/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/rekcba_aso.1.M1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:25:19,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:25:19,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:25:19,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:25:19,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:25:19,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:25:19,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:25:19,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:25:19,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:25:19,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:25:19,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:25:19,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:25:19,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:25:19,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:25:19,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:25:19,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:25:19,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:25:19,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:25:19,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:25:19,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:25:19,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:25:19,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:25:19,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:25:19,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:25:19,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:25:19,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:25:19,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:25:19,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:25:19,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:25:19,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:25:19,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:25:19,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:25:19,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:25:19,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:25:19,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:25:19,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:25:19,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:25:19,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:25:19,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:25:19,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:25:19,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:25:19,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:25:19,675 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:25:19,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:25:19,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:25:19,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:25:19,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:25:19,678 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:25:19,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:25:19,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:25:19,680 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:25:19,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:25:19,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:25:19,681 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:25:19,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:25:19,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:25:19,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:25:19,682 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:25:19,683 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:25:19,683 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:25:19,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:25:19,684 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:25:19,684 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:25:19,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:25:19,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:25:19,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:25:19,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:25:19,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:25:19,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:25:19,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:25:19,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:25:19,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:25:19,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:25:20,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:25:20,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:25:20,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:25:20,426 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:25:20,428 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:25:20,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekcba_aso.1.M1-2.c [2022-10-15 17:25:20,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60618c1e9/57d1b82e7e804837a754d6b2861f1b1a/FLAGc53e74d8c [2022-10-15 17:25:21,576 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:25:21,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekcba_aso.1.M1-2.c [2022-10-15 17:25:21,613 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60618c1e9/57d1b82e7e804837a754d6b2861f1b1a/FLAGc53e74d8c [2022-10-15 17:25:21,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60618c1e9/57d1b82e7e804837a754d6b2861f1b1a [2022-10-15 17:25:21,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:25:21,691 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:25:21,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:25:21,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:25:21,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:25:21,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:25:21" (1/1) ... [2022-10-15 17:25:21,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320a2b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:21, skipping insertion in model container [2022-10-15 17:25:21,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:25:21" (1/1) ... [2022-10-15 17:25:21,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:25:21,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:25:22,068 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekcba_aso.1.M1-2.c[2055,2068] [2022-10-15 17:25:22,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:25:22,983 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:25:23,029 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekcba_aso.1.M1-2.c[2055,2068] [2022-10-15 17:25:23,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:25:23,540 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:25:23,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23 WrapperNode [2022-10-15 17:25:23,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:25:23,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:25:23,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:25:23,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:25:23,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:23,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:23,943 INFO L138 Inliner]: procedures = 62, calls = 2058, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 4377 [2022-10-15 17:25:23,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:25:23,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:25:23,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:25:23,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:25:23,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:23,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:24,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:24,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:24,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:24,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:24,292 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:24,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:24,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:25:24,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:25:24,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:25:24,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:25:24,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (1/1) ... [2022-10-15 17:25:24,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:25:24,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:25:24,503 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 17:25:24,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 17:25:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:25:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_forward [2022-10-15 17:25:24,582 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_forward [2022-10-15 17:25:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-10-15 17:25:24,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-10-15 17:25:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:25:24,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:25:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:25:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-10-15 17:25:24,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-10-15 17:25:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-10-15 17:25:24,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-10-15 17:25:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-10-15 17:25:24,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-10-15 17:25:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:25:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-10-15 17:25:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-10-15 17:25:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-10-15 17:25:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-10-15 17:25:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_turn [2022-10-15 17:25:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_turn [2022-10-15 17:25:24,648 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:25:24,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:25:24,648 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:25:24,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:25:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts3 [2022-10-15 17:25:24,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts3 [2022-10-15 17:25:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:25:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:25:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-10-15 17:25:24,650 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-10-15 17:25:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-10-15 17:25:24,650 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-10-15 17:25:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_cmd_forward [2022-10-15 17:25:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_cmd_forward [2022-10-15 17:25:24,651 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_obstacle_flag [2022-10-15 17:25:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_obstacle_flag [2022-10-15 17:25:24,651 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 17:25:24,651 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 17:25:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:25:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:25:24,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:25:24,652 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-10-15 17:25:24,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-10-15 17:25:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-10-15 17:25:24,653 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-10-15 17:25:24,653 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:25:24,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:25:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_cmd_turn [2022-10-15 17:25:24,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_cmd_turn [2022-10-15 17:25:25,236 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:25:25,240 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:25:33,533 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:25:33,590 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:25:33,591 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-15 17:25:33,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:25:33 BoogieIcfgContainer [2022-10-15 17:25:33,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:25:33,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:25:33,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:25:33,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:25:33,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:25:21" (1/3) ... [2022-10-15 17:25:33,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e01b9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:25:33, skipping insertion in model container [2022-10-15 17:25:33,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:25:23" (2/3) ... [2022-10-15 17:25:33,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e01b9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:25:33, skipping insertion in model container [2022-10-15 17:25:33,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:25:33" (3/3) ... [2022-10-15 17:25:33,689 INFO L112 eAbstractionObserver]: Analyzing ICFG rekcba_aso.1.M1-2.c [2022-10-15 17:25:33,723 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:25:33,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2968 error locations. [2022-10-15 17:25:33,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:25:33,944 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;@30345003, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:25:33,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2968 error locations. [2022-10-15 17:25:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 6069 states, 2598 states have (on average 2.2328714395688993) internal successors, (5801), 5596 states have internal predecessors, (5801), 481 states have call successors, (481), 21 states have call predecessors, (481), 21 states have return successors, (481), 479 states have call predecessors, (481), 481 states have call successors, (481) [2022-10-15 17:25:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:25:33,979 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:25:33,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:25:33,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2966 more)] === [2022-10-15 17:25:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:25:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash 627643, now seen corresponding path program 1 times [2022-10-15 17:25:34,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:25:34,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94702152] [2022-10-15 17:25:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:25:34,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:25:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:25:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:25:34,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:25:34,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94702152] [2022-10-15 17:25:34,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94702152] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:25:34,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:25:34,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:25:34,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751016868] [2022-10-15 17:25:34,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:25:34,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:25:34,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:25:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:25:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:34,690 INFO L87 Difference]: Start difference. First operand has 6069 states, 2598 states have (on average 2.2328714395688993) internal successors, (5801), 5596 states have internal predecessors, (5801), 481 states have call successors, (481), 21 states have call predecessors, (481), 21 states have return successors, (481), 479 states have call predecessors, (481), 481 states have call successors, (481) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:25:41,264 INFO L93 Difference]: Finished difference Result 7534 states and 8467 transitions. [2022-10-15 17:25:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:25:41,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-15 17:25:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:25:41,341 INFO L225 Difference]: With dead ends: 7534 [2022-10-15 17:25:41,341 INFO L226 Difference]: Without dead ends: 7530 [2022-10-15 17:25:41,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:41,350 INFO L413 NwaCegarLoop]: 4083 mSDtfsCounter, 6588 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 3661 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6588 SdHoareTripleChecker+Valid, 5265 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:25:41,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6588 Valid, 5265 Invalid, 3717 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 3661 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-10-15 17:25:41,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7530 states. [2022-10-15 17:25:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7530 to 6826. [2022-10-15 17:25:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6826 states, 3202 states have (on average 2.179887570268582) internal successors, (6980), 6197 states have internal predecessors, (6980), 649 states have call successors, (649), 36 states have call predecessors, (649), 35 states have return successors, (649), 619 states have call predecessors, (649), 649 states have call successors, (649) [2022-10-15 17:25:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6826 states to 6826 states and 8278 transitions. [2022-10-15 17:25:42,293 INFO L78 Accepts]: Start accepts. Automaton has 6826 states and 8278 transitions. Word has length 3 [2022-10-15 17:25:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:25:42,294 INFO L495 AbstractCegarLoop]: Abstraction has 6826 states and 8278 transitions. [2022-10-15 17:25:42,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:42,294 INFO L276 IsEmpty]: Start isEmpty. Operand 6826 states and 8278 transitions. [2022-10-15 17:25:42,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:25:42,295 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:25:42,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:25:42,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:25:42,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2966 more)] === [2022-10-15 17:25:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:25:42,298 INFO L85 PathProgramCache]: Analyzing trace with hash 627644, now seen corresponding path program 1 times [2022-10-15 17:25:42,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:25:42,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992012931] [2022-10-15 17:25:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:25:42,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:25:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:25:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:25:42,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:25:42,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992012931] [2022-10-15 17:25:42,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992012931] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:25:42,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:25:42,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:25:42,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702753770] [2022-10-15 17:25:42,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:25:42,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:25:42,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:25:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:25:42,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:42,553 INFO L87 Difference]: Start difference. First operand 6826 states and 8278 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:25:50,457 INFO L93 Difference]: Finished difference Result 7516 states and 8544 transitions. [2022-10-15 17:25:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:25:50,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-15 17:25:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:25:50,510 INFO L225 Difference]: With dead ends: 7516 [2022-10-15 17:25:50,510 INFO L226 Difference]: Without dead ends: 7516 [2022-10-15 17:25:50,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:50,513 INFO L413 NwaCegarLoop]: 4057 mSDtfsCounter, 6332 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 3545 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6332 SdHoareTripleChecker+Valid, 5241 SdHoareTripleChecker+Invalid, 3597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:25:50,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6332 Valid, 5241 Invalid, 3597 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 3545 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-10-15 17:25:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2022-10-15 17:25:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 6896. [2022-10-15 17:25:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6896 states, 3273 states have (on average 2.149404216315307) internal successors, (7035), 6241 states have internal predecessors, (7035), 667 states have call successors, (667), 44 states have call predecessors, (667), 43 states have return successors, (667), 637 states have call predecessors, (667), 667 states have call successors, (667) [2022-10-15 17:25:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6896 states to 6896 states and 8369 transitions. [2022-10-15 17:25:51,012 INFO L78 Accepts]: Start accepts. Automaton has 6896 states and 8369 transitions. Word has length 3 [2022-10-15 17:25:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:25:51,013 INFO L495 AbstractCegarLoop]: Abstraction has 6896 states and 8369 transitions. [2022-10-15 17:25:51,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 6896 states and 8369 transitions. [2022-10-15 17:25:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:25:51,015 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:25:51,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:25:51,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:25:51,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2966 more)] === [2022-10-15 17:25:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:25:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash 19457511, now seen corresponding path program 1 times [2022-10-15 17:25:51,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:25:51,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001046999] [2022-10-15 17:25:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:25:51,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:25:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:25:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:25:51,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:25:51,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001046999] [2022-10-15 17:25:51,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001046999] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:25:51,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:25:51,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:25:51,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002177263] [2022-10-15 17:25:51,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:25:51,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:25:51,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:25:51,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:25:51,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:51,153 INFO L87 Difference]: Start difference. First operand 6896 states and 8369 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:25:58,117 INFO L93 Difference]: Finished difference Result 7519 states and 8498 transitions. [2022-10-15 17:25:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:25:58,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:25:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:25:58,163 INFO L225 Difference]: With dead ends: 7519 [2022-10-15 17:25:58,164 INFO L226 Difference]: Without dead ends: 7519 [2022-10-15 17:25:58,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:58,167 INFO L413 NwaCegarLoop]: 4850 mSDtfsCounter, 6477 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 3603 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6477 SdHoareTripleChecker+Valid, 6031 SdHoareTripleChecker+Invalid, 3659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:25:58,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6477 Valid, 6031 Invalid, 3659 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 3603 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-10-15 17:25:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2022-10-15 17:25:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 6868. [2022-10-15 17:25:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6868 states, 3273 states have (on average 2.1322945310113046) internal successors, (6979), 6213 states have internal predecessors, (6979), 667 states have call successors, (667), 44 states have call predecessors, (667), 43 states have return successors, (667), 637 states have call predecessors, (667), 667 states have call successors, (667) [2022-10-15 17:25:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6868 states to 6868 states and 8313 transitions. [2022-10-15 17:25:58,705 INFO L78 Accepts]: Start accepts. Automaton has 6868 states and 8313 transitions. Word has length 4 [2022-10-15 17:25:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:25:58,706 INFO L495 AbstractCegarLoop]: Abstraction has 6868 states and 8313 transitions. [2022-10-15 17:25:58,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:25:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6868 states and 8313 transitions. [2022-10-15 17:25:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:25:58,708 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:25:58,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:25:58,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:25:58,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_read_cmd_forwardErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_read_cmd_forwardErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2966 more)] === [2022-10-15 17:25:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:25:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash 19457512, now seen corresponding path program 1 times [2022-10-15 17:25:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:25:58,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318538003] [2022-10-15 17:25:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:25:58,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:25:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:25:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:25:58,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:25:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318538003] [2022-10-15 17:25:58,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318538003] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:25:58,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:25:58,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:25:58,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291570505] [2022-10-15 17:25:58,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:25:58,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:25:58,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:25:58,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:25:58,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:25:58,953 INFO L87 Difference]: Start difference. First operand 6868 states and 8313 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)