/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/rekcba_aso.1.M1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:25:16,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:25:16,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:25:16,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:25:16,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:25:16,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:25:16,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:25:16,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:25:16,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:25:16,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:25:16,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:25:16,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:25:16,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:25:16,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:25:16,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:25:16,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:25:16,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:25:16,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:25:16,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:25:16,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:25:16,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:25:16,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:25:16,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:25:16,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:25:16,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:25:16,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:25:16,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:25:16,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:25:16,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:25:16,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:25:16,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:25:16,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:25:16,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:25:16,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:25:16,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:25:16,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:25:16,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:25:16,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:25:16,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:25:16,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:25:16,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:25:16,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:25:16,328 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:25:16,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:25:16,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:25:16,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:25:16,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:25:16,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:25:16,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:25:16,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:25:16,334 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:25:16,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:25:16,336 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:25:16,336 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:25:16,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:25:16,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:25:16,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:25:16,337 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:25:16,337 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:25:16,337 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:25:16,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:25:16,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:25:16,338 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:25:16,338 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:25:16,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:25:16,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:25:16,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:25:16,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:25:16,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:25:16,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:25:16,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:25:16,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:25:16,340 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:25:16,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:25:16,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:25:16,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:25:16,765 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:25:16,765 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:25:16,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekcba_aso.1.M1-1.c [2022-10-15 17:25:16,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b0f2d3a4/44af08ba355b4766b3a9a60f8f60bbf8/FLAG71df6eb3c [2022-10-15 17:25:17,683 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:25:17,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekcba_aso.1.M1-1.c [2022-10-15 17:25:17,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b0f2d3a4/44af08ba355b4766b3a9a60f8f60bbf8/FLAG71df6eb3c [2022-10-15 17:25:17,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b0f2d3a4/44af08ba355b4766b3a9a60f8f60bbf8 [2022-10-15 17:25:17,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:25:17,810 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:25:17,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:25:17,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:25:17,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:25:17,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:25:17" (1/1) ... [2022-10-15 17:25:17,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d987a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:17, skipping insertion in model container [2022-10-15 17:25:17,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:25:17" (1/1) ... [2022-10-15 17:25:17,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:25:17,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:25:18,086 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/rekcba_aso.1.M1-1.c[1974,1987] [2022-10-15 17:25:18,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:25:18,635 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:25:18,654 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/rekcba_aso.1.M1-1.c[1974,1987] [2022-10-15 17:25:18,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:25:18,997 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:25:18,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18 WrapperNode [2022-10-15 17:25:19,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:25:19,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:25:19,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:25:19,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:25:19,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,290 INFO L138 Inliner]: procedures = 60, calls = 2058, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 4373 [2022-10-15 17:25:19,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:25:19,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:25:19,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:25:19,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:25:19,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,597 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:25:19,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:25:19,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:25:19,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:25:19,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (1/1) ... [2022-10-15 17:25:19,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:25:19,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:25:19,733 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) [2022-10-15 17:25:19,760 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 [2022-10-15 17:25:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:25:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_forward [2022-10-15 17:25:19,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_forward [2022-10-15 17:25:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-10-15 17:25:19,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-10-15 17:25:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:25:19,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:25:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:25:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-10-15 17:25:19,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-10-15 17:25:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-10-15 17:25:19,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-10-15 17:25:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-10-15 17:25:19,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-10-15 17:25:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:25:19,811 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-10-15 17:25:19,811 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-10-15 17:25:19,812 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-10-15 17:25:19,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-10-15 17:25:19,812 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_turn [2022-10-15 17:25:19,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_turn [2022-10-15 17:25:19,812 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:25:19,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:25:19,813 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:25:19,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:25:19,813 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts3 [2022-10-15 17:25:19,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts3 [2022-10-15 17:25:19,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:25:19,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:25:19,814 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-10-15 17:25:19,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-10-15 17:25:19,814 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-10-15 17:25:19,814 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-10-15 17:25:19,815 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_forward [2022-10-15 17:25:19,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_forward [2022-10-15 17:25:19,815 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2022-10-15 17:25:19,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2022-10-15 17:25:19,815 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 17:25:19,816 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 17:25:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:25:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:25:19,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:25:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-10-15 17:25:19,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-10-15 17:25:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-10-15 17:25:19,817 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-10-15 17:25:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:25:19,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:25:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_turn [2022-10-15 17:25:19,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_turn [2022-10-15 17:25:20,358 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:25:20,362 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:25:27,560 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:25:27,614 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:25:27,614 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-15 17:25:27,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:25:27 BoogieIcfgContainer [2022-10-15 17:25:27,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:25:27,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:25:27,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:25:27,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:25:27,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:25:17" (1/3) ... [2022-10-15 17:25:27,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1840a647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:25:27, skipping insertion in model container [2022-10-15 17:25:27,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:18" (2/3) ... [2022-10-15 17:25:27,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1840a647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:25:27, skipping insertion in model container [2022-10-15 17:25:27,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:25:27" (3/3) ... [2022-10-15 17:25:27,640 INFO L112 eAbstractionObserver]: Analyzing ICFG rekcba_aso.1.M1-1.c [2022-10-15 17:25:27,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:25:27,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2968 error locations. [2022-10-15 17:25:27,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:25:27,881 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@16d12304, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:25:27,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2968 error locations. [2022-10-15 17:25:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 6067 states, 2596 states have (on average 2.2338212634822803) internal successors, (5799), 5595 states have internal predecessors, (5799), 481 states have call successors, (481), 21 states have call predecessors, (481), 21 states have return successors, (481), 479 states have call predecessors, (481), 481 states have call successors, (481) [2022-10-15 17:25:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:25:27,914 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:25:27,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:25:27,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2966 more)] === [2022-10-15 17:25:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:25:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash 625657, now seen corresponding path program 1 times [2022-10-15 17:25:27,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:25:27,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915271314] [2022-10-15 17:25:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:25:27,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:25:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:25:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:25:28,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:25:28,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915271314] [2022-10-15 17:25:28,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915271314] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:25:28,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:25:28,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:25:28,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277010120] [2022-10-15 17:25:28,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:25:28,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:25:28,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:25:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:25:28,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:28,594 INFO L87 Difference]: Start difference. First operand has 6067 states, 2596 states have (on average 2.2338212634822803) internal successors, (5799), 5595 states have internal predecessors, (5799), 481 states have call successors, (481), 21 states have call predecessors, (481), 21 states have return successors, (481), 479 states have call predecessors, (481), 481 states have call successors, (481) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:25:34,146 INFO L93 Difference]: Finished difference Result 7532 states and 8465 transitions. [2022-10-15 17:25:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:25:34,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-15 17:25:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:25:34,221 INFO L225 Difference]: With dead ends: 7532 [2022-10-15 17:25:34,222 INFO L226 Difference]: Without dead ends: 7528 [2022-10-15 17:25:34,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:34,229 INFO L413 NwaCegarLoop]: 4081 mSDtfsCounter, 6586 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 3661 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6586 SdHoareTripleChecker+Valid, 5263 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:25:34,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6586 Valid, 5263 Invalid, 3717 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 3661 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-10-15 17:25:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7528 states. [2022-10-15 17:25:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7528 to 6824. [2022-10-15 17:25:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6824 states, 3200 states have (on average 2.180625) internal successors, (6978), 6196 states have internal predecessors, (6978), 649 states have call successors, (649), 36 states have call predecessors, (649), 35 states have return successors, (649), 619 states have call predecessors, (649), 649 states have call successors, (649) [2022-10-15 17:25:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6824 states to 6824 states and 8276 transitions. [2022-10-15 17:25:34,951 INFO L78 Accepts]: Start accepts. Automaton has 6824 states and 8276 transitions. Word has length 3 [2022-10-15 17:25:34,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:25:34,952 INFO L495 AbstractCegarLoop]: Abstraction has 6824 states and 8276 transitions. [2022-10-15 17:25:34,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 6824 states and 8276 transitions. [2022-10-15 17:25:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:25:34,953 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:25:34,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:25:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:25:34,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2966 more)] === [2022-10-15 17:25:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:25:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash 625658, now seen corresponding path program 1 times [2022-10-15 17:25:34,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:25:34,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375262594] [2022-10-15 17:25:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:25:34,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:25:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:25:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:25:35,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:25:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375262594] [2022-10-15 17:25:35,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375262594] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:25:35,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:25:35,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:25:35,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916263086] [2022-10-15 17:25:35,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:25:35,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:25:35,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:25:35,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:25:35,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:35,129 INFO L87 Difference]: Start difference. First operand 6824 states and 8276 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:25:41,431 INFO L93 Difference]: Finished difference Result 7514 states and 8542 transitions. [2022-10-15 17:25:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:25:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-15 17:25:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:25:41,489 INFO L225 Difference]: With dead ends: 7514 [2022-10-15 17:25:41,489 INFO L226 Difference]: Without dead ends: 7514 [2022-10-15 17:25:41,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:41,493 INFO L413 NwaCegarLoop]: 4055 mSDtfsCounter, 6330 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 3545 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6330 SdHoareTripleChecker+Valid, 5239 SdHoareTripleChecker+Invalid, 3597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:25:41,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6330 Valid, 5239 Invalid, 3597 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 3545 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-10-15 17:25:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7514 states. [2022-10-15 17:25:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7514 to 6894. [2022-10-15 17:25:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6894 states, 3271 states have (on average 2.1501070009171506) internal successors, (7033), 6240 states have internal predecessors, (7033), 667 states have call successors, (667), 44 states have call predecessors, (667), 43 states have return successors, (667), 637 states have call predecessors, (667), 667 states have call successors, (667) [2022-10-15 17:25:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6894 states to 6894 states and 8367 transitions. [2022-10-15 17:25:41,985 INFO L78 Accepts]: Start accepts. Automaton has 6894 states and 8367 transitions. Word has length 3 [2022-10-15 17:25:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:25:41,985 INFO L495 AbstractCegarLoop]: Abstraction has 6894 states and 8367 transitions. [2022-10-15 17:25:41,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 6894 states and 8367 transitions. [2022-10-15 17:25:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:25:41,986 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:25:41,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:25:41,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:25:41,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2966 more)] === [2022-10-15 17:25:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:25:41,988 INFO L85 PathProgramCache]: Analyzing trace with hash 19395944, now seen corresponding path program 1 times [2022-10-15 17:25:41,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:25:41,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882208734] [2022-10-15 17:25:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:25:41,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:25:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:25:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:25:42,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:25:42,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882208734] [2022-10-15 17:25:42,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882208734] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:25:42,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:25:42,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:25:42,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022386591] [2022-10-15 17:25:42,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:25:42,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:25:42,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:25:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:25:42,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:42,136 INFO L87 Difference]: Start difference. First operand 6894 states and 8367 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:49,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:25:49,090 INFO L93 Difference]: Finished difference Result 7461 states and 8489 transitions. [2022-10-15 17:25:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:25:49,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:25:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:25:49,140 INFO L225 Difference]: With dead ends: 7461 [2022-10-15 17:25:49,140 INFO L226 Difference]: Without dead ends: 7461 [2022-10-15 17:25:49,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:49,143 INFO L413 NwaCegarLoop]: 4026 mSDtfsCounter, 6276 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 3547 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6276 SdHoareTripleChecker+Valid, 5210 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:25:49,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6276 Valid, 5210 Invalid, 3599 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 3547 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-10-15 17:25:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7461 states. [2022-10-15 17:25:49,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7461 to 6867. [2022-10-15 17:25:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6867 states, 3271 states have (on average 2.1339040048914706) internal successors, (6980), 6213 states have internal predecessors, (6980), 667 states have call successors, (667), 44 states have call predecessors, (667), 43 states have return successors, (667), 637 states have call predecessors, (667), 667 states have call successors, (667) [2022-10-15 17:25:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6867 states to 6867 states and 8314 transitions. [2022-10-15 17:25:49,519 INFO L78 Accepts]: Start accepts. Automaton has 6867 states and 8314 transitions. Word has length 4 [2022-10-15 17:25:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:25:49,520 INFO L495 AbstractCegarLoop]: Abstraction has 6867 states and 8314 transitions. [2022-10-15 17:25:49,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6867 states and 8314 transitions. [2022-10-15 17:25:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:25:49,521 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:25:49,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:25:49,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:25:49,522 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2966 more)] === [2022-10-15 17:25:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:25:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash 19395943, now seen corresponding path program 1 times [2022-10-15 17:25:49,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:25:49,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296131694] [2022-10-15 17:25:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:25:49,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:25:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:25:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:25:49,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:25:49,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296131694] [2022-10-15 17:25:49,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296131694] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:25:49,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:25:49,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:25:49,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277701512] [2022-10-15 17:25:49,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:25:49,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:25:49,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:25:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:25:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:49,617 INFO L87 Difference]: Start difference. First operand 6867 states and 8314 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:25:55,316 INFO L93 Difference]: Finished difference Result 7464 states and 8443 transitions. [2022-10-15 17:25:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:25:55,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:25:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:25:55,355 INFO L225 Difference]: With dead ends: 7464 [2022-10-15 17:25:55,355 INFO L226 Difference]: Without dead ends: 7464 [2022-10-15 17:25:55,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:55,357 INFO L413 NwaCegarLoop]: 4848 mSDtfsCounter, 6422 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 3550 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6422 SdHoareTripleChecker+Valid, 6029 SdHoareTripleChecker+Invalid, 3606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-10-15 17:25:55,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6422 Valid, 6029 Invalid, 3606 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 3550 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-10-15 17:25:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7464 states. [2022-10-15 17:25:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7464 to 6839. [2022-10-15 17:25:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6839 states, 3271 states have (on average 2.1167838581473557) internal successors, (6924), 6185 states have internal predecessors, (6924), 667 states have call successors, (667), 44 states have call predecessors, (667), 43 states have return successors, (667), 637 states have call predecessors, (667), 667 states have call successors, (667) [2022-10-15 17:25:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6839 states to 6839 states and 8258 transitions. [2022-10-15 17:25:55,678 INFO L78 Accepts]: Start accepts. Automaton has 6839 states and 8258 transitions. Word has length 4 [2022-10-15 17:25:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:25:55,679 INFO L495 AbstractCegarLoop]: Abstraction has 6839 states and 8258 transitions. [2022-10-15 17:25:55,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6839 states and 8258 transitions. [2022-10-15 17:25:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:25:55,681 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:25:55,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:25:55,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:25:55,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2966 more)] === [2022-10-15 17:25:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:25:55,682 INFO L85 PathProgramCache]: Analyzing trace with hash 601274812, now seen corresponding path program 1 times [2022-10-15 17:25:55,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:25:55,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204305951] [2022-10-15 17:25:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:25:55,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:25:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:25:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:25:55,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:25:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204305951] [2022-10-15 17:25:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204305951] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:25:55,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:25:55,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:25:55,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872950977] [2022-10-15 17:25:55,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:25:55,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:25:55,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:25:55,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:25:55,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:55,772 INFO L87 Difference]: Start difference. First operand 6839 states and 8258 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:26:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:26:02,089 INFO L93 Difference]: Finished difference Result 7409 states and 8387 transitions. [2022-10-15 17:26:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:26:02,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-15 17:26:02,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:26:02,113 INFO L225 Difference]: With dead ends: 7409 [2022-10-15 17:26:02,114 INFO L226 Difference]: Without dead ends: 7409 [2022-10-15 17:26:02,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:02,115 INFO L413 NwaCegarLoop]: 4796 mSDtfsCounter, 6366 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 3548 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6366 SdHoareTripleChecker+Valid, 5977 SdHoareTripleChecker+Invalid, 3604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:26:02,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6366 Valid, 5977 Invalid, 3604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3548 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-10-15 17:26:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2022-10-15 17:26:02,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 6811. [2022-10-15 17:26:02,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 3271 states have (on average 2.099663711403241) internal successors, (6868), 6157 states have internal predecessors, (6868), 667 states have call successors, (667), 44 states have call predecessors, (667), 43 states have return successors, (667), 637 states have call predecessors, (667), 667 states have call successors, (667) [2022-10-15 17:26:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 8202 transitions. [2022-10-15 17:26:02,425 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 8202 transitions. Word has length 5 [2022-10-15 17:26:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:26:02,426 INFO L495 AbstractCegarLoop]: Abstraction has 6811 states and 8202 transitions. [2022-10-15 17:26:02,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:26:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 8202 transitions. [2022-10-15 17:26:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:26:02,426 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:26:02,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:26:02,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:26:02,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2966 more)] === [2022-10-15 17:26:02,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:26:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash 601274813, now seen corresponding path program 1 times [2022-10-15 17:26:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:26:02,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075780441] [2022-10-15 17:26:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:26:02,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:26:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:26:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:26:02,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:26:02,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075780441] [2022-10-15 17:26:02,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075780441] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:26:02,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:26:02,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:26:02,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366828725] [2022-10-15 17:26:02,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:26:02,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:26:02,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:26:02,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:26:02,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:02,549 INFO L87 Difference]: Start difference. First operand 6811 states and 8202 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)