./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 cf1a7837 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_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/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_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --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 --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:10:41,686 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:10:41,800 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:10:41,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:10:41,810 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:10:41,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:10:41,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:10:41,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:10:41,850 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:10:41,855 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:10:41,855 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:10:41,856 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:10:41,856 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:10:41,858 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:10:41,859 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:10:41,859 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:10:41,859 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:10:41,860 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:10:41,861 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:10:41,861 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:10:41,862 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:10:41,862 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:10:41,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:10:41,864 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:10:41,864 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:10:41,865 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:10:41,865 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:10:41,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:10:41,866 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:10:41,867 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:10:41,868 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:10:41,868 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:10:41,869 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:10:41,869 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:10:41,869 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:10:41,870 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:10:41,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:41,870 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:10:41,871 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:10:41,871 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:10:41,871 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:10:41,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:10:41,872 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:10:41,872 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:10:41,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:10:41,873 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3428ae6a0cff233befb72334b90ad9e2070ed1c51acfcfa2fe6d4fef2ceb1ff [2023-11-12 00:10:42,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:10:42,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:10:42,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:10:42,228 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:10:42,228 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:10:42,231 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-1.c [2023-11-12 00:10:45,475 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:10:45,978 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:10:45,979 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-1.c [2023-11-12 00:10:46,008 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/data/d0ec27701/8ba0fe6d7deb41ce80f4fe4b5927df0e/FLAG4aadbe0f5 [2023-11-12 00:10:46,030 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/data/d0ec27701/8ba0fe6d7deb41ce80f4fe4b5927df0e [2023-11-12 00:10:46,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:10:46,038 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:10:46,041 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:46,042 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:10:46,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:10:46,048 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:46" (1/1) ... [2023-11-12 00:10:46,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e995568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:46, skipping insertion in model container [2023-11-12 00:10:46,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:46" (1/1) ... [2023-11-12 00:10:46,144 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:10:46,385 WARN L240 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_009a2048-cd53-4319-a6c0-24a33d8d0a58/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-1.c[1682,1695] [2023-11-12 00:10:46,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:46,966 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:10:46,978 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"/tmp/aaaa/nxt.ok2.i","-S") [42] [2023-11-12 00:10:46,984 WARN L240 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_009a2048-cd53-4319-a6c0-24a33d8d0a58/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M4-1.c[1682,1695] [2023-11-12 00:10:47,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:47,387 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:10:47,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47 WrapperNode [2023-11-12 00:10:47,388 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:47,390 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:47,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:10:47,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:10:47,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:47,495 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:47,938 INFO L138 Inliner]: procedures = 56, calls = 2072, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 4197 [2023-11-12 00:10:47,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:47,940 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:10:47,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:10:47,941 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:10:47,983 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:47,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:48,040 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:48,040 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:48,199 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:48,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:48,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:48,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:48,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:10:48,326 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:10:48,326 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:10:48,327 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:10:48,327 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (1/1) ... [2023-11-12 00:10:48,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:48,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:10:48,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009a2048-cd53-4319-a6c0-24a33d8d0a58/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:10:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:10:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2023-11-12 00:10:48,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2023-11-12 00:10:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2023-11-12 00:10:48,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2023-11-12 00:10:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:10:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2023-11-12 00:10:48,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2023-11-12 00:10:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2023-11-12 00:10:48,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2023-11-12 00:10:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2023-11-12 00:10:48,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2023-11-12 00:10:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:10:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2023-11-12 00:10:48,420 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2023-11-12 00:10:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2023-11-12 00:10:48,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2023-11-12 00:10:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2023-11-12 00:10:48,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2023-11-12 00:10:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2023-11-12 00:10:48,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2023-11-12 00:10:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:10:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2023-11-12 00:10:48,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2023-11-12 00:10:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2023-11-12 00:10:48,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2023-11-12 00:10:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:10:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-11-12 00:10:48,424 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-11-12 00:10:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2023-11-12 00:10:48,425 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2023-11-12 00:10:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:10:48,426 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:10:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:10:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:10:48,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:10:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2023-11-12 00:10:48,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2023-11-12 00:10:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2023-11-12 00:10:48,428 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2023-11-12 00:10:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2023-11-12 00:10:48,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2023-11-12 00:10:48,867 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:10:48,870 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:10:59,541 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:10:59,807 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:10:59,807 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:10:59,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:10:59 BoogieIcfgContainer [2023-11-12 00:10:59,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:10:59,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:10:59,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:10:59,821 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:10:59,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:10:46" (1/3) ... [2023-11-12 00:10:59,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639da450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:10:59, skipping insertion in model container [2023-11-12 00:10:59,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:47" (2/3) ... [2023-11-12 00:10:59,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639da450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:10:59, skipping insertion in model container [2023-11-12 00:10:59,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:10:59" (3/3) ... [2023-11-12 00:10:59,825 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_nxt.2.M4-1.c [2023-11-12 00:10:59,849 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:10:59,849 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:10:59,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:10:59,974 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=LoopHeads, 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;@138e821c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:10:59,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:10:59,988 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) [2023-11-12 00:11:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2023-11-12 00:11:00,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:00,073 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] [2023-11-12 00:11:00,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:00,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:00,081 INFO L85 PathProgramCache]: Analyzing trace with hash -761269795, now seen corresponding path program 1 times [2023-11-12 00:11:00,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:00,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901560289] [2023-11-12 00:11:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:00,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms