/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/rekh_aso.2.M1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:27:23,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:27:23,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:27:23,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:27:23,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:27:23,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:27:23,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:27:23,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:27:23,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:27:23,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:27:23,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:27:23,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:27:23,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:27:23,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:27:23,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:27:23,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:27:23,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:27:23,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:27:23,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:27:23,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:27:23,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:27:23,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:27:23,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:27:23,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:27:23,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:27:23,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:27:23,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:27:23,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:27:23,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:27:23,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:27:23,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:27:23,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:27:23,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:27:23,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:27:23,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:27:23,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:27:23,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:27:23,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:27:23,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:27:23,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:27:23,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:27:23,255 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 17:27:23,288 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:27:23,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:27:23,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:27:23,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:27:23,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:27:23,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:27:23,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:27:23,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:27:23,292 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:27:23,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:27:23,293 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:27:23,293 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:27:23,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:27:23,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:27:23,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:27:23,294 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:27:23,294 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:27:23,294 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:27:23,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:27:23,295 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:27:23,295 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:27:23,295 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:27:23,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:27:23,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:27:23,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:27:23,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:27:23,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:27:23,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:27:23,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:27:23,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:27:23,297 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:27:23,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:27:23,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:27:23,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:27:23,744 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:27:23,745 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:27:23,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M1-2.c [2022-10-15 17:27:23,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/331f3ed60/46e5162d42374440af21622bd172f62e/FLAGb5522facd [2022-10-15 17:27:24,753 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:27:24,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_aso.2.M1-2.c [2022-10-15 17:27:24,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/331f3ed60/46e5162d42374440af21622bd172f62e/FLAGb5522facd [2022-10-15 17:27:25,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/331f3ed60/46e5162d42374440af21622bd172f62e [2022-10-15 17:27:25,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:27:25,340 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:27:25,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:27:25,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:27:25,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:27:25,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:27:25" (1/1) ... [2022-10-15 17:27:25,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fea52ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:25, skipping insertion in model container [2022-10-15 17:27:25,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:27:25" (1/1) ... [2022-10-15 17:27:25,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:27:25,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:27:25,711 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_aso.2.M1-2.c[1974,1987] [2022-10-15 17:27:26,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:27:26,399 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:27:26,434 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_aso.2.M1-2.c[1974,1987] [2022-10-15 17:27:26,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:27:26,789 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:27:26,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26 WrapperNode [2022-10-15 17:27:26,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:27:26,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:27:26,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:27:26,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:27:26,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:26,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:27,264 INFO L138 Inliner]: procedures = 61, calls = 3158, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 6014 [2022-10-15 17:27:27,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:27:27,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:27:27,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:27:27,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:27:27,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:27,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:27,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:27,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:27,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:27,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:27,798 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:27,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:27,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:27:27,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:27:27,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:27:27,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:27:27,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (1/1) ... [2022-10-15 17:27:27,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:27:27,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:27:27,931 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 17:27:27,957 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 17:27:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:27:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_forward [2022-10-15 17:27:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_forward [2022-10-15 17:27:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-10-15 17:27:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-10-15 17:27:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:27:28,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:27:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:27:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-10-15 17:27:28,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-10-15 17:27:28,027 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-10-15 17:27:28,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-10-15 17:27:28,027 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-10-15 17:27:28,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-10-15 17:27:28,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:27:28,027 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-10-15 17:27:28,028 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-10-15 17:27:28,028 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-10-15 17:27:28,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-10-15 17:27:28,028 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_turn [2022-10-15 17:27:28,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_turn [2022-10-15 17:27:28,028 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:27:28,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:27:28,029 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:27:28,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:27:28,029 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts3 [2022-10-15 17:27:28,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts3 [2022-10-15 17:27:28,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:27:28,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:27:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-10-15 17:27:28,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-10-15 17:27:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-10-15 17:27:28,030 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-10-15 17:27:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_forward [2022-10-15 17:27:28,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_forward [2022-10-15 17:27:28,030 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2022-10-15 17:27:28,031 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2022-10-15 17:27:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 17:27:28,031 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 17:27:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:27:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:27:28,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:27:28,031 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-10-15 17:27:28,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-10-15 17:27:28,032 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-10-15 17:27:28,032 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-10-15 17:27:28,032 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:27:28,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:27:28,032 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_turn [2022-10-15 17:27:28,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_turn [2022-10-15 17:27:28,864 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:27:28,867 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:27:40,960 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:27:41,026 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:27:41,027 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-15 17:27:41,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:27:41 BoogieIcfgContainer [2022-10-15 17:27:41,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:27:41,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:27:41,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:27:41,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:27:41,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:27:25" (1/3) ... [2022-10-15 17:27:41,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7234c21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:27:41, skipping insertion in model container [2022-10-15 17:27:41,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:26" (2/3) ... [2022-10-15 17:27:41,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7234c21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:27:41, skipping insertion in model container [2022-10-15 17:27:41,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:27:41" (3/3) ... [2022-10-15 17:27:41,063 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_aso.2.M1-2.c [2022-10-15 17:27:41,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:27:41,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4276 error locations. [2022-10-15 17:27:41,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:27:41,380 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;@31677b12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:27:41,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4276 error locations. [2022-10-15 17:27:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 9071 states, 3807 states have (on average 2.1959548200682955) internal successors, (8360), 8086 states have internal predecessors, (8360), 966 states have call successors, (966), 21 states have call predecessors, (966), 21 states have return successors, (966), 964 states have call predecessors, (966), 966 states have call successors, (966) [2022-10-15 17:27:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:27:41,428 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:41,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:27:41,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4274 more)] === [2022-10-15 17:27:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:41,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1312813, now seen corresponding path program 1 times [2022-10-15 17:27:41,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:41,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112130766] [2022-10-15 17:27:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:41,976 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 17:27:41,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112130766] [2022-10-15 17:27:41,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112130766] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:41,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:41,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:41,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434443073] [2022-10-15 17:27:41,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:41,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:41,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:42,063 INFO L87 Difference]: Start difference. First operand has 9071 states, 3807 states have (on average 2.1959548200682955) internal successors, (8360), 8086 states have internal predecessors, (8360), 966 states have call successors, (966), 21 states have call predecessors, (966), 21 states have return successors, (966), 964 states have call predecessors, (966), 966 states have call successors, (966) 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 17:27:52,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:27:52,066 INFO L93 Difference]: Finished difference Result 9750 states and 11129 transitions. [2022-10-15 17:27:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:27:52,070 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 17:27:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:27:52,163 INFO L225 Difference]: With dead ends: 9750 [2022-10-15 17:27:52,163 INFO L226 Difference]: Without dead ends: 9748 [2022-10-15 17:27:52,166 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 17:27:52,171 INFO L413 NwaCegarLoop]: 8180 mSDtfsCounter, 4861 mSDsluCounter, 3767 mSDsCounter, 0 mSdLazyCounter, 4666 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4861 SdHoareTripleChecker+Valid, 11947 SdHoareTripleChecker+Invalid, 4695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:27:52,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4861 Valid, 11947 Invalid, 4695 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [29 Valid, 4666 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-10-15 17:27:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9748 states. [2022-10-15 17:27:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9748 to 9489. [2022-10-15 17:27:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9489 states, 4150 states have (on average 2.1703614457831324) internal successors, (9007), 8404 states have internal predecessors, (9007), 1055 states have call successors, (1055), 36 states have call predecessors, (1055), 35 states have return successors, (1055), 1049 states have call predecessors, (1055), 1055 states have call successors, (1055) [2022-10-15 17:27:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9489 states to 9489 states and 11117 transitions. [2022-10-15 17:27:53,545 INFO L78 Accepts]: Start accepts. Automaton has 9489 states and 11117 transitions. Word has length 3 [2022-10-15 17:27:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:27:53,546 INFO L495 AbstractCegarLoop]: Abstraction has 9489 states and 11117 transitions. [2022-10-15 17:27:53,546 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 17:27:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 9489 states and 11117 transitions. [2022-10-15 17:27:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:27:53,547 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:53,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:27:53,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:27:53,548 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4274 more)] === [2022-10-15 17:27:53,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:53,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1312814, now seen corresponding path program 1 times [2022-10-15 17:27:53,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:53,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69911049] [2022-10-15 17:27:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:53,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:53,715 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 17:27:53,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:53,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69911049] [2022-10-15 17:27:53,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69911049] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:53,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:53,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:53,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286107623] [2022-10-15 17:27:53,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:53,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:53,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:53,721 INFO L87 Difference]: Start difference. First operand 9489 states and 11117 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 17:28:05,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:05,066 INFO L93 Difference]: Finished difference Result 9466 states and 11093 transitions. [2022-10-15 17:28:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:05,068 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 17:28:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:05,128 INFO L225 Difference]: With dead ends: 9466 [2022-10-15 17:28:05,128 INFO L226 Difference]: Without dead ends: 9466 [2022-10-15 17:28:05,129 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 17:28:05,131 INFO L413 NwaCegarLoop]: 8347 mSDtfsCounter, 3974 mSDsluCounter, 3769 mSDsCounter, 0 mSdLazyCounter, 4377 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3974 SdHoareTripleChecker+Valid, 12116 SdHoareTripleChecker+Invalid, 4403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:05,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3974 Valid, 12116 Invalid, 4403 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 4377 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-10-15 17:28:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9466 states. [2022-10-15 17:28:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9466 to 9466. [2022-10-15 17:28:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9466 states, 4153 states have (on average 2.1630146881772214) internal successors, (8983), 8380 states have internal predecessors, (8983), 1055 states have call successors, (1055), 37 states have call predecessors, (1055), 36 states have return successors, (1055), 1049 states have call predecessors, (1055), 1055 states have call successors, (1055) [2022-10-15 17:28:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9466 states to 9466 states and 11093 transitions. [2022-10-15 17:28:06,002 INFO L78 Accepts]: Start accepts. Automaton has 9466 states and 11093 transitions. Word has length 3 [2022-10-15 17:28:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:06,003 INFO L495 AbstractCegarLoop]: Abstraction has 9466 states and 11093 transitions. [2022-10-15 17:28:06,004 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 17:28:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 9466 states and 11093 transitions. [2022-10-15 17:28:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:28:06,005 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:06,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:28:06,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:28:06,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4274 more)] === [2022-10-15 17:28:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash 40698471, now seen corresponding path program 1 times [2022-10-15 17:28:06,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:06,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884783249] [2022-10-15 17:28:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:06,198 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 17:28:06,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:06,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884783249] [2022-10-15 17:28:06,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884783249] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:06,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:06,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:06,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708550526] [2022-10-15 17:28:06,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:06,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:06,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:06,210 INFO L87 Difference]: Start difference. First operand 9466 states and 11093 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)