./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF --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 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:14:50,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:14:50,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:14:50,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:14:50,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:14:50,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:14:50,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:14:50,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:14:50,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:14:50,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:14:50,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:14:50,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:14:50,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:14:50,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:14:50,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:14:50,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:14:50,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:14:50,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:14:50,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:14:50,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:14:50,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:14:50,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:14:50,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:14:50,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:14:50,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:14:50,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:14:50,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:14:50,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:14:50,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:14:50,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:14:50,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:14:50,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:14:50,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:14:50,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:14:50,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:14:50,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:14:50,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:14:50,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:14:50,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:14:50,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:14:50,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:14:50,861 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:14:50,901 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:14:50,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:14:50,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:14:50,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:14:50,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:14:50,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:14:50,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:14:50,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:14:50,911 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:14:50,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:14:50,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:14:50,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:14:50,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:14:50,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:14:50,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:14:50,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:14:50,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:14:50,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:14:50,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:14:50,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:14:50,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:14:50,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:14:50,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:14:50,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:14:50,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:14:50,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:14:50,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:14:50,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:14:50,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:14:50,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:14:50,917 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:14:50,918 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:14:50,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:14:50,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:14:50,918 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_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 [2021-11-20 06:14:51,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:14:51,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:14:51,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:14:51,207 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:14:51,208 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:14:51,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/pthread/triangular-longest-2.i [2021-11-20 06:14:51,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/data/0927e7da9/5cea243e58c2433b96517770f7309e67/FLAGa0e7bf9fe [2021-11-20 06:14:51,825 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:14:51,826 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/sv-benchmarks/c/pthread/triangular-longest-2.i [2021-11-20 06:14:51,844 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/data/0927e7da9/5cea243e58c2433b96517770f7309e67/FLAGa0e7bf9fe [2021-11-20 06:14:52,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/data/0927e7da9/5cea243e58c2433b96517770f7309e67 [2021-11-20 06:14:52,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:14:52,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:14:52,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:14:52,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:14:52,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:14:52,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5776392f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52, skipping insertion in model container [2021-11-20 06:14:52,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:14:52,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:14:52,571 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_1e68265d-f1f8-45d8-a163-3904253f9b6d/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2021-11-20 06:14:52,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:14:52,582 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:14:52,620 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_1e68265d-f1f8-45d8-a163-3904253f9b6d/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2021-11-20 06:14:52,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:14:52,657 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:14:52,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52 WrapperNode [2021-11-20 06:14:52,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:14:52,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:14:52,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:14:52,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:14:52,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,699 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-11-20 06:14:52,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:14:52,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:14:52,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:14:52,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:14:52,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:14:52,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:14:52,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:14:52,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:14:52,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (1/1) ... [2021-11-20 06:14:52,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:14:52,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:52,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:14:52,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:14:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-20 06:14:52,817 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-20 06:14:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-20 06:14:52,817 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-20 06:14:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:14:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-20 06:14:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:14:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:14:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:14:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:14:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-20 06:14:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:14:52,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:14:52,821 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 06:14:52,953 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:14:52,955 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:14:53,097 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:14:53,103 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:14:53,103 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 06:14:53,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:14:53 BoogieIcfgContainer [2021-11-20 06:14:53,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:14:53,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:14:53,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:14:53,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:14:53,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:14:52" (1/3) ... [2021-11-20 06:14:53,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580855b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:14:53, skipping insertion in model container [2021-11-20 06:14:53,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:14:52" (2/3) ... [2021-11-20 06:14:53,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580855b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:14:53, skipping insertion in model container [2021-11-20 06:14:53,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:14:53" (3/3) ... [2021-11-20 06:14:53,133 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-11-20 06:14:53,139 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 06:14:53,139 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:14:53,139 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:14:53,139 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 06:14:53,180 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,180 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,180 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,180 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,180 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,181 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,181 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,181 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,181 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,182 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,182 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,182 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,182 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,183 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,183 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,183 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,183 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,184 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,184 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,184 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,185 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,185 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,185 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,185 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,185 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,186 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,186 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,186 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,187 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,187 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,187 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,187 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,188 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,188 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,188 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,188 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,189 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,189 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,189 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,189 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,190 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,190 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,190 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,190 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,191 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,191 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,191 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,192 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,201 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,201 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,202 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,202 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,202 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,202 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,203 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,203 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,206 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,206 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,207 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,207 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,207 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,207 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,210 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,210 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,210 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,211 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,211 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,211 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:14:53,212 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-20 06:14:53,282 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:14:53,289 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:14:53,290 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 06:14:53,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2021-11-20 06:14:53,344 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-11-20 06:14:53,345 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-20 06:14:53,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2021-11-20 06:14:53,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2021-11-20 06:14:53,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2021-11-20 06:14:53,394 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2021-11-20 06:14:53,395 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-20 06:14:53,395 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:14:53,396 INFO L254 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] [2021-11-20 06:14:53,396 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:14:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2021-11-20 06:14:53,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:53,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104024810] [2021-11-20 06:14:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:53,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:53,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104024810] [2021-11-20 06:14:53,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104024810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:14:53,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:14:53,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:14:53,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394644566] [2021-11-20 06:14:53,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:53,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:14:53,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:14:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:14:54,035 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:14:54,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 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) [2021-11-20 06:14:54,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:14:54,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:14:54,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:14:54,231 INFO L129 PetriNetUnfolder]: 50/247 cut-off events. [2021-11-20 06:14:54,231 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-20 06:14:54,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 247 events. 50/247 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1076 event pairs, 1 based on Foata normal form. 52/277 useless extension candidates. Maximal degree in co-relation 304. Up to 27 conditions per place. [2021-11-20 06:14:54,239 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 14 selfloop transitions, 6 changer transitions 20/85 dead transitions. [2021-11-20 06:14:54,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 240 flow [2021-11-20 06:14:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:14:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-20 06:14:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 491 transitions. [2021-11-20 06:14:54,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8767857142857143 [2021-11-20 06:14:54,257 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 491 transitions. [2021-11-20 06:14:54,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 491 transitions. [2021-11-20 06:14:54,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:14:54,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 491 transitions. [2021-11-20 06:14:54,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 61.375) internal successors, (491), 8 states have internal predecessors, (491), 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) [2021-11-20 06:14:54,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 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) [2021-11-20 06:14:54,278 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 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) [2021-11-20 06:14:54,280 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 8 states and 491 transitions. [2021-11-20 06:14:54,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 240 flow [2021-11-20 06:14:54,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-20 06:14:54,289 INFO L242 Difference]: Finished difference. Result has 80 places, 59 transitions, 164 flow [2021-11-20 06:14:54,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=164, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2021-11-20 06:14:54,295 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 10 predicate places. [2021-11-20 06:14:54,295 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 164 flow [2021-11-20 06:14:54,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 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) [2021-11-20 06:14:54,296 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:14:54,296 INFO L254 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] [2021-11-20 06:14:54,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:14:54,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:14:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:54,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2021-11-20 06:14:54,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:54,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661028941] [2021-11-20 06:14:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:54,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:54,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:54,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661028941] [2021-11-20 06:14:54,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661028941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:14:54,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:14:54,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:14:54,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443805739] [2021-11-20 06:14:54,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:54,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:14:54,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:54,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:14:54,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:14:54,443 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:14:54,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-11-20 06:14:54,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:14:54,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:14:54,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:14:54,669 INFO L129 PetriNetUnfolder]: 43/212 cut-off events. [2021-11-20 06:14:54,670 INFO L130 PetriNetUnfolder]: For 212/229 co-relation queries the response was YES. [2021-11-20 06:14:54,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 212 events. 43/212 cut-off events. For 212/229 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 754 event pairs, 0 based on Foata normal form. 3/194 useless extension candidates. Maximal degree in co-relation 414. Up to 40 conditions per place. [2021-11-20 06:14:54,677 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 22 selfloop transitions, 11 changer transitions 8/86 dead transitions. [2021-11-20 06:14:54,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 86 transitions, 414 flow [2021-11-20 06:14:54,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:14:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-20 06:14:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2021-11-20 06:14:54,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2021-11-20 06:14:54,682 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2021-11-20 06:14:54,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2021-11-20 06:14:54,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:14:54,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2021-11-20 06:14:54,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 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) [2021-11-20 06:14:54,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2021-11-20 06:14:54,710 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2021-11-20 06:14:54,710 INFO L186 Difference]: Start difference. First operand has 80 places, 59 transitions, 164 flow. Second operand 9 states and 530 transitions. [2021-11-20 06:14:54,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 86 transitions, 414 flow [2021-11-20 06:14:54,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 400 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-11-20 06:14:54,723 INFO L242 Difference]: Finished difference. Result has 81 places, 69 transitions, 282 flow [2021-11-20 06:14:54,724 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=282, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2021-11-20 06:14:54,726 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 11 predicate places. [2021-11-20 06:14:54,727 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 282 flow [2021-11-20 06:14:54,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-11-20 06:14:54,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:14:54,729 INFO L254 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] [2021-11-20 06:14:54,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:14:54,729 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:14:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2021-11-20 06:14:54,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135936193] [2021-11-20 06:14:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:54,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:54,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:54,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135936193] [2021-11-20 06:14:54,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135936193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:14:54,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:14:54,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:14:54,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044862894] [2021-11-20 06:14:54,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:54,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:14:54,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:54,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:14:54,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:14:54,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:14:54,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-11-20 06:14:54,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:14:54,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:14:54,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:14:55,097 INFO L129 PetriNetUnfolder]: 37/204 cut-off events. [2021-11-20 06:14:55,097 INFO L130 PetriNetUnfolder]: For 617/659 co-relation queries the response was YES. [2021-11-20 06:14:55,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 204 events. 37/204 cut-off events. For 617/659 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 713 event pairs, 0 based on Foata normal form. 13/198 useless extension candidates. Maximal degree in co-relation 487. Up to 36 conditions per place. [2021-11-20 06:14:55,102 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2021-11-20 06:14:55,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 87 transitions, 552 flow [2021-11-20 06:14:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:14:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-20 06:14:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2021-11-20 06:14:55,112 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2021-11-20 06:14:55,113 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2021-11-20 06:14:55,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2021-11-20 06:14:55,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:14:55,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2021-11-20 06:14:55,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 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) [2021-11-20 06:14:55,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2021-11-20 06:14:55,119 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2021-11-20 06:14:55,120 INFO L186 Difference]: Start difference. First operand has 81 places, 69 transitions, 282 flow. Second operand 9 states and 524 transitions. [2021-11-20 06:14:55,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 87 transitions, 552 flow [2021-11-20 06:14:55,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 87 transitions, 508 flow, removed 22 selfloop flow, removed 3 redundant places. [2021-11-20 06:14:55,135 INFO L242 Difference]: Finished difference. Result has 88 places, 71 transitions, 331 flow [2021-11-20 06:14:55,135 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=331, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2021-11-20 06:14:55,138 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 18 predicate places. [2021-11-20 06:14:55,138 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 331 flow [2021-11-20 06:14:55,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-11-20 06:14:55,139 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:14:55,139 INFO L254 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] [2021-11-20 06:14:55,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:14:55,140 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:14:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash 273435771, now seen corresponding path program 1 times [2021-11-20 06:14:55,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:55,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430820711] [2021-11-20 06:14:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:55,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:55,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:55,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430820711] [2021-11-20 06:14:55,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430820711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:14:55,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:14:55,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:14:55,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786899219] [2021-11-20 06:14:55,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:55,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:14:55,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:14:55,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:14:55,325 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:14:55,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2021-11-20 06:14:55,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:14:55,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:14:55,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:14:55,488 INFO L129 PetriNetUnfolder]: 43/234 cut-off events. [2021-11-20 06:14:55,489 INFO L130 PetriNetUnfolder]: For 891/923 co-relation queries the response was YES. [2021-11-20 06:14:55,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 234 events. 43/234 cut-off events. For 891/923 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 838 event pairs, 1 based on Foata normal form. 10/222 useless extension candidates. Maximal degree in co-relation 609. Up to 42 conditions per place. [2021-11-20 06:14:55,495 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 20 selfloop transitions, 20 changer transitions 8/93 dead transitions. [2021-11-20 06:14:55,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 93 transitions, 685 flow [2021-11-20 06:14:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:14:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-20 06:14:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2021-11-20 06:14:55,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2021-11-20 06:14:55,500 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2021-11-20 06:14:55,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2021-11-20 06:14:55,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:14:55,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2021-11-20 06:14:55,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 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) [2021-11-20 06:14:55,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 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) [2021-11-20 06:14:55,506 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 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) [2021-11-20 06:14:55,507 INFO L186 Difference]: Start difference. First operand has 88 places, 71 transitions, 331 flow. Second operand 11 states and 644 transitions. [2021-11-20 06:14:55,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 93 transitions, 685 flow [2021-11-20 06:14:55,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 588 flow, removed 38 selfloop flow, removed 8 redundant places. [2021-11-20 06:14:55,518 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 416 flow [2021-11-20 06:14:55,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=416, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2021-11-20 06:14:55,520 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 24 predicate places. [2021-11-20 06:14:55,520 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 416 flow [2021-11-20 06:14:55,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2021-11-20 06:14:55,521 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:14:55,521 INFO L254 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] [2021-11-20 06:14:55,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:14:55,521 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:14:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1454977483, now seen corresponding path program 2 times [2021-11-20 06:14:55,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:55,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282740984] [2021-11-20 06:14:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:55,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:55,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:55,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282740984] [2021-11-20 06:14:55,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282740984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:14:55,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:14:55,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:14:55,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769794619] [2021-11-20 06:14:55,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:14:55,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:14:55,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:55,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:14:55,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:14:55,692 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:14:55,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2021-11-20 06:14:55,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:14:55,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:14:55,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:14:55,894 INFO L129 PetriNetUnfolder]: 38/219 cut-off events. [2021-11-20 06:14:55,895 INFO L130 PetriNetUnfolder]: For 1007/1063 co-relation queries the response was YES. [2021-11-20 06:14:55,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 219 events. 38/219 cut-off events. For 1007/1063 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 808 event pairs, 1 based on Foata normal form. 20/218 useless extension candidates. Maximal degree in co-relation 600. Up to 41 conditions per place. [2021-11-20 06:14:55,898 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 18 selfloop transitions, 22 changer transitions 11/96 dead transitions. [2021-11-20 06:14:55,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 786 flow [2021-11-20 06:14:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:14:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-20 06:14:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2021-11-20 06:14:55,903 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2021-11-20 06:14:55,903 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2021-11-20 06:14:55,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2021-11-20 06:14:55,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:14:55,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2021-11-20 06:14:55,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 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) [2021-11-20 06:14:55,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 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) [2021-11-20 06:14:55,910 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 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) [2021-11-20 06:14:55,910 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 416 flow. Second operand 12 states and 696 transitions. [2021-11-20 06:14:55,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 786 flow [2021-11-20 06:14:55,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 96 transitions, 712 flow, removed 21 selfloop flow, removed 7 redundant places. [2021-11-20 06:14:55,920 INFO L242 Difference]: Finished difference. Result has 101 places, 79 transitions, 494 flow [2021-11-20 06:14:55,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=494, PETRI_PLACES=101, PETRI_TRANSITIONS=79} [2021-11-20 06:14:55,924 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 31 predicate places. [2021-11-20 06:14:55,928 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 79 transitions, 494 flow [2021-11-20 06:14:55,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2021-11-20 06:14:55,929 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:14:55,929 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-20 06:14:55,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:14:55,930 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:14:55,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2138322864, now seen corresponding path program 1 times [2021-11-20 06:14:55,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:55,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232828001] [2021-11-20 06:14:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:55,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:56,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:56,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232828001] [2021-11-20 06:14:56,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232828001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115322749] [2021-11-20 06:14:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:56,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:56,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:56,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:56,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:14:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:56,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:14:56,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:56,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:56,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115322749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:56,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:14:56,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-20 06:14:56,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135667694] [2021-11-20 06:14:56,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:56,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:14:56,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:14:56,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:14:56,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:14:56,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 79 transitions, 494 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 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) [2021-11-20 06:14:56,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:14:56,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:14:56,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:14:57,103 INFO L129 PetriNetUnfolder]: 50/302 cut-off events. [2021-11-20 06:14:57,104 INFO L130 PetriNetUnfolder]: For 1818/1870 co-relation queries the response was YES. [2021-11-20 06:14:57,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 302 events. 50/302 cut-off events. For 1818/1870 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1054 event pairs, 0 based on Foata normal form. 24/295 useless extension candidates. Maximal degree in co-relation 887. Up to 59 conditions per place. [2021-11-20 06:14:57,109 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 34 selfloop transitions, 17 changer transitions 20/116 dead transitions. [2021-11-20 06:14:57,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 116 transitions, 1215 flow [2021-11-20 06:14:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:14:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 06:14:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1104 transitions. [2021-11-20 06:14:57,114 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8300751879699249 [2021-11-20 06:14:57,114 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1104 transitions. [2021-11-20 06:14:57,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1104 transitions. [2021-11-20 06:14:57,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:14:57,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1104 transitions. [2021-11-20 06:14:57,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 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) [2021-11-20 06:14:57,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 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) [2021-11-20 06:14:57,123 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 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) [2021-11-20 06:14:57,124 INFO L186 Difference]: Start difference. First operand has 101 places, 79 transitions, 494 flow. Second operand 19 states and 1104 transitions. [2021-11-20 06:14:57,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 116 transitions, 1215 flow [2021-11-20 06:14:57,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 116 transitions, 1089 flow, removed 42 selfloop flow, removed 10 redundant places. [2021-11-20 06:14:57,135 INFO L242 Difference]: Finished difference. Result has 119 places, 85 transitions, 598 flow [2021-11-20 06:14:57,136 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=598, PETRI_PLACES=119, PETRI_TRANSITIONS=85} [2021-11-20 06:14:57,137 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 49 predicate places. [2021-11-20 06:14:57,137 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 85 transitions, 598 flow [2021-11-20 06:14:57,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 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) [2021-11-20 06:14:57,137 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:14:57,138 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-20 06:14:57,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:57,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:14:57,357 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:14:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2088183908, now seen corresponding path program 2 times [2021-11-20 06:14:57,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:57,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601309438] [2021-11-20 06:14:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:57,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:57,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:57,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601309438] [2021-11-20 06:14:57,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601309438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18990709] [2021-11-20 06:14:57,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:14:57,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:57,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:57,450 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:57,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:14:57,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:14:57,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:14:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:14:57,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:57,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:57,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18990709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:57,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:14:57,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-20 06:14:57,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563113901] [2021-11-20 06:14:57,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:57,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:14:57,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:57,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:14:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:14:57,897 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:14:57,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 85 transitions, 598 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 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) [2021-11-20 06:14:57,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:14:57,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:14:57,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:14:58,381 INFO L129 PetriNetUnfolder]: 79/443 cut-off events. [2021-11-20 06:14:58,381 INFO L130 PetriNetUnfolder]: For 7219/7347 co-relation queries the response was YES. [2021-11-20 06:14:58,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 443 events. 79/443 cut-off events. For 7219/7347 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2069 event pairs, 0 based on Foata normal form. 27/427 useless extension candidates. Maximal degree in co-relation 1864. Up to 99 conditions per place. [2021-11-20 06:14:58,390 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 30 selfloop transitions, 48 changer transitions 23/146 dead transitions. [2021-11-20 06:14:58,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 146 transitions, 2267 flow [2021-11-20 06:14:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:14:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-20 06:14:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1626 transitions. [2021-11-20 06:14:58,397 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8295918367346938 [2021-11-20 06:14:58,397 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1626 transitions. [2021-11-20 06:14:58,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1626 transitions. [2021-11-20 06:14:58,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:14:58,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1626 transitions. [2021-11-20 06:14:58,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 58.07142857142857) internal successors, (1626), 28 states have internal predecessors, (1626), 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) [2021-11-20 06:14:58,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 70.0) internal successors, (2030), 29 states have internal predecessors, (2030), 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) [2021-11-20 06:14:58,411 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 70.0) internal successors, (2030), 29 states have internal predecessors, (2030), 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) [2021-11-20 06:14:58,411 INFO L186 Difference]: Start difference. First operand has 119 places, 85 transitions, 598 flow. Second operand 28 states and 1626 transitions. [2021-11-20 06:14:58,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 146 transitions, 2267 flow [2021-11-20 06:14:58,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 146 transitions, 1797 flow, removed 224 selfloop flow, removed 12 redundant places. [2021-11-20 06:14:58,436 INFO L242 Difference]: Finished difference. Result has 148 places, 105 transitions, 1045 flow [2021-11-20 06:14:58,436 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1045, PETRI_PLACES=148, PETRI_TRANSITIONS=105} [2021-11-20 06:14:58,437 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 78 predicate places. [2021-11-20 06:14:58,437 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 105 transitions, 1045 flow [2021-11-20 06:14:58,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 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) [2021-11-20 06:14:58,437 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:14:58,438 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:58,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:58,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:14:58,653 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:14:58,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:58,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1879270176, now seen corresponding path program 1 times [2021-11-20 06:14:58,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:58,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489835510] [2021-11-20 06:14:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:58,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:58,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:58,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489835510] [2021-11-20 06:14:58,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489835510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:58,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333863115] [2021-11-20 06:14:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:58,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:58,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:58,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:58,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:14:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:58,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:14:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:59,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:59,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333863115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:59,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:14:59,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-11-20 06:14:59,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652279794] [2021-11-20 06:14:59,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:59,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:14:59,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:59,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:14:59,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:14:59,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:14:59,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 105 transitions, 1045 flow. Second operand has 16 states, 16 states have (on average 56.5625) internal successors, (905), 16 states have internal predecessors, (905), 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) [2021-11-20 06:14:59,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:14:59,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:14:59,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:14:59,965 INFO L129 PetriNetUnfolder]: 99/546 cut-off events. [2021-11-20 06:14:59,965 INFO L130 PetriNetUnfolder]: For 18427/18707 co-relation queries the response was YES. [2021-11-20 06:14:59,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 546 events. 99/546 cut-off events. For 18427/18707 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3025 event pairs, 2 based on Foata normal form. 31/523 useless extension candidates. Maximal degree in co-relation 3084. Up to 135 conditions per place. [2021-11-20 06:14:59,979 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 32 selfloop transitions, 65 changer transitions 23/165 dead transitions. [2021-11-20 06:14:59,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 165 transitions, 3448 flow [2021-11-20 06:14:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:14:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-20 06:14:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1679 transitions. [2021-11-20 06:14:59,985 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8270935960591133 [2021-11-20 06:14:59,986 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1679 transitions. [2021-11-20 06:14:59,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1679 transitions. [2021-11-20 06:14:59,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:14:59,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1679 transitions. [2021-11-20 06:14:59,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 57.89655172413793) internal successors, (1679), 29 states have internal predecessors, (1679), 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) [2021-11-20 06:14:59,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 70.0) internal successors, (2100), 30 states have internal predecessors, (2100), 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) [2021-11-20 06:14:59,999 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 70.0) internal successors, (2100), 30 states have internal predecessors, (2100), 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) [2021-11-20 06:14:59,999 INFO L186 Difference]: Start difference. First operand has 148 places, 105 transitions, 1045 flow. Second operand 29 states and 1679 transitions. [2021-11-20 06:14:59,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 165 transitions, 3448 flow [2021-11-20 06:15:00,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 165 transitions, 2887 flow, removed 274 selfloop flow, removed 10 redundant places. [2021-11-20 06:15:00,045 INFO L242 Difference]: Finished difference. Result has 176 places, 127 transitions, 1611 flow [2021-11-20 06:15:00,045 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1611, PETRI_PLACES=176, PETRI_TRANSITIONS=127} [2021-11-20 06:15:00,046 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 106 predicate places. [2021-11-20 06:15:00,046 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 127 transitions, 1611 flow [2021-11-20 06:15:00,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.5625) internal successors, (905), 16 states have internal predecessors, (905), 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) [2021-11-20 06:15:00,047 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:15:00,047 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-11-20 06:15:00,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:00,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:00,261 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:15:00,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:00,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1375112713, now seen corresponding path program 2 times [2021-11-20 06:15:00,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:00,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907060909] [2021-11-20 06:15:00,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:00,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:00,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:00,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907060909] [2021-11-20 06:15:00,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907060909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:00,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110302789] [2021-11-20 06:15:00,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:15:00,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:00,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:00,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:00,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:15:00,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:15:00,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:00,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:15:00,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:00,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:00,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110302789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:00,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:15:00,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-11-20 06:15:00,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626064918] [2021-11-20 06:15:00,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:00,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:15:00,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:15:00,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:15:00,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:15:00,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 127 transitions, 1611 flow. Second operand has 17 states, 17 states have (on average 56.529411764705884) internal successors, (961), 17 states have internal predecessors, (961), 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) [2021-11-20 06:15:00,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:15:00,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:15:00,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:15:01,645 INFO L129 PetriNetUnfolder]: 134/776 cut-off events. [2021-11-20 06:15:01,645 INFO L130 PetriNetUnfolder]: For 44131/44406 co-relation queries the response was YES. [2021-11-20 06:15:01,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5280 conditions, 776 events. 134/776 cut-off events. For 44131/44406 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4850 event pairs, 0 based on Foata normal form. 49/751 useless extension candidates. Maximal degree in co-relation 5187. Up to 188 conditions per place. [2021-11-20 06:15:01,666 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 44 selfloop transitions, 106 changer transitions 29/224 dead transitions. [2021-11-20 06:15:01,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 224 transitions, 6091 flow [2021-11-20 06:15:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:15:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-20 06:15:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2021-11-20 06:15:01,671 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2021-11-20 06:15:01,672 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2021-11-20 06:15:01,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2021-11-20 06:15:01,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:15:01,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2021-11-20 06:15:01,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.916666666666664) internal successors, (2085), 36 states have internal predecessors, (2085), 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) [2021-11-20 06:15:01,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 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) [2021-11-20 06:15:01,685 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 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) [2021-11-20 06:15:01,685 INFO L186 Difference]: Start difference. First operand has 176 places, 127 transitions, 1611 flow. Second operand 36 states and 2085 transitions. [2021-11-20 06:15:01,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 224 transitions, 6091 flow [2021-11-20 06:15:01,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 224 transitions, 4843 flow, removed 595 selfloop flow, removed 17 redundant places. [2021-11-20 06:15:01,824 INFO L242 Difference]: Finished difference. Result has 208 places, 169 transitions, 2627 flow [2021-11-20 06:15:01,825 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2627, PETRI_PLACES=208, PETRI_TRANSITIONS=169} [2021-11-20 06:15:01,826 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 138 predicate places. [2021-11-20 06:15:01,826 INFO L470 AbstractCegarLoop]: Abstraction has has 208 places, 169 transitions, 2627 flow [2021-11-20 06:15:01,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.529411764705884) internal successors, (961), 17 states have internal predecessors, (961), 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) [2021-11-20 06:15:01,827 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:15:01,827 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 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] [2021-11-20 06:15:01,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 06:15:02,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:02,041 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:15:02,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:02,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1020208377, now seen corresponding path program 3 times [2021-11-20 06:15:02,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:02,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286957894] [2021-11-20 06:15:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:02,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:02,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286957894] [2021-11-20 06:15:02,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286957894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288993196] [2021-11-20 06:15:02,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:15:02,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:02,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:02,189 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:02,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:15:02,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:15:02,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:02,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:15:02,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:02,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:02,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288993196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:02,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:15:02,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2021-11-20 06:15:02,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426211660] [2021-11-20 06:15:02,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:02,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:15:02,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:02,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:15:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:15:02,749 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:15:02,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 169 transitions, 2627 flow. Second operand has 21 states, 21 states have (on average 56.476190476190474) internal successors, (1186), 21 states have internal predecessors, (1186), 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) [2021-11-20 06:15:02,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:15:02,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:15:02,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:15:04,071 INFO L129 PetriNetUnfolder]: 216/1345 cut-off events. [2021-11-20 06:15:04,071 INFO L130 PetriNetUnfolder]: For 99011/99308 co-relation queries the response was YES. [2021-11-20 06:15:04,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9841 conditions, 1345 events. 216/1345 cut-off events. For 99011/99308 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 9433 event pairs, 0 based on Foata normal form. 54/1263 useless extension candidates. Maximal degree in co-relation 9734. Up to 298 conditions per place. [2021-11-20 06:15:04,115 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 180 changer transitions 26/309 dead transitions. [2021-11-20 06:15:04,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 309 transitions, 9989 flow [2021-11-20 06:15:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 06:15:04,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-20 06:15:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2431 transitions. [2021-11-20 06:15:04,121 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8268707482993197 [2021-11-20 06:15:04,121 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2431 transitions. [2021-11-20 06:15:04,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2431 transitions. [2021-11-20 06:15:04,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:15:04,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2431 transitions. [2021-11-20 06:15:04,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.88095238095238) internal successors, (2431), 42 states have internal predecessors, (2431), 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) [2021-11-20 06:15:04,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 70.0) internal successors, (3010), 43 states have internal predecessors, (3010), 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) [2021-11-20 06:15:04,138 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 70.0) internal successors, (3010), 43 states have internal predecessors, (3010), 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) [2021-11-20 06:15:04,138 INFO L186 Difference]: Start difference. First operand has 208 places, 169 transitions, 2627 flow. Second operand 42 states and 2431 transitions. [2021-11-20 06:15:04,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 309 transitions, 9989 flow [2021-11-20 06:15:04,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 309 transitions, 7654 flow, removed 1134 selfloop flow, removed 24 redundant places. [2021-11-20 06:15:04,409 INFO L242 Difference]: Finished difference. Result has 241 places, 251 transitions, 4668 flow [2021-11-20 06:15:04,411 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4668, PETRI_PLACES=241, PETRI_TRANSITIONS=251} [2021-11-20 06:15:04,411 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 171 predicate places. [2021-11-20 06:15:04,412 INFO L470 AbstractCegarLoop]: Abstraction has has 241 places, 251 transitions, 4668 flow [2021-11-20 06:15:04,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.476190476190474) internal successors, (1186), 21 states have internal predecessors, (1186), 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) [2021-11-20 06:15:04,413 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:15:04,413 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:04,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:04,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:15:04,633 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:15:04,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1794679756, now seen corresponding path program 4 times [2021-11-20 06:15:04,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:04,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958824701] [2021-11-20 06:15:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:04,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:04,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:04,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958824701] [2021-11-20 06:15:04,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958824701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:04,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77719690] [2021-11-20 06:15:04,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:15:04,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:04,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:04,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:04,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:15:05,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:15:05,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:05,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:15:05,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:05,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:06,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77719690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:06,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:15:06,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2021-11-20 06:15:06,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309801852] [2021-11-20 06:15:06,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:06,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 06:15:06,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:06,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 06:15:06,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:15:06,257 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:15:06,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 251 transitions, 4668 flow. Second operand has 33 states, 33 states have (on average 56.303030303030305) internal successors, (1858), 33 states have internal predecessors, (1858), 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) [2021-11-20 06:15:06,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:15:06,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:15:06,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:15:07,894 INFO L129 PetriNetUnfolder]: 258/1694 cut-off events. [2021-11-20 06:15:07,895 INFO L130 PetriNetUnfolder]: For 168547/168807 co-relation queries the response was YES. [2021-11-20 06:15:07,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13374 conditions, 1694 events. 258/1694 cut-off events. For 168547/168807 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 11095 event pairs, 0 based on Foata normal form. 37/1548 useless extension candidates. Maximal degree in co-relation 13254. Up to 366 conditions per place. [2021-11-20 06:15:07,953 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 218 selfloop transitions, 45 changer transitions 50/358 dead transitions. [2021-11-20 06:15:07,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 358 transitions, 13268 flow [2021-11-20 06:15:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 06:15:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-11-20 06:15:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2834 transitions. [2021-11-20 06:15:07,964 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8262390670553936 [2021-11-20 06:15:07,964 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2834 transitions. [2021-11-20 06:15:07,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2834 transitions. [2021-11-20 06:15:07,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:15:07,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2834 transitions. [2021-11-20 06:15:07,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.83673469387755) internal successors, (2834), 49 states have internal predecessors, (2834), 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) [2021-11-20 06:15:07,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 70.0) internal successors, (3500), 50 states have internal predecessors, (3500), 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) [2021-11-20 06:15:07,982 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 70.0) internal successors, (3500), 50 states have internal predecessors, (3500), 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) [2021-11-20 06:15:07,983 INFO L186 Difference]: Start difference. First operand has 241 places, 251 transitions, 4668 flow. Second operand 49 states and 2834 transitions. [2021-11-20 06:15:07,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 358 transitions, 13268 flow [2021-11-20 06:15:08,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 358 transitions, 10792 flow, removed 1188 selfloop flow, removed 22 redundant places. [2021-11-20 06:15:08,306 INFO L242 Difference]: Finished difference. Result has 295 places, 277 transitions, 5175 flow [2021-11-20 06:15:08,307 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=5175, PETRI_PLACES=295, PETRI_TRANSITIONS=277} [2021-11-20 06:15:08,308 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 225 predicate places. [2021-11-20 06:15:08,308 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 277 transitions, 5175 flow [2021-11-20 06:15:08,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.303030303030305) internal successors, (1858), 33 states have internal predecessors, (1858), 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) [2021-11-20 06:15:08,320 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:15:08,325 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:08,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:08,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:15:08,526 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:15:08,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1187244966, now seen corresponding path program 5 times [2021-11-20 06:15:08,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:08,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129544937] [2021-11-20 06:15:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:08,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:08,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:08,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129544937] [2021-11-20 06:15:08,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129544937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:08,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108203398] [2021-11-20 06:15:08,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:15:08,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:08,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:08,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:08,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:15:08,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 06:15:08,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:08,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:15:08,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:09,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:10,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108203398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:10,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:15:10,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2021-11-20 06:15:10,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724302849] [2021-11-20 06:15:10,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:10,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 06:15:10,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 06:15:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:15:10,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:15:10,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 277 transitions, 5175 flow. Second operand has 33 states, 33 states have (on average 56.303030303030305) internal successors, (1858), 33 states have internal predecessors, (1858), 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) [2021-11-20 06:15:10,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:15:10,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:15:10,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:15:12,107 INFO L129 PetriNetUnfolder]: 314/2051 cut-off events. [2021-11-20 06:15:12,107 INFO L130 PetriNetUnfolder]: For 305411/306426 co-relation queries the response was YES. [2021-11-20 06:15:12,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18711 conditions, 2051 events. 314/2051 cut-off events. For 305411/306426 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 14828 event pairs, 0 based on Foata normal form. 49/1877 useless extension candidates. Maximal degree in co-relation 18566. Up to 478 conditions per place. [2021-11-20 06:15:12,194 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 178 selfloop transitions, 149 changer transitions 50/422 dead transitions. [2021-11-20 06:15:12,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 422 transitions, 16612 flow [2021-11-20 06:15:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-20 06:15:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-11-20 06:15:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3293 transitions. [2021-11-20 06:15:12,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.82531328320802 [2021-11-20 06:15:12,201 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3293 transitions. [2021-11-20 06:15:12,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3293 transitions. [2021-11-20 06:15:12,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:15:12,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3293 transitions. [2021-11-20 06:15:12,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 57.771929824561404) internal successors, (3293), 57 states have internal predecessors, (3293), 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) [2021-11-20 06:15:12,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 70.0) internal successors, (4060), 58 states have internal predecessors, (4060), 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) [2021-11-20 06:15:12,221 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 70.0) internal successors, (4060), 58 states have internal predecessors, (4060), 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) [2021-11-20 06:15:12,222 INFO L186 Difference]: Start difference. First operand has 295 places, 277 transitions, 5175 flow. Second operand 57 states and 3293 transitions. [2021-11-20 06:15:12,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 422 transitions, 16612 flow [2021-11-20 06:15:12,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 422 transitions, 14329 flow, removed 1123 selfloop flow, removed 28 redundant places. [2021-11-20 06:15:12,902 INFO L242 Difference]: Finished difference. Result has 339 places, 333 transitions, 7020 flow [2021-11-20 06:15:12,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4220, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=7020, PETRI_PLACES=339, PETRI_TRANSITIONS=333} [2021-11-20 06:15:12,904 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 269 predicate places. [2021-11-20 06:15:12,904 INFO L470 AbstractCegarLoop]: Abstraction has has 339 places, 333 transitions, 7020 flow [2021-11-20 06:15:12,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.303030303030305) internal successors, (1858), 33 states have internal predecessors, (1858), 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) [2021-11-20 06:15:12,905 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:15:12,905 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:12,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:13,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:13,133 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:15:13,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:13,134 INFO L85 PathProgramCache]: Analyzing trace with hash 981576336, now seen corresponding path program 6 times [2021-11-20 06:15:13,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:13,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269772450] [2021-11-20 06:15:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:13,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:13,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:13,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269772450] [2021-11-20 06:15:13,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269772450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:13,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244162788] [2021-11-20 06:15:13,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:15:13,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:13,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:13,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:13,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:15:13,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-20 06:15:13,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:15:13,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:13,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:14,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244162788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:14,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:15:14,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2021-11-20 06:15:14,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066010411] [2021-11-20 06:15:14,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:14,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:15:14,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:14,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:15:14,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:15:14,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:15:14,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 333 transitions, 7020 flow. Second operand has 34 states, 34 states have (on average 56.3235294117647) internal successors, (1915), 34 states have internal predecessors, (1915), 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) [2021-11-20 06:15:14,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:15:14,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:15:14,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:15:17,353 INFO L129 PetriNetUnfolder]: 428/3008 cut-off events. [2021-11-20 06:15:17,354 INFO L130 PetriNetUnfolder]: For 592244/593123 co-relation queries the response was YES. [2021-11-20 06:15:17,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29262 conditions, 3008 events. 428/3008 cut-off events. For 592244/593123 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 25222 event pairs, 0 based on Foata normal form. 66/2758 useless extension candidates. Maximal degree in co-relation 29100. Up to 680 conditions per place. [2021-11-20 06:15:17,467 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 81 selfloop transitions, 375 changer transitions 50/551 dead transitions. [2021-11-20 06:15:17,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 551 transitions, 23255 flow [2021-11-20 06:15:17,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-20 06:15:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-11-20 06:15:17,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3699 transitions. [2021-11-20 06:15:17,473 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8256696428571428 [2021-11-20 06:15:17,474 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3699 transitions. [2021-11-20 06:15:17,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3699 transitions. [2021-11-20 06:15:17,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:15:17,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3699 transitions. [2021-11-20 06:15:17,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 57.796875) internal successors, (3699), 64 states have internal predecessors, (3699), 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) [2021-11-20 06:15:17,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 70.0) internal successors, (4550), 65 states have internal predecessors, (4550), 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) [2021-11-20 06:15:17,492 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 70.0) internal successors, (4550), 65 states have internal predecessors, (4550), 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) [2021-11-20 06:15:17,492 INFO L186 Difference]: Start difference. First operand has 339 places, 333 transitions, 7020 flow. Second operand 64 states and 3699 transitions. [2021-11-20 06:15:17,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 551 transitions, 23255 flow [2021-11-20 06:15:19,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 551 transitions, 20265 flow, removed 1460 selfloop flow, removed 32 redundant places. [2021-11-20 06:15:19,246 INFO L242 Difference]: Finished difference. Result has 391 places, 455 transitions, 11124 flow [2021-11-20 06:15:19,247 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=11124, PETRI_PLACES=391, PETRI_TRANSITIONS=455} [2021-11-20 06:15:19,248 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 321 predicate places. [2021-11-20 06:15:19,248 INFO L470 AbstractCegarLoop]: Abstraction has has 391 places, 455 transitions, 11124 flow [2021-11-20 06:15:19,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.3235294117647) internal successors, (1915), 34 states have internal predecessors, (1915), 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) [2021-11-20 06:15:19,249 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:15:19,250 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:19,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 06:15:19,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:15:19,477 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:15:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:19,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1131692604, now seen corresponding path program 7 times [2021-11-20 06:15:19,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:19,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663076315] [2021-11-20 06:15:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:19,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:19,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663076315] [2021-11-20 06:15:19,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663076315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176596680] [2021-11-20 06:15:19,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:15:19,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:19,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:19,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:19,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:15:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:19,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:15:19,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:20,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:15:20,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176596680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:20,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:15:20,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2021-11-20 06:15:20,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110041566] [2021-11-20 06:15:20,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:20,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 06:15:20,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:20,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 06:15:20,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:15:20,638 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:15:20,639 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 455 transitions, 11124 flow. Second operand has 33 states, 33 states have (on average 56.303030303030305) internal successors, (1858), 33 states have internal predecessors, (1858), 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) [2021-11-20 06:15:20,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:15:20,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:15:20,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:15:23,845 INFO L129 PetriNetUnfolder]: 518/3593 cut-off events. [2021-11-20 06:15:23,846 INFO L130 PetriNetUnfolder]: For 999257/1000110 co-relation queries the response was YES. [2021-11-20 06:15:23,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40940 conditions, 3593 events. 518/3593 cut-off events. For 999257/1000110 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 30725 event pairs, 0 based on Foata normal form. 80/3296 useless extension candidates. Maximal degree in co-relation 40756. Up to 812 conditions per place. [2021-11-20 06:15:23,996 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 83 selfloop transitions, 469 changer transitions 53/650 dead transitions. [2021-11-20 06:15:23,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 650 transitions, 33204 flow [2021-11-20 06:15:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-20 06:15:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-11-20 06:15:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4516 transitions. [2021-11-20 06:15:24,005 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.827106227106227 [2021-11-20 06:15:24,005 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4516 transitions. [2021-11-20 06:15:24,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4516 transitions. [2021-11-20 06:15:24,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:15:24,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4516 transitions. [2021-11-20 06:15:24,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 57.8974358974359) internal successors, (4516), 78 states have internal predecessors, (4516), 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) [2021-11-20 06:15:24,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 70.0) internal successors, (5530), 79 states have internal predecessors, (5530), 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) [2021-11-20 06:15:24,029 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 70.0) internal successors, (5530), 79 states have internal predecessors, (5530), 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) [2021-11-20 06:15:24,029 INFO L186 Difference]: Start difference. First operand has 391 places, 455 transitions, 11124 flow. Second operand 78 states and 4516 transitions. [2021-11-20 06:15:24,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 650 transitions, 33204 flow [2021-11-20 06:15:26,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 650 transitions, 26037 flow, removed 3538 selfloop flow, removed 32 redundant places. [2021-11-20 06:15:26,412 INFO L242 Difference]: Finished difference. Result has 468 places, 536 transitions, 14665 flow [2021-11-20 06:15:26,413 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8955, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=14665, PETRI_PLACES=468, PETRI_TRANSITIONS=536} [2021-11-20 06:15:26,413 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 398 predicate places. [2021-11-20 06:15:26,414 INFO L470 AbstractCegarLoop]: Abstraction has has 468 places, 536 transitions, 14665 flow [2021-11-20 06:15:26,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.303030303030305) internal successors, (1858), 33 states have internal predecessors, (1858), 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) [2021-11-20 06:15:26,414 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:15:26,415 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:26,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:26,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:15:26,629 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:15:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1403383669, now seen corresponding path program 8 times [2021-11-20 06:15:26,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:26,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650050872] [2021-11-20 06:15:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:26,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:26,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:26,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650050872] [2021-11-20 06:15:26,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650050872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:26,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066458886] [2021-11-20 06:15:26,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:15:26,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:26,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:26,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:26,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:15:27,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:15:27,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:15:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:27,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:28,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066458886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:28,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:15:28,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2021-11-20 06:15:28,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124456385] [2021-11-20 06:15:28,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:28,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 06:15:28,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 06:15:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=2051, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 06:15:28,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:15:28,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 536 transitions, 14665 flow. Second operand has 52 states, 52 states have (on average 56.15384615384615) internal successors, (2920), 52 states have internal predecessors, (2920), 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) [2021-11-20 06:15:28,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:15:28,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:15:28,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:15:33,322 INFO L129 PetriNetUnfolder]: 639/4482 cut-off events. [2021-11-20 06:15:33,323 INFO L130 PetriNetUnfolder]: For 1643444/1644441 co-relation queries the response was YES. [2021-11-20 06:15:33,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57435 conditions, 4482 events. 639/4482 cut-off events. For 1643444/1644441 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 37512 event pairs, 1 based on Foata normal form. 104/4113 useless extension candidates. Maximal degree in co-relation 57220. Up to 996 conditions per place. [2021-11-20 06:15:33,547 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 107 selfloop transitions, 588 changer transitions 63/803 dead transitions. [2021-11-20 06:15:33,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 803 transitions, 48501 flow [2021-11-20 06:15:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-20 06:15:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-11-20 06:15:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5722 transitions. [2021-11-20 06:15:33,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8256854256854257 [2021-11-20 06:15:33,557 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5722 transitions. [2021-11-20 06:15:33,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5722 transitions. [2021-11-20 06:15:33,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:15:33,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5722 transitions. [2021-11-20 06:15:33,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 57.7979797979798) internal successors, (5722), 99 states have internal predecessors, (5722), 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) [2021-11-20 06:15:33,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 70.0) internal successors, (7000), 100 states have internal predecessors, (7000), 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) [2021-11-20 06:15:33,586 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 70.0) internal successors, (7000), 100 states have internal predecessors, (7000), 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) [2021-11-20 06:15:33,586 INFO L186 Difference]: Start difference. First operand has 468 places, 536 transitions, 14665 flow. Second operand 99 states and 5722 transitions. [2021-11-20 06:15:33,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 803 transitions, 48501 flow [2021-11-20 06:15:36,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 803 transitions, 37324 flow, removed 5496 selfloop flow, removed 37 redundant places. [2021-11-20 06:15:36,792 INFO L242 Difference]: Finished difference. Result has 564 places, 659 transitions, 18841 flow [2021-11-20 06:15:36,794 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=11250, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=18841, PETRI_PLACES=564, PETRI_TRANSITIONS=659} [2021-11-20 06:15:36,794 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 494 predicate places. [2021-11-20 06:15:36,795 INFO L470 AbstractCegarLoop]: Abstraction has has 564 places, 659 transitions, 18841 flow [2021-11-20 06:15:36,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 56.15384615384615) internal successors, (2920), 52 states have internal predecessors, (2920), 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) [2021-11-20 06:15:36,796 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:15:36,796 INFO L254 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:36,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:37,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:37,009 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:15:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1272435135, now seen corresponding path program 9 times [2021-11-20 06:15:37,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:37,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718026421] [2021-11-20 06:15:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:37,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:37,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:37,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718026421] [2021-11-20 06:15:37,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718026421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:37,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017269580] [2021-11-20 06:15:37,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:15:37,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:37,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:37,800 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:37,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:15:37,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-20 06:15:37,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:37,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 06:15:37,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:38,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:39,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017269580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:39,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:15:39,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 50 [2021-11-20 06:15:39,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536030558] [2021-11-20 06:15:39,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:39,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 06:15:39,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 06:15:39,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1918, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 06:15:39,188 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-20 06:15:39,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 659 transitions, 18841 flow. Second operand has 50 states, 50 states have (on average 56.2) internal successors, (2810), 50 states have internal predecessors, (2810), 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) [2021-11-20 06:15:39,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:15:39,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-20 06:15:39,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:15:44,379 INFO L129 PetriNetUnfolder]: 659/4673 cut-off events. [2021-11-20 06:15:44,379 INFO L130 PetriNetUnfolder]: For 2215807/2216262 co-relation queries the response was YES. [2021-11-20 06:15:44,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63145 conditions, 4673 events. 659/4673 cut-off events. For 2215807/2216262 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 38730 event pairs, 0 based on Foata normal form. 88/4266 useless extension candidates. Maximal degree in co-relation 62894. Up to 1018 conditions per place. [2021-11-20 06:15:44,649 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 112 selfloop transitions, 642 changer transitions 17/816 dead transitions. [2021-11-20 06:15:44,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 816 transitions, 44399 flow [2021-11-20 06:15:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-20 06:15:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-11-20 06:15:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5474 transitions. [2021-11-20 06:15:44,660 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8231578947368421 [2021-11-20 06:15:44,661 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5474 transitions. [2021-11-20 06:15:44,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5474 transitions. [2021-11-20 06:15:44,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:15:44,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5474 transitions. [2021-11-20 06:15:44,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 57.62105263157895) internal successors, (5474), 95 states have internal predecessors, (5474), 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) [2021-11-20 06:15:44,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 70.0) internal successors, (6720), 96 states have internal predecessors, (6720), 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) [2021-11-20 06:15:44,686 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 70.0) internal successors, (6720), 96 states have internal predecessors, (6720), 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) [2021-11-20 06:15:44,687 INFO L186 Difference]: Start difference. First operand has 564 places, 659 transitions, 18841 flow. Second operand 95 states and 5474 transitions. [2021-11-20 06:15:44,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 816 transitions, 44399 flow [2021-11-20 06:15:50,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 816 transitions, 35029 flow, removed 4599 selfloop flow, removed 33 redundant places. [2021-11-20 06:15:50,851 INFO L242 Difference]: Finished difference. Result has 622 places, 711 transitions, 17962 flow [2021-11-20 06:15:50,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=14229, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=17962, PETRI_PLACES=622, PETRI_TRANSITIONS=711} [2021-11-20 06:15:50,852 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 552 predicate places. [2021-11-20 06:15:50,853 INFO L470 AbstractCegarLoop]: Abstraction has has 622 places, 711 transitions, 17962 flow [2021-11-20 06:15:50,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 56.2) internal successors, (2810), 50 states have internal predecessors, (2810), 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) [2021-11-20 06:15:50,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:15:50,854 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:50,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:51,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:51,069 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:15:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:51,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1711043108, now seen corresponding path program 10 times [2021-11-20 06:15:51,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:51,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865149297] [2021-11-20 06:15:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:51,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:15:51,130 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:15:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:15:51,281 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:15:51,281 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:15:51,282 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-11-20 06:15:51,284 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-11-20 06:15:51,285 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-11-20 06:15:51,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:15:51,289 INFO L732 BasicCegarLoop]: Path program histogram: [10, 2, 2, 2, 1] [2021-11-20 06:15:51,294 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-20 06:15:51,295 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:15:51,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:15:51 BasicIcfg [2021-11-20 06:15:51,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:15:51,474 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:15:51,474 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:15:51,474 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:15:51,475 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:14:53" (3/4) ... [2021-11-20 06:15:51,477 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 06:15:51,664 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 06:15:51,664 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:15:51,665 INFO L158 Benchmark]: Toolchain (without parser) took 59527.15ms. Allocated memory was 100.7MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 58.3MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 2.6GB. Max. memory is 16.1GB. [2021-11-20 06:15:51,666 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory is still 76.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:15:51,666 INFO L158 Benchmark]: CACSL2BoogieTranslator took 513.24ms. Allocated memory is still 100.7MB. Free memory was 58.1MB in the beginning and 65.5MB in the end (delta: -7.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 06:15:51,667 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.71ms. Allocated memory is still 100.7MB. Free memory was 65.5MB in the beginning and 63.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:15:51,667 INFO L158 Benchmark]: Boogie Preprocessor took 26.03ms. Allocated memory is still 100.7MB. Free memory was 63.4MB in the beginning and 62.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:15:51,668 INFO L158 Benchmark]: RCFGBuilder took 378.46ms. Allocated memory is still 100.7MB. Free memory was 62.1MB in the beginning and 50.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:15:51,668 INFO L158 Benchmark]: TraceAbstraction took 58365.57ms. Allocated memory was 100.7MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 50.1MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2021-11-20 06:15:51,668 INFO L158 Benchmark]: Witness Printer took 191.06ms. Allocated memory is still 4.2GB. Free memory was 1.6GB in the beginning and 1.5GB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2021-11-20 06:15:51,671 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory is still 76.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 513.24ms. Allocated memory is still 100.7MB. Free memory was 58.1MB in the beginning and 65.5MB in the end (delta: -7.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.71ms. Allocated memory is still 100.7MB. Free memory was 65.5MB in the beginning and 63.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.03ms. Allocated memory is still 100.7MB. Free memory was 63.4MB in the beginning and 62.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 378.46ms. Allocated memory is still 100.7MB. Free memory was 62.1MB in the beginning and 50.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 58365.57ms. Allocated memory was 100.7MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 50.1MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. * Witness Printer took 191.06ms. Allocated memory is still 4.2GB. Free memory was 1.6GB in the beginning and 1.5GB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [\old(argc)=49, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L716] 0 int condI = i >= (2*20 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=1, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=5, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=5, k=7] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=5, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=8, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=9] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=9] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=10] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=10, k=10] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=10] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=10, k=11] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=10, k=11] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=11] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=11] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=11, k=11] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=11, k=12] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=11, k=12] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=11] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=13, k=11] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=11, k=13] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=12, k=13] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=12] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=13] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=13] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=13, k=13] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=13] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=13, k=14] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=13, k=14] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=15, k=13] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=15, k=13] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=15] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=15] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=14] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=14, k=15] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=15] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=15] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=15, k=15] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=15] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=15] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=16] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=16, k=16] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=16] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=16, k=17] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=17] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=17] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=17] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=18] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=17, k=18] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=17, k=19] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=17, k=19] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=19, k=18] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=19] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=18] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=18] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=19] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=19] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L719] 0 int condJ = j >= (2*20 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=19, k=19] [L721] COND TRUE 0 condI || condJ VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=19, k=19] [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=19, k=19] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 58.0s, OverallIterations: 17, TraceHistogramMax: 20, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 40.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1629 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1629 mSDsluCounter, 267 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 384 mSDsCounter, 2066 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3055 IncrementalHoareTripleChecker+Invalid, 5121 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2066 mSolverCounterUnsat, 68 mSDtfsCounter, 3055 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2864 GetRequests, 1999 SyntacticMatches, 1 SemanticMatches, 864 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23438 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18841occurred in iteration=15, InterpolantAutomatonStates: 645, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 12.7s InterpolantComputationTime, 2548 NumberOfCodeBlocks, 2543 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 3335 ConstructedInterpolants, 0 QuantifiedInterpolants, 12395 SizeOfPredicates, 145 NumberOfNonLiveVariables, 2182 ConjunctsInSsa, 204 ConjunctsInUnsatCore, 38 InterpolantComputations, 5 PerfectInterpolantSequences, 75/8622 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 06:15:51,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e68265d-f1f8-45d8-a163-3904253f9b6d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE