./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekcba_nxt.1.M4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekcba_nxt.1.M4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS --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 59e3e46f44c4af6b4c125f352948304d54499979006c079b47d74ff56c39a104 --- 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-8393723 [2022-11-19 07:22:01,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:22:01,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:22:01,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:22:01,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:22:01,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:22:01,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:22:01,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:22:01,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:22:01,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:22:01,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:22:01,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:22:01,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:22:01,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:22:01,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:22:01,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:22:01,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:22:01,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:22:01,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:22:01,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:22:01,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:22:01,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:22:01,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:22:01,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:22:01,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:22:01,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:22:01,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:22:01,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:22:01,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:22:01,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:22:01,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:22:01,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:22:01,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:22:01,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:22:01,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:22:01,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:22:01,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:22:01,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:22:01,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:22:01,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:22:01,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:22:01,568 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:22:01,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:22:01,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:22:01,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:22:01,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:22:01,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:22:01,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:22:01,591 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:22:01,591 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:22:01,591 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:22:01,591 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:22:01,591 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:22:01,592 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:22:01,592 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:22:01,592 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:22:01,592 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:22:01,593 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:22:01,593 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:22:01,593 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:22:01,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:22:01,594 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:22:01,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:22:01,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:22:01,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:22:01,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:22:01,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:22:01,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:22:01,595 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:22:01,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:22:01,596 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:22:01,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:22:01,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:22:01,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:22:01,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:22:01,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:22:01,597 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:22:01,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:22:01,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:22:01,598 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:22:01,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:22:01,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:22:01,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:22:01,599 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_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59e3e46f44c4af6b4c125f352948304d54499979006c079b47d74ff56c39a104 [2022-11-19 07:22:01,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:22:01,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:22:01,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:22:01,894 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:22:01,894 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:22:01,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded/rekcba_nxt.1.M4-1.c [2022-11-19 07:22:01,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/data/c101492a6/0dbf85b94fd14d8a865e0226460eed42/FLAG456d5c4d6 [2022-11-19 07:22:02,790 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:22:02,791 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/sv-benchmarks/c/seq-mthreaded/rekcba_nxt.1.M4-1.c [2022-11-19 07:22:02,835 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/data/c101492a6/0dbf85b94fd14d8a865e0226460eed42/FLAG456d5c4d6 [2022-11-19 07:22:03,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/data/c101492a6/0dbf85b94fd14d8a865e0226460eed42 [2022-11-19 07:22:03,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:22:03,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:22:03,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:22:03,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:22:03,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:22:03,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:03,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2650105a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03, skipping insertion in model container [2022-11-19 07:22:03,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:03,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:22:03,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:22:03,753 WARN L234 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_f6411bb7-fcad-4690-b09c-ec87a99fc536/sv-benchmarks/c/seq-mthreaded/rekcba_nxt.1.M4-1.c[1673,1686] [2022-11-19 07:22:04,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:22:04,870 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:22:04,883 WARN L234 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_f6411bb7-fcad-4690-b09c-ec87a99fc536/sv-benchmarks/c/seq-mthreaded/rekcba_nxt.1.M4-1.c[1673,1686] [2022-11-19 07:22:05,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:22:05,812 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:22:05,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05 WrapperNode [2022-11-19 07:22:05,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:22:05,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:22:05,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:22:05,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:22:05,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:06,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:07,645 INFO L138 Inliner]: procedures = 57, calls = 17866, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 39403 [2022-11-19 07:22:07,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:22:07,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:22:07,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:22:07,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:22:07,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:07,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:08,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:08,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:08,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:08,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:08,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:08,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:09,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:22:09,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:22:09,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:22:09,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:22:09,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (1/1) ... [2022-11-19 07:22:09,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:22:09,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:09,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:22:09,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6411bb7-fcad-4690-b09c-ec87a99fc536/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:22:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:22:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-11-19 07:22:09,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-11-19 07:22:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-11-19 07:22:09,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-11-19 07:22:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:22:09,434 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-11-19 07:22:09,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-11-19 07:22:09,434 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-11-19 07:22:09,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-11-19 07:22:09,438 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-11-19 07:22:09,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-11-19 07:22:09,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:22:09,438 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-11-19 07:22:09,438 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-11-19 07:22:09,439 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-11-19 07:22:09,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-11-19 07:22:09,439 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-19 07:22:09,439 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-19 07:22:09,439 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-19 07:22:09,439 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-19 07:22:09,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:22:09,440 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-19 07:22:09,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-19 07:22:09,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:22:09,441 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-11-19 07:22:09,454 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-11-19 07:22:09,454 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:22:09,454 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:22:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:22:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:22:09,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:22:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-11-19 07:22:09,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-11-19 07:22:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-11-19 07:22:09,456 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-11-19 07:22:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-11-19 07:22:09,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-11-19 07:22:11,880 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:22:11,884 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:23:00,065 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:23:00,925 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:23:00,926 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:23:00,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:23:00 BoogieIcfgContainer [2022-11-19 07:23:00,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:23:00,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:23:00,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:23:00,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:23:00,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:22:03" (1/3) ... [2022-11-19 07:23:00,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3e2351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:23:00, skipping insertion in model container [2022-11-19 07:23:00,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:05" (2/3) ... [2022-11-19 07:23:00,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3e2351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:23:00, skipping insertion in model container [2022-11-19 07:23:00,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:23:00" (3/3) ... [2022-11-19 07:23:00,952 INFO L112 eAbstractionObserver]: Analyzing ICFG rekcba_nxt.1.M4-1.c [2022-11-19 07:23:00,970 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:23:00,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:23:01,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:23:01,227 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;@15735a58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:23:01,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:23:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 11972 states, 7837 states have (on average 1.3205308153630215) internal successors, (10349), 7950 states have internal predecessors, (10349), 4118 states have call successors, (4118), 15 states have call predecessors, (4118), 15 states have return successors, (4118), 4116 states have call predecessors, (4118), 4118 states have call successors, (4118) [2022-11-19 07:23:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3937 [2022-11-19 07:23:01,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:01,897 INFO L195 NwaCegarLoop]: trace histogram [337, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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07:23:01,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash -647221675, now seen corresponding path program 1 times [2022-11-19 07:23:01,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:01,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230642364] [2022-11-19 07:23:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms