./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekcba_nxt.2.M1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekcba_nxt.2.M1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur --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 bfe38d632dc9d05bd2dc6fdd28950c1547024966bcab88b0922592f6fd40a86e --- 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-38b53e6 [2022-11-26 00:21:43,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:21:43,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:21:43,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:21:43,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:21:43,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:21:43,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:21:43,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:21:43,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:21:43,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:21:43,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:21:43,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:21:43,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:21:43,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:21:43,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:21:43,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:21:43,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:21:43,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:21:43,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:21:44,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:21:44,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:21:44,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:21:44,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:21:44,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:21:44,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:21:44,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:21:44,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:21:44,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:21:44,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:21:44,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:21:44,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:21:44,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:21:44,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:21:44,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:21:44,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:21:44,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:21:44,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:21:44,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:21:44,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:21:44,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:21:44,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:21:44,038 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:21:44,081 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:21:44,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:21:44,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:21:44,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:21:44,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:21:44,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:21:44,084 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:21:44,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:21:44,084 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:21:44,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:21:44,085 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:21:44,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:21:44,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:21:44,086 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:21:44,086 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:21:44,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:21:44,087 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:21:44,087 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:21:44,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:21:44,088 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:21:44,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:21:44,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:21:44,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:21:44,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:21:44,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:21:44,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:21:44,089 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:21:44,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:21:44,090 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:21:44,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:21:44,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:21:44,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:21:44,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:21:44,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:21:44,091 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:21:44,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:21:44,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:21:44,091 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:21:44,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:21:44,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:21:44,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:21:44,092 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_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfe38d632dc9d05bd2dc6fdd28950c1547024966bcab88b0922592f6fd40a86e [2022-11-26 00:21:44,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:21:44,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:21:44,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:21:44,476 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:21:44,477 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:21:44,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded/rekcba_nxt.2.M1-1.c [2022-11-26 00:21:47,609 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:21:47,949 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:21:47,951 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/sv-benchmarks/c/seq-mthreaded/rekcba_nxt.2.M1-1.c [2022-11-26 00:21:47,975 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/data/90fdeacca/fc1fc07d94f2426b857ba9171ea16519/FLAGd8a287fa4 [2022-11-26 00:21:47,995 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/data/90fdeacca/fc1fc07d94f2426b857ba9171ea16519 [2022-11-26 00:21:47,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:21:48,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:21:48,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:21:48,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:21:48,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:21:48,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:21:47" (1/1) ... [2022-11-26 00:21:48,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4109b45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:48, skipping insertion in model container [2022-11-26 00:21:48,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:21:47" (1/1) ... [2022-11-26 00:21:48,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:21:48,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:21:48,278 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_f60a5089-e01f-427f-8441-651973763c3c/sv-benchmarks/c/seq-mthreaded/rekcba_nxt.2.M1-1.c[2020,2033] [2022-11-26 00:21:48,358 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_count [2022-11-26 00:21:48,358 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_count [2022-11-26 00:21:48,361 WARN L623 FunctionHandler]: Unknown extern function ecrobot_sound_tone [2022-11-26 00:21:48,366 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_speed [2022-11-26 00:21:48,367 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_speed [2022-11-26 00:21:48,368 WARN L623 FunctionHandler]: Unknown extern function ecrobot_bt_data_logger [2022-11-26 00:21:48,368 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_speed [2022-11-26 00:21:48,369 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_speed [2022-11-26 00:21:48,384 WARN L623 FunctionHandler]: Unknown extern function ecrobot_status_monitor [2022-11-26 00:21:48,384 WARN L623 FunctionHandler]: Unknown extern function write_mode_on_lcd [2022-11-26 00:21:48,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:21:48,675 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:21:48,691 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_f60a5089-e01f-427f-8441-651973763c3c/sv-benchmarks/c/seq-mthreaded/rekcba_nxt.2.M1-1.c[2020,2033] [2022-11-26 00:21:48,710 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_count [2022-11-26 00:21:48,729 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_count [2022-11-26 00:21:48,730 WARN L623 FunctionHandler]: Unknown extern function ecrobot_sound_tone [2022-11-26 00:21:48,733 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_speed [2022-11-26 00:21:48,747 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_speed [2022-11-26 00:21:48,747 WARN L623 FunctionHandler]: Unknown extern function ecrobot_bt_data_logger [2022-11-26 00:21:48,748 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_speed [2022-11-26 00:21:48,748 WARN L623 FunctionHandler]: Unknown extern function nxt_motor_set_speed [2022-11-26 00:21:48,753 WARN L623 FunctionHandler]: Unknown extern function ecrobot_status_monitor [2022-11-26 00:21:48,753 WARN L623 FunctionHandler]: Unknown extern function write_mode_on_lcd [2022-11-26 00:21:48,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:21:49,002 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:21:49,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49 WrapperNode [2022-11-26 00:21:49,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:21:49,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:21:49,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:21:49,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:21:49,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,259 INFO L138 Inliner]: procedures = 62, calls = 1929, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 4123 [2022-11-26 00:21:49,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:21:49,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:21:49,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:21:49,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:21:49,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,439 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:21:49,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:21:49,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:21:49,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:21:49,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (1/1) ... [2022-11-26 00:21:49,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:21:49,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:49,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:21:49,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60a5089-e01f-427f-8441-651973763c3c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:21:49,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:21:49,552 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-11-26 00:21:49,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-11-26 00:21:49,553 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-11-26 00:21:49,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-11-26 00:21:49,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:21:49,554 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-11-26 00:21:49,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-11-26 00:21:49,554 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-11-26 00:21:49,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-11-26 00:21:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_observer_obstacle_flag [2022-11-26 00:21:49,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_observer_obstacle_flag [2022-11-26 00:21:49,603 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-11-26 00:21:49,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-11-26 00:21:49,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:21:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-11-26 00:21:49,604 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-11-26 00:21:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-11-26 00:21:49,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-11-26 00:21:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-26 00:21:49,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-11-26 00:21:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-26 00:21:49,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-11-26 00:21:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:21:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-26 00:21:49,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2022-11-26 00:21:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:21:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-26 00:21:49,605 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-26 00:21:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-11-26 00:21:49,605 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-11-26 00:21:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2022-11-26 00:21:49,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2022-11-26 00:21:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:21:49,605 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:21:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:21:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:21:49,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:21:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-11-26 00:21:49,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-11-26 00:21:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-11-26 00:21:49,606 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-11-26 00:21:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-11-26 00:21:49,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-11-26 00:21:50,174 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:21:50,176 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:21:57,486 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:21:57,716 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:21:57,716 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:21:57,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:21:57 BoogieIcfgContainer [2022-11-26 00:21:57,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:21:57,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:21:57,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:21:57,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:21:57,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:21:47" (1/3) ... [2022-11-26 00:21:57,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c7a51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:21:57, skipping insertion in model container [2022-11-26 00:21:57,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:49" (2/3) ... [2022-11-26 00:21:57,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c7a51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:21:57, skipping insertion in model container [2022-11-26 00:21:57,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:21:57" (3/3) ... [2022-11-26 00:21:57,732 INFO L112 eAbstractionObserver]: Analyzing ICFG rekcba_nxt.2.M1-1.c [2022-11-26 00:21:57,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:21:57,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:21:57,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:21:57,860 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;@78ef12e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:21:57,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:21:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 1236 states, 761 states have (on average 1.2772667542706964) internal successors, (972), 793 states have internal predecessors, (972), 455 states have call successors, (455), 18 states have call predecessors, (455), 18 states have return successors, (455), 453 states have call predecessors, (455), 455 states have call successors, (455) [2022-11-26 00:21:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-11-26 00:21:57,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:57,943 INFO L195 NwaCegarLoop]: trace histogram [111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:57,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:21:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:57,950 INFO L85 PathProgramCache]: Analyzing trace with hash 166903147, now seen corresponding path program 1 times [2022-11-26 00:21:57,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:57,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356052576] [2022-11-26 00:21:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:57,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms