./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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.2.M1-1.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 e0278abdbbb57b3938e33a237527cf3a8d14feaf8eba047d58da36569d27728f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:23:16,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:23:16,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:23:16,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:23:16,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:23:16,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:23:16,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:23:16,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:23:16,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:23:16,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:23:16,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:23:16,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:23:16,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:23:16,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:23:16,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:23:16,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:23:16,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:23:16,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:23:16,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:23:16,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:23:16,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:23:16,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:23:16,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:23:16,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:23:16,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:23:16,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:23:16,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:23:16,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:23:16,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:23:16,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:23:16,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:23:16,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:23:16,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:23:16,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:23:16,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:23:16,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:23:16,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:23:16,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:23:16,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:23:16,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:23:16,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:23:16,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:23:16,215 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:23:16,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:23:16,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:23:16,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:23:16,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:23:16,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:23:16,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:23:16,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:23:16,218 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:23:16,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:23:16,219 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:23:16,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:23:16,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:23:16,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:23:16,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:23:16,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:23:16,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:23:16,220 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:23:16,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:23:16,220 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:23:16,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:23:16,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:23:16,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:23:16,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:23:16,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:23:16,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:23:16,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:23:16,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:23:16,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:23:16,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:23:16,222 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:23:16,222 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:23:16,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:23:16,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:23:16,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0278abdbbb57b3938e33a237527cf3a8d14feaf8eba047d58da36569d27728f [2021-12-15 11:23:16,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:23:16,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:23:16,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:23:16,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:23:16,431 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:23:16,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c [2021-12-15 11:23:16,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1458ef032/9a7ee4b36c8444a3ae79424d86cb0268/FLAGd59da5e2c [2021-12-15 11:23:17,054 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:23:17,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-1.c [2021-12-15 11:23:17,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1458ef032/9a7ee4b36c8444a3ae79424d86cb0268/FLAGd59da5e2c [2021-12-15 11:23:17,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1458ef032/9a7ee4b36c8444a3ae79424d86cb0268 [2021-12-15 11:23:17,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:23:17,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:23:17,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:23:17,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:23:17,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:23:17,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:23:17" (1/1) ... [2021-12-15 11:23:17,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a8db026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:17, skipping insertion in model container [2021-12-15 11:23:17,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:23:17" (1/1) ... [2021-12-15 11:23:17,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:23:17,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:23:17,737 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.2.M1-1.c[1765,1778] [2021-12-15 11:23:18,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:23:18,042 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:23:18,065 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.2.M1-1.c[1765,1778] [2021-12-15 11:23:18,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:23:18,269 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:23:18,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18 WrapperNode [2021-12-15 11:23:18,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:23:18,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:23:18,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:23:18,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:23:18,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (1/1) ... [2021-12-15 11:23:18,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (1/1) ... [2021-12-15 11:23:18,508 INFO L137 Inliner]: procedures = 60, calls = 2524, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 4783 [2021-12-15 11:23:18,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:23:18,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:23:18,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:23:18,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:23:18,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (1/1) ... [2021-12-15 11:23:18,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (1/1) ... [2021-12-15 11:23:18,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (1/1) ... [2021-12-15 11:23:18,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (1/1) ... [2021-12-15 11:23:18,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (1/1) ... [2021-12-15 11:23:18,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (1/1) ... [2021-12-15 11:23:18,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (1/1) ... [2021-12-15 11:23:18,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:23:18,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:23:18,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:23:18,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:23:18,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (1/1) ... [2021-12-15 11:23:18,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:23:18,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:23:18,789 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) [2021-12-15 11:23:18,827 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 [2021-12-15 11:23:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:23:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2021-12-15 11:23:18,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2021-12-15 11:23:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2021-12-15 11:23:18,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2021-12-15 11:23:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 11:23:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2021-12-15 11:23:18,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2021-12-15 11:23:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2021-12-15 11:23:18,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2021-12-15 11:23:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_observer_obstacle_flag [2021-12-15 11:23:18,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_observer_obstacle_flag [2021-12-15 11:23:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2021-12-15 11:23:18,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2021-12-15 11:23:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 11:23:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2021-12-15 11:23:18,838 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2021-12-15 11:23:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2021-12-15 11:23:18,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2021-12-15 11:23:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-12-15 11:23:18,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2021-12-15 11:23:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-12-15 11:23:18,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2021-12-15 11:23:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 11:23:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2021-12-15 11:23:18,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2021-12-15 11:23:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 11:23:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-12-15 11:23:18,840 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-12-15 11:23:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2021-12-15 11:23:18,840 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2021-12-15 11:23:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2021-12-15 11:23:18,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2021-12-15 11:23:18,841 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-15 11:23:18,841 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-15 11:23:18,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:23:18,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:23:18,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:23:18,841 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2021-12-15 11:23:18,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2021-12-15 11:23:18,841 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2021-12-15 11:23:18,842 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2021-12-15 11:23:18,842 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2021-12-15 11:23:18,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2021-12-15 11:23:19,275 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:23:19,277 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:23:25,672 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:23:25,686 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:23:25,686 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:23:25,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:23:25 BoogieIcfgContainer [2021-12-15 11:23:25,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:23:25,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:23:25,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:23:25,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:23:25,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:23:17" (1/3) ... [2021-12-15 11:23:25,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe1de93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:23:25, skipping insertion in model container [2021-12-15 11:23:25,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:23:18" (2/3) ... [2021-12-15 11:23:25,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe1de93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:23:25, skipping insertion in model container [2021-12-15 11:23:25,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:23:25" (3/3) ... [2021-12-15 11:23:25,696 INFO L111 eAbstractionObserver]: Analyzing ICFG rekh_nxt.2.M1-1.c [2021-12-15 11:23:25,699 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:23:25,699 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:23:25,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:23:25,741 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 [2021-12-15 11:23:25,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:23:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 1938 states, 1146 states have (on average 1.2033158813263525) internal successors, (1379), 1151 states have internal predecessors, (1379), 772 states have call successors, (772), 18 states have call predecessors, (772), 18 states have return successors, (772), 770 states have call predecessors, (772), 772 states have call successors, (772) [2021-12-15 11:23:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2021-12-15 11:23:25,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:23:25,851 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] [2021-12-15 11:23:25,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:23:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:23:25,857 INFO L85 PathProgramCache]: Analyzing trace with hash -112777684, now seen corresponding path program 1 times [2021-12-15 11:23:25,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:23:25,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809792887] [2021-12-15 11:23:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:23:25,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms