./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta --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 5816b6ee4c54982d6c4f363e51f69070026ee50b2ef95cedbe859f62dcbecd24 --- 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-dbf71c6-m [2022-10-17 17:14:28,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:14:28,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:14:28,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:14:28,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:14:28,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:14:28,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:14:28,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:14:28,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:14:28,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:14:28,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:14:28,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:14:28,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:14:28,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:14:28,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:14:28,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:14:28,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:14:28,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:14:28,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:14:28,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:14:28,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:14:28,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:14:28,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:14:28,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:14:28,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:14:28,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:14:28,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:14:28,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:14:28,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:14:28,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:14:28,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:14:28,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:14:28,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:14:28,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:14:28,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:14:28,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:14:28,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:14:28,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:14:28,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:14:28,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:14:28,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:14:28,827 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:14:28,881 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:14:28,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:14:28,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:14:28,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:14:28,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:14:28,883 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:14:28,884 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:14:28,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:14:28,884 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:14:28,884 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:14:28,886 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:14:28,886 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:14:28,886 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:14:28,886 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:14:28,887 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:14:28,887 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:14:28,887 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:14:28,888 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:14:28,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:14:28,889 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:14:28,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:14:28,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:14:28,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:14:28,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:14:28,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:14:28,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:14:28,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:14:28,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:14:28,891 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:14:28,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:14:28,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:14:28,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:14:28,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:14:28,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:14:28,901 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:14:28,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:14:28,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:14:28,902 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:14:28,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:14:28,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:14:28,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:14:28,903 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_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5816b6ee4c54982d6c4f363e51f69070026ee50b2ef95cedbe859f62dcbecd24 [2022-10-17 17:14:29,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:14:29,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:14:29,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:14:29,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:14:29,210 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:14:29,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c [2022-10-17 17:14:29,282 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/data/d7f8bab45/da3f95bd0ee34088a4a4cec2787b5fe2/FLAGc4c210421 [2022-10-17 17:14:29,981 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:14:29,982 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c [2022-10-17 17:14:30,009 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/data/d7f8bab45/da3f95bd0ee34088a4a4cec2787b5fe2/FLAGc4c210421 [2022-10-17 17:14:30,124 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/data/d7f8bab45/da3f95bd0ee34088a4a4cec2787b5fe2 [2022-10-17 17:14:30,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:14:30,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:14:30,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:14:30,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:14:30,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:14:30,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:14:30" (1/1) ... [2022-10-17 17:14:30,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26b590fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:30, skipping insertion in model container [2022-10-17 17:14:30,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:14:30" (1/1) ... [2022-10-17 17:14:30,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:14:30,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:14:30,479 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c[1762,1775] [2022-10-17 17:14:30,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:14:30,947 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:14:30,960 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c[1762,1775] [2022-10-17 17:14:31,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:14:31,262 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:14:31,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31 WrapperNode [2022-10-17 17:14:31,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:14:31,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:14:31,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:14:31,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:14:31,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,580 INFO L138 Inliner]: procedures = 60, calls = 2543, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 4814 [2022-10-17 17:14:31,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:14:31,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:14:31,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:14:31,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:14:31,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,868 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:14:31,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:14:31,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:14:31,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:14:31,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (1/1) ... [2022-10-17 17:14:31,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:14:31,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:14:31,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:14:31,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13fdd0c6-26f1-494d-bd71-649ebf934d19/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:14:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:14:32,012 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-10-17 17:14:32,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-10-17 17:14:32,012 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-10-17 17:14:32,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-10-17 17:14:32,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:14:32,013 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-10-17 17:14:32,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-10-17 17:14:32,013 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-10-17 17:14:32,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-10-17 17:14:32,013 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_observer_obstacle_flag [2022-10-17 17:14:32,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_observer_obstacle_flag [2022-10-17 17:14:32,014 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-10-17 17:14:32,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-10-17 17:14:32,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:14:32,014 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-10-17 17:14:32,014 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-10-17 17:14:32,014 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-10-17 17:14:32,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-10-17 17:14:32,015 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-17 17:14:32,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-17 17:14:32,015 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-17 17:14:32,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-17 17:14:32,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:14:32,016 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2022-10-17 17:14:32,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2022-10-17 17:14:32,016 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2022-10-17 17:14:32,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2022-10-17 17:14:32,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:14:32,016 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-10-17 17:14:32,016 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-10-17 17:14:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-10-17 17:14:32,017 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-10-17 17:14:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2022-10-17 17:14:32,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2022-10-17 17:14:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:14:32,017 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:14:32,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:14:32,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:14:32,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:14:32,018 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-10-17 17:14:32,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-10-17 17:14:32,018 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-10-17 17:14:32,019 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-10-17 17:14:32,019 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-10-17 17:14:32,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-10-17 17:14:32,611 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:14:32,614 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:14:41,464 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:14:41,694 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:14:41,694 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:14:41,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:14:41 BoogieIcfgContainer [2022-10-17 17:14:41,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:14:41,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:14:41,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:14:41,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:14:41,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:14:30" (1/3) ... [2022-10-17 17:14:41,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37475dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:14:41, skipping insertion in model container [2022-10-17 17:14:41,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:31" (2/3) ... [2022-10-17 17:14:41,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37475dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:14:41, skipping insertion in model container [2022-10-17 17:14:41,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:14:41" (3/3) ... [2022-10-17 17:14:41,713 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_nxt.3.M4.c [2022-10-17 17:14:41,733 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:14:41,733 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:14:41,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:14:41,862 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;@6a076dfd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:14:41,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:14:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 1899 states, 1104 states have (on average 1.2047101449275361) internal successors, (1330), 1108 states have internal predecessors, (1330), 774 states have call successors, (774), 19 states have call predecessors, (774), 19 states have return successors, (774), 772 states have call predecessors, (774), 774 states have call successors, (774) [2022-10-17 17:14:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2022-10-17 17:14:41,965 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:41,967 INFO L195 NwaCegarLoop]: trace histogram [209, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:41,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1645130299, now seen corresponding path program 1 times [2022-10-17 17:14:41,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:41,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679481386] [2022-10-17 17:14:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:41,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms