./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:56:04,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:56:04,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:56:05,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:56:05,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:56:05,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:56:05,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:56:05,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:56:05,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:56:05,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:56:05,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:56:05,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:56:05,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:56:05,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:56:05,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:56:05,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:56:05,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:56:05,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:56:05,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:56:05,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:56:05,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:56:05,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:56:05,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:56:05,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:56:05,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:56:05,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:56:05,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:56:05,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:56:05,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:56:05,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:56:05,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:56:05,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:56:05,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:56:05,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:56:05,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:56:05,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:56:05,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:56:05,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:56:05,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:56:05,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:56:05,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:56:05,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 18:56:05,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:56:05,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:56:05,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:56:05,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:56:05,069 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:56:05,069 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:56:05,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:56:05,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:56:05,070 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:56:05,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:56:05,071 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:56:05,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:56:05,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:56:05,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:56:05,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:56:05,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:56:05,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:56:05,072 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:56:05,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:56:05,072 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:56:05,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:56:05,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:56:05,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:56:05,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:56:05,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:56:05,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:56:05,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:56:05,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:56:05,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:56:05,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:56:05,074 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:56:05,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:56:05,074 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:56:05,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:56:05,075 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:56:05,075 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2022-12-13 18:56:05,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:56:05,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:56:05,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:56:05,278 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:56:05,278 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:56:05,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/stack_longest-1.i [2022-12-13 18:56:07,790 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:56:07,983 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:56:07,983 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/sv-benchmarks/c/pthread/stack_longest-1.i [2022-12-13 18:56:07,994 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/data/4e97dcfa5/136bacb407b04ff08445a7fe35073a3a/FLAG9dfa55ac4 [2022-12-13 18:56:08,384 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/data/4e97dcfa5/136bacb407b04ff08445a7fe35073a3a [2022-12-13 18:56:08,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:56:08,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:56:08,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:56:08,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:56:08,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:56:08,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75341a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08, skipping insertion in model container [2022-12-13 18:56:08,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:56:08,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:56:08,749 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-12-13 18:56:08,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:56:08,783 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:56:08,810 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-12-13 18:56:08,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:56:08,853 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:56:08,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08 WrapperNode [2022-12-13 18:56:08,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:56:08,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:56:08,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:56:08,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:56:08,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,891 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-12-13 18:56:08,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:56:08,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:56:08,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:56:08,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:56:08,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,912 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:56:08,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:56:08,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:56:08,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:56:08,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (1/1) ... [2022-12-13 18:56:08,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:56:08,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:08,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:56:08,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:56:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 18:56:08,977 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 18:56:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 18:56:08,977 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 18:56:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:56:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:56:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:56:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:56:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 18:56:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:56:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:56:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:56:08,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:56:08,980 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:56:09,088 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:56:09,090 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:56:09,291 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:56:09,298 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:56:09,299 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 18:56:09,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:56:09 BoogieIcfgContainer [2022-12-13 18:56:09,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:56:09,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:56:09,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:56:09,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:56:09,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:56:08" (1/3) ... [2022-12-13 18:56:09,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63cf7052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:56:09, skipping insertion in model container [2022-12-13 18:56:09,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:56:08" (2/3) ... [2022-12-13 18:56:09,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63cf7052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:56:09, skipping insertion in model container [2022-12-13 18:56:09,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:56:09" (3/3) ... [2022-12-13 18:56:09,309 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2022-12-13 18:56:09,316 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 18:56:09,325 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:56:09,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 18:56:09,325 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:56:09,399 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 18:56:09,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 179 transitions, 374 flow [2022-12-13 18:56:09,482 INFO L130 PetriNetUnfolder]: 10/177 cut-off events. [2022-12-13 18:56:09,483 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:56:09,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 10/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 438 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-12-13 18:56:09,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 179 transitions, 374 flow [2022-12-13 18:56:09,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 167 transitions, 343 flow [2022-12-13 18:56:09,494 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:56:09,502 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 167 transitions, 343 flow [2022-12-13 18:56:09,504 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 167 transitions, 343 flow [2022-12-13 18:56:09,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 167 transitions, 343 flow [2022-12-13 18:56:09,543 INFO L130 PetriNetUnfolder]: 10/167 cut-off events. [2022-12-13 18:56:09,543 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 18:56:09,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 167 events. 10/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 348 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-12-13 18:56:09,548 INFO L119 LiptonReduction]: Number of co-enabled transitions 9552 [2022-12-13 18:56:12,546 INFO L134 LiptonReduction]: Checked pairs total: 11508 [2022-12-13 18:56:12,547 INFO L136 LiptonReduction]: Total number of compositions: 157 [2022-12-13 18:56:12,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:56:12,568 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7771904c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:56:12,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 18:56:12,572 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2022-12-13 18:56:12,572 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 18:56:12,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:12,573 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:56:12,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 18:56:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:12,578 INFO L85 PathProgramCache]: Analyzing trace with hash -233345335, now seen corresponding path program 1 times [2022-12-13 18:56:12,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:12,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026635747] [2022-12-13 18:56:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:12,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:12,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:12,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026635747] [2022-12-13 18:56:12,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026635747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:12,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:12,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:56:12,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648247214] [2022-12-13 18:56:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:12,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:56:12,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:12,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:56:12,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:56:12,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 336 [2022-12-13 18:56:12,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:12,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:12,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 336 [2022-12-13 18:56:12,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:13,023 INFO L130 PetriNetUnfolder]: 773/1284 cut-off events. [2022-12-13 18:56:13,023 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-12-13 18:56:13,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 1284 events. 773/1284 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5428 event pairs, 216 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 2372. Up to 714 conditions per place. [2022-12-13 18:56:13,032 INFO L137 encePairwiseOnDemand]: 331/336 looper letters, 53 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2022-12-13 18:56:13,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 59 transitions, 247 flow [2022-12-13 18:56:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:56:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:56:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2022-12-13 18:56:13,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5456349206349206 [2022-12-13 18:56:13,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2022-12-13 18:56:13,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2022-12-13 18:56:13,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:13,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2022-12-13 18:56:13,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,061 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 550 transitions. [2022-12-13 18:56:13,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 59 transitions, 247 flow [2022-12-13 18:56:13,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 59 transitions, 239 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:56:13,065 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2022-12-13 18:56:13,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2022-12-13 18:56:13,070 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2022-12-13 18:56:13,070 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2022-12-13 18:56:13,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:13,070 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:13,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:56:13,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 18:56:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1207350638, now seen corresponding path program 1 times [2022-12-13 18:56:13,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:13,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542838454] [2022-12-13 18:56:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:13,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:13,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542838454] [2022-12-13 18:56:13,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542838454] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:13,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:13,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:56:13,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176269118] [2022-12-13 18:56:13,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:56:13,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:13,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:56:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:56:13,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 336 [2022-12-13 18:56:13,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:13,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 336 [2022-12-13 18:56:13,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:13,339 INFO L130 PetriNetUnfolder]: 808/1356 cut-off events. [2022-12-13 18:56:13,339 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2022-12-13 18:56:13,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2924 conditions, 1356 events. 808/1356 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5647 event pairs, 355 based on Foata normal form. 20/1174 useless extension candidates. Maximal degree in co-relation 2675. Up to 1082 conditions per place. [2022-12-13 18:56:13,343 INFO L137 encePairwiseOnDemand]: 333/336 looper letters, 46 selfloop transitions, 2 changer transitions 3/53 dead transitions. [2022-12-13 18:56:13,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 243 flow [2022-12-13 18:56:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:56:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:56:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2022-12-13 18:56:13,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2022-12-13 18:56:13,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2022-12-13 18:56:13,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2022-12-13 18:56:13,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:13,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2022-12-13 18:56:13,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,349 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 544 transitions. [2022-12-13 18:56:13,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 243 flow [2022-12-13 18:56:13,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:56:13,351 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2022-12-13 18:56:13,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2022-12-13 18:56:13,351 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2022-12-13 18:56:13,351 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2022-12-13 18:56:13,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:13,352 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:13,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:56:13,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 18:56:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash -557913914, now seen corresponding path program 1 times [2022-12-13 18:56:13,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:13,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706611902] [2022-12-13 18:56:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:13,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:13,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:13,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706611902] [2022-12-13 18:56:13,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706611902] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:13,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:13,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:56:13,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919855734] [2022-12-13 18:56:13,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:13,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:56:13,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:56:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:56:13,426 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 336 [2022-12-13 18:56:13,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:13,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 336 [2022-12-13 18:56:13,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:13,585 INFO L130 PetriNetUnfolder]: 861/1440 cut-off events. [2022-12-13 18:56:13,586 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2022-12-13 18:56:13,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 1440 events. 861/1440 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6127 event pairs, 584 based on Foata normal form. 50/1332 useless extension candidates. Maximal degree in co-relation 2922. Up to 1258 conditions per place. [2022-12-13 18:56:13,598 INFO L137 encePairwiseOnDemand]: 333/336 looper letters, 50 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2022-12-13 18:56:13,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 264 flow [2022-12-13 18:56:13,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:56:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:56:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-12-13 18:56:13,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5367063492063492 [2022-12-13 18:56:13,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-12-13 18:56:13,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-12-13 18:56:13,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:13,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-12-13 18:56:13,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,602 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 541 transitions. [2022-12-13 18:56:13,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 264 flow [2022-12-13 18:56:13,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:13,604 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2022-12-13 18:56:13,604 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-12-13 18:56:13,604 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2022-12-13 18:56:13,604 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2022-12-13 18:56:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:13,605 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:13,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:56:13,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 18:56:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash 587254828, now seen corresponding path program 1 times [2022-12-13 18:56:13,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:13,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408985147] [2022-12-13 18:56:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:13,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:13,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:13,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408985147] [2022-12-13 18:56:13,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408985147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:13,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970104312] [2022-12-13 18:56:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:13,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:13,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:13,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:13,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:56:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:13,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:56:13,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:13,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:56:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:13,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970104312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:56:13,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:56:13,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-13 18:56:13,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474579952] [2022-12-13 18:56:13,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:56:13,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:56:13,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:13,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:56:13,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:56:13,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 336 [2022-12-13 18:56:13,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 164.6) internal successors, (1646), 10 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:13,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:13,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 336 [2022-12-13 18:56:13,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:14,386 INFO L130 PetriNetUnfolder]: 1815/2998 cut-off events. [2022-12-13 18:56:14,386 INFO L131 PetriNetUnfolder]: For 1081/1081 co-relation queries the response was YES. [2022-12-13 18:56:14,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7071 conditions, 2998 events. 1815/2998 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14158 event pairs, 349 based on Foata normal form. 48/2734 useless extension candidates. Maximal degree in co-relation 6600. Up to 844 conditions per place. [2022-12-13 18:56:14,401 INFO L137 encePairwiseOnDemand]: 330/336 looper letters, 164 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2022-12-13 18:56:14,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 187 transitions, 900 flow [2022-12-13 18:56:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:56:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 18:56:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1795 transitions. [2022-12-13 18:56:14,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5342261904761905 [2022-12-13 18:56:14,407 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1795 transitions. [2022-12-13 18:56:14,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1795 transitions. [2022-12-13 18:56:14,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:14,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1795 transitions. [2022-12-13 18:56:14,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 179.5) internal successors, (1795), 10 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:14,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 336.0) internal successors, (3696), 11 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:14,420 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 336.0) internal successors, (3696), 11 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:14,420 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1795 transitions. [2022-12-13 18:56:14,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 187 transitions, 900 flow [2022-12-13 18:56:14,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 187 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:14,428 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2022-12-13 18:56:14,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2022-12-13 18:56:14,428 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2022-12-13 18:56:14,429 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2022-12-13 18:56:14,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.6) internal successors, (1646), 10 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:14,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:14,430 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:14,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:56:14,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:14,631 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 18:56:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1577701707, now seen corresponding path program 1 times [2022-12-13 18:56:14,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:14,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481412050] [2022-12-13 18:56:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:14,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:14,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:14,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481412050] [2022-12-13 18:56:14,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481412050] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:14,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:14,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:56:14,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449766271] [2022-12-13 18:56:14,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:14,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:56:14,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:56:14,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:56:14,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 336 [2022-12-13 18:56:14,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:14,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:14,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 336 [2022-12-13 18:56:14,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:14,865 INFO L130 PetriNetUnfolder]: 573/1102 cut-off events. [2022-12-13 18:56:14,865 INFO L131 PetriNetUnfolder]: For 410/410 co-relation queries the response was YES. [2022-12-13 18:56:14,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2672 conditions, 1102 events. 573/1102 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4791 event pairs, 98 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 2202. Up to 785 conditions per place. [2022-12-13 18:56:14,868 INFO L137 encePairwiseOnDemand]: 331/336 looper letters, 46 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2022-12-13 18:56:14,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 329 flow [2022-12-13 18:56:14,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:56:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:56:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2022-12-13 18:56:14,870 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-13 18:56:14,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2022-12-13 18:56:14,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2022-12-13 18:56:14,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:14,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2022-12-13 18:56:14,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:14,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:14,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:14,875 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 528 transitions. [2022-12-13 18:56:14,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 329 flow [2022-12-13 18:56:14,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 317 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:14,877 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2022-12-13 18:56:14,878 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-12-13 18:56:14,878 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2022-12-13 18:56:14,878 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2022-12-13 18:56:14,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:14,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:14,879 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:14,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 18:56:14,879 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 18:56:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash -636707985, now seen corresponding path program 1 times [2022-12-13 18:56:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:14,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742185840] [2022-12-13 18:56:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:14,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:14,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:14,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742185840] [2022-12-13 18:56:14,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742185840] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:14,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:14,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:56:14,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129806037] [2022-12-13 18:56:14,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:14,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:56:14,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:14,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:56:14,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:56:14,977 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 336 [2022-12-13 18:56:14,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:14,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:14,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 336 [2022-12-13 18:56:14,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:15,218 INFO L130 PetriNetUnfolder]: 727/1350 cut-off events. [2022-12-13 18:56:15,218 INFO L131 PetriNetUnfolder]: For 422/422 co-relation queries the response was YES. [2022-12-13 18:56:15,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3420 conditions, 1350 events. 727/1350 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5689 event pairs, 207 based on Foata normal form. 12/1362 useless extension candidates. Maximal degree in co-relation 2802. Up to 529 conditions per place. [2022-12-13 18:56:15,225 INFO L137 encePairwiseOnDemand]: 330/336 looper letters, 80 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2022-12-13 18:56:15,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 92 transitions, 526 flow [2022-12-13 18:56:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:56:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:56:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 889 transitions. [2022-12-13 18:56:15,228 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2022-12-13 18:56:15,228 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 889 transitions. [2022-12-13 18:56:15,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 889 transitions. [2022-12-13 18:56:15,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:15,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 889 transitions. [2022-12-13 18:56:15,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:15,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:15,235 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:15,235 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 5 states and 889 transitions. [2022-12-13 18:56:15,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 92 transitions, 526 flow [2022-12-13 18:56:15,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 513 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:56:15,239 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 258 flow [2022-12-13 18:56:15,239 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2022-12-13 18:56:15,240 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2022-12-13 18:56:15,240 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 258 flow [2022-12-13 18:56:15,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:15,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:15,241 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:15,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:56:15,241 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 18:56:15,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:15,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1406514140, now seen corresponding path program 1 times [2022-12-13 18:56:15,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:15,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859009740] [2022-12-13 18:56:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:15,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:15,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:15,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859009740] [2022-12-13 18:56:15,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859009740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:15,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:15,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 18:56:15,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281745870] [2022-12-13 18:56:15,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:15,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:56:15,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:15,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:56:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:56:16,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 336 [2022-12-13 18:56:16,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 258 flow. Second operand has 10 states, 10 states have (on average 150.1) internal successors, (1501), 10 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:16,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:16,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 336 [2022-12-13 18:56:16,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:16,633 INFO L130 PetriNetUnfolder]: 1018/1929 cut-off events. [2022-12-13 18:56:16,633 INFO L131 PetriNetUnfolder]: For 1341/1341 co-relation queries the response was YES. [2022-12-13 18:56:16,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4879 conditions, 1929 events. 1018/1929 cut-off events. For 1341/1341 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9509 event pairs, 357 based on Foata normal form. 0/1907 useless extension candidates. Maximal degree in co-relation 3038. Up to 1099 conditions per place. [2022-12-13 18:56:16,640 INFO L137 encePairwiseOnDemand]: 327/336 looper letters, 107 selfloop transitions, 10 changer transitions 3/124 dead transitions. [2022-12-13 18:56:16,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 124 transitions, 760 flow [2022-12-13 18:56:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:56:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:56:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1287 transitions. [2022-12-13 18:56:16,643 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47879464285714285 [2022-12-13 18:56:16,643 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1287 transitions. [2022-12-13 18:56:16,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1287 transitions. [2022-12-13 18:56:16,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:16,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1287 transitions. [2022-12-13 18:56:16,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 160.875) internal successors, (1287), 8 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:16,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 336.0) internal successors, (3024), 9 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:16,650 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 336.0) internal successors, (3024), 9 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:16,650 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 258 flow. Second operand 8 states and 1287 transitions. [2022-12-13 18:56:16,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 124 transitions, 760 flow [2022-12-13 18:56:16,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 124 transitions, 742 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 18:56:16,654 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 319 flow [2022-12-13 18:56:16,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=319, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2022-12-13 18:56:16,655 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 29 predicate places. [2022-12-13 18:56:16,655 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 319 flow [2022-12-13 18:56:16,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.1) internal successors, (1501), 10 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:16,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:16,656 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:16,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 18:56:16,657 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 18:56:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash -530282690, now seen corresponding path program 2 times [2022-12-13 18:56:16,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:16,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856308224] [2022-12-13 18:56:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:17,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:17,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856308224] [2022-12-13 18:56:17,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856308224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:17,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:56:17,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 18:56:17,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175799338] [2022-12-13 18:56:17,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:17,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 18:56:17,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:17,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 18:56:17,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:56:17,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 336 [2022-12-13 18:56:17,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 319 flow. Second operand has 10 states, 10 states have (on average 150.1) internal successors, (1501), 10 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:17,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:17,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 336 [2022-12-13 18:56:17,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:18,139 INFO L130 PetriNetUnfolder]: 1316/2485 cut-off events. [2022-12-13 18:56:18,139 INFO L131 PetriNetUnfolder]: For 1668/1668 co-relation queries the response was YES. [2022-12-13 18:56:18,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6650 conditions, 2485 events. 1316/2485 cut-off events. For 1668/1668 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12750 event pairs, 340 based on Foata normal form. 0/2456 useless extension candidates. Maximal degree in co-relation 4330. Up to 1034 conditions per place. [2022-12-13 18:56:18,147 INFO L137 encePairwiseOnDemand]: 328/336 looper letters, 107 selfloop transitions, 14 changer transitions 3/128 dead transitions. [2022-12-13 18:56:18,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 128 transitions, 837 flow [2022-12-13 18:56:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:56:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:56:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1287 transitions. [2022-12-13 18:56:18,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47879464285714285 [2022-12-13 18:56:18,150 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1287 transitions. [2022-12-13 18:56:18,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1287 transitions. [2022-12-13 18:56:18,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:18,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1287 transitions. [2022-12-13 18:56:18,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 160.875) internal successors, (1287), 8 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:18,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 336.0) internal successors, (3024), 9 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:18,155 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 336.0) internal successors, (3024), 9 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:18,155 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 319 flow. Second operand 8 states and 1287 transitions. [2022-12-13 18:56:18,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 128 transitions, 837 flow [2022-12-13 18:56:18,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 128 transitions, 837 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:56:18,159 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 397 flow [2022-12-13 18:56:18,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=397, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2022-12-13 18:56:18,159 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 39 predicate places. [2022-12-13 18:56:18,159 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 397 flow [2022-12-13 18:56:18,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.1) internal successors, (1501), 10 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:18,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:18,160 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:18,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 18:56:18,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 18:56:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash -979003524, now seen corresponding path program 1 times [2022-12-13 18:56:18,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:18,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954979361] [2022-12-13 18:56:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:18,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:56:18,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954979361] [2022-12-13 18:56:18,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954979361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474388290] [2022-12-13 18:56:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:18,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:18,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:18,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:18,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:56:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:18,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:56:18,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:56:18,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:56:18,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474388290] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:56:18,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:56:18,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-12-13 18:56:18,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866985175] [2022-12-13 18:56:18,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:56:18,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:56:18,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:56:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:56:18,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 336 [2022-12-13 18:56:18,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 397 flow. Second operand has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:18,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:56:18,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 336 [2022-12-13 18:56:18,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:56:18,792 INFO L130 PetriNetUnfolder]: 1393/2595 cut-off events. [2022-12-13 18:56:18,792 INFO L131 PetriNetUnfolder]: For 2071/2071 co-relation queries the response was YES. [2022-12-13 18:56:18,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7313 conditions, 2595 events. 1393/2595 cut-off events. For 2071/2071 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12919 event pairs, 526 based on Foata normal form. 16/2581 useless extension candidates. Maximal degree in co-relation 5174. Up to 998 conditions per place. [2022-12-13 18:56:18,800 INFO L137 encePairwiseOnDemand]: 329/336 looper letters, 107 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2022-12-13 18:56:18,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 893 flow [2022-12-13 18:56:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:56:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 18:56:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1201 transitions. [2022-12-13 18:56:18,803 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5106292517006803 [2022-12-13 18:56:18,803 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1201 transitions. [2022-12-13 18:56:18,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1201 transitions. [2022-12-13 18:56:18,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:56:18,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1201 transitions. [2022-12-13 18:56:18,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.57142857142858) internal successors, (1201), 7 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:18,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 336.0) internal successors, (2688), 8 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:18,806 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 336.0) internal successors, (2688), 8 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:18,807 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 397 flow. Second operand 7 states and 1201 transitions. [2022-12-13 18:56:18,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 893 flow [2022-12-13 18:56:18,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 124 transitions, 869 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-12-13 18:56:18,812 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 514 flow [2022-12-13 18:56:18,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-12-13 18:56:18,812 INFO L288 CegarLoopForPetriNet]: 35 programPoint places, 44 predicate places. [2022-12-13 18:56:18,812 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 514 flow [2022-12-13 18:56:18,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:56:18,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:56:18,813 INFO L209 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] [2022-12-13 18:56:18,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:56:19,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 18:56:19,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 18:56:19,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1277873091, now seen corresponding path program 1 times [2022-12-13 18:56:19,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682077284] [2022-12-13 18:56:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:19,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:56:19,053 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:56:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:56:19,097 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:56:19,097 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:56:19,098 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-12-13 18:56:19,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-12-13 18:56:19,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-12-13 18:56:19,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 18:56:19,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 18:56:19,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 18:56:19,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 18:56:19,100 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:19,104 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 18:56:19,104 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 18:56:19,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 06:56:19 BasicIcfg [2022-12-13 18:56:19,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 18:56:19,148 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 18:56:19,148 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 18:56:19,148 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 18:56:19,148 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:56:09" (3/4) ... [2022-12-13 18:56:19,150 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 18:56:19,194 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 18:56:19,194 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 18:56:19,195 INFO L158 Benchmark]: Toolchain (without parser) took 10802.30ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 125.4MB in the beginning and 65.5MB in the end (delta: 59.9MB). Peak memory consumption was 95.7MB. Max. memory is 16.1GB. [2022-12-13 18:56:19,195 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 161.5MB. Free memory is still 138.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:56:19,195 INFO L158 Benchmark]: CACSL2BoogieTranslator took 459.64ms. Allocated memory is still 161.5MB. Free memory was 125.4MB in the beginning and 96.0MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-12-13 18:56:19,195 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.62ms. Allocated memory is still 161.5MB. Free memory was 96.0MB in the beginning and 93.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:56:19,195 INFO L158 Benchmark]: Boogie Preprocessor took 23.16ms. Allocated memory is still 161.5MB. Free memory was 93.3MB in the beginning and 91.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:56:19,196 INFO L158 Benchmark]: RCFGBuilder took 385.31ms. Allocated memory is still 161.5MB. Free memory was 91.8MB in the beginning and 74.2MB in the end (delta: 17.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-13 18:56:19,196 INFO L158 Benchmark]: TraceAbstraction took 9843.52ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 73.6MB in the beginning and 75.9MB in the end (delta: -2.4MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. [2022-12-13 18:56:19,196 INFO L158 Benchmark]: Witness Printer took 46.43ms. Allocated memory is still 195.0MB. Free memory was 74.9MB in the beginning and 65.5MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:56:19,197 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 161.5MB. Free memory is still 138.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 459.64ms. Allocated memory is still 161.5MB. Free memory was 125.4MB in the beginning and 96.0MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.62ms. Allocated memory is still 161.5MB. Free memory was 96.0MB in the beginning and 93.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.16ms. Allocated memory is still 161.5MB. Free memory was 93.3MB in the beginning and 91.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 385.31ms. Allocated memory is still 161.5MB. Free memory was 91.8MB in the beginning and 74.2MB in the end (delta: 17.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 9843.52ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 73.6MB in the beginning and 75.9MB in the end (delta: -2.4MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. * Witness Printer took 46.43ms. Allocated memory is still 195.0MB. Free memory was 74.9MB in the beginning and 65.5MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 164 PlacesBefore, 35 PlacesAfterwards, 167 TransitionsBefore, 33 TransitionsAfterwards, 9552 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 100 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 5 ChoiceCompositions, 157 TotalNumberOfCompositions, 11508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8940, independent: 8760, independent conditional: 0, independent unconditional: 8760, dependent: 180, dependent conditional: 0, dependent unconditional: 180, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5446, independent: 5386, independent conditional: 0, independent unconditional: 5386, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8940, independent: 3374, independent conditional: 0, independent unconditional: 3374, dependent: 120, dependent conditional: 0, dependent unconditional: 120, unknown: 5446, unknown conditional: 0, unknown unconditional: 5446] , Statistics on independence cache: Total cache size (in pairs): 174, Positive cache size: 157, Positive conditional cache size: 0, Positive unconditional cache size: 157, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L991] COND TRUE 1 i<(800) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: 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: 1022]: 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: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 288 locations, 6 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: 9.7s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1175 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 998 mSDsluCounter, 501 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 478 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2871 IncrementalHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 23 mSDtfsCounter, 2871 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=514occurred in iteration=9, InterpolantAutomatonStates: 50, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1561 SizeOfPredicates, 3 NumberOfNonLiveVariables, 448 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 7/15 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! [2022-12-13 18:56:19,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c321c7b5-0c9c-401d-bc22-f167106cba4a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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