:44:52,413 INFO L136 LiptonReduction]: Total number of compositions: 124 [2022-12-13 14:44:52,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:44:52,416 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;@10546945, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:44:52,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:44:52,418 INFO L130 PetriNetUnfolder]: 2/9 cut-off events. [2022-12-13 14:44:52,418 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:44:52,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:52,418 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:44:52,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:44:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash 24080148, now seen corresponding path program 1 times [2022-12-13 14:44:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:52,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151005534] [2022-12-13 14:44:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:44:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:44:52,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:44:52,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151005534] [2022-12-13 14:44:52,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151005534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:44:52,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:44:52,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:44:52,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440411884] [2022-12-13 14:44:52,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:44:52,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:44:52,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:44:52,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:44:52,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:44:52,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 282 [2022-12-13 14:44:52,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:52,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:44:52,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 282 [2022-12-13 14:44:52,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:44:52,723 INFO L130 PetriNetUnfolder]: 1642/2949 cut-off events. [2022-12-13 14:44:52,723 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 14:44:52,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5703 conditions, 2949 events. 1642/2949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 17522 event pairs, 752 based on Foata normal form. 428/3078 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2022-12-13 14:44:52,733 INFO L137 encePairwiseOnDemand]: 264/282 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2022-12-13 14:44:52,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2022-12-13 14:44:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:44:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:44:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2022-12-13 14:44:52,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2022-12-13 14:44:52,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2022-12-13 14:44:52,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2022-12-13 14:44:52,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:44:52,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2022-12-13 14:44:52,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:52,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:52,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:52,742 INFO L175 Difference]: Start difference. First operand has 44 places, 56 transitions, 130 flow. Second operand 3 states and 460 transitions. [2022-12-13 14:44:52,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2022-12-13 14:44:52,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:44:52,743 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2022-12-13 14:44:52,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2022-12-13 14:44:52,744 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2022-12-13 14:44:52,744 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2022-12-13 14:44:52,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:52,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:52,745 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:44:52,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:44:52,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:44:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1739086522, now seen corresponding path program 1 times [2022-12-13 14:44:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:52,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125284714] [2022-12-13 14:44:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:52,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:44:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:44:52,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:44:52,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125284714] [2022-12-13 14:44:52,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125284714] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:44:52,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198284859] [2022-12-13 14:44:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:52,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:44:52,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:44:52,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:44:52,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:44:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:44:52,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:44:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:44:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:44:52,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:44:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:44:52,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198284859] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:44:52,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:44:52,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:44:52,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299814757] [2022-12-13 14:44:52,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:44:52,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:44:52,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:44:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:44:52,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:44:52,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 282 [2022-12-13 14:44:52,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:52,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:44:52,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 282 [2022-12-13 14:44:52,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:44:53,059 INFO L130 PetriNetUnfolder]: 376/769 cut-off events. [2022-12-13 14:44:53,059 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-12-13 14:44:53,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3935 event pairs, 0 based on Foata normal form. 90/858 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2022-12-13 14:44:53,062 INFO L137 encePairwiseOnDemand]: 279/282 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2022-12-13 14:44:53,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2022-12-13 14:44:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:44:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:44:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 705 transitions. [2022-12-13 14:44:53,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-13 14:44:53,064 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 705 transitions. [2022-12-13 14:44:53,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 705 transitions. [2022-12-13 14:44:53,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:44:53,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 705 transitions. [2022-12-13 14:44:53,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:53,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 282.0) internal successors, (1692), 6 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:53,068 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 282.0) internal successors, (1692), 6 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:53,069 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 5 states and 705 transitions. [2022-12-13 14:44:53,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2022-12-13 14:44:53,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:44:53,070 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-12-13 14:44:53,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 14:44:53,071 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2022-12-13 14:44:53,071 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-12-13 14:44:53,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:53,072 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:53,072 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 14:44:53,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:44:53,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:44:53,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:44:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:53,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1396137339, now seen corresponding path program 1 times [2022-12-13 14:44:53,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:53,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424883362] [2022-12-13 14:44:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:53,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:44:53,329 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:44:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:44:53,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:44:53,380 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:44:53,381 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 14:44:53,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 14:44:53,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:44:53,383 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 14:44:53,385 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:44:53,385 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 14:44:53,434 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 14:44:53,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 193 transitions, 416 flow [2022-12-13 14:44:53,482 INFO L130 PetriNetUnfolder]: 50/390 cut-off events. [2022-12-13 14:44:53,482 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 14:44:53,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 390 events. 50/390 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1339 event pairs, 1 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2022-12-13 14:44:53,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 193 transitions, 416 flow [2022-12-13 14:44:53,486 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 193 transitions, 416 flow [2022-12-13 14:44:53,486 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:44:53,486 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 193 transitions, 416 flow [2022-12-13 14:44:53,486 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 193 transitions, 416 flow [2022-12-13 14:44:53,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 193 transitions, 416 flow [2022-12-13 14:44:53,516 INFO L130 PetriNetUnfolder]: 50/390 cut-off events. [2022-12-13 14:44:53,516 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 14:44:53,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 390 events. 50/390 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1339 event pairs, 1 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2022-12-13 14:44:53,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 16632 [2022-12-13 14:44:55,623 INFO L134 LiptonReduction]: Checked pairs total: 35735 [2022-12-13 14:44:55,623 INFO L136 LiptonReduction]: Total number of compositions: 146 [2022-12-13 14:44:55,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:44:55,626 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;@10546945, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:44:55,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:44:55,628 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-12-13 14:44:55,628 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:44:55,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:55,628 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:44:55,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:44:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash 35591934, now seen corresponding path program 1 times [2022-12-13 14:44:55,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:55,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712554917] [2022-12-13 14:44:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:55,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:44:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:44:55,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:44:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712554917] [2022-12-13 14:44:55,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712554917] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:44:55,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:44:55,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:44:55,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454887146] [2022-12-13 14:44:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:44:55,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:44:55,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:44:55,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:44:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:44:55,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 339 [2022-12-13 14:44:55,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 75 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:55,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:44:55,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 339 [2022-12-13 14:44:55,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:44:58,714 INFO L130 PetriNetUnfolder]: 32280/46590 cut-off events. [2022-12-13 14:44:58,715 INFO L131 PetriNetUnfolder]: For 1317/1317 co-relation queries the response was YES. [2022-12-13 14:44:58,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92819 conditions, 46590 events. 32280/46590 cut-off events. For 1317/1317 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 303328 event pairs, 21006 based on Foata normal form. 5103/47961 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2022-12-13 14:44:58,853 INFO L137 encePairwiseOnDemand]: 315/339 looper letters, 44 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2022-12-13 14:44:58,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2022-12-13 14:44:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:44:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:44:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2022-12-13 14:44:58,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5506391347099312 [2022-12-13 14:44:58,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2022-12-13 14:44:58,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2022-12-13 14:44:58,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:44:58,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2022-12-13 14:44:58,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:58,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:58,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:58,864 INFO L175 Difference]: Start difference. First operand has 58 places, 75 transitions, 180 flow. Second operand 3 states and 560 transitions. [2022-12-13 14:44:58,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2022-12-13 14:44:58,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:44:58,869 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2022-12-13 14:44:58,869 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2022-12-13 14:44:58,870 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2022-12-13 14:44:58,871 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2022-12-13 14:44:58,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:58,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:58,871 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:44:58,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:44:58,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:44:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash 398581835, now seen corresponding path program 1 times [2022-12-13 14:44:58,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:58,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652041903] [2022-12-13 14:44:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:58,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:44:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:44:58,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:44:58,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652041903] [2022-12-13 14:44:58,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652041903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:44:58,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727201986] [2022-12-13 14:44:58,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:58,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:44:58,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:44:58,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:44:58,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:44:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:44:58,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:44:58,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:44:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:44:59,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:44:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:44:59,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727201986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:44:59,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:44:59,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:44:59,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910699666] [2022-12-13 14:44:59,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:44:59,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:44:59,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:44:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:44:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:44:59,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 339 [2022-12-13 14:44:59,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:59,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:44:59,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 339 [2022-12-13 14:44:59,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:44:59,882 INFO L130 PetriNetUnfolder]: 7582/12187 cut-off events. [2022-12-13 14:44:59,882 INFO L131 PetriNetUnfolder]: For 4374/4374 co-relation queries the response was YES. [2022-12-13 14:44:59,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 12187 events. 7582/12187 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 81236 event pairs, 0 based on Foata normal form. 1098/13285 useless extension candidates. Maximal degree in co-relation 3138. Up to 7322 conditions per place. [2022-12-13 14:44:59,936 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2022-12-13 14:44:59,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 411 flow [2022-12-13 14:44:59,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:44:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:44:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1042 transitions. [2022-12-13 14:44:59,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.512291052114061 [2022-12-13 14:44:59,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1042 transitions. [2022-12-13 14:44:59,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1042 transitions. [2022-12-13 14:44:59,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:44:59,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1042 transitions. [2022-12-13 14:44:59,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.66666666666666) internal successors, (1042), 6 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:59,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:59,945 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:59,945 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 1042 transitions. [2022-12-13 14:44:59,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 411 flow [2022-12-13 14:44:59,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 403 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 14:44:59,953 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-12-13 14:44:59,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 14:44:59,953 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2022-12-13 14:44:59,954 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-12-13 14:44:59,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:59,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:44:59,954 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 14:44:59,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:45:00,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:45:00,156 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:45:00,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:45:00,157 INFO L85 PathProgramCache]: Analyzing trace with hash -242374428, now seen corresponding path program 1 times [2022-12-13 14:45:00,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:45:00,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316608372] [2022-12-13 14:45:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:45:00,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:45:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:45:00,199 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:45:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:45:00,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:45:00,215 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:45:00,216 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 14:45:00,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 14:45:00,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 14:45:00,216 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 14:45:00,217 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:45:00,217 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 14:45:00,237 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 14:45:00,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 500 flow [2022-12-13 14:45:00,309 INFO L130 PetriNetUnfolder]: 81/589 cut-off events. [2022-12-13 14:45:00,309 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 14:45:00,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 589 events. 81/589 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2317 event pairs, 6 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 410. Up to 32 conditions per place. [2022-12-13 14:45:00,312 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 228 transitions, 500 flow [2022-12-13 14:45:00,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 228 transitions, 500 flow [2022-12-13 14:45:00,316 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:45:00,316 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 228 transitions, 500 flow [2022-12-13 14:45:00,316 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 228 transitions, 500 flow [2022-12-13 14:45:00,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 500 flow [2022-12-13 14:45:00,411 INFO L130 PetriNetUnfolder]: 81/589 cut-off events. [2022-12-13 14:45:00,411 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 14:45:00,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 589 events. 81/589 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2317 event pairs, 6 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 410. Up to 32 conditions per place. [2022-12-13 14:45:00,427 INFO L119 LiptonReduction]: Number of co-enabled transitions 26928 [2022-12-13 14:45:02,850 INFO L134 LiptonReduction]: Checked pairs total: 60172 [2022-12-13 14:45:02,850 INFO L136 LiptonReduction]: Total number of compositions: 164 [2022-12-13 14:45:02,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:45:02,852 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;@10546945, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:45:02,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:45:02,853 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-12-13 14:45:02,853 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:45:02,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:45:02,853 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:45:02,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:45:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:45:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash 48735647, now seen corresponding path program 1 times [2022-12-13 14:45:02,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:45:02,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930721532] [2022-12-13 14:45:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:45:02,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:45:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:45:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:45:02,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:45:02,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930721532] [2022-12-13 14:45:02,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930721532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:45:02,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:45:02,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:45:02,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745900924] [2022-12-13 14:45:02,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:45:02,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:45:02,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:45:02,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:45:02,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:45:02,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 392 [2022-12-13 14:45:02,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:02,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:45:02,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 392 [2022-12-13 14:45:02,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:45:33,267 INFO L130 PetriNetUnfolder]: 342314/466835 cut-off events. [2022-12-13 14:45:33,267 INFO L131 PetriNetUnfolder]: For 19147/19147 co-relation queries the response was YES. [2022-12-13 14:45:33,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923675 conditions, 466835 events. 342314/466835 cut-off events. For 19147/19147 co-relation queries the response was YES. Maximal size of possible extension queue 9087. Compared 3508911 event pairs, 330998 based on Foata normal form. 100924/533835 useless extension candidates. Maximal degree in co-relation 78468. Up to 446375 conditions per place. [2022-12-13 14:45:34,684 INFO L137 encePairwiseOnDemand]: 362/392 looper letters, 53 selfloop transitions, 2 changer transitions 11/78 dead transitions. [2022-12-13 14:45:34,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 328 flow [2022-12-13 14:45:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:45:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:45:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2022-12-13 14:45:34,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2022-12-13 14:45:34,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2022-12-13 14:45:34,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2022-12-13 14:45:34,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:45:34,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2022-12-13 14:45:34,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:34,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:34,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:34,689 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 232 flow. Second operand 3 states and 656 transitions. [2022-12-13 14:45:34,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 328 flow [2022-12-13 14:45:34,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:45:34,694 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 156 flow [2022-12-13 14:45:34,694 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2022-12-13 14:45:34,695 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2022-12-13 14:45:34,695 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 156 flow [2022-12-13 14:45:34,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:34,695 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:45:34,696 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:45:34,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 14:45:34,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:45:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:45:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2010600704, now seen corresponding path program 1 times [2022-12-13 14:45:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:45:34,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435593034] [2022-12-13 14:45:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:45:34,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:45:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:45:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:45:34,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:45:34,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435593034] [2022-12-13 14:45:34,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435593034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:45:34,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641084905] [2022-12-13 14:45:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:45:34,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:45:34,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:45:34,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:45:34,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:45:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:45:34,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:45:34,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:45:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:45:34,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:45:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:45:34,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641084905] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:45:34,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:45:34,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:45:34,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709275119] [2022-12-13 14:45:34,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:45:34,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:45:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:45:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:45:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:45:34,844 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 392 [2022-12-13 14:45:34,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 187.28571428571428) internal successors, (1311), 7 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:34,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:45:34,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 392 [2022-12-13 14:45:34,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:45:48,178 INFO L130 PetriNetUnfolder]: 173608/232873 cut-off events. [2022-12-13 14:45:48,178 INFO L131 PetriNetUnfolder]: For 20220/20220 co-relation queries the response was YES. [2022-12-13 14:45:48,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483874 conditions, 232873 events. 173608/232873 cut-off events. For 20220/20220 co-relation queries the response was YES. Maximal size of possible extension queue 5165. Compared 1629542 event pairs, 7200 based on Foata normal form. 1010/233883 useless extension candidates. Maximal degree in co-relation 49414. Up to 148321 conditions per place. [2022-12-13 14:45:49,159 INFO L137 encePairwiseOnDemand]: 388/392 looper letters, 132 selfloop transitions, 6 changer transitions 0/150 dead transitions. [2022-12-13 14:45:49,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 150 transitions, 622 flow [2022-12-13 14:45:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:45:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:45:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1251 transitions. [2022-12-13 14:45:49,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5318877551020408 [2022-12-13 14:45:49,163 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1251 transitions. [2022-12-13 14:45:49,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1251 transitions. [2022-12-13 14:45:49,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:45:49,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1251 transitions. [2022-12-13 14:45:49,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 208.5) internal successors, (1251), 6 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:49,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 392.0) internal successors, (2744), 7 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:49,169 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 392.0) internal successors, (2744), 7 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:49,169 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 156 flow. Second operand 6 states and 1251 transitions. [2022-12-13 14:45:49,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 150 transitions, 622 flow [2022-12-13 14:45:49,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 150 transitions, 608 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 14:45:49,181 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2022-12-13 14:45:49,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2022-12-13 14:45:49,182 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2022-12-13 14:45:49,182 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2022-12-13 14:45:49,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 187.28571428571428) internal successors, (1311), 7 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:49,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:45:49,182 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 14:45:49,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:45:49,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b9988a-316e-4f7a-8143-2ef8148ff753/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:45:49,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:45:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:45:49,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1323154614, now seen corresponding path program 1 times [2022-12-13 14:45:49,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:45:49,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691378773] [2022-12-13 14:45:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:45:49,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:45:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:45:49,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:45:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:45:49,421 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:45:49,421 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:45:49,421 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 14:45:49,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 14:45:49,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 14:45:49,422 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 14:45:49,422 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:45:49,422 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 14:45:49,444 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 14:45:49,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 263 transitions, 586 flow [2022-12-13 14:45:49,542 INFO L130 PetriNetUnfolder]: 140/928 cut-off events. [2022-12-13 14:45:49,542 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 14:45:49,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 928 events. 140/928 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4289 event pairs, 23 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 634. Up to 80 conditions per place. [2022-12-13 14:45:49,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 263 transitions, 586 flow [2022-12-13 14:45:49,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 263 transitions, 586 flow [2022-12-13 14:45:49,551 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:45:49,552 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 234 places, 263 transitions, 586 flow [2022-12-13 14:45:49,552 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 234 places, 263 transitions, 586 flow [2022-12-13 14:45:49,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 263 transitions, 586 flow [2022-12-13 14:45:49,642 INFO L130 PetriNetUnfolder]: 140/928 cut-off events. [2022-12-13 14:45:49,642 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 14:45:49,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 928 events. 140/928 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4289 event pairs, 23 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 634. Up to 80 conditions per place. [2022-12-13 14:45:49,671 INFO L119 LiptonReduction]: Number of co-enabled transitions 39600 [2022-12-13 14:45:52,279 INFO L134 LiptonReduction]: Checked pairs total: 101838 [2022-12-13 14:45:52,280 INFO L136 LiptonReduction]: Total number of compositions: 188 [2022-12-13 14:45:52,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:45:52,281 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;@10546945, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:45:52,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 14:45:52,282 INFO L130 PetriNetUnfolder]: 2/9 cut-off events. [2022-12-13 14:45:52,282 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:45:52,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:45:52,282 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 14:45:52,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:45:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:45:52,282 INFO L85 PathProgramCache]: Analyzing trace with hash 63693941, now seen corresponding path program 1 times [2022-12-13 14:45:52,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:45:52,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157764765] [2022-12-13 14:45:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:45:52,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:45:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:45:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:45:52,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:45:52,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157764765] [2022-12-13 14:45:52,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157764765] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:45:52,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:45:52,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:45:52,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523706685] [2022-12-13 14:45:52,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:45:52,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:45:52,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:45:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:45:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:45:52,308 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 451 [2022-12-13 14:45:52,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 113 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:52,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:45:52,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 451 [2022-12-13 14:45:52,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand