./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW --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 564efe4dc14fe185d57e5aeec9a3ab580efe33ed3c6c6b76402e1a3f93fbdd78 --- 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-4e7fbc6 [2022-11-23 15:56:55,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:56:55,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:56:55,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:56:55,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:56:55,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:56:55,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:56:55,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:56:55,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:56:55,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:56:55,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:56:55,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:56:55,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:56:55,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:56:55,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:56:55,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:56:55,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:56:55,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:56:55,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:56:55,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:56:55,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:56:55,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:56:55,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:56:55,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:56:55,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:56:55,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:56:55,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:56:55,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:56:55,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:56:55,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:56:55,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:56:55,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:56:55,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:56:55,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:56:55,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:56:55,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:56:55,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:56:55,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:56:55,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:56:55,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:56:55,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:56:55,787 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:56:55,830 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:56:55,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:56:55,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:56:55,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:56:55,831 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:56:55,831 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:56:55,832 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:56:55,832 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:56:55,832 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:56:55,832 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:56:55,832 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:56:55,832 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:56:55,833 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:56:55,833 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:56:55,833 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:56:55,833 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:56:55,833 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:56:55,834 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:56:55,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:56:55,834 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:56:55,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:56:55,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:56:55,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:56:55,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:56:55,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:56:55,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:56:55,835 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:56:55,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:56:55,836 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:56:55,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:56:55,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:56:55,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:56:55,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:56:55,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:56:55,837 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:56:55,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:56:55,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:56:55,838 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:56:55,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:56:55,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:56:55,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:56:55,838 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_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 564efe4dc14fe185d57e5aeec9a3ab580efe33ed3c6c6b76402e1a3f93fbdd78 [2022-11-23 15:56:56,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:56:56,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:56:56,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:56:56,137 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:56:56,138 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:56:56,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-2.c [2022-11-23 15:56:59,120 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:56:59,529 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:56:59,530 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-2.c [2022-11-23 15:56:59,546 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/data/97921ec32/71124d60b1c44e5fa792e904071155a4/FLAG13df51975 [2022-11-23 15:56:59,566 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/data/97921ec32/71124d60b1c44e5fa792e904071155a4 [2022-11-23 15:56:59,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:56:59,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:56:59,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:56:59,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:56:59,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:56:59,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:56:59" (1/1) ... [2022-11-23 15:56:59,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4957060c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:59, skipping insertion in model container [2022-11-23 15:56:59,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:56:59" (1/1) ... [2022-11-23 15:56:59,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:56:59,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:56:59,912 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_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-2.c[1765,1778] [2022-11-23 15:57:00,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:57:00,353 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:57:00,368 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_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-2.c[1765,1778] [2022-11-23 15:57:00,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:57:00,622 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:57:00,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00 WrapperNode [2022-11-23 15:57:00,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:57:00,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:57:00,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:57:00,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:57:00,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:00,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:00,891 INFO L138 Inliner]: procedures = 60, calls = 2543, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 4814 [2022-11-23 15:57:00,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:57:00,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:57:00,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:57:00,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:57:00,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:00,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:00,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:00,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:01,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:01,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:01,118 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:01,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:01,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:57:01,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:57:01,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:57:01,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:57:01,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (1/1) ... [2022-11-23 15:57:01,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:57:01,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:57:01,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:57:01,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92aeb0a2-ad2b-4163-8a59-a21cb9ccbbf0/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:57:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:57:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-11-23 15:57:01,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-11-23 15:57:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-11-23 15:57:01,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-11-23 15:57:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:57:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-11-23 15:57:01,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-11-23 15:57:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-11-23 15:57:01,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-11-23 15:57:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_observer_obstacle_flag [2022-11-23 15:57:01,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_observer_obstacle_flag [2022-11-23 15:57:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-11-23 15:57:01,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-11-23 15:57:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:57:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-11-23 15:57:01,272 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-11-23 15:57:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-11-23 15:57:01,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-11-23 15:57:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-23 15:57:01,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-23 15:57:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-23 15:57:01,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-23 15:57:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:57:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2022-11-23 15:57:01,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2022-11-23 15:57:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-23 15:57:01,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-23 15:57:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:57:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-23 15:57:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-23 15:57:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-11-23 15:57:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-11-23 15:57:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2022-11-23 15:57:01,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2022-11-23 15:57:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:57:01,277 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:57:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:57:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:57:01,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:57:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-11-23 15:57:01,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-11-23 15:57:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-11-23 15:57:01,278 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-11-23 15:57:01,279 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-11-23 15:57:01,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-11-23 15:57:01,813 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:57:01,815 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:57:10,911 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:57:11,111 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:57:11,111 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:57:11,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:57:11 BoogieIcfgContainer [2022-11-23 15:57:11,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:57:11,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:57:11,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:57:11,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:57:11,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:56:59" (1/3) ... [2022-11-23 15:57:11,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0a35ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:57:11, skipping insertion in model container [2022-11-23 15:57:11,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:57:00" (2/3) ... [2022-11-23 15:57:11,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0a35ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:57:11, skipping insertion in model container [2022-11-23 15:57:11,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:57:11" (3/3) ... [2022-11-23 15:57:11,127 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_nxt.2.M4-2.c [2022-11-23 15:57:11,148 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:57:11,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:57:11,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:57:11,268 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;@5d15e9e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:57:11,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:57:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 1899 states, 1104 states have (on average 1.2047101449275361) internal successors, (1330), 1109 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) [2022-11-23 15:57:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2022-11-23 15:57:11,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:57:11,340 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] [2022-11-23 15:57:11,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:57:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:57:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1645130299, now seen corresponding path program 1 times [2022-11-23 15:57:11,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:57:11,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125492607] [2022-11-23 15:57:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:57:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms