./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5816b6ee4c54982d6c4f363e51f69070026ee50b2ef95cedbe859f62dcbecd24 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:18:13,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:18:13,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:18:13,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:18:13,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:18:13,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:18:13,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:18:13,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:18:13,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:18:13,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:18:13,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:18:13,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:18:13,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:18:13,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:18:13,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:18:13,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:18:13,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:18:13,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:18:13,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:18:13,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:18:13,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:18:13,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:18:13,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:18:13,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:18:13,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:18:13,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:18:13,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:18:13,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:18:13,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:18:13,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:18:13,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:18:13,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:18:13,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:18:13,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:18:13,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:18:13,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:18:13,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:18:13,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:18:13,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:18:13,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:18:13,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:18:13,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:18:13,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:18:13,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:18:13,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:18:13,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:18:13,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:18:13,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:18:13,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:18:13,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:18:13,118 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:18:13,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:18:13,118 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:18:13,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:18:13,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:18:13,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:18:13,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:18:13,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:18:13,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:18:13,119 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:18:13,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:18:13,119 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:18:13,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:18:13,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:18:13,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:18:13,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:18:13,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:18:13,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:18:13,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:18:13,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:18:13,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:18:13,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:18:13,129 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:18:13,130 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:18:13,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:18:13,130 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5816b6ee4c54982d6c4f363e51f69070026ee50b2ef95cedbe859f62dcbecd24 [2021-12-28 01:18:13,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:18:13,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:18:13,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:18:13,485 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:18:13,485 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:18:13,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c [2021-12-28 01:18:13,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e77dd45d/83b06148d5ab4615b1d1605c0cfebb55/FLAG0972c5171 [2021-12-28 01:18:14,201 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:18:14,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c [2021-12-28 01:18:14,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e77dd45d/83b06148d5ab4615b1d1605c0cfebb55/FLAG0972c5171 [2021-12-28 01:18:14,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e77dd45d/83b06148d5ab4615b1d1605c0cfebb55 [2021-12-28 01:18:14,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:18:14,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:18:14,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:18:14,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:18:14,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:18:14,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:18:14" (1/1) ... [2021-12-28 01:18:14,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c8f2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:14, skipping insertion in model container [2021-12-28 01:18:14,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:18:14" (1/1) ... [2021-12-28 01:18:14,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:18:14,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:18:14,648 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c[1762,1775] [2021-12-28 01:18:14,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:18:14,994 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:18:15,028 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.3.M4.c[1762,1775] [2021-12-28 01:18:15,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:18:15,262 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:18:15,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15 WrapperNode [2021-12-28 01:18:15,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:18:15,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:18:15,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:18:15,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:18:15,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (1/1) ... [2021-12-28 01:18:15,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (1/1) ... [2021-12-28 01:18:15,571 INFO L137 Inliner]: procedures = 60, calls = 2543, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 4814 [2021-12-28 01:18:15,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:18:15,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:18:15,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:18:15,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:18:15,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (1/1) ... [2021-12-28 01:18:15,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (1/1) ... [2021-12-28 01:18:15,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (1/1) ... [2021-12-28 01:18:15,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (1/1) ... [2021-12-28 01:18:15,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (1/1) ... [2021-12-28 01:18:15,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (1/1) ... [2021-12-28 01:18:15,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (1/1) ... [2021-12-28 01:18:15,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:18:15,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:18:15,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:18:15,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:18:15,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (1/1) ... [2021-12-28 01:18:15,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:18:16,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:18:16,033 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 01:18:16,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 01:18:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:18:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2021-12-28 01:18:16,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2021-12-28 01:18:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2021-12-28 01:18:16,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2021-12-28 01:18:16,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 01:18:16,135 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2021-12-28 01:18:16,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2021-12-28 01:18:16,135 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2021-12-28 01:18:16,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2021-12-28 01:18:16,135 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_observer_obstacle_flag [2021-12-28 01:18:16,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_observer_obstacle_flag [2021-12-28 01:18:16,136 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2021-12-28 01:18:16,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2021-12-28 01:18:16,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 01:18:16,136 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2021-12-28 01:18:16,136 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2021-12-28 01:18:16,136 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2021-12-28 01:18:16,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2021-12-28 01:18:16,137 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-12-28 01:18:16,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-12-28 01:18:16,137 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-12-28 01:18:16,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-12-28 01:18:16,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 01:18:16,137 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2021-12-28 01:18:16,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2021-12-28 01:18:16,138 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2021-12-28 01:18:16,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2021-12-28 01:18:16,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 01:18:16,138 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-12-28 01:18:16,138 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-12-28 01:18:16,138 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2021-12-28 01:18:16,139 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2021-12-28 01:18:16,139 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2021-12-28 01:18:16,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2021-12-28 01:18:16,139 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 01:18:16,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 01:18:16,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:18:16,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:18:16,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:18:16,140 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2021-12-28 01:18:16,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2021-12-28 01:18:16,141 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2021-12-28 01:18:16,141 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2021-12-28 01:18:16,141 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2021-12-28 01:18:16,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2021-12-28 01:18:16,687 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:18:16,689 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:18:23,538 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:18:23,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:18:23,557 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:18:23,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:18:23 BoogieIcfgContainer [2021-12-28 01:18:23,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:18:23,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:18:23,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:18:23,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:18:23,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:18:14" (1/3) ... [2021-12-28 01:18:23,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10deca2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:18:23, skipping insertion in model container [2021-12-28 01:18:23,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:15" (2/3) ... [2021-12-28 01:18:23,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10deca2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:18:23, skipping insertion in model container [2021-12-28 01:18:23,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:18:23" (3/3) ... [2021-12-28 01:18:23,567 INFO L111 eAbstractionObserver]: Analyzing ICFG rekh_nxt.3.M4.c [2021-12-28 01:18:23,572 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:18:23,572 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:18:23,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:18:23,625 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:18:23,625 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:18:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 1944 states, 1149 states have (on average 1.2027850304612706) internal successors, (1382), 1153 states have internal predecessors, (1382), 774 states have call successors, (774), 19 states have call predecessors, (774), 19 states have return successors, (774), 772 states have call predecessors, (774), 774 states have call successors, (774) [2021-12-28 01:18:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1311 [2021-12-28 01:18:23,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:23,779 INFO L514 BasicCegarLoop]: trace histogram [209, 209, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:18:23,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:23,788 INFO L85 PathProgramCache]: Analyzing trace with hash 502494177, now seen corresponding path program 1 times [2021-12-28 01:18:23,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:23,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319232777] [2021-12-28 01:18:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:23,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms