/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.1.M1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:27:14,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:27:14,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:27:14,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:27:14,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:27:14,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:27:14,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:27:14,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:27:14,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:27:14,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:27:14,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:27:14,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:27:14,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:27:14,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:27:14,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:27:14,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:27:14,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:27:14,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:27:14,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:27:14,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:27:14,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:27:14,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:27:14,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:27:14,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:27:14,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:27:14,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:27:14,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:27:14,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:27:14,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:27:14,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:27:14,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:27:14,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:27:14,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:27:14,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:27:14,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:27:14,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:27:14,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:27:14,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:27:14,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:27:14,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:27:14,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:27:14,545 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 17:27:14,600 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:27:14,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:27:14,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:27:14,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:27:14,604 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:27:14,605 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:27:14,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:27:14,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:27:14,608 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:27:14,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:27:14,610 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:27:14,610 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:27:14,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:27:14,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:27:14,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:27:14,611 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:27:14,611 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:27:14,612 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:27:14,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:27:14,612 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:27:14,612 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:27:14,613 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:27:14,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:27:14,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:27:14,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:27:14,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:27:14,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:27:14,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:27:14,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:27:14,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:27:14,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:27:15,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:27:15,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:27:15,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:27:15,116 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:27:15,118 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:27:15,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekh_aso.1.M1-2.c [2022-10-15 17:27:15,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eff72a26c/60652d154ac14a43835a8c40b811c519/FLAGef3984638 [2022-10-15 17:27:16,167 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:27:16,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_aso.1.M1-2.c [2022-10-15 17:27:16,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eff72a26c/60652d154ac14a43835a8c40b811c519/FLAGef3984638 [2022-10-15 17:27:16,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eff72a26c/60652d154ac14a43835a8c40b811c519 [2022-10-15 17:27:16,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:27:16,322 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:27:16,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:27:16,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:27:16,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:27:16,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:27:16" (1/1) ... [2022-10-15 17:27:16,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156b6ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:16, skipping insertion in model container [2022-10-15 17:27:16,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:27:16" (1/1) ... [2022-10-15 17:27:16,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:27:16,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:27:16,594 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.1.M1-2.c[1719,1732] [2022-10-15 17:27:17,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:27:17,224 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:27:17,241 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.1.M1-2.c[1719,1732] [2022-10-15 17:27:17,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:27:17,508 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:27:17,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17 WrapperNode [2022-10-15 17:27:17,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:27:17,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:27:17,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:27:17,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:27:17,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:17,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:17,895 INFO L138 Inliner]: procedures = 58, calls = 3129, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 5929 [2022-10-15 17:27:17,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:27:17,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:27:17,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:27:17,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:27:17,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:17,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:17,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:17,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:18,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:18,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:18,293 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:18,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:18,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:27:18,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:27:18,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:27:18,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:27:18,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (1/1) ... [2022-10-15 17:27:18,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:27:18,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:27:18,471 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 17:27:18,496 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 17:27:18,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:27:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_forward [2022-10-15 17:27:18,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_forward [2022-10-15 17:27:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-10-15 17:27:18,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-10-15 17:27:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:27:18,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:27:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:27:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-10-15 17:27:18,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-10-15 17:27:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-10-15 17:27:18,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-10-15 17:27:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-10-15 17:27:18,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-10-15 17:27:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:27:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-10-15 17:27:18,556 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-10-15 17:27:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-10-15 17:27:18,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-10-15 17:27:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_turn [2022-10-15 17:27:18,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_turn [2022-10-15 17:27:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:27:18,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:27:18,557 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:27:18,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:27:18,557 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts3 [2022-10-15 17:27:18,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts3 [2022-10-15 17:27:18,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:27:18,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:27:18,558 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-10-15 17:27:18,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-10-15 17:27:18,558 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-10-15 17:27:18,558 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-10-15 17:27:18,558 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_forward [2022-10-15 17:27:18,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_forward [2022-10-15 17:27:18,559 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2022-10-15 17:27:18,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2022-10-15 17:27:18,559 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 17:27:18,559 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 17:27:18,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:27:18,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:27:18,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:27:18,560 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-10-15 17:27:18,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-10-15 17:27:18,560 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-10-15 17:27:18,560 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-10-15 17:27:18,560 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:27:18,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:27:18,561 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_turn [2022-10-15 17:27:18,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_turn [2022-10-15 17:27:19,183 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:27:19,186 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:27:28,708 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:27:28,744 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:27:28,744 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-15 17:27:28,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:27:28 BoogieIcfgContainer [2022-10-15 17:27:28,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:27:28,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:27:28,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:27:28,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:27:28,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:27:16" (1/3) ... [2022-10-15 17:27:28,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8fcc91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:27:28, skipping insertion in model container [2022-10-15 17:27:28,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:27:17" (2/3) ... [2022-10-15 17:27:28,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8fcc91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:27:28, skipping insertion in model container [2022-10-15 17:27:28,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:27:28" (3/3) ... [2022-10-15 17:27:28,768 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_aso.1.M1-2.c [2022-10-15 17:27:28,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:27:28,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4276 error locations. [2022-10-15 17:27:28,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:27:28,965 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;@41a62cd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:27:28,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4276 error locations. [2022-10-15 17:27:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 9033 states, 3797 states have (on average 2.1977877271530155) internal successors, (8345), 8077 states have internal predecessors, (8345), 938 states have call successors, (938), 21 states have call predecessors, (938), 21 states have return successors, (938), 936 states have call predecessors, (938), 938 states have call successors, (938) [2022-10-15 17:27:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:27:28,999 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:29,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:27:29,001 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 17:27:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1279051, now seen corresponding path program 1 times [2022-10-15 17:27:29,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:29,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507694681] [2022-10-15 17:27:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:29,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:29,461 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 17:27:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:29,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507694681] [2022-10-15 17:27:29,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507694681] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:29,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:29,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:29,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710981971] [2022-10-15 17:27:29,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:29,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:29,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:29,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:29,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:29,568 INFO L87 Difference]: Start difference. First operand has 9033 states, 3797 states have (on average 2.1977877271530155) internal successors, (8345), 8077 states have internal predecessors, (8345), 938 states have call successors, (938), 21 states have call predecessors, (938), 21 states have return successors, (938), 936 states have call predecessors, (938), 938 states have call successors, (938) 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 17:27:36,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:27:36,898 INFO L93 Difference]: Finished difference Result 9712 states and 11058 transitions. [2022-10-15 17:27:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:27:36,901 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 17:27:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:27:36,979 INFO L225 Difference]: With dead ends: 9712 [2022-10-15 17:27:36,979 INFO L226 Difference]: Without dead ends: 9710 [2022-10-15 17:27:36,982 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 17:27:36,987 INFO L413 NwaCegarLoop]: 8109 mSDtfsCounter, 4861 mSDsluCounter, 3696 mSDsCounter, 0 mSdLazyCounter, 4666 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4861 SdHoareTripleChecker+Valid, 11805 SdHoareTripleChecker+Invalid, 4695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:27:36,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4861 Valid, 11805 Invalid, 4695 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 4666 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-10-15 17:27:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9710 states. [2022-10-15 17:27:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9710 to 9451. [2022-10-15 17:27:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9451 states, 4140 states have (on average 2.1719806763285026) internal successors, (8992), 8395 states have internal predecessors, (8992), 1027 states have call successors, (1027), 36 states have call predecessors, (1027), 35 states have return successors, (1027), 1021 states have call predecessors, (1027), 1027 states have call successors, (1027) [2022-10-15 17:27:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9451 states to 9451 states and 11046 transitions. [2022-10-15 17:27:38,043 INFO L78 Accepts]: Start accepts. Automaton has 9451 states and 11046 transitions. Word has length 3 [2022-10-15 17:27:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:27:38,044 INFO L495 AbstractCegarLoop]: Abstraction has 9451 states and 11046 transitions. [2022-10-15 17:27:38,044 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 17:27:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9451 states and 11046 transitions. [2022-10-15 17:27:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:27:38,045 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:38,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:27:38,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:27:38,046 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 17:27:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:38,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1279052, now seen corresponding path program 1 times [2022-10-15 17:27:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:38,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386131570] [2022-10-15 17:27:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:38,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:38,279 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 17:27:38,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:38,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386131570] [2022-10-15 17:27:38,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386131570] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:38,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:38,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:38,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777336505] [2022-10-15 17:27:38,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:38,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:38,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:38,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:38,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:38,295 INFO L87 Difference]: Start difference. First operand 9451 states and 11046 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 17:27:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:27:46,338 INFO L93 Difference]: Finished difference Result 9428 states and 11022 transitions. [2022-10-15 17:27:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:27:46,339 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 17:27:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:27:46,395 INFO L225 Difference]: With dead ends: 9428 [2022-10-15 17:27:46,395 INFO L226 Difference]: Without dead ends: 9428 [2022-10-15 17:27:46,396 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 17:27:46,398 INFO L413 NwaCegarLoop]: 8276 mSDtfsCounter, 3974 mSDsluCounter, 3698 mSDsCounter, 0 mSdLazyCounter, 4377 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3974 SdHoareTripleChecker+Valid, 11974 SdHoareTripleChecker+Invalid, 4403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:27:46,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3974 Valid, 11974 Invalid, 4403 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 4377 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-10-15 17:27:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9428 states. [2022-10-15 17:27:47,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9428 to 9428. [2022-10-15 17:27:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9428 states, 4143 states have (on average 2.1646150132754043) internal successors, (8968), 8371 states have internal predecessors, (8968), 1027 states have call successors, (1027), 37 states have call predecessors, (1027), 36 states have return successors, (1027), 1021 states have call predecessors, (1027), 1027 states have call successors, (1027) [2022-10-15 17:27:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9428 states to 9428 states and 11022 transitions. [2022-10-15 17:27:47,207 INFO L78 Accepts]: Start accepts. Automaton has 9428 states and 11022 transitions. Word has length 3 [2022-10-15 17:27:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:27:47,207 INFO L495 AbstractCegarLoop]: Abstraction has 9428 states and 11022 transitions. [2022-10-15 17:27:47,208 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 17:27:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 9428 states and 11022 transitions. [2022-10-15 17:27:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:27:47,209 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:47,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:27:47,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:27:47,210 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 17:27:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash 39651815, now seen corresponding path program 1 times [2022-10-15 17:27:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:47,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349843929] [2022-10-15 17:27:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:47,300 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 17:27:47,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:47,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349843929] [2022-10-15 17:27:47,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349843929] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:47,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:47,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:47,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653989440] [2022-10-15 17:27:47,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:47,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:47,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:47,304 INFO L87 Difference]: Start difference. First operand 9428 states and 11022 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 17:27:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:27:54,200 INFO L93 Difference]: Finished difference Result 9659 states and 11004 transitions. [2022-10-15 17:27:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:27:54,205 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 17:27:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:27:54,250 INFO L225 Difference]: With dead ends: 9659 [2022-10-15 17:27:54,251 INFO L226 Difference]: Without dead ends: 9659 [2022-10-15 17:27:54,251 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 17:27:54,253 INFO L413 NwaCegarLoop]: 8081 mSDtfsCounter, 4805 mSDsluCounter, 3695 mSDsCounter, 0 mSdLazyCounter, 4637 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4805 SdHoareTripleChecker+Valid, 11776 SdHoareTripleChecker+Invalid, 4666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:27:54,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4805 Valid, 11776 Invalid, 4666 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 4637 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-10-15 17:27:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2022-10-15 17:27:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 9401. [2022-10-15 17:27:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9401 states, 4143 states have (on average 2.157856625633599) internal successors, (8940), 8344 states have internal predecessors, (8940), 1027 states have call successors, (1027), 37 states have call predecessors, (1027), 36 states have return successors, (1027), 1021 states have call predecessors, (1027), 1027 states have call successors, (1027) [2022-10-15 17:27:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9401 states to 9401 states and 10994 transitions. [2022-10-15 17:27:54,878 INFO L78 Accepts]: Start accepts. Automaton has 9401 states and 10994 transitions. Word has length 4 [2022-10-15 17:27:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:27:54,879 INFO L495 AbstractCegarLoop]: Abstraction has 9401 states and 10994 transitions. [2022-10-15 17:27:54,879 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 17:27:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 9401 states and 10994 transitions. [2022-10-15 17:27:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:27:54,880 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:54,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:27:54,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:27:54,881 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4274 more)] === [2022-10-15 17:27:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash 39651816, now seen corresponding path program 1 times [2022-10-15 17:27:54,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:54,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728314357] [2022-10-15 17:27:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:54,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:55,051 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 17:27:55,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:55,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728314357] [2022-10-15 17:27:55,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728314357] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:55,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:55,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:55,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16266478] [2022-10-15 17:27:55,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:55,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:55,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:55,055 INFO L87 Difference]: Start difference. First operand 9401 states and 10994 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 17:28:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:05,017 INFO L93 Difference]: Finished difference Result 9374 states and 10967 transitions. [2022-10-15 17:28:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:05,019 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 17:28:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:05,051 INFO L225 Difference]: With dead ends: 9374 [2022-10-15 17:28:05,051 INFO L226 Difference]: Without dead ends: 9374 [2022-10-15 17:28:05,052 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 17:28:05,053 INFO L413 NwaCegarLoop]: 8249 mSDtfsCounter, 3919 mSDsluCounter, 3698 mSDsCounter, 0 mSdLazyCounter, 4350 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3919 SdHoareTripleChecker+Valid, 11947 SdHoareTripleChecker+Invalid, 4376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:05,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3919 Valid, 11947 Invalid, 4376 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 4350 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-10-15 17:28:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9374 states. [2022-10-15 17:28:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9374 to 9374. [2022-10-15 17:28:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9374 states, 4143 states have (on average 2.1513396089790007) internal successors, (8913), 8317 states have internal predecessors, (8913), 1027 states have call successors, (1027), 37 states have call predecessors, (1027), 36 states have return successors, (1027), 1021 states have call predecessors, (1027), 1027 states have call successors, (1027) [2022-10-15 17:28:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9374 states to 9374 states and 10967 transitions. [2022-10-15 17:28:05,691 INFO L78 Accepts]: Start accepts. Automaton has 9374 states and 10967 transitions. Word has length 4 [2022-10-15 17:28:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:05,692 INFO L495 AbstractCegarLoop]: Abstraction has 9374 states and 10967 transitions. [2022-10-15 17:28:05,692 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 17:28:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 9374 states and 10967 transitions. [2022-10-15 17:28:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:28:05,693 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:05,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:28:05,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:28:05,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4274 more)] === [2022-10-15 17:28:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:05,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1229207502, now seen corresponding path program 1 times [2022-10-15 17:28:05,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:05,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406410640] [2022-10-15 17:28:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:05,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:05,773 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 17:28:05,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406410640] [2022-10-15 17:28:05,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406410640] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:05,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:05,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:05,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853137120] [2022-10-15 17:28:05,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:05,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:05,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:05,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:05,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:05,780 INFO L87 Difference]: Start difference. First operand 9374 states and 10967 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)