./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/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_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/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_33112ee7-5ed3-4c97-9d13-c1ef0e350290/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 c3428ae6a0cff233befb72334b90ad9e2070ed1c51acfcfa2fe6d4fef2ceb1ff --- 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 14:38:15,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:38:15,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:38:15,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:38:15,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:38:15,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:38:15,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:38:15,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:38:15,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:38:15,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:38:15,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:38:15,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:38:15,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:38:15,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:38:15,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:38:15,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:38:15,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:38:15,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:38:15,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:38:15,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:38:15,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:38:15,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:38:15,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:38:15,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:38:15,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:38:15,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:38:15,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:38:15,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:38:15,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:38:15,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:38:15,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:38:15,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:38:15,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:38:15,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:38:15,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:38:15,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:38:15,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:38:15,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:38:15,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:38:15,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:38:15,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:38:15,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:38:15,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:38:15,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:38:15,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:38:15,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:38:15,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:38:15,422 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:38:15,422 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:38:15,422 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:38:15,422 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:38:15,423 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:38:15,423 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:38:15,423 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:38:15,423 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:38:15,424 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:38:15,424 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:38:15,424 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:38:15,424 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:38:15,424 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:38:15,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:38:15,425 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:38:15,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:38:15,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:38:15,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:38:15,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:38:15,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:38:15,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:38:15,428 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:38:15,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:38:15,430 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:38:15,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:38:15,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:38:15,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:38:15,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:38:15,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:38:15,431 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:38:15,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:38:15,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:38:15,433 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:38:15,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:38:15,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:38:15,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:38:15,434 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_33112ee7-5ed3-4c97-9d13-c1ef0e350290/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3428ae6a0cff233befb72334b90ad9e2070ed1c51acfcfa2fe6d4fef2ceb1ff [2022-11-23 14:38:15,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:38:15,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:38:15,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:38:15,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:38:15,768 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:38:15,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-1.c [2022-11-23 14:38:18,845 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:38:19,163 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:38:19,164 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-1.c [2022-11-23 14:38:19,182 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW/data/40d72fff9/4f8eb172df184eeeae34f2ee554ed08a/FLAGfb6de9c5a [2022-11-23 14:38:19,196 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW/data/40d72fff9/4f8eb172df184eeeae34f2ee554ed08a [2022-11-23 14:38:19,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:38:19,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:38:19,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:38:19,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:38:19,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:38:19,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:38:19" (1/1) ... [2022-11-23 14:38:19,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335f6e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:19, skipping insertion in model container [2022-11-23 14:38:19,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:38:19" (1/1) ... [2022-11-23 14:38:19,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:38:19,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:38:19,572 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_33112ee7-5ed3-4c97-9d13-c1ef0e350290/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-1.c[1682,1695] [2022-11-23 14:38:20,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:38:20,097 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:38:20,112 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_33112ee7-5ed3-4c97-9d13-c1ef0e350290/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-1.c[1682,1695] [2022-11-23 14:38:20,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:38:20,417 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:38:20,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20 WrapperNode [2022-11-23 14:38:20,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:38:20,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:38:20,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:38:20,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:38:20,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,666 INFO L138 Inliner]: procedures = 56, calls = 2072, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 4032 [2022-11-23 14:38:20,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:38:20,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:38:20,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:38:20,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:38:20,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,840 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:38:20,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:38:20,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:38:20,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:38:20,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (1/1) ... [2022-11-23 14:38:20,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:38:20,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:38:20,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:38:20,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33112ee7-5ed3-4c97-9d13-c1ef0e350290/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:38:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:38:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-11-23 14:38:20,969 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-11-23 14:38:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-11-23 14:38:20,969 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-11-23 14:38:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:38:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-11-23 14:38:20,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-11-23 14:38:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-11-23 14:38:20,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-11-23 14:38:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-11-23 14:38:20,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-11-23 14:38:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:38:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-11-23 14:38:20,971 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-11-23 14:38:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-11-23 14:38:20,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-11-23 14:38:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-23 14:38:20,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-23 14:38:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-23 14:38:20,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-23 14:38:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:38:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2022-11-23 14:38:20,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2022-11-23 14:38:20,974 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-23 14:38:20,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-23 14:38:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:38:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-23 14:38:20,975 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-23 14:38:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-11-23 14:38:20,975 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-11-23 14:38:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 14:38:20,976 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 14:38:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:38:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:38:20,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:38:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-11-23 14:38:20,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-11-23 14:38:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-11-23 14:38:20,977 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-11-23 14:38:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-11-23 14:38:20,977 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-11-23 14:38:21,526 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:38:21,529 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:38:29,942 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:38:30,110 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:38:30,110 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:38:30,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:38:30 BoogieIcfgContainer [2022-11-23 14:38:30,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:38:30,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:38:30,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:38:30,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:38:30,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:38:19" (1/3) ... [2022-11-23 14:38:30,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624edcd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:38:30, skipping insertion in model container [2022-11-23 14:38:30,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:20" (2/3) ... [2022-11-23 14:38:30,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624edcd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:38:30, skipping insertion in model container [2022-11-23 14:38:30,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:38:30" (3/3) ... [2022-11-23 14:38:30,124 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_nxt.2.M4-1.c [2022-11-23 14:38:30,143 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:38:30,143 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:38:30,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:38:30,274 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;@36acbe85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:38:30,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:38:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 1618 states, 959 states have (on average 1.2283628779979145) internal successors, (1178), 964 states have internal predecessors, (1178), 640 states have call successors, (640), 17 states have call predecessors, (640), 17 states have return successors, (640), 638 states have call predecessors, (640), 640 states have call successors, (640) [2022-11-23 14:38:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2022-11-23 14:38:30,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:30,339 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 14:38:30,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:38:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:30,346 INFO L85 PathProgramCache]: Analyzing trace with hash 516111169, now seen corresponding path program 1 times [2022-11-23 14:38:30,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:38:30,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889338490] [2022-11-23 14:38:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:30,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms