./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.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_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- 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 [2022-12-14 09:22:02,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:22:02,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:22:02,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:22:02,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:22:02,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:22:02,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:22:02,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:22:02,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:22:02,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:22:02,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:22:02,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:22:02,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:22:02,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:22:02,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:22:02,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:22:02,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:22:02,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:22:02,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:22:02,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:22:02,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:22:02,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:22:02,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:22:02,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:22:02,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:22:02,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:22:02,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:22:02,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:22:02,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:22:02,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:22:02,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:22:02,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:22:02,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:22:02,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:22:02,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:22:02,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:22:02,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:22:02,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:22:02,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:22:02,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:22:02,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:22:02,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:22:02,748 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:22:02,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:22:02,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:22:02,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:22:02,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:22:02,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:22:02,749 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:22:02,749 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:22:02,749 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:22:02,750 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:22:02,750 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:22:02,750 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:22:02,750 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:22:02,750 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:22:02,750 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:22:02,751 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:22:02,751 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:22:02,751 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:22:02,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:22:02,752 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:22:02,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:22:02,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:22:02,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:22:02,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:22:02,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:22:02,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:22:02,753 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:22:02,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:22:02,753 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:22:02,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:22:02,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:22:02,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:22:02,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:22:02,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:22:02,754 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:22:02,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:22:02,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:22:02,755 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:22:02,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:22:02,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:22:02,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:22:02,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2022-12-14 09:22:02,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:22:02,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:22:02,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:22:02,939 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:22:02,940 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:22:02,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2022-12-14 09:22:05,455 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:22:05,647 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:22:05,647 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2022-12-14 09:22:05,657 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/data/be7a7909a/ceff0807b9b049e7bbe02840c524e9fe/FLAGef7bb8b9e [2022-12-14 09:22:06,038 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/data/be7a7909a/ceff0807b9b049e7bbe02840c524e9fe [2022-12-14 09:22:06,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:22:06,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:22:06,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:22:06,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:22:06,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:22:06,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f139d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06, skipping insertion in model container [2022-12-14 09:22:06,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:22:06,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:22:06,281 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_092b603f-1424-4f54-9327-fd30be498e62/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2022-12-14 09:22:06,289 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_092b603f-1424-4f54-9327-fd30be498e62/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2022-12-14 09:22:06,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:22:06,303 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:22:06,329 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_092b603f-1424-4f54-9327-fd30be498e62/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2022-12-14 09:22:06,331 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_092b603f-1424-4f54-9327-fd30be498e62/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2022-12-14 09:22:06,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:22:06,357 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:22:06,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06 WrapperNode [2022-12-14 09:22:06,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:22:06,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:22:06,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:22:06,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:22:06,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,391 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2022-12-14 09:22:06,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:22:06,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:22:06,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:22:06,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:22:06,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,411 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:22:06,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:22:06,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:22:06,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:22:06,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:22:06,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:06,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:22:06,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:22:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:22:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-14 09:22:06,474 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-14 09:22:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-14 09:22:06,474 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-14 09:22:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:22:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 09:22:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:22:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:22:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:22:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 09:22:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:22:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:22:06,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:22:06,477 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 09:22:06,586 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:22:06,588 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:22:06,792 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:22:06,798 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:22:06,798 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 09:22:06,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:22:06 BoogieIcfgContainer [2022-12-14 09:22:06,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:22:06,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:22:06,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:22:06,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:22:06,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:22:06" (1/3) ... [2022-12-14 09:22:06,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3108ff61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:22:06, skipping insertion in model container [2022-12-14 09:22:06,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (2/3) ... [2022-12-14 09:22:06,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3108ff61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:22:06, skipping insertion in model container [2022-12-14 09:22:06,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:22:06" (3/3) ... [2022-12-14 09:22:06,806 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2022-12-14 09:22:06,812 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 09:22:06,820 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:22:06,820 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 09:22:06,820 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 09:22:06,898 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 09:22:06,928 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 09:22:06,938 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 150 transitions, 316 flow [2022-12-14 09:22:06,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 150 transitions, 316 flow [2022-12-14 09:22:06,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 150 transitions, 316 flow [2022-12-14 09:22:06,981 INFO L130 PetriNetUnfolder]: 10/148 cut-off events. [2022-12-14 09:22:06,982 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 09:22:06,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 148 events. 10/148 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 255 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-12-14 09:22:06,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 4204 [2022-12-14 09:22:20,508 INFO L134 LiptonReduction]: Checked pairs total: 8503 [2022-12-14 09:22:20,508 INFO L136 LiptonReduction]: Total number of compositions: 145 [2022-12-14 09:22:20,513 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 35 transitions, 86 flow [2022-12-14 09:22:20,535 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 196 states, 193 states have (on average 3.05699481865285) internal successors, (590), 195 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:20,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:22:20,551 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=FINITE_AUTOMATA, 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;@36dac245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:22:20,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 09:22:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 196 states, 193 states have (on average 3.05699481865285) internal successors, (590), 195 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:22:20,557 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:20,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:22:20,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:22:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash 18357094, now seen corresponding path program 1 times [2022-12-14 09:22:20,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:20,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162311222] [2022-12-14 09:22:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:20,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:20,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:20,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162311222] [2022-12-14 09:22:20,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162311222] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:20,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:20,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:22:20,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867098173] [2022-12-14 09:22:20,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:20,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 09:22:20,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:20,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 09:22:20,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:22:20,714 INFO L87 Difference]: Start difference. First operand has 196 states, 193 states have (on average 3.05699481865285) internal successors, (590), 195 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:20,766 INFO L93 Difference]: Finished difference Result 176 states and 497 transitions. [2022-12-14 09:22:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 09:22:20,768 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:22:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:20,779 INFO L225 Difference]: With dead ends: 176 [2022-12-14 09:22:20,779 INFO L226 Difference]: Without dead ends: 162 [2022-12-14 09:22:20,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:22:20,783 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:20,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:22:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-12-14 09:22:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-12-14 09:22:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.8447204968944098) internal successors, (458), 161 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 458 transitions. [2022-12-14 09:22:20,820 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 458 transitions. Word has length 4 [2022-12-14 09:22:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:20,821 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 458 transitions. [2022-12-14 09:22:20,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 458 transitions. [2022-12-14 09:22:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 09:22:20,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:20,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:20,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:22:20,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:22:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:20,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1840048120, now seen corresponding path program 1 times [2022-12-14 09:22:20,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:20,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906329828] [2022-12-14 09:22:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:20,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:20,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:20,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906329828] [2022-12-14 09:22:20,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906329828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:20,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:20,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:22:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437691633] [2022-12-14 09:22:20,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:20,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:20,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:20,951 INFO L87 Difference]: Start difference. First operand 162 states and 458 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:21,034 INFO L93 Difference]: Finished difference Result 248 states and 681 transitions. [2022-12-14 09:22:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:21,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 09:22:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:21,038 INFO L225 Difference]: With dead ends: 248 [2022-12-14 09:22:21,038 INFO L226 Difference]: Without dead ends: 226 [2022-12-14 09:22:21,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:21,040 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:21,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 3 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-12-14 09:22:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-12-14 09:22:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.7911111111111113) internal successors, (628), 225 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 628 transitions. [2022-12-14 09:22:21,057 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 628 transitions. Word has length 8 [2022-12-14 09:22:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:21,058 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 628 transitions. [2022-12-14 09:22:21,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 628 transitions. [2022-12-14 09:22:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:22:21,060 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:21,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:21,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:22:21,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:22:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:21,061 INFO L85 PathProgramCache]: Analyzing trace with hash 773754765, now seen corresponding path program 1 times [2022-12-14 09:22:21,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:21,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441757841] [2022-12-14 09:22:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:21,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:21,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441757841] [2022-12-14 09:22:21,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441757841] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:21,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:21,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:22:21,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468223789] [2022-12-14 09:22:21,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:21,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:21,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:21,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:21,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:21,205 INFO L87 Difference]: Start difference. First operand 226 states and 628 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:21,258 INFO L93 Difference]: Finished difference Result 130 states and 297 transitions. [2022-12-14 09:22:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:21,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 09:22:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:21,260 INFO L225 Difference]: With dead ends: 130 [2022-12-14 09:22:21,260 INFO L226 Difference]: Without dead ends: 126 [2022-12-14 09:22:21,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:21,262 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:21,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:22:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-12-14 09:22:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2022-12-14 09:22:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3267326732673266) internal successors, (235), 101 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 235 transitions. [2022-12-14 09:22:21,271 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 235 transitions. Word has length 12 [2022-12-14 09:22:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:21,271 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 235 transitions. [2022-12-14 09:22:21,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 235 transitions. [2022-12-14 09:22:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:22:21,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:21,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:21,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:22:21,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:22:21,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:21,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1067205598, now seen corresponding path program 1 times [2022-12-14 09:22:21,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:21,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342786057] [2022-12-14 09:22:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:21,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:21,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:21,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342786057] [2022-12-14 09:22:21,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342786057] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:21,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:21,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:22:21,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713561302] [2022-12-14 09:22:21,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:21,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:21,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:21,435 INFO L87 Difference]: Start difference. First operand 102 states and 235 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:21,497 INFO L93 Difference]: Finished difference Result 120 states and 272 transitions. [2022-12-14 09:22:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:21,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 09:22:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:21,498 INFO L225 Difference]: With dead ends: 120 [2022-12-14 09:22:21,498 INFO L226 Difference]: Without dead ends: 120 [2022-12-14 09:22:21,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:21,499 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:21,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 4 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-14 09:22:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2022-12-14 09:22:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 260 transitions. [2022-12-14 09:22:21,504 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 260 transitions. Word has length 13 [2022-12-14 09:22:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:21,504 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 260 transitions. [2022-12-14 09:22:21,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 260 transitions. [2022-12-14 09:22:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 09:22:21,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:21,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:21,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:22:21,505 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:22:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:21,505 INFO L85 PathProgramCache]: Analyzing trace with hash -65635495, now seen corresponding path program 1 times [2022-12-14 09:22:21,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:21,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074501286] [2022-12-14 09:22:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:21,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:21,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:22:21,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119556213] [2022-12-14 09:22:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:21,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:21,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:21,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:21,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:22:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:21,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:22:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:21,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:21,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074501286] [2022-12-14 09:22:21,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:22:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119556213] [2022-12-14 09:22:21,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119556213] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:21,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:21,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:22:21,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005148735] [2022-12-14 09:22:21,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:21,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:22:21,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:22:21,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:22:21,859 INFO L87 Difference]: Start difference. First operand 114 states and 260 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:21,963 INFO L93 Difference]: Finished difference Result 178 states and 404 transitions. [2022-12-14 09:22:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:22:21,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 09:22:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:21,964 INFO L225 Difference]: With dead ends: 178 [2022-12-14 09:22:21,964 INFO L226 Difference]: Without dead ends: 178 [2022-12-14 09:22:21,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:22:21,965 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:21,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-14 09:22:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2022-12-14 09:22:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2923976608187133) internal successors, (392), 171 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 392 transitions. [2022-12-14 09:22:21,971 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 392 transitions. Word has length 15 [2022-12-14 09:22:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:21,971 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 392 transitions. [2022-12-14 09:22:21,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 392 transitions. [2022-12-14 09:22:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 09:22:21,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:21,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:21,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:22,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:22,173 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:22:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:22,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2034712985, now seen corresponding path program 1 times [2022-12-14 09:22:22,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:22,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402239050] [2022-12-14 09:22:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:22,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:22,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:22:22,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808123150] [2022-12-14 09:22:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:22,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:22,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:22,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:22,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:22:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:22,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 09:22:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2022-12-14 09:22:22,359 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-14 09:22:22,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 09:22:22,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:22:22,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-12-14 09:22:22,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2022-12-14 09:22:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:22,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:22,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:22,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402239050] [2022-12-14 09:22:22,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:22:22,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808123150] [2022-12-14 09:22:22,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808123150] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:22,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:22,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:22:22,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151732953] [2022-12-14 09:22:22,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:22,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:22:22,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:22:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:22:22,596 INFO L87 Difference]: Start difference. First operand 172 states and 392 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:22,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:22,812 INFO L93 Difference]: Finished difference Result 310 states and 687 transitions. [2022-12-14 09:22:22,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:22:22,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 09:22:22,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:22,813 INFO L225 Difference]: With dead ends: 310 [2022-12-14 09:22:22,813 INFO L226 Difference]: Without dead ends: 298 [2022-12-14 09:22:22,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:22:22,814 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 81 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:22,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 12 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:22:22,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-12-14 09:22:22,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 198. [2022-12-14 09:22:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.263959390862944) internal successors, (446), 197 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 446 transitions. [2022-12-14 09:22:22,821 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 446 transitions. Word has length 16 [2022-12-14 09:22:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:22,821 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 446 transitions. [2022-12-14 09:22:22,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 446 transitions. [2022-12-14 09:22:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 09:22:22,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:22,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:22,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:22:23,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:23,023 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:22:23,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:23,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1757292007, now seen corresponding path program 2 times [2022-12-14 09:22:23,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:23,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670045523] [2022-12-14 09:22:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:23,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:23,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:22:23,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066268225] [2022-12-14 09:22:23,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:22:23,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:23,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:23,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:22:23,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 09:22:23,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:22:23,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 09:22:23,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:23,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2022-12-14 09:22:23,182 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-14 09:22:23,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 09:22:23,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 09:22:23,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-12-14 09:22:23,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2022-12-14 09:22:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:23,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:23,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:23,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670045523] [2022-12-14 09:22:23,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:22:23,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066268225] [2022-12-14 09:22:23,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066268225] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:23,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:23,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:22:23,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121437926] [2022-12-14 09:22:23,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:23,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:22:23,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:22:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:22:23,352 INFO L87 Difference]: Start difference. First operand 198 states and 446 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:23,572 INFO L93 Difference]: Finished difference Result 398 states and 878 transitions. [2022-12-14 09:22:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:22:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 09:22:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:23,574 INFO L225 Difference]: With dead ends: 398 [2022-12-14 09:22:23,574 INFO L226 Difference]: Without dead ends: 386 [2022-12-14 09:22:23,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:22:23,574 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 90 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:23,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 12 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:22:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-12-14 09:22:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 232. [2022-12-14 09:22:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.294372294372294) internal successors, (530), 231 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 530 transitions. [2022-12-14 09:22:23,582 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 530 transitions. Word has length 16 [2022-12-14 09:22:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:23,582 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 530 transitions. [2022-12-14 09:22:23,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 530 transitions. [2022-12-14 09:22:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:22:23,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:23,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:23,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:22:23,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:23,784 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:22:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:23,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1612901151, now seen corresponding path program 1 times [2022-12-14 09:22:23,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:23,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599242836] [2022-12-14 09:22:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:23,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:23,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:22:23,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424658873] [2022-12-14 09:22:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:23,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:23,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:23,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:23,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:22:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:22:24,021 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 09:22:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:22:24,082 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 09:22:24,082 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 09:22:24,083 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-12-14 09:22:24,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-12-14 09:22:24,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-12-14 09:22:24,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-14 09:22:24,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-14 09:22:24,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-14 09:22:24,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:24,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:24,290 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:24,300 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-14 09:22:24,300 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 09:22:24,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 09:22:24 BasicIcfg [2022-12-14 09:22:24,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 09:22:24,350 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 09:22:24,350 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 09:22:24,350 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 09:22:24,350 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:22:06" (3/4) ... [2022-12-14 09:22:24,352 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 09:22:24,384 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 09:22:24,384 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 09:22:24,384 INFO L158 Benchmark]: Toolchain (without parser) took 18340.86ms. Allocated memory is still 151.0MB. Free memory was 116.6MB in the beginning and 33.9MB in the end (delta: 82.7MB). Peak memory consumption was 83.4MB. Max. memory is 16.1GB. [2022-12-14 09:22:24,384 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 113.2MB. Free memory is still 53.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:22:24,384 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.41ms. Allocated memory is still 151.0MB. Free memory was 116.6MB in the beginning and 96.3MB in the end (delta: 20.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-14 09:22:24,385 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.71ms. Allocated memory is still 151.0MB. Free memory was 96.3MB in the beginning and 94.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:22:24,385 INFO L158 Benchmark]: Boogie Preprocessor took 22.13ms. Allocated memory is still 151.0MB. Free memory was 94.2MB in the beginning and 92.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:22:24,385 INFO L158 Benchmark]: RCFGBuilder took 386.13ms. Allocated memory is still 151.0MB. Free memory was 92.2MB in the beginning and 74.6MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-14 09:22:24,385 INFO L158 Benchmark]: TraceAbstraction took 17547.52ms. Allocated memory is still 151.0MB. Free memory was 74.0MB in the beginning and 40.2MB in the end (delta: 33.8MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. [2022-12-14 09:22:24,385 INFO L158 Benchmark]: Witness Printer took 34.13ms. Allocated memory is still 151.0MB. Free memory was 40.2MB in the beginning and 33.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 09:22:24,386 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 113.2MB. Free memory is still 53.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.41ms. Allocated memory is still 151.0MB. Free memory was 116.6MB in the beginning and 96.3MB in the end (delta: 20.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.71ms. Allocated memory is still 151.0MB. Free memory was 96.3MB in the beginning and 94.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.13ms. Allocated memory is still 151.0MB. Free memory was 94.2MB in the beginning and 92.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 386.13ms. Allocated memory is still 151.0MB. Free memory was 92.2MB in the beginning and 74.6MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 17547.52ms. Allocated memory is still 151.0MB. Free memory was 74.0MB in the beginning and 40.2MB in the end (delta: 33.8MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. * Witness Printer took 34.13ms. Allocated memory is still 151.0MB. Free memory was 40.2MB in the beginning and 33.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 13.6s, 147 PlacesBefore, 34 PlacesAfterwards, 150 TransitionsBefore, 35 TransitionsAfterwards, 4204 CoEnabledTransitionPairs, 8 FixpointIterations, 54 TrivialSequentialCompositions, 67 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 2 ChoiceCompositions, 145 TotalNumberOfCompositions, 8503 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5605, independent: 5366, independent conditional: 0, independent unconditional: 5366, dependent: 221, dependent conditional: 0, dependent unconditional: 221, unknown: 18, unknown conditional: 0, unknown unconditional: 18] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3176, independent: 3118, independent conditional: 0, independent unconditional: 3118, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 4, unknown conditional: 0, unknown unconditional: 4] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3176, independent: 3058, independent conditional: 0, independent unconditional: 3058, dependent: 118, dependent conditional: 0, dependent unconditional: 118, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 118, independent: 60, independent conditional: 0, independent unconditional: 60, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 4, unknown conditional: 0, unknown unconditional: 4] , SemanticIndependenceRelation.Query Time [ms]: [ total: 8760, independent: 45, independent conditional: 0, independent unconditional: 45, dependent: 113, dependent conditional: 0, dependent unconditional: 113, unknown: 8602, unknown conditional: 0, unknown unconditional: 8602] ], Cache Queries: [ total: 5605, independent: 2248, independent conditional: 0, independent unconditional: 2248, dependent: 167, dependent conditional: 0, dependent unconditional: 167, unknown: 3190, unknown conditional: 0, unknown unconditional: 3190] , Statistics on independence cache: Total cache size (in pairs): 223, Positive cache size: 205, Positive conditional cache size: 0, Positive unconditional cache size: 205, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 1, Unknown conditional cache size: 0, Unknown unconditional cache size: 1 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 762]: 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: 761]: 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: 713]: 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, 213 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 17.4s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 13.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 227 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 227 mSDsluCounter, 41 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 25 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 592 IncrementalHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 16 mSDtfsCounter, 592 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=232occurred in iteration=7, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 290 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 77 ConstructedInterpolants, 2 QuantifiedInterpolants, 716 SizeOfPredicates, 27 NumberOfNonLiveVariables, 677 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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! [2022-12-14 09:22:24,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_092b603f-1424-4f54-9327-fd30be498e62/bin/utaipan-gh47qXpMRh/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