./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R --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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- 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-38b53e6 [2022-11-25 17:52:12,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:52:12,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:52:12,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:52:12,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:52:12,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:52:12,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:52:12,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:52:12,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:52:12,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:52:12,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:52:12,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:52:12,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:52:12,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:52:12,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:52:12,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:52:12,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:52:12,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:52:12,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:52:12,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:52:12,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:52:12,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:52:12,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:52:12,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:52:12,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:52:12,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:52:12,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:52:12,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:52:12,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:52:12,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:52:12,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:52:12,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:52:12,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:52:12,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:52:12,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:52:12,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:52:12,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:52:12,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:52:12,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:52:12,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:52:12,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:52:12,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:52:13,003 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:52:13,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:52:13,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:52:13,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:52:13,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:52:13,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:52:13,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:52:13,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:52:13,006 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:52:13,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:52:13,016 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:52:13,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:52:13,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:52:13,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:52:13,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:52:13,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:52:13,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:52:13,018 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:52:13,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:52:13,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:52:13,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:52:13,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:52:13,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:52:13,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:52:13,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:52:13,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:52:13,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:52:13,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:52:13,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:52:13,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:52:13,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:52:13,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:52:13,021 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:52:13,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:52:13,022 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_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2022-11-25 17:52:13,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:52:13,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:52:13,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:52:13,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:52:13,368 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:52:13,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/queue_ok_longer.i [2022-11-25 17:52:16,390 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:52:16,738 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:52:16,739 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/sv-benchmarks/c/pthread/queue_ok_longer.i [2022-11-25 17:52:16,759 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/data/624a6ab6f/c089e2662be540e1a01b91162bcd6595/FLAGad8c3876d [2022-11-25 17:52:16,779 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/data/624a6ab6f/c089e2662be540e1a01b91162bcd6595 [2022-11-25 17:52:16,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:52:16,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:52:16,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:52:16,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:52:16,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:52:16,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78600677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:16, skipping insertion in model container [2022-11-25 17:52:16,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:52:16" (1/1) ... [2022-11-25 17:52:16,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:52:16,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:52:17,547 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_c176eec2-5ab0-4e22-b00f-0d36654c523b/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2022-11-25 17:52:17,558 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_c176eec2-5ab0-4e22-b00f-0d36654c523b/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2022-11-25 17:52:17,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:52:17,586 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:52:17,674 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_c176eec2-5ab0-4e22-b00f-0d36654c523b/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2022-11-25 17:52:17,683 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_c176eec2-5ab0-4e22-b00f-0d36654c523b/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2022-11-25 17:52:17,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:52:17,782 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:52:17,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17 WrapperNode [2022-11-25 17:52:17,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:52:17,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:52:17,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:52:17,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:52:17,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,852 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 202 [2022-11-25 17:52:17,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:52:17,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:52:17,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:52:17,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:52:17,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,885 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:52:17,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:52:17,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:52:17,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:52:17,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (1/1) ... [2022-11-25 17:52:17,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:52:17,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:17,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:52:17,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:52:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 17:52:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 17:52:18,046 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 17:52:18,046 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 17:52:18,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:52:18,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:52:18,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:52:18,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:52:18,047 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:52:18,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:52:18,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:52:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:52:18,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:52:18,050 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:52:18,320 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:52:18,322 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:52:18,745 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:52:18,756 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:52:18,756 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:52:18,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:52:18 BoogieIcfgContainer [2022-11-25 17:52:18,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:52:18,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:52:18,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:52:18,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:52:18,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:52:16" (1/3) ... [2022-11-25 17:52:18,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e0d5e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:52:18, skipping insertion in model container [2022-11-25 17:52:18,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:17" (2/3) ... [2022-11-25 17:52:18,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e0d5e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:52:18, skipping insertion in model container [2022-11-25 17:52:18,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:52:18" (3/3) ... [2022-11-25 17:52:18,779 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2022-11-25 17:52:18,790 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:52:18,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:52:18,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 17:52:18,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:52:18,943 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:52:18,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 229 transitions, 474 flow [2022-11-25 17:52:19,115 INFO L130 PetriNetUnfolder]: 13/227 cut-off events. [2022-11-25 17:52:19,116 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:52:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 227 events. 13/227 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 367 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2022-11-25 17:52:19,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 229 transitions, 474 flow [2022-11-25 17:52:19,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 217 transitions, 443 flow [2022-11-25 17:52:19,136 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:52:19,168 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 217 transitions, 443 flow [2022-11-25 17:52:19,172 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 217 transitions, 443 flow [2022-11-25 17:52:19,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 217 transitions, 443 flow [2022-11-25 17:52:19,258 INFO L130 PetriNetUnfolder]: 13/217 cut-off events. [2022-11-25 17:52:19,258 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:52:19,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 217 events. 13/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 297 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2022-11-25 17:52:19,269 INFO L119 LiptonReduction]: Number of co-enabled transitions 10630 [2022-11-25 17:52:31,091 INFO L134 LiptonReduction]: Checked pairs total: 21255 [2022-11-25 17:52:31,092 INFO L136 LiptonReduction]: Total number of compositions: 209 [2022-11-25 17:52:31,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:52:31,120 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;@604b9ce8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:52:31,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 17:52:31,122 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 17:52:31,123 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:52:31,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:31,124 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:52:31,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:52:31,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:31,131 INFO L85 PathProgramCache]: Analyzing trace with hash 893, now seen corresponding path program 1 times [2022-11-25 17:52:31,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:31,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252143918] [2022-11-25 17:52:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:31,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:31,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:31,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252143918] [2022-11-25 17:52:31,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252143918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:31,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:31,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:52:31,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106454467] [2022-11-25 17:52:31,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:31,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:52:31,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:31,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:52:31,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:52:31,341 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 438 [2022-11-25 17:52:31,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 103 flow. Second operand has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:31,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:31,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 438 [2022-11-25 17:52:31,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:31,693 INFO L130 PetriNetUnfolder]: 892/1443 cut-off events. [2022-11-25 17:52:31,693 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-25 17:52:31,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2906 conditions, 1443 events. 892/1443 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6169 event pairs, 711 based on Foata normal form. 0/1173 useless extension candidates. Maximal degree in co-relation 2735. Up to 1413 conditions per place. [2022-11-25 17:52:31,710 INFO L137 encePairwiseOnDemand]: 437/438 looper letters, 41 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2022-11-25 17:52:31,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 183 flow [2022-11-25 17:52:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:52:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:52:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 478 transitions. [2022-11-25 17:52:31,738 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.545662100456621 [2022-11-25 17:52:31,739 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 478 transitions. [2022-11-25 17:52:31,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 478 transitions. [2022-11-25 17:52:31,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:31,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 478 transitions. [2022-11-25 17:52:31,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 239.0) internal successors, (478), 2 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:31,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:31,760 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:31,761 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 103 flow. Second operand 2 states and 478 transitions. [2022-11-25 17:52:31,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 183 flow [2022-11-25 17:52:31,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:52:31,769 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 96 flow [2022-11-25 17:52:31,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2022-11-25 17:52:31,776 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2022-11-25 17:52:31,776 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 96 flow [2022-11-25 17:52:31,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:31,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:31,777 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:31,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:52:31,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:52:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:31,778 INFO L85 PathProgramCache]: Analyzing trace with hash 144959475, now seen corresponding path program 1 times [2022-11-25 17:52:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:31,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353584649] [2022-11-25 17:52:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:32,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:32,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353584649] [2022-11-25 17:52:32,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353584649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:32,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:32,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:52:32,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641654524] [2022-11-25 17:52:32,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:32,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:32,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:32,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:32,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:52:32,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 438 [2022-11-25 17:52:32,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:32,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 438 [2022-11-25 17:52:32,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:32,399 INFO L130 PetriNetUnfolder]: 313/590 cut-off events. [2022-11-25 17:52:32,399 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 17:52:32,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 590 events. 313/590 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2562 event pairs, 215 based on Foata normal form. 30/518 useless extension candidates. Maximal degree in co-relation 1189. Up to 346 conditions per place. [2022-11-25 17:52:32,402 INFO L137 encePairwiseOnDemand]: 434/438 looper letters, 40 selfloop transitions, 2 changer transitions 11/55 dead transitions. [2022-11-25 17:52:32,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 219 flow [2022-11-25 17:52:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2022-11-25 17:52:32,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.525875190258752 [2022-11-25 17:52:32,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2022-11-25 17:52:32,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2022-11-25 17:52:32,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:32,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2022-11-25 17:52:32,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,415 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 96 flow. Second operand 3 states and 691 transitions. [2022-11-25 17:52:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 219 flow [2022-11-25 17:52:32,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 219 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:52:32,418 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 92 flow [2022-11-25 17:52:32,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2022-11-25 17:52:32,419 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2022-11-25 17:52:32,419 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 92 flow [2022-11-25 17:52:32,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,420 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:32,420 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:32,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:52:32,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:52:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1395804036, now seen corresponding path program 1 times [2022-11-25 17:52:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920012832] [2022-11-25 17:52:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:32,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:32,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920012832] [2022-11-25 17:52:32,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920012832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:32,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:32,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:52:32,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636496401] [2022-11-25 17:52:32,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:32,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:32,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:32,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:32,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:52:32,536 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 438 [2022-11-25 17:52:32,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:32,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 438 [2022-11-25 17:52:32,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:32,715 INFO L130 PetriNetUnfolder]: 237/470 cut-off events. [2022-11-25 17:52:32,715 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 17:52:32,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 470 events. 237/470 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1638 event pairs, 147 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 980. Up to 339 conditions per place. [2022-11-25 17:52:32,720 INFO L137 encePairwiseOnDemand]: 434/438 looper letters, 48 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2022-11-25 17:52:32,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 224 flow [2022-11-25 17:52:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 694 transitions. [2022-11-25 17:52:32,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.528158295281583 [2022-11-25 17:52:32,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 694 transitions. [2022-11-25 17:52:32,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 694 transitions. [2022-11-25 17:52:32,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:32,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 694 transitions. [2022-11-25 17:52:32,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,732 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 92 flow. Second operand 3 states and 694 transitions. [2022-11-25 17:52:32,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 224 flow [2022-11-25 17:52:32,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:52:32,735 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 107 flow [2022-11-25 17:52:32,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2022-11-25 17:52:32,737 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2022-11-25 17:52:32,737 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 107 flow [2022-11-25 17:52:32,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:32,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:32,738 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:32,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:52:32,739 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:52:32,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:32,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1733500058, now seen corresponding path program 1 times [2022-11-25 17:52:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:32,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146600907] [2022-11-25 17:52:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:32,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:33,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146600907] [2022-11-25 17:52:33,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146600907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:33,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:33,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:52:33,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042184950] [2022-11-25 17:52:33,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:33,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:33,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:33,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:33,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:52:33,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 438 [2022-11-25 17:52:33,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:33,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 438 [2022-11-25 17:52:33,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:33,209 INFO L130 PetriNetUnfolder]: 175/362 cut-off events. [2022-11-25 17:52:33,209 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-25 17:52:33,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 362 events. 175/362 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1094 event pairs, 6 based on Foata normal form. 42/378 useless extension candidates. Maximal degree in co-relation 801. Up to 329 conditions per place. [2022-11-25 17:52:33,216 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 43 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2022-11-25 17:52:33,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 214 flow [2022-11-25 17:52:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-11-25 17:52:33,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5190258751902588 [2022-11-25 17:52:33,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-11-25 17:52:33,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-11-25 17:52:33,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:33,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-11-25 17:52:33,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,231 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 107 flow. Second operand 3 states and 682 transitions. [2022-11-25 17:52:33,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 214 flow [2022-11-25 17:52:33,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 48 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:33,235 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 110 flow [2022-11-25 17:52:33,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=3, PETRI_FLOW=110, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2022-11-25 17:52:33,237 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2022-11-25 17:52:33,237 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 110 flow [2022-11-25 17:52:33,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:33,239 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:33,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:52:33,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:52:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1047028430, now seen corresponding path program 1 times [2022-11-25 17:52:33,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:33,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762454160] [2022-11-25 17:52:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:33,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:33,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762454160] [2022-11-25 17:52:33,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762454160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:33,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111112580] [2022-11-25 17:52:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:33,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:33,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:33,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:33,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:52:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:33,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:52:33,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:33,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:33,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111112580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:33,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:33,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 17:52:33,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988172483] [2022-11-25 17:52:33,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:33,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:33,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:33,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:33,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:52:33,671 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 438 [2022-11-25 17:52:33,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 218.57142857142858) internal successors, (1530), 7 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:33,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 438 [2022-11-25 17:52:33,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:33,914 INFO L130 PetriNetUnfolder]: 237/508 cut-off events. [2022-11-25 17:52:33,914 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-25 17:52:33,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 508 events. 237/508 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1363 event pairs, 91 based on Foata normal form. 12/486 useless extension candidates. Maximal degree in co-relation 1141. Up to 217 conditions per place. [2022-11-25 17:52:33,918 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 70 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2022-11-25 17:52:33,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 83 transitions, 368 flow [2022-11-25 17:52:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:52:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:52:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1361 transitions. [2022-11-25 17:52:33,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5178843226788432 [2022-11-25 17:52:33,923 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1361 transitions. [2022-11-25 17:52:33,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1361 transitions. [2022-11-25 17:52:33,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:33,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1361 transitions. [2022-11-25 17:52:33,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.83333333333334) internal successors, (1361), 6 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,936 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,936 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 110 flow. Second operand 6 states and 1361 transitions. [2022-11-25 17:52:33,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 83 transitions, 368 flow [2022-11-25 17:52:33,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 83 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:33,940 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 170 flow [2022-11-25 17:52:33,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2022-11-25 17:52:33,943 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 6 predicate places. [2022-11-25 17:52:33,945 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 170 flow [2022-11-25 17:52:33,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 218.57142857142858) internal successors, (1530), 7 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:33,947 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:33,947 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:33,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:34,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:34,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:52:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1401161494, now seen corresponding path program 2 times [2022-11-25 17:52:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:34,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069123616] [2022-11-25 17:52:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:34,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:34,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069123616] [2022-11-25 17:52:34,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069123616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:34,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058187999] [2022-11-25 17:52:34,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:52:34,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:34,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:34,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:34,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:52:34,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:52:34,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:52:34,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:34,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:34,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058187999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:34,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:34,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-25 17:52:34,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532103983] [2022-11-25 17:52:34,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:34,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:52:34,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:52:34,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:52:34,976 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 438 [2022-11-25 17:52:34,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 170 flow. Second operand has 13 states, 13 states have (on average 218.84615384615384) internal successors, (2845), 13 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:34,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:34,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 438 [2022-11-25 17:52:34,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:35,567 INFO L130 PetriNetUnfolder]: 423/934 cut-off events. [2022-11-25 17:52:35,567 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2022-11-25 17:52:35,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2367 conditions, 934 events. 423/934 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2561 event pairs, 91 based on Foata normal form. 24/900 useless extension candidates. Maximal degree in co-relation 2357. Up to 217 conditions per place. [2022-11-25 17:52:35,574 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 136 selfloop transitions, 22 changer transitions 0/161 dead transitions. [2022-11-25 17:52:35,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 161 transitions, 836 flow [2022-11-25 17:52:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:52:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:52:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2720 transitions. [2022-11-25 17:52:35,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.517503805175038 [2022-11-25 17:52:35,584 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2720 transitions. [2022-11-25 17:52:35,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2720 transitions. [2022-11-25 17:52:35,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:35,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2720 transitions. [2022-11-25 17:52:35,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 226.66666666666666) internal successors, (2720), 12 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:35,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:35,612 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 438.0) internal successors, (5694), 13 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:35,612 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 170 flow. Second operand 12 states and 2720 transitions. [2022-11-25 17:52:35,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 161 transitions, 836 flow [2022-11-25 17:52:35,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 161 transitions, 797 flow, removed 18 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:35,626 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 320 flow [2022-11-25 17:52:35,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=320, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2022-11-25 17:52:35,632 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 23 predicate places. [2022-11-25 17:52:35,632 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 320 flow [2022-11-25 17:52:35,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 218.84615384615384) internal successors, (2845), 13 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:35,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:35,635 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:35,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:35,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:35,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:52:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash 551793046, now seen corresponding path program 3 times [2022-11-25 17:52:35,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:35,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069006826] [2022-11-25 17:52:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:36,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:36,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069006826] [2022-11-25 17:52:36,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069006826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:36,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399352194] [2022-11-25 17:52:36,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:52:36,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:36,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:36,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:36,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:52:37,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:52:37,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:37,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-25 17:52:37,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:38,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:52:38,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:38,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:52:38,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:52:38,254 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-25 17:52:38,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-25 17:52:38,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:38,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:52:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-25 17:52:38,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:38,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399352194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:38,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:38,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 18 [2022-11-25 17:52:38,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243883430] [2022-11-25 17:52:38,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:38,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:38,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:38,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:52:38,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 438 [2022-11-25 17:52:38,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 320 flow. Second operand has 7 states, 7 states have (on average 207.57142857142858) internal successors, (1453), 7 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:38,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:38,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 438 [2022-11-25 17:52:38,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:39,281 INFO L130 PetriNetUnfolder]: 725/1582 cut-off events. [2022-11-25 17:52:39,281 INFO L131 PetriNetUnfolder]: For 980/980 co-relation queries the response was YES. [2022-11-25 17:52:39,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4252 conditions, 1582 events. 725/1582 cut-off events. For 980/980 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5517 event pairs, 159 based on Foata normal form. 0/1518 useless extension candidates. Maximal degree in co-relation 4235. Up to 992 conditions per place. [2022-11-25 17:52:39,294 INFO L137 encePairwiseOnDemand]: 430/438 looper letters, 89 selfloop transitions, 11 changer transitions 1/103 dead transitions. [2022-11-25 17:52:39,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 103 transitions, 730 flow [2022-11-25 17:52:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:52:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:52:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1283 transitions. [2022-11-25 17:52:39,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4882039573820396 [2022-11-25 17:52:39,300 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1283 transitions. [2022-11-25 17:52:39,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1283 transitions. [2022-11-25 17:52:39,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:39,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1283 transitions. [2022-11-25 17:52:39,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.83333333333334) internal successors, (1283), 6 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:39,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:39,312 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 438.0) internal successors, (3066), 7 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:39,312 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 320 flow. Second operand 6 states and 1283 transitions. [2022-11-25 17:52:39,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 103 transitions, 730 flow [2022-11-25 17:52:39,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 103 transitions, 714 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:52:39,321 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 398 flow [2022-11-25 17:52:39,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2022-11-25 17:52:39,323 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 27 predicate places. [2022-11-25 17:52:39,323 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 398 flow [2022-11-25 17:52:39,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 207.57142857142858) internal successors, (1453), 7 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:39,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:39,324 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:39,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:39,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:52:39,533 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:52:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:39,534 INFO L85 PathProgramCache]: Analyzing trace with hash -974370010, now seen corresponding path program 1 times [2022-11-25 17:52:39,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:39,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574125342] [2022-11-25 17:52:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:39,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:40,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:40,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574125342] [2022-11-25 17:52:40,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574125342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:40,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144207112] [2022-11-25 17:52:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:40,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:40,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:40,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:40,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:52:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:40,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:52:40,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:40,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:41,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144207112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:41,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:41,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-25 17:52:41,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405029059] [2022-11-25 17:52:41,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:41,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:52:41,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:41,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:52:41,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:52:41,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 438 [2022-11-25 17:52:41,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 398 flow. Second operand has 25 states, 25 states have (on average 219.28) internal successors, (5482), 25 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:41,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:41,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 438 [2022-11-25 17:52:41,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:42,785 INFO L130 PetriNetUnfolder]: 1280/2989 cut-off events. [2022-11-25 17:52:42,785 INFO L131 PetriNetUnfolder]: For 5682/5682 co-relation queries the response was YES. [2022-11-25 17:52:42,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9768 conditions, 2989 events. 1280/2989 cut-off events. For 5682/5682 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10785 event pairs, 137 based on Foata normal form. 96/3061 useless extension candidates. Maximal degree in co-relation 9748. Up to 748 conditions per place. [2022-11-25 17:52:42,812 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 376 selfloop transitions, 47 changer transitions 0/426 dead transitions. [2022-11-25 17:52:42,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 426 transitions, 3111 flow [2022-11-25 17:52:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:52:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:52:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5438 transitions. [2022-11-25 17:52:42,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5173135464231354 [2022-11-25 17:52:42,827 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5438 transitions. [2022-11-25 17:52:42,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5438 transitions. [2022-11-25 17:52:42,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:42,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5438 transitions. [2022-11-25 17:52:42,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 226.58333333333334) internal successors, (5438), 24 states have internal predecessors, (5438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:42,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 438.0) internal successors, (10950), 25 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:42,885 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 438.0) internal successors, (10950), 25 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:42,885 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 398 flow. Second operand 24 states and 5438 transitions. [2022-11-25 17:52:42,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 426 transitions, 3111 flow [2022-11-25 17:52:42,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 426 transitions, 3110 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:42,909 INFO L231 Difference]: Finished difference. Result has 109 places, 95 transitions, 840 flow [2022-11-25 17:52:42,909 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=840, PETRI_PLACES=109, PETRI_TRANSITIONS=95} [2022-11-25 17:52:42,911 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 62 predicate places. [2022-11-25 17:52:42,912 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 95 transitions, 840 flow [2022-11-25 17:52:42,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 219.28) internal successors, (5482), 25 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:42,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:42,914 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 12, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:42,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:43,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:43,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:52:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:43,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2130854640, now seen corresponding path program 2 times [2022-11-25 17:52:43,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:43,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562019892] [2022-11-25 17:52:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:43,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:44,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:44,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562019892] [2022-11-25 17:52:44,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562019892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:44,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141809202] [2022-11-25 17:52:44,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:52:44,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:44,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:44,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:44,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:52:45,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:52:45,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:45,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:52:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:45,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:46,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141809202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:46,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:46,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-25 17:52:46,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461897061] [2022-11-25 17:52:46,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:46,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 17:52:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 17:52:46,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:52:47,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 438 [2022-11-25 17:52:47,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 95 transitions, 840 flow. Second operand has 49 states, 49 states have (on average 219.40816326530611) internal successors, (10751), 49 states have internal predecessors, (10751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:47,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:47,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 438 [2022-11-25 17:52:47,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:50,792 INFO L130 PetriNetUnfolder]: 2504/5917 cut-off events. [2022-11-25 17:52:50,792 INFO L131 PetriNetUnfolder]: For 44479/44479 co-relation queries the response was YES. [2022-11-25 17:52:50,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21314 conditions, 5917 events. 2504/5917 cut-off events. For 44479/44479 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 21533 event pairs, 137 based on Foata normal form. 192/6085 useless extension candidates. Maximal degree in co-relation 21282. Up to 1564 conditions per place. [2022-11-25 17:52:50,861 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 760 selfloop transitions, 95 changer transitions 0/858 dead transitions. [2022-11-25 17:52:50,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 858 transitions, 7027 flow [2022-11-25 17:52:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:52:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 17:52:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 10874 transitions. [2022-11-25 17:52:50,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5172184170471842 [2022-11-25 17:52:50,885 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 10874 transitions. [2022-11-25 17:52:50,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 10874 transitions. [2022-11-25 17:52:50,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:50,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 10874 transitions. [2022-11-25 17:52:50,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 226.54166666666666) internal successors, (10874), 48 states have internal predecessors, (10874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:51,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 438.0) internal successors, (21462), 49 states have internal predecessors, (21462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:51,015 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 438.0) internal successors, (21462), 49 states have internal predecessors, (21462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:51,015 INFO L175 Difference]: Start difference. First operand has 109 places, 95 transitions, 840 flow. Second operand 48 states and 10874 transitions. [2022-11-25 17:52:51,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 858 transitions, 7027 flow [2022-11-25 17:52:51,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 858 transitions, 6992 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-25 17:52:51,092 INFO L231 Difference]: Finished difference. Result has 172 places, 145 transitions, 1856 flow [2022-11-25 17:52:51,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1856, PETRI_PLACES=172, PETRI_TRANSITIONS=145} [2022-11-25 17:52:51,093 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 125 predicate places. [2022-11-25 17:52:51,093 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 145 transitions, 1856 flow [2022-11-25 17:52:51,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 219.40816326530611) internal successors, (10751), 49 states have internal predecessors, (10751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:51,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:51,097 INFO L209 CegarLoopForPetriNet]: trace histogram [46, 46, 46, 46, 24, 24, 24, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:51,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:51,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:51,306 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:52:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:51,307 INFO L85 PathProgramCache]: Analyzing trace with hash 324224208, now seen corresponding path program 3 times [2022-11-25 17:52:51,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:51,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996670254] [2022-11-25 17:52:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:51,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6466 backedges. 0 proven. 6466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:56,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:56,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996670254] [2022-11-25 17:52:56,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996670254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:56,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725393891] [2022-11-25 17:52:56,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:52:56,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:56,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:56,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:56,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:52:58,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 17:52:58,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-25 17:52:58,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:59,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:52:59,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:59,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:52:59,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:52:59,894 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-25 17:52:59,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-25 17:52:59,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:52:59,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:53:00,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-11-25 17:53:00,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:00,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:53:00,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:53:00,248 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-25 17:53:00,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 27 [2022-11-25 17:53:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:00,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:53:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6466 backedges. 591 proven. 225 refuted. 0 times theorem prover too weak. 5650 trivial. 0 not checked. [2022-11-25 17:53:00,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:00,753 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2063 Int) (v_ArrVal_2066 Int) (v_ArrVal_2065 (Array Int Int))) (or (< (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604) v_ArrVal_2063)) |c_~#stored_elements~0.base| v_ArrVal_2065) |c_~#queue~0.base|))) (store .cse0 (+ |c_~#queue~0.offset| (* (select .cse0 .cse1) 4)) v_ArrVal_2066)) .cse1)) 400) (not (<= v_ArrVal_2063 (+ |c_t1Thread1of1ForFork0_enqueue_#t~mem40#1| 1))))) is different from false [2022-11-25 17:53:01,108 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2063 Int) (v_ArrVal_2066 Int) (v_ArrVal_2065 (Array Int Int)) (v_ArrVal_2061 Int)) (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (or (< (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse2 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2061) .cse3 v_ArrVal_2063)) |c_~#stored_elements~0.base| v_ArrVal_2065) |c_~#queue~0.base|))) (store .cse0 (+ (* (select .cse0 .cse1) 4) |c_~#queue~0.offset|) v_ArrVal_2066)) .cse1)) 400) (< (+ (select .cse2 .cse3) 1) v_ArrVal_2063)))) is different from false [2022-11-25 17:53:01,149 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2063 Int) (v_ArrVal_2066 Int) (v_ArrVal_2059 Int) (v_ArrVal_2065 (Array Int Int)) (v_ArrVal_2061 Int)) (let ((.cse2 (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ (* |c_t1Thread1of1ForFork0_enqueue_#t~mem36#1| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2059)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (or (< (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse2 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2061) .cse3 v_ArrVal_2063)) |c_~#stored_elements~0.base| v_ArrVal_2065) |c_~#queue~0.base|))) (store .cse0 (+ (* 4 (select .cse0 .cse1)) |c_~#queue~0.offset|) v_ArrVal_2066)) .cse1)) 400) (< (+ (select .cse2 .cse3) 1) v_ArrVal_2063)))) is different from false [2022-11-25 17:53:05,418 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2063 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_174| Int) (v_ArrVal_2066 Int) (v_ArrVal_2058 (Array Int Int)) (v_ArrVal_2059 Int) (v_ArrVal_2065 (Array Int Int)) (v_ArrVal_2061 Int)) (let ((.cse3 (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_2058))) (let ((.cse0 (select .cse3 |c_~#queue~0.base|))) (let ((.cse4 (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_174| 4)) v_ArrVal_2059)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (or (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_174| (select .cse0 .cse1))) (< (select (let ((.cse2 (select (store (store .cse3 |c_~#queue~0.base| (store (store .cse4 (+ 1608 |c_~#queue~0.offset|) v_ArrVal_2061) .cse1 v_ArrVal_2063)) |c_~#stored_elements~0.base| v_ArrVal_2065) |c_~#queue~0.base|))) (store .cse2 (+ |c_~#queue~0.offset| (* (select .cse2 .cse1) 4)) v_ArrVal_2066)) .cse1) 400) (< (+ (select .cse4 .cse1) 1) v_ArrVal_2063)))))) is different from false [2022-11-25 17:53:05,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:05,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 129 [2022-11-25 17:53:05,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:05,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 211 [2022-11-25 17:53:05,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 103 [2022-11-25 17:53:05,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 121 [2022-11-25 17:53:05,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-25 17:53:05,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:05,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-11-25 17:53:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6466 backedges. 307 proven. 223 refuted. 108 times theorem prover too weak. 5650 trivial. 178 not checked. [2022-11-25 17:53:10,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725393891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:10,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:10,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 11, 13] total 71 [2022-11-25 17:53:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78965256] [2022-11-25 17:53:10,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:10,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-25 17:53:10,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-25 17:53:10,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1294, Invalid=3124, Unknown=20, NotChecked=532, Total=4970 [2022-11-25 17:53:10,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 438 [2022-11-25 17:53:10,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 145 transitions, 1856 flow. Second operand has 71 states, 71 states have (on average 168.16901408450704) internal successors, (11940), 71 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:10,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:10,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 438 [2022-11-25 17:53:10,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:50,180 INFO L130 PetriNetUnfolder]: 5185/11808 cut-off events. [2022-11-25 17:54:50,180 INFO L131 PetriNetUnfolder]: For 53139/53139 co-relation queries the response was YES. [2022-11-25 17:54:50,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44492 conditions, 11808 events. 5185/11808 cut-off events. For 53139/53139 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 54019 event pairs, 113 based on Foata normal form. 378/12150 useless extension candidates. Maximal degree in co-relation 44435. Up to 3167 conditions per place. [2022-11-25 17:54:50,321 INFO L137 encePairwiseOnDemand]: 423/438 looper letters, 1712 selfloop transitions, 1302 changer transitions 1/3017 dead transitions. [2022-11-25 17:54:50,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 3017 transitions, 22015 flow [2022-11-25 17:54:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 432 states. [2022-11-25 17:54:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2022-11-25 17:54:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 73096 transitions. [2022-11-25 17:54:50,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3863098258075427 [2022-11-25 17:54:50,412 INFO L72 ComplementDD]: Start complementDD. Operand 432 states and 73096 transitions. [2022-11-25 17:54:50,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 73096 transitions. [2022-11-25 17:54:50,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:50,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 432 states and 73096 transitions. [2022-11-25 17:54:50,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 433 states, 432 states have (on average 169.2037037037037) internal successors, (73096), 432 states have internal predecessors, (73096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:50,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 433 states, 433 states have (on average 438.0) internal successors, (189654), 433 states have internal predecessors, (189654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:50,770 INFO L81 ComplementDD]: Finished complementDD. Result has 433 states, 433 states have (on average 438.0) internal successors, (189654), 433 states have internal predecessors, (189654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:50,770 INFO L175 Difference]: Start difference. First operand has 172 places, 145 transitions, 1856 flow. Second operand 432 states and 73096 transitions. [2022-11-25 17:54:50,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 3017 transitions, 22015 flow [2022-11-25 17:54:51,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 3017 transitions, 21816 flow, removed 0 selfloop flow, removed 21 redundant places. [2022-11-25 17:54:51,226 INFO L231 Difference]: Finished difference. Result has 769 places, 1528 transitions, 16588 flow [2022-11-25 17:54:51,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=432, PETRI_FLOW=16588, PETRI_PLACES=769, PETRI_TRANSITIONS=1528} [2022-11-25 17:54:51,229 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 722 predicate places. [2022-11-25 17:54:51,229 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 1528 transitions, 16588 flow [2022-11-25 17:54:51,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 168.16901408450704) internal successors, (11940), 71 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:51,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:51,232 INFO L209 CegarLoopForPetriNet]: trace histogram [47, 47, 47, 47, 34, 34, 34, 34, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:51,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:51,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:54:51,442 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:54:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1543629008, now seen corresponding path program 4 times [2022-11-25 17:54:51,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:51,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493514100] [2022-11-25 17:54:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:51,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:55,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493514100] [2022-11-25 17:54:55,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493514100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409529720] [2022-11-25 17:54:55,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:54:55,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:55,653 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:55,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:54:56,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:54:56,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:56,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 2610 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 17:54:56,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:54:57,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:00,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409529720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:00,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:00,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-11-25 17:55:00,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732955643] [2022-11-25 17:55:00,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:00,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-25 17:55:00,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:00,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-25 17:55:00,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 17:55:01,423 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 438 [2022-11-25 17:55:01,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 1528 transitions, 16588 flow. Second operand has 99 states, 99 states have (on average 219.68686868686868) internal successors, (21749), 99 states have internal predecessors, (21749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:01,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:01,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 438 [2022-11-25 17:55:01,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:38,177 INFO L130 PetriNetUnfolder]: 9157/22372 cut-off events. [2022-11-25 17:55:38,178 INFO L131 PetriNetUnfolder]: For 11877496/11877496 co-relation queries the response was YES. [2022-11-25 17:55:38,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469283 conditions, 22372 events. 9157/22372 cut-off events. For 11877496/11877496 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 106069 event pairs, 163 based on Foata normal form. 784/23120 useless extension candidates. Maximal degree in co-relation 469038. Up to 6220 conditions per place. [2022-11-25 17:55:39,042 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 3159 selfloop transitions, 482 changer transitions 0/3644 dead transitions. [2022-11-25 17:55:39,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 3644 transitions, 96189 flow [2022-11-25 17:55:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-25 17:55:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-11-25 17:55:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 22199 transitions. [2022-11-25 17:55:39,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5171698816512906 [2022-11-25 17:55:39,075 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 22199 transitions. [2022-11-25 17:55:39,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 22199 transitions. [2022-11-25 17:55:39,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:39,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 22199 transitions. [2022-11-25 17:55:39,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 226.5204081632653) internal successors, (22199), 98 states have internal predecessors, (22199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:39,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 438.0) internal successors, (43362), 99 states have internal predecessors, (43362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:39,176 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 438.0) internal successors, (43362), 99 states have internal predecessors, (43362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:39,176 INFO L175 Difference]: Start difference. First operand has 769 places, 1528 transitions, 16588 flow. Second operand 98 states and 22199 transitions. [2022-11-25 17:55:39,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 3644 transitions, 96189 flow [2022-11-25 17:55:52,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 811 places, 3644 transitions, 87412 flow, removed 1979 selfloop flow, removed 55 redundant places. [2022-11-25 17:55:52,752 INFO L231 Difference]: Finished difference. Result has 861 places, 1772 transitions, 17699 flow [2022-11-25 17:55:52,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=12214, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=17699, PETRI_PLACES=861, PETRI_TRANSITIONS=1772} [2022-11-25 17:55:52,753 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 814 predicate places. [2022-11-25 17:55:52,753 INFO L495 AbstractCegarLoop]: Abstraction has has 861 places, 1772 transitions, 17699 flow [2022-11-25 17:55:52,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 219.68686868686868) internal successors, (21749), 99 states have internal predecessors, (21749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:52,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:52,756 INFO L209 CegarLoopForPetriNet]: trace histogram [96, 96, 96, 96, 71, 71, 71, 71, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:52,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:52,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:55:52,956 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 17:55:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:52,957 INFO L85 PathProgramCache]: Analyzing trace with hash -545696097, now seen corresponding path program 5 times [2022-11-25 17:55:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:52,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332411702] [2022-11-25 17:55:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30951 backedges. 0 proven. 30951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:06,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:06,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332411702] [2022-11-25 17:56:06,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332411702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:56:06,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175305089] [2022-11-25 17:56:06,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:56:06,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:56:06,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:56:06,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:56:06,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c176eec2-5ab0-4e22-b00f-0d36654c523b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:56:12,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-25 17:56:12,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:56:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 204 conjunts are in the unsatisfiable core [2022-11-25 17:56:12,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:56:12,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:56:12,367 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-25 17:56:12,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 39 [2022-11-25 17:56:12,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:56:12,682 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 17:56:12,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 51 [2022-11-25 17:56:12,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:12,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2022-11-25 17:56:13,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 33 [2022-11-25 17:56:13,476 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-25 17:56:13,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 57 [2022-11-25 17:56:13,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:56:13,942 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:56:13,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 66 [2022-11-25 17:56:14,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:14,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-25 17:56:14,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 48 [2022-11-25 17:56:14,716 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-25 17:56:14,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 72 [2022-11-25 17:56:15,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:56:15,186 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:56:15,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 79 [2022-11-25 17:56:15,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:15,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 62 [2022-11-25 17:56:15,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 59 [2022-11-25 17:56:16,095 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-25 17:56:16,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 82 [2022-11-25 17:56:16,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:56:16,507 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 17:56:16,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2022-11-25 17:56:16,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:16,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-11-25 17:56:16,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-25 17:56:16,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:16,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 17:56:17,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:56:17,259 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-25 17:56:17,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 27 [2022-11-25 17:56:17,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:17,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:56:17,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-11-25 17:56:17,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:17,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 17:56:18,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:56:18,058 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-25 17:56:18,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-25 17:56:18,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:18,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:56:18,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-11-25 17:56:18,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:18,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 17:56:18,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:56:18,886 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-25 17:56:18,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-25 17:56:19,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:19,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:56:19,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-11-25 17:56:19,419 INFO L321 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2022-11-25 17:56:19,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-11-25 17:56:19,609 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-25 17:56:19,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-25 17:56:19,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 17:56:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30951 backedges. 10945 proven. 136 refuted. 0 times theorem prover too weak. 19870 trivial. 0 not checked. [2022-11-25 17:56:19,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:06:18,145 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4549 Int) (v_ArrVal_4547 Int) (v_ArrVal_4558 Int) (v_ArrVal_4559 Int) (v_ArrVal_4556 Int) (v_ArrVal_4546 Int) (v_ArrVal_4568 Int) (v_ArrVal_4543 Int) (v_ArrVal_4566 Int) (v_ArrVal_4563 Int) (v_ArrVal_4553 Int) (v_ArrVal_4561 Int) (v_ArrVal_4551 Int) (|v_t1Thread1of1ForFork0_~i~0#1_471| Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_515| Int) (|v_t1Thread1of1ForFork0_~i~0#1_470| Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_513| Int)) (let ((.cse10 (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ (* |c_t1Thread1of1ForFork0_enqueue_#t~mem36#1| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_4543)) (.cse11 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (let ((.cse13 (let ((.cse14 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse10 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_4546) .cse11 v_ArrVal_4547)))) (store .cse14 |c_~#stored_elements~0.base| (store (select .cse14 |c_~#stored_elements~0.base|) (+ |c_~#stored_elements~0.offset| (* |c_t1Thread1of1ForFork0_~i~0#1| 4)) v_ArrVal_4549))))) (let ((.cse0 (select .cse13 |c_~#queue~0.base|))) (let ((.cse2 (store .cse0 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_515| 4)) v_ArrVal_4551)) (.cse7 (+ 1608 |c_~#queue~0.offset|)) (.cse1 (+ |c_~#queue~0.offset| 1604))) (let ((.cse5 (let ((.cse12 (store .cse13 |c_~#queue~0.base| (store (store .cse2 .cse7 v_ArrVal_4553) .cse1 v_ArrVal_4556)))) (store .cse12 |c_~#stored_elements~0.base| (store (select .cse12 |c_~#stored_elements~0.base|) (+ |c_~#stored_elements~0.offset| (* |v_t1Thread1of1ForFork0_~i~0#1_471| 4)) v_ArrVal_4558))))) (let ((.cse9 (select .cse5 |c_~#queue~0.base|))) (let ((.cse8 (select .cse10 .cse11)) (.cse6 (store .cse9 (+ |c_~#queue~0.offset| (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_513| 4)) v_ArrVal_4559))) (or (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_515| (select .cse0 .cse1))) (< (+ (select .cse2 .cse1) 1) v_ArrVal_4556) (not (= 400 (select (let ((.cse3 (select (let ((.cse4 (store .cse5 |c_~#queue~0.base| (store (store .cse6 .cse7 v_ArrVal_4561) .cse1 v_ArrVal_4563)))) (store .cse4 |c_~#stored_elements~0.base| (store (select .cse4 |c_~#stored_elements~0.base|) (+ (* |v_t1Thread1of1ForFork0_~i~0#1_470| 4) |c_~#stored_elements~0.offset|) v_ArrVal_4566))) |c_~#queue~0.base|))) (store .cse3 (+ |c_~#queue~0.offset| (* (select .cse3 .cse1) 4)) v_ArrVal_4568)) .cse1))) (< (+ .cse8 1) v_ArrVal_4547) (= 400 .cse8) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_513| (select .cse9 .cse1))) (not (<= (+ |c_t1Thread1of1ForFork0_~i~0#1| 1) |v_t1Thread1of1ForFork0_~i~0#1_471|)) (not (<= (+ |v_t1Thread1of1ForFork0_~i~0#1_471| 1) |v_t1Thread1of1ForFork0_~i~0#1_470|)) (< (+ (select .cse6 .cse1) 1) v_ArrVal_4563)))))))))) is different from false