./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:53:24,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:53:24,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:53:24,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:53:24,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:53:24,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:53:24,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:53:24,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:53:24,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:53:24,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:53:24,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:53:24,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:53:24,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:53:24,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:53:24,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:53:24,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:53:24,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:53:24,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:53:24,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:53:24,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:53:24,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:53:24,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:53:24,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:53:24,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:53:24,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:53:24,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:53:24,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:53:24,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:53:24,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:53:24,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:53:24,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:53:24,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:53:24,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:53:24,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:53:24,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:53:24,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:53:24,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:53:24,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:53:24,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:53:24,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:53:24,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:53:24,770 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:53:24,817 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:53:24,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:53:24,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:53:24,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:53:24,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:53:24,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:53:24,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:53:24,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:53:24,820 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:53:24,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:53:24,822 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:53:24,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:53:24,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:53:24,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:53:24,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:53:24,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:53:24,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:53:24,823 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:53:24,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:53:24,824 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:53:24,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:53:24,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:53:24,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:53:24,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:53:24,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:24,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:53:24,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:53:24,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:53:24,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:53:24,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:53:24,827 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:53:24,827 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:53:24,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:53:24,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-11-02 20:53:25,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:53:25,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:53:25,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:53:25,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:53:25,237 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:53:25,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-02 20:53:25,320 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/data/bf6bf211f/b6d8b570c2d643b2913a663e6d8bcea5/FLAGb312c99c6 [2022-11-02 20:53:25,947 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:53:25,948 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-02 20:53:25,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/data/bf6bf211f/b6d8b570c2d643b2913a663e6d8bcea5/FLAGb312c99c6 [2022-11-02 20:53:26,297 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/data/bf6bf211f/b6d8b570c2d643b2913a663e6d8bcea5 [2022-11-02 20:53:26,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:53:26,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:53:26,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:26,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:53:26,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:53:26,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b013853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26, skipping insertion in model container [2022-11-02 20:53:26,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:53:26,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:53:26,565 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-02 20:53:26,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:26,578 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:53:26,600 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-02 20:53:26,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:26,617 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:53:26,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26 WrapperNode [2022-11-02 20:53:26,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:26,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:53:26,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:53:26,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:53:26,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,656 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-02 20:53:26,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:53:26,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:53:26,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:53:26,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:53:26,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,681 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:53:26,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:53:26,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:53:26,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:53:26,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (1/1) ... [2022-11-02 20:53:26,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:26,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:26,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:53:26,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:53:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:53:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:53:26,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:53:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:53:26,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:53:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:53:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:53:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:53:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:53:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:53:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:53:26,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:53:26,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:53:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:53:26,781 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:53:26,880 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:53:26,882 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:53:27,173 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:53:27,259 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:53:27,259 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:53:27,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:53:27 BoogieIcfgContainer [2022-11-02 20:53:27,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:53:27,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:53:27,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:53:27,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:53:27,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:53:26" (1/3) ... [2022-11-02 20:53:27,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7449ba82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:53:27, skipping insertion in model container [2022-11-02 20:53:27,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:26" (2/3) ... [2022-11-02 20:53:27,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7449ba82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:53:27, skipping insertion in model container [2022-11-02 20:53:27,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:53:27" (3/3) ... [2022-11-02 20:53:27,274 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-11-02 20:53:27,284 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:53:27,295 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:53:27,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:53:27,296 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:53:27,359 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:53:27,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-11-02 20:53:27,514 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2022-11-02 20:53:27,528 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:53:27,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-11-02 20:53:27,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-11-02 20:53:27,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-11-02 20:53:27,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:53:27,574 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;@512321e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:53:27,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:53:27,624 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-11-02 20:53:27,624 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:53:27,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:27,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:27,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1621300256, now seen corresponding path program 1 times [2022-11-02 20:53:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:27,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497282255] [2022-11-02 20:53:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:27,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:28,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:28,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497282255] [2022-11-02 20:53:28,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497282255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:28,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:28,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:53:28,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412004636] [2022-11-02 20:53:28,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:28,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:53:28,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:28,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:53:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:53:28,119 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 82 [2022-11-02 20:53:28,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:28,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:28,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 82 [2022-11-02 20:53:28,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:28,217 INFO L130 PetriNetUnfolder]: 10/93 cut-off events. [2022-11-02 20:53:28,220 INFO L131 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-11-02 20:53:28,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 93 events. 10/93 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 1 based on Foata normal form. 11/94 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-11-02 20:53:28,222 INFO L137 encePairwiseOnDemand]: 78/82 looper letters, 6 selfloop transitions, 0 changer transitions 2/67 dead transitions. [2022-11-02 20:53:28,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 158 flow [2022-11-02 20:53:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:53:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:53:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-11-02 20:53:28,243 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2022-11-02 20:53:28,243 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-11-02 20:53:28,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-11-02 20:53:28,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:28,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-11-02 20:53:28,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:28,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:28,266 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:28,268 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 2 states and 152 transitions. [2022-11-02 20:53:28,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 158 flow [2022-11-02 20:53:28,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:53:28,282 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 134 flow [2022-11-02 20:53:28,284 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-11-02 20:53:28,293 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2022-11-02 20:53:28,294 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 134 flow [2022-11-02 20:53:28,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:28,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:28,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:28,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:53:28,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:28,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:28,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-11-02 20:53:28,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:28,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822970164] [2022-11-02 20:53:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:28,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:28,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:28,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822970164] [2022-11-02 20:53:28,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822970164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:28,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:28,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:53:28,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620255802] [2022-11-02 20:53:28,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:28,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:53:28,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:53:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:53:28,792 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-11-02 20:53:28,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:28,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:28,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-11-02 20:53:28,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:28,897 INFO L130 PetriNetUnfolder]: 64/183 cut-off events. [2022-11-02 20:53:28,898 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:53:28,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 183 events. 64/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 541 event pairs, 25 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 322. Up to 80 conditions per place. [2022-11-02 20:53:28,900 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 26 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2022-11-02 20:53:28,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 213 flow [2022-11-02 20:53:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:53:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:53:28,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2022-11-02 20:53:28,903 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2022-11-02 20:53:28,903 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2022-11-02 20:53:28,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2022-11-02 20:53:28,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:28,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2022-11-02 20:53:28,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:28,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:28,908 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:28,908 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 134 flow. Second operand 6 states and 344 transitions. [2022-11-02 20:53:28,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 213 flow [2022-11-02 20:53:28,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:53:28,911 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 152 flow [2022-11-02 20:53:28,912 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2022-11-02 20:53:28,912 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2022-11-02 20:53:28,913 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 152 flow [2022-11-02 20:53:28,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:28,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:28,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:28,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:53:28,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash 346200639, now seen corresponding path program 1 times [2022-11-02 20:53:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:28,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160010579] [2022-11-02 20:53:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:29,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:29,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160010579] [2022-11-02 20:53:29,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160010579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:29,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:29,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:53:29,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80188691] [2022-11-02 20:53:29,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:29,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:53:29,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:29,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:53:29,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:29,065 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-11-02 20:53:29,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:29,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-11-02 20:53:29,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:29,215 INFO L130 PetriNetUnfolder]: 87/283 cut-off events. [2022-11-02 20:53:29,215 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-02 20:53:29,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 283 events. 87/283 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1081 event pairs, 37 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 517. Up to 113 conditions per place. [2022-11-02 20:53:29,218 INFO L137 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-11-02 20:53:29,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 291 flow [2022-11-02 20:53:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:53:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:53:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-11-02 20:53:29,222 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-11-02 20:53:29,222 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-11-02 20:53:29,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-11-02 20:53:29,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:29,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-11-02 20:53:29,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,227 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,228 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-11-02 20:53:29,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 291 flow [2022-11-02 20:53:29,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:53:29,231 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 170 flow [2022-11-02 20:53:29,231 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2022-11-02 20:53:29,232 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-11-02 20:53:29,232 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 170 flow [2022-11-02 20:53:29,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:29,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:29,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:53:29,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:29,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:29,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1801956563, now seen corresponding path program 2 times [2022-11-02 20:53:29,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:29,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151330240] [2022-11-02 20:53:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:29,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:29,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:29,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151330240] [2022-11-02 20:53:29,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151330240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:29,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785141257] [2022-11-02 20:53:29,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:53:29,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:29,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:29,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:29,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:53:29,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:53:29,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:29,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:53:29,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:53:29,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:29,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785141257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:29,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:53:29,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-11-02 20:53:29,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022737881] [2022-11-02 20:53:29,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:29,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:53:29,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:53:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:53:29,727 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-11-02 20:53:29,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:29,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-11-02 20:53:29,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:29,915 INFO L130 PetriNetUnfolder]: 44/166 cut-off events. [2022-11-02 20:53:29,915 INFO L131 PetriNetUnfolder]: For 50/56 co-relation queries the response was YES. [2022-11-02 20:53:29,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 166 events. 44/166 cut-off events. For 50/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 521 event pairs, 23 based on Foata normal form. 13/174 useless extension candidates. Maximal degree in co-relation 338. Up to 66 conditions per place. [2022-11-02 20:53:29,918 INFO L137 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-11-02 20:53:29,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 233 flow [2022-11-02 20:53:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:53:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:53:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-11-02 20:53:29,921 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-11-02 20:53:29,921 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-11-02 20:53:29,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-11-02 20:53:29,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:29,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-11-02 20:53:29,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,927 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,927 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-11-02 20:53:29,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 233 flow [2022-11-02 20:53:29,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-02 20:53:29,931 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 168 flow [2022-11-02 20:53:29,931 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2022-11-02 20:53:29,932 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2022-11-02 20:53:29,932 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 168 flow [2022-11-02 20:53:29,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:29,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:29,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:53:30,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-02 20:53:30,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1175529915, now seen corresponding path program 1 times [2022-11-02 20:53:30,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:30,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680682381] [2022-11-02 20:53:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:30,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:30,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:30,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680682381] [2022-11-02 20:53:30,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680682381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:30,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720303918] [2022-11-02 20:53:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:30,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:30,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:30,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:30,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:53:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:53:30,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:30,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:31,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720303918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:31,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:31,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-11-02 20:53:31,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955723015] [2022-11-02 20:53:31,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:31,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:53:31,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:31,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:53:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:53:31,160 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-11-02 20:53:31,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:31,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:31,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-11-02 20:53:31,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:31,272 INFO L130 PetriNetUnfolder]: 17/162 cut-off events. [2022-11-02 20:53:31,272 INFO L131 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-11-02 20:53:31,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 422 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 266. Up to 21 conditions per place. [2022-11-02 20:53:31,275 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-11-02 20:53:31,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 302 flow [2022-11-02 20:53:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:53:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:53:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-11-02 20:53:31,277 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-11-02 20:53:31,278 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-11-02 20:53:31,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-11-02 20:53:31,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:31,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-11-02 20:53:31,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:31,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:31,282 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:31,283 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-11-02 20:53:31,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 302 flow [2022-11-02 20:53:31,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-02 20:53:31,291 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2022-11-02 20:53:31,291 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2022-11-02 20:53:31,294 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2022-11-02 20:53:31,295 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2022-11-02 20:53:31,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:31,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:31,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:31,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:31,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:31,523 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:31,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:31,524 INFO L85 PathProgramCache]: Analyzing trace with hash 935055537, now seen corresponding path program 2 times [2022-11-02 20:53:31,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:31,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810156099] [2022-11-02 20:53:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:31,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:53:31,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:31,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810156099] [2022-11-02 20:53:31,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810156099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:31,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639961289] [2022-11-02 20:53:31,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:53:31,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:31,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:31,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:31,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:53:31,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:53:31,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:53:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:53:31,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:53:32,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639961289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:32,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:32,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-11-02 20:53:32,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330131699] [2022-11-02 20:53:32,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:32,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:53:32,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:53:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:53:32,058 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-11-02 20:53:32,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:32,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:32,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-11-02 20:53:32,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:32,243 INFO L130 PetriNetUnfolder]: 109/370 cut-off events. [2022-11-02 20:53:32,244 INFO L131 PetriNetUnfolder]: For 199/209 co-relation queries the response was YES. [2022-11-02 20:53:32,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 370 events. 109/370 cut-off events. For 199/209 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1748 event pairs, 24 based on Foata normal form. 15/376 useless extension candidates. Maximal degree in co-relation 819. Up to 124 conditions per place. [2022-11-02 20:53:32,247 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-11-02 20:53:32,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 414 flow [2022-11-02 20:53:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:53:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 20:53:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-11-02 20:53:32,250 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-11-02 20:53:32,250 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-11-02 20:53:32,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-11-02 20:53:32,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:32,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-11-02 20:53:32,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:32,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:32,263 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:32,263 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-11-02 20:53:32,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 414 flow [2022-11-02 20:53:32,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-02 20:53:32,267 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 338 flow [2022-11-02 20:53:32,267 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-11-02 20:53:32,268 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2022-11-02 20:53:32,268 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 338 flow [2022-11-02 20:53:32,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:32,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:32,269 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:32,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:32,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:32,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1891359299, now seen corresponding path program 3 times [2022-11-02 20:53:32,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:32,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489682359] [2022-11-02 20:53:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:32,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:32,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489682359] [2022-11-02 20:53:32,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489682359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:32,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667463356] [2022-11-02 20:53:32,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:53:32,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:32,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:32,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:32,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:53:32,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:53:32,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:32,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:53:32,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:32,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:33,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667463356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:33,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:33,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2022-11-02 20:53:33,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794097754] [2022-11-02 20:53:33,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:33,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:53:33,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:33,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:53:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:53:33,165 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:53:33,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 338 flow. Second operand has 20 states, 20 states have (on average 59.85) internal successors, (1197), 20 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:33,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:33,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:53:33,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:35,039 INFO L130 PetriNetUnfolder]: 312/859 cut-off events. [2022-11-02 20:53:35,039 INFO L131 PetriNetUnfolder]: For 1295/1295 co-relation queries the response was YES. [2022-11-02 20:53:35,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 859 events. 312/859 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4686 event pairs, 14 based on Foata normal form. 29/887 useless extension candidates. Maximal degree in co-relation 2530. Up to 168 conditions per place. [2022-11-02 20:53:35,049 INFO L137 encePairwiseOnDemand]: 69/82 looper letters, 117 selfloop transitions, 134 changer transitions 11/307 dead transitions. [2022-11-02 20:53:35,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 307 transitions, 1960 flow [2022-11-02 20:53:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-02 20:53:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-02 20:53:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3368 transitions. [2022-11-02 20:53:35,059 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7467849223946785 [2022-11-02 20:53:35,060 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3368 transitions. [2022-11-02 20:53:35,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3368 transitions. [2022-11-02 20:53:35,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:35,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3368 transitions. [2022-11-02 20:53:35,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 61.236363636363635) internal successors, (3368), 55 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:35,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:35,087 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:35,087 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 338 flow. Second operand 55 states and 3368 transitions. [2022-11-02 20:53:35,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 307 transitions, 1960 flow [2022-11-02 20:53:35,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 307 transitions, 1952 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-02 20:53:35,110 INFO L231 Difference]: Finished difference. Result has 154 places, 206 transitions, 1422 flow [2022-11-02 20:53:35,110 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1422, PETRI_PLACES=154, PETRI_TRANSITIONS=206} [2022-11-02 20:53:35,111 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 82 predicate places. [2022-11-02 20:53:35,111 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 206 transitions, 1422 flow [2022-11-02 20:53:35,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.85) internal successors, (1197), 20 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:35,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:35,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:35,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:35,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:53:35,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1408127925, now seen corresponding path program 4 times [2022-11-02 20:53:35,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:35,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896339899] [2022-11-02 20:53:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:35,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:35,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:35,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896339899] [2022-11-02 20:53:35,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896339899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:35,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046361777] [2022-11-02 20:53:35,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:53:35,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:35,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:35,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:35,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:53:35,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:53:35,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:35,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:53:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:36,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:36,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046361777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:36,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:36,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-11-02 20:53:36,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385302527] [2022-11-02 20:53:36,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:36,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:53:36,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:36,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:53:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:53:36,287 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:53:36,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 206 transitions, 1422 flow. Second operand has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:36,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:36,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:53:36,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:38,576 INFO L130 PetriNetUnfolder]: 789/2290 cut-off events. [2022-11-02 20:53:38,576 INFO L131 PetriNetUnfolder]: For 7916/7916 co-relation queries the response was YES. [2022-11-02 20:53:38,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8790 conditions, 2290 events. 789/2290 cut-off events. For 7916/7916 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17294 event pairs, 54 based on Foata normal form. 124/2406 useless extension candidates. Maximal degree in co-relation 8764. Up to 444 conditions per place. [2022-11-02 20:53:38,604 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 312 selfloop transitions, 334 changer transitions 21/712 dead transitions. [2022-11-02 20:53:38,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 712 transitions, 6678 flow [2022-11-02 20:53:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-02 20:53:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-02 20:53:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3772 transitions. [2022-11-02 20:53:38,612 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7540983606557377 [2022-11-02 20:53:38,613 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3772 transitions. [2022-11-02 20:53:38,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3772 transitions. [2022-11-02 20:53:38,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:38,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3772 transitions. [2022-11-02 20:53:38,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.83606557377049) internal successors, (3772), 61 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:38,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:38,635 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:38,635 INFO L175 Difference]: Start difference. First operand has 154 places, 206 transitions, 1422 flow. Second operand 61 states and 3772 transitions. [2022-11-02 20:53:38,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 712 transitions, 6678 flow [2022-11-02 20:53:38,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 712 transitions, 6187 flow, removed 216 selfloop flow, removed 6 redundant places. [2022-11-02 20:53:38,702 INFO L231 Difference]: Finished difference. Result has 238 places, 492 transitions, 4915 flow [2022-11-02 20:53:38,702 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4915, PETRI_PLACES=238, PETRI_TRANSITIONS=492} [2022-11-02 20:53:38,703 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 166 predicate places. [2022-11-02 20:53:38,703 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 492 transitions, 4915 flow [2022-11-02 20:53:38,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:38,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:38,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:38,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:38,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:38,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:38,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1242560893, now seen corresponding path program 5 times [2022-11-02 20:53:38,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:38,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148907650] [2022-11-02 20:53:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:38,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:39,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:39,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148907650] [2022-11-02 20:53:39,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148907650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:39,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984438447] [2022-11-02 20:53:39,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:53:39,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:39,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:39,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:39,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:53:39,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:53:39,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:39,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:53:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:39,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:39,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984438447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:39,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:39,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-11-02 20:53:39,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546601536] [2022-11-02 20:53:39,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:39,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:53:39,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:39,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:53:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:53:39,876 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:53:39,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 492 transitions, 4915 flow. Second operand has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:39,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:39,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:53:39,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:41,731 INFO L130 PetriNetUnfolder]: 962/2730 cut-off events. [2022-11-02 20:53:41,732 INFO L131 PetriNetUnfolder]: For 23272/23272 co-relation queries the response was YES. [2022-11-02 20:53:41,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14528 conditions, 2730 events. 962/2730 cut-off events. For 23272/23272 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21703 event pairs, 19 based on Foata normal form. 33/2753 useless extension candidates. Maximal degree in co-relation 14474. Up to 512 conditions per place. [2022-11-02 20:53:41,776 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 183 selfloop transitions, 511 changer transitions 7/746 dead transitions. [2022-11-02 20:53:41,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 746 transitions, 9027 flow [2022-11-02 20:53:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-02 20:53:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-02 20:53:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-11-02 20:53:41,780 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-11-02 20:53:41,780 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-11-02 20:53:41,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-11-02 20:53:41,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:41,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-11-02 20:53:41,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:41,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:41,792 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:41,793 INFO L175 Difference]: Start difference. First operand has 238 places, 492 transitions, 4915 flow. Second operand 39 states and 2387 transitions. [2022-11-02 20:53:41,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 746 transitions, 9027 flow [2022-11-02 20:53:41,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 746 transitions, 8707 flow, removed 157 selfloop flow, removed 3 redundant places. [2022-11-02 20:53:41,967 INFO L231 Difference]: Finished difference. Result has 287 places, 646 transitions, 8206 flow [2022-11-02 20:53:41,967 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8206, PETRI_PLACES=287, PETRI_TRANSITIONS=646} [2022-11-02 20:53:41,968 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 215 predicate places. [2022-11-02 20:53:41,968 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 646 transitions, 8206 flow [2022-11-02 20:53:41,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:41,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:41,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:42,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:42,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:42,185 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1269435027, now seen corresponding path program 6 times [2022-11-02 20:53:42,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:42,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374220953] [2022-11-02 20:53:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:42,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:42,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:42,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374220953] [2022-11-02 20:53:42,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374220953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:42,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109480375] [2022-11-02 20:53:42,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:53:42,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:42,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:42,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:42,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:53:42,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:53:42,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:42,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:53:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:42,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:42,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109480375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:42,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:42,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-11-02 20:53:42,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492546850] [2022-11-02 20:53:42,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:42,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:53:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:53:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:53:42,862 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:53:42,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 646 transitions, 8206 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:42,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:42,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:53:42,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:46,345 INFO L130 PetriNetUnfolder]: 1247/3669 cut-off events. [2022-11-02 20:53:46,346 INFO L131 PetriNetUnfolder]: For 47008/47008 co-relation queries the response was YES. [2022-11-02 20:53:46,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 3669 events. 1247/3669 cut-off events. For 47008/47008 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 31669 event pairs, 57 based on Foata normal form. 38/3675 useless extension candidates. Maximal degree in co-relation 22481. Up to 626 conditions per place. [2022-11-02 20:53:46,448 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 256 selfloop transitions, 795 changer transitions 9/1105 dead transitions. [2022-11-02 20:53:46,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1105 transitions, 16324 flow [2022-11-02 20:53:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-02 20:53:46,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-02 20:53:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4397 transitions. [2022-11-02 20:53:46,470 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7447493224932249 [2022-11-02 20:53:46,471 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4397 transitions. [2022-11-02 20:53:46,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4397 transitions. [2022-11-02 20:53:46,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:46,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4397 transitions. [2022-11-02 20:53:46,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 61.06944444444444) internal successors, (4397), 72 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:46,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:46,516 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:46,525 INFO L175 Difference]: Start difference. First operand has 287 places, 646 transitions, 8206 flow. Second operand 72 states and 4397 transitions. [2022-11-02 20:53:46,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1105 transitions, 16324 flow [2022-11-02 20:53:46,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1105 transitions, 15317 flow, removed 156 selfloop flow, removed 19 redundant places. [2022-11-02 20:53:46,959 INFO L231 Difference]: Finished difference. Result has 369 places, 944 transitions, 14092 flow [2022-11-02 20:53:46,961 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7528, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=14092, PETRI_PLACES=369, PETRI_TRANSITIONS=944} [2022-11-02 20:53:46,961 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 297 predicate places. [2022-11-02 20:53:46,962 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 944 transitions, 14092 flow [2022-11-02 20:53:46,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:46,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:46,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:47,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:47,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:53:47,177 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:47,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1154924529, now seen corresponding path program 7 times [2022-11-02 20:53:47,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:47,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418700637] [2022-11-02 20:53:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:47,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:47,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:47,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418700637] [2022-11-02 20:53:47,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418700637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:47,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221614170] [2022-11-02 20:53:47,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:53:47,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:47,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:47,430 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:47,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:53:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:47,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:53:47,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:47,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:48,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221614170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:48,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:48,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-11-02 20:53:48,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094284594] [2022-11-02 20:53:48,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:48,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:53:48,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:48,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:53:48,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:53:48,083 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:53:48,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 944 transitions, 14092 flow. Second operand has 22 states, 22 states have (on average 59.40909090909091) internal successors, (1307), 22 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:48,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:48,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:53:48,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:51,265 INFO L130 PetriNetUnfolder]: 1335/4010 cut-off events. [2022-11-02 20:53:51,265 INFO L131 PetriNetUnfolder]: For 67203/67203 co-relation queries the response was YES. [2022-11-02 20:53:51,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27448 conditions, 4010 events. 1335/4010 cut-off events. For 67203/67203 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 35691 event pairs, 28 based on Foata normal form. 2/4002 useless extension candidates. Maximal degree in co-relation 27354. Up to 674 conditions per place. [2022-11-02 20:53:51,363 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 381 selfloop transitions, 755 changer transitions 35/1216 dead transitions. [2022-11-02 20:53:51,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1216 transitions, 21058 flow [2022-11-02 20:53:51,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 20:53:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-02 20:53:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-11-02 20:53:51,370 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-11-02 20:53:51,370 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-11-02 20:53:51,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-11-02 20:53:51,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:51,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-11-02 20:53:51,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:51,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:51,388 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:51,388 INFO L175 Difference]: Start difference. First operand has 369 places, 944 transitions, 14092 flow. Second operand 41 states and 2515 transitions. [2022-11-02 20:53:51,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1216 transitions, 21058 flow [2022-11-02 20:53:52,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1216 transitions, 20592 flow, removed 170 selfloop flow, removed 21 redundant places. [2022-11-02 20:53:52,193 INFO L231 Difference]: Finished difference. Result has 396 places, 1064 transitions, 17958 flow [2022-11-02 20:53:52,195 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=13600, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17958, PETRI_PLACES=396, PETRI_TRANSITIONS=1064} [2022-11-02 20:53:52,195 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 324 predicate places. [2022-11-02 20:53:52,195 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1064 transitions, 17958 flow [2022-11-02 20:53:52,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.40909090909091) internal successors, (1307), 22 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:52,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:52,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:52,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:52,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:53:52,413 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash -588062631, now seen corresponding path program 8 times [2022-11-02 20:53:52,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:52,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944398025] [2022-11-02 20:53:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:52,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:52,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:52,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944398025] [2022-11-02 20:53:52,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944398025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:52,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968741000] [2022-11-02 20:53:52,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:53:52,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:52,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:52,642 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:52,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:53:52,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:53:52,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:53:52,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:52,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:53,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968741000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:53,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:53,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-02 20:53:53,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428520724] [2022-11-02 20:53:53,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:53,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:53:53,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:53,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:53:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:53:53,215 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:53:53,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1064 transitions, 17958 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:53,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:53,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:53:53,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:55,528 INFO L130 PetriNetUnfolder]: 1306/3863 cut-off events. [2022-11-02 20:53:55,528 INFO L131 PetriNetUnfolder]: For 65840/65840 co-relation queries the response was YES. [2022-11-02 20:53:55,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28441 conditions, 3863 events. 1306/3863 cut-off events. For 65840/65840 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33845 event pairs, 125 based on Foata normal form. 1/3802 useless extension candidates. Maximal degree in co-relation 28344. Up to 655 conditions per place. [2022-11-02 20:53:55,603 INFO L137 encePairwiseOnDemand]: 71/82 looper letters, 467 selfloop transitions, 618 changer transitions 12/1142 dead transitions. [2022-11-02 20:53:55,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1142 transitions, 21266 flow [2022-11-02 20:53:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:53:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:53:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1296 transitions. [2022-11-02 20:53:55,608 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7526132404181185 [2022-11-02 20:53:55,608 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1296 transitions. [2022-11-02 20:53:55,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1296 transitions. [2022-11-02 20:53:55,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:55,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1296 transitions. [2022-11-02 20:53:55,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:55,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:55,617 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:55,617 INFO L175 Difference]: Start difference. First operand has 396 places, 1064 transitions, 17958 flow. Second operand 21 states and 1296 transitions. [2022-11-02 20:53:55,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1142 transitions, 21266 flow [2022-11-02 20:53:56,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1142 transitions, 20505 flow, removed 95 selfloop flow, removed 20 redundant places. [2022-11-02 20:53:56,533 INFO L231 Difference]: Finished difference. Result has 398 places, 1081 transitions, 18737 flow [2022-11-02 20:53:56,535 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17233, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=18737, PETRI_PLACES=398, PETRI_TRANSITIONS=1081} [2022-11-02 20:53:56,535 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 326 predicate places. [2022-11-02 20:53:56,535 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1081 transitions, 18737 flow [2022-11-02 20:53:56,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:56,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:56,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:56,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:56,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:56,761 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:53:56,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:56,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1260651241, now seen corresponding path program 9 times [2022-11-02 20:53:56,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:56,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903085879] [2022-11-02 20:53:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:56,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:56,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903085879] [2022-11-02 20:53:56,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903085879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:56,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089421996] [2022-11-02 20:53:56,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:53:56,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:56,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:56,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:56,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:53:57,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:53:57,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:57,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:53:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:57,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:57,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089421996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:57,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:57,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-02 20:53:57,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369858276] [2022-11-02 20:53:57,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:57,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:53:57,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:57,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:53:57,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:53:57,439 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:53:57,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1081 transitions, 18737 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:57,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:57,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:53:57,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:01,421 INFO L130 PetriNetUnfolder]: 1753/5165 cut-off events. [2022-11-02 20:54:01,422 INFO L131 PetriNetUnfolder]: For 92340/92340 co-relation queries the response was YES. [2022-11-02 20:54:01,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38676 conditions, 5165 events. 1753/5165 cut-off events. For 92340/92340 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 48220 event pairs, 70 based on Foata normal form. 43/5173 useless extension candidates. Maximal degree in co-relation 38577. Up to 927 conditions per place. [2022-11-02 20:54:01,514 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 339 selfloop transitions, 1251 changer transitions 3/1638 dead transitions. [2022-11-02 20:54:01,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1638 transitions, 31405 flow [2022-11-02 20:54:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-02 20:54:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-02 20:54:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3837 transitions. [2022-11-02 20:54:01,521 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2022-11-02 20:54:01,522 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3837 transitions. [2022-11-02 20:54:01,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3837 transitions. [2022-11-02 20:54:01,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:01,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3837 transitions. [2022-11-02 20:54:01,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.904761904761905) internal successors, (3837), 63 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:01,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:01,542 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:01,543 INFO L175 Difference]: Start difference. First operand has 398 places, 1081 transitions, 18737 flow. Second operand 63 states and 3837 transitions. [2022-11-02 20:54:01,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1638 transitions, 31405 flow [2022-11-02 20:54:02,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1638 transitions, 30349 flow, removed 13 selfloop flow, removed 11 redundant places. [2022-11-02 20:54:02,531 INFO L231 Difference]: Finished difference. Result has 468 places, 1493 transitions, 29791 flow [2022-11-02 20:54:02,533 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17993, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=848, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=29791, PETRI_PLACES=468, PETRI_TRANSITIONS=1493} [2022-11-02 20:54:02,533 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 396 predicate places. [2022-11-02 20:54:02,533 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 1493 transitions, 29791 flow [2022-11-02 20:54:02,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:02,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:02,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:02,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:02,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:02,735 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:54:02,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:02,736 INFO L85 PathProgramCache]: Analyzing trace with hash -611324017, now seen corresponding path program 10 times [2022-11-02 20:54:02,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:02,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41049269] [2022-11-02 20:54:02,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:02,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:02,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:02,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41049269] [2022-11-02 20:54:02,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41049269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:02,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325348819] [2022-11-02 20:54:02,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:54:02,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:02,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:02,929 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:02,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:54:03,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:54:03,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:54:03,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:03,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:03,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325348819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:03,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:03,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-02 20:54:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563663982] [2022-11-02 20:54:03,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:54:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:54:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:54:03,682 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:54:03,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1493 transitions, 29791 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:03,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:03,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:54:03,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:08,284 INFO L130 PetriNetUnfolder]: 1765/5268 cut-off events. [2022-11-02 20:54:08,284 INFO L131 PetriNetUnfolder]: For 119802/119802 co-relation queries the response was YES. [2022-11-02 20:54:08,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43665 conditions, 5268 events. 1765/5268 cut-off events. For 119802/119802 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 49767 event pairs, 88 based on Foata normal form. 4/5229 useless extension candidates. Maximal degree in co-relation 43547. Up to 900 conditions per place. [2022-11-02 20:54:08,533 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 539 selfloop transitions, 1047 changer transitions 16/1647 dead transitions. [2022-11-02 20:54:08,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1647 transitions, 35637 flow [2022-11-02 20:54:08,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 20:54:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-02 20:54:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2525 transitions. [2022-11-02 20:54:08,538 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7510410469958358 [2022-11-02 20:54:08,538 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2525 transitions. [2022-11-02 20:54:08,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2525 transitions. [2022-11-02 20:54:08,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:08,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2525 transitions. [2022-11-02 20:54:08,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.58536585365854) internal successors, (2525), 41 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,551 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:08,551 INFO L175 Difference]: Start difference. First operand has 468 places, 1493 transitions, 29791 flow. Second operand 41 states and 2525 transitions. [2022-11-02 20:54:08,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1647 transitions, 35637 flow [2022-11-02 20:54:10,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1647 transitions, 34840 flow, removed 132 selfloop flow, removed 31 redundant places. [2022-11-02 20:54:10,050 INFO L231 Difference]: Finished difference. Result has 484 places, 1527 transitions, 32213 flow [2022-11-02 20:54:10,052 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=28994, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=32213, PETRI_PLACES=484, PETRI_TRANSITIONS=1527} [2022-11-02 20:54:10,052 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 412 predicate places. [2022-11-02 20:54:10,053 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1527 transitions, 32213 flow [2022-11-02 20:54:10,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:10,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:10,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:10,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:10,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:54:10,269 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:54:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2101670421, now seen corresponding path program 11 times [2022-11-02 20:54:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241357374] [2022-11-02 20:54:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:10,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:10,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:10,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241357374] [2022-11-02 20:54:10,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241357374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:10,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590471740] [2022-11-02 20:54:10,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:54:10,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:10,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:10,501 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:10,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:54:10,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:54:10,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:10,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:54:10,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:10,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:10,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590471740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:10,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:10,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-11-02 20:54:10,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420463009] [2022-11-02 20:54:10,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:10,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:54:10,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:10,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:54:10,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:54:10,876 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:54:10,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1527 transitions, 32213 flow. Second operand has 20 states, 20 states have (on average 59.35) internal successors, (1187), 20 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:10,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:10,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:54:10,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:17,454 INFO L130 PetriNetUnfolder]: 2376/7435 cut-off events. [2022-11-02 20:54:17,454 INFO L131 PetriNetUnfolder]: For 183826/183826 co-relation queries the response was YES. [2022-11-02 20:54:17,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62975 conditions, 7435 events. 2376/7435 cut-off events. For 183826/183826 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 76444 event pairs, 116 based on Foata normal form. 13/7406 useless extension candidates. Maximal degree in co-relation 62851. Up to 1787 conditions per place. [2022-11-02 20:54:17,627 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1289 selfloop transitions, 875 changer transitions 26/2235 dead transitions. [2022-11-02 20:54:17,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 2235 transitions, 51483 flow [2022-11-02 20:54:17,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-02 20:54:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-02 20:54:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2898 transitions. [2022-11-02 20:54:17,635 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7519460300985988 [2022-11-02 20:54:17,635 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2898 transitions. [2022-11-02 20:54:17,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2898 transitions. [2022-11-02 20:54:17,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:17,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2898 transitions. [2022-11-02 20:54:17,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 61.659574468085104) internal successors, (2898), 47 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:17,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 82.0) internal successors, (3936), 48 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:17,653 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 82.0) internal successors, (3936), 48 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:17,653 INFO L175 Difference]: Start difference. First operand has 484 places, 1527 transitions, 32213 flow. Second operand 47 states and 2898 transitions. [2022-11-02 20:54:17,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 2235 transitions, 51483 flow [2022-11-02 20:54:20,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 2235 transitions, 49701 flow, removed 141 selfloop flow, removed 25 redundant places. [2022-11-02 20:54:20,441 INFO L231 Difference]: Finished difference. Result has 523 places, 1887 transitions, 41923 flow [2022-11-02 20:54:20,443 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30833, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=41923, PETRI_PLACES=523, PETRI_TRANSITIONS=1887} [2022-11-02 20:54:20,444 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 451 predicate places. [2022-11-02 20:54:20,444 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1887 transitions, 41923 flow [2022-11-02 20:54:20,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.35) internal successors, (1187), 20 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:20,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:20,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:20,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:20,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:54:20,661 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:54:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:20,661 INFO L85 PathProgramCache]: Analyzing trace with hash -432017137, now seen corresponding path program 12 times [2022-11-02 20:54:20,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:20,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417930016] [2022-11-02 20:54:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:20,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:20,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:20,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417930016] [2022-11-02 20:54:20,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417930016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:20,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962685848] [2022-11-02 20:54:20,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:54:20,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:20,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:20,897 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:20,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:54:20,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:54:20,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:20,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:54:20,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:21,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:21,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962685848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:21,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:21,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-02 20:54:21,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950487181] [2022-11-02 20:54:21,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:21,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:54:21,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:54:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:54:21,460 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:54:21,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1887 transitions, 41923 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:21,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:21,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:54:21,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:28,400 INFO L130 PetriNetUnfolder]: 2378/7361 cut-off events. [2022-11-02 20:54:28,400 INFO L131 PetriNetUnfolder]: For 212343/212343 co-relation queries the response was YES. [2022-11-02 20:54:28,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66281 conditions, 7361 events. 2378/7361 cut-off events. For 212343/212343 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 75298 event pairs, 127 based on Foata normal form. 1/7337 useless extension candidates. Maximal degree in co-relation 66139. Up to 3427 conditions per place. [2022-11-02 20:54:28,587 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1510 selfloop transitions, 372 changer transitions 8/1935 dead transitions. [2022-11-02 20:54:28,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1935 transitions, 46556 flow [2022-11-02 20:54:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:54:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:54:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1100 transitions. [2022-11-02 20:54:28,590 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7452574525745257 [2022-11-02 20:54:28,590 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1100 transitions. [2022-11-02 20:54:28,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1100 transitions. [2022-11-02 20:54:28,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:28,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1100 transitions. [2022-11-02 20:54:28,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.111111111111114) internal successors, (1100), 18 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:28,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:28,597 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:28,597 INFO L175 Difference]: Start difference. First operand has 523 places, 1887 transitions, 41923 flow. Second operand 18 states and 1100 transitions. [2022-11-02 20:54:28,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1935 transitions, 46556 flow [2022-11-02 20:54:31,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1935 transitions, 45441 flow, removed 376 selfloop flow, removed 13 redundant places. [2022-11-02 20:54:31,987 INFO L231 Difference]: Finished difference. Result has 530 places, 1898 transitions, 42255 flow [2022-11-02 20:54:31,989 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=40822, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=42255, PETRI_PLACES=530, PETRI_TRANSITIONS=1898} [2022-11-02 20:54:31,989 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 458 predicate places. [2022-11-02 20:54:31,989 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 1898 transitions, 42255 flow [2022-11-02 20:54:31,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:31,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:31,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:32,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:32,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:54:32,200 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:54:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:32,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1107215807, now seen corresponding path program 13 times [2022-11-02 20:54:32,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:32,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933775116] [2022-11-02 20:54:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:32,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:32,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933775116] [2022-11-02 20:54:32,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933775116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:32,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608804353] [2022-11-02 20:54:32,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:54:32,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:32,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:32,398 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:32,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:54:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:32,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:54:32,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:32,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:32,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608804353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:32,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:32,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-02 20:54:32,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838831961] [2022-11-02 20:54:32,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:32,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:54:32,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:54:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:54:32,855 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:54:32,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 1898 transitions, 42255 flow. Second operand has 23 states, 23 states have (on average 59.52173913043478) internal successors, (1369), 23 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:32,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:32,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:54:32,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:42,261 INFO L130 PetriNetUnfolder]: 2664/8374 cut-off events. [2022-11-02 20:54:42,261 INFO L131 PetriNetUnfolder]: For 252846/252846 co-relation queries the response was YES. [2022-11-02 20:54:42,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75353 conditions, 8374 events. 2664/8374 cut-off events. For 252846/252846 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 87816 event pairs, 141 based on Foata normal form. 71/8395 useless extension candidates. Maximal degree in co-relation 75206. Up to 1482 conditions per place. [2022-11-02 20:54:42,459 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 782 selfloop transitions, 1577 changer transitions 4/2408 dead transitions. [2022-11-02 20:54:42,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 2408 transitions, 58081 flow [2022-11-02 20:54:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-02 20:54:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-11-02 20:54:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3624 transitions. [2022-11-02 20:54:42,464 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7490698635799917 [2022-11-02 20:54:42,464 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3624 transitions. [2022-11-02 20:54:42,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3624 transitions. [2022-11-02 20:54:42,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:42,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3624 transitions. [2022-11-02 20:54:42,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 61.42372881355932) internal successors, (3624), 59 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:42,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:42,480 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:42,480 INFO L175 Difference]: Start difference. First operand has 530 places, 1898 transitions, 42255 flow. Second operand 59 states and 3624 transitions. [2022-11-02 20:54:42,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 2408 transitions, 58081 flow [2022-11-02 20:54:46,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 2408 transitions, 57816 flow, removed 42 selfloop flow, removed 12 redundant places. [2022-11-02 20:54:46,834 INFO L231 Difference]: Finished difference. Result has 588 places, 2216 transitions, 55280 flow [2022-11-02 20:54:46,835 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=41752, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=55280, PETRI_PLACES=588, PETRI_TRANSITIONS=2216} [2022-11-02 20:54:46,836 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 516 predicate places. [2022-11-02 20:54:46,836 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 2216 transitions, 55280 flow [2022-11-02 20:54:46,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.52173913043478) internal successors, (1369), 23 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:46,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:46,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:46,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:47,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:54:47,037 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:54:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:47,037 INFO L85 PathProgramCache]: Analyzing trace with hash -773126277, now seen corresponding path program 14 times [2022-11-02 20:54:47,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:47,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618883481] [2022-11-02 20:54:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:47,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:47,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:47,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618883481] [2022-11-02 20:54:47,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618883481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:47,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903436099] [2022-11-02 20:54:47,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:54:47,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:47,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:47,293 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:47,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:54:47,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:54:47,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:47,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:54:47,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:47,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:47,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903436099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:47,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:47,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-11-02 20:54:47,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450578787] [2022-11-02 20:54:47,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:47,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:54:47,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:47,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:54:47,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:54:47,949 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:54:47,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 2216 transitions, 55280 flow. Second operand has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:47,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:47,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:54:47,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:59,738 INFO L130 PetriNetUnfolder]: 2988/9291 cut-off events. [2022-11-02 20:54:59,738 INFO L131 PetriNetUnfolder]: For 345490/345490 co-relation queries the response was YES. [2022-11-02 20:54:59,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92178 conditions, 9291 events. 2988/9291 cut-off events. For 345490/345490 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 98854 event pairs, 173 based on Foata normal form. 151/9401 useless extension candidates. Maximal degree in co-relation 92015. Up to 3203 conditions per place. [2022-11-02 20:55:00,026 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1193 selfloop transitions, 1454 changer transitions 5/2697 dead transitions. [2022-11-02 20:55:00,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 2697 transitions, 72483 flow [2022-11-02 20:55:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:55:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-02 20:55:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2072 transitions. [2022-11-02 20:55:00,030 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7657058388765706 [2022-11-02 20:55:00,030 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2072 transitions. [2022-11-02 20:55:00,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2072 transitions. [2022-11-02 20:55:00,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:55:00,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2072 transitions. [2022-11-02 20:55:00,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 62.78787878787879) internal successors, (2072), 33 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:00,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 82.0) internal successors, (2788), 34 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:00,042 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 82.0) internal successors, (2788), 34 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:00,043 INFO L175 Difference]: Start difference. First operand has 588 places, 2216 transitions, 55280 flow. Second operand 33 states and 2072 transitions. [2022-11-02 20:55:00,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 2697 transitions, 72483 flow [2022-11-02 20:55:06,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 2697 transitions, 71968 flow, removed 141 selfloop flow, removed 24 redundant places. [2022-11-02 20:55:06,646 INFO L231 Difference]: Finished difference. Result has 620 places, 2470 transitions, 67545 flow [2022-11-02 20:55:06,649 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=54777, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=931, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=67545, PETRI_PLACES=620, PETRI_TRANSITIONS=2470} [2022-11-02 20:55:06,649 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 548 predicate places. [2022-11-02 20:55:06,649 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 2470 transitions, 67545 flow [2022-11-02 20:55:06,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:06,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:55:06,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:06,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:06,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:55:06,873 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:55:06,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:06,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1371417741, now seen corresponding path program 15 times [2022-11-02 20:55:06,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:06,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857489756] [2022-11-02 20:55:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:06,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:07,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:07,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857489756] [2022-11-02 20:55:07,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857489756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:07,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186716584] [2022-11-02 20:55:07,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:55:07,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:07,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:07,108 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:07,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:55:07,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:55:07,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:07,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:55:07,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:07,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:07,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186716584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:07,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:07,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-02 20:55:07,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399162381] [2022-11-02 20:55:07,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:07,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:55:07,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:07,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:55:07,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:55:07,657 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:55:07,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 2470 transitions, 67545 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:07,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:55:07,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:55:07,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:55:19,658 INFO L130 PetriNetUnfolder]: 2987/9217 cut-off events. [2022-11-02 20:55:19,658 INFO L131 PetriNetUnfolder]: For 434096/434096 co-relation queries the response was YES. [2022-11-02 20:55:19,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101553 conditions, 9217 events. 2987/9217 cut-off events. For 434096/434096 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 97590 event pairs, 137 based on Foata normal form. 1/9190 useless extension candidates. Maximal degree in co-relation 101367. Up to 4303 conditions per place. [2022-11-02 20:55:20,064 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1992 selfloop transitions, 455 changer transitions 5/2497 dead transitions. [2022-11-02 20:55:20,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 2497 transitions, 72984 flow [2022-11-02 20:55:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:55:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:55:20,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1100 transitions. [2022-11-02 20:55:20,066 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7452574525745257 [2022-11-02 20:55:20,066 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1100 transitions. [2022-11-02 20:55:20,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1100 transitions. [2022-11-02 20:55:20,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:55:20,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1100 transitions. [2022-11-02 20:55:20,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.111111111111114) internal successors, (1100), 18 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,069 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,069 INFO L175 Difference]: Start difference. First operand has 620 places, 2470 transitions, 67545 flow. Second operand 18 states and 1100 transitions. [2022-11-02 20:55:20,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 2497 transitions, 72984 flow [2022-11-02 20:55:28,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 2497 transitions, 72191 flow, removed 386 selfloop flow, removed 3 redundant places. [2022-11-02 20:55:28,325 INFO L231 Difference]: Finished difference. Result has 635 places, 2463 transitions, 67522 flow [2022-11-02 20:55:28,327 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=66659, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2011, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=67522, PETRI_PLACES=635, PETRI_TRANSITIONS=2463} [2022-11-02 20:55:28,327 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 563 predicate places. [2022-11-02 20:55:28,328 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 2463 transitions, 67522 flow [2022-11-02 20:55:28,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:28,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:55:28,328 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:28,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:28,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:28,529 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:55:28,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:28,529 INFO L85 PathProgramCache]: Analyzing trace with hash 968100109, now seen corresponding path program 16 times [2022-11-02 20:55:28,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:28,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990621432] [2022-11-02 20:55:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:28,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:28,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:28,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990621432] [2022-11-02 20:55:28,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990621432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:28,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780676777] [2022-11-02 20:55:28,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:55:28,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:28,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:28,731 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:28,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec597e6-0e86-4e2e-b3a4-b0cc607c99d8/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:55:28,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:55:28,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:28,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:55:28,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:29,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:29,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780676777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:29,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:29,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-02 20:55:29,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420763025] [2022-11-02 20:55:29,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:29,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:55:29,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:29,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:55:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:55:29,187 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-02 20:55:29,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 2463 transitions, 67522 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:29,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:55:29,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-02 20:55:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand