/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_ctm.3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:28:12,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:28:12,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:28:12,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:28:12,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:28:12,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:28:12,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:28:12,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:28:12,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:28:12,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:28:12,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:28:12,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:28:12,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:28:12,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:28:12,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:28:12,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:28:12,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:28:12,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:28:12,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:28:12,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:28:12,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:28:12,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:28:12,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:28:12,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:28:12,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:28:12,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:28:12,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:28:12,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:28:12,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:28:12,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:28:12,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:28:12,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:28:12,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:28:12,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:28:12,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:28:12,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:28:12,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:28:12,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:28:12,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:28:12,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:28:12,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:28:12,923 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 17:28:12,985 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:28:12,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:28:12,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:28:12,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:28:12,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:28:12,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:28:12,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:28:12,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:28:12,993 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:28:12,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:28:12,994 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:28:12,995 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:28:12,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:28:12,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:28:12,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:28:12,995 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:28:12,996 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:28:12,996 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:28:12,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:28:12,996 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:28:12,997 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:28:12,997 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:28:12,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:28:12,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:28:12,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:28:12,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:28:12,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:28:12,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:28:12,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:28:12,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:28:12,999 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:28:13,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:28:13,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:28:13,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:28:13,538 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:28:13,538 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:28:13,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekh_ctm.3-2.c [2022-10-15 17:28:13,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbf6bd505/f383941bf15b40acb730a484d3837b60/FLAGbd4c0dc81 [2022-10-15 17:28:14,556 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:28:14,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_ctm.3-2.c [2022-10-15 17:28:14,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbf6bd505/f383941bf15b40acb730a484d3837b60/FLAGbd4c0dc81 [2022-10-15 17:28:15,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbf6bd505/f383941bf15b40acb730a484d3837b60 [2022-10-15 17:28:15,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:28:15,119 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:28:15,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:28:15,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:28:15,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:28:15,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:28:15" (1/1) ... [2022-10-15 17:28:15,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@add2514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:15, skipping insertion in model container [2022-10-15 17:28:15,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:28:15" (1/1) ... [2022-10-15 17:28:15,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:28:15,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:28:15,597 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_ctm.3-2.c[1871,1884] [2022-10-15 17:28:16,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:28:16,477 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:28:16,499 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_ctm.3-2.c[1871,1884] [2022-10-15 17:28:16,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:28:16,911 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:28:16,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16 WrapperNode [2022-10-15 17:28:16,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:28:16,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:28:16,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:28:16,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:28:16,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,388 INFO L138 Inliner]: procedures = 99, calls = 2816, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 8376 [2022-10-15 17:28:17,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:28:17,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:28:17,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:28:17,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:28:17,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,792 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:28:17,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:28:17,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:28:17,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:28:17,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (1/1) ... [2022-10-15 17:28:17,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:28:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:28:17,939 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 17:28:17,942 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 17:28:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_W_state [2022-10-15 17:28:18,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_W_state [2022-10-15 17:28:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_T_state [2022-10-15 17:28:18,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_T_state [2022-10-15 17:28:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:28:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_need_to_run_nxtbg [2022-10-15 17:28:18,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_need_to_run_nxtbg [2022-10-15 17:28:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-10-15 17:28:18,004 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-10-15 17:28:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write___startrek_current_priority [2022-10-15 17:28:18,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write___startrek_current_priority [2022-10-15 17:28:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_input [2022-10-15 17:28:18,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_input [2022-10-15 17:28:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2022-10-15 17:28:18,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2022-10-15 17:28:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure bg_nxtcolorsensor [2022-10-15 17:28:18,006 INFO L138 BoogieDeclarations]: Found implementation of procedure bg_nxtcolorsensor [2022-10-15 17:28:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_Writer [2022-10-15 17:28:18,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_Writer [2022-10-15 17:28:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtcolorsensor_mode [2022-10-15 17:28:18,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtcolorsensor_mode [2022-10-15 17:28:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:28:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-10-15 17:28:18,007 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-10-15 17:28:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_R_count [2022-10-15 17:28:18,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_R_count [2022-10-15 17:28:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_T_state [2022-10-15 17:28:18,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_T_state [2022-10-15 17:28:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_output [2022-10-15 17:28:18,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_output [2022-10-15 17:28:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure move_motor [2022-10-15 17:28:18,008 INFO L138 BoogieDeclarations]: Found implementation of procedure move_motor [2022-10-15 17:28:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_R_speed [2022-10-15 17:28:18,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_R_speed [2022-10-15 17:28:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-10-15 17:28:18,008 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-10-15 17:28:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:28:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-10-15 17:28:18,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-10-15 17:28:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_set_nxtcolorsensor [2022-10-15 17:28:18,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_set_nxtcolorsensor [2022-10-15 17:28:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t3 [2022-10-15 17:28:18,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t3 [2022-10-15 17:28:18,010 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_output [2022-10-15 17:28:18,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_output [2022-10-15 17:28:18,010 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-10-15 17:28:18,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-10-15 17:28:18,010 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_T_count [2022-10-15 17:28:18,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_T_count [2022-10-15 17:28:18,010 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-10-15 17:28:18,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-10-15 17:28:18,011 INFO L130 BoogieDeclarations]: Found specification of procedure TerminateTask [2022-10-15 17:28:18,011 INFO L138 BoogieDeclarations]: Found implementation of procedure TerminateTask [2022-10-15 17:28:18,011 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_W_count [2022-10-15 17:28:18,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_W_count [2022-10-15 17:28:18,011 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read___startrek_current_priority [2022-10-15 17:28:18,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read___startrek_current_priority [2022-10-15 17:28:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_W_count [2022-10-15 17:28:18,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_W_count [2022-10-15 17:28:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_T_count [2022-10-15 17:28:18,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_T_count [2022-10-15 17:28:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_T_speed [2022-10-15 17:28:18,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_T_speed [2022-10-15 17:28:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtcolorsensor_data_mode [2022-10-15 17:28:18,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtcolorsensor_data_mode [2022-10-15 17:28:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_threshold [2022-10-15 17:28:18,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_threshold [2022-10-15 17:28:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_need_to_read [2022-10-15 17:28:18,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_need_to_read [2022-10-15 17:28:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_R_state [2022-10-15 17:28:18,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_R_state [2022-10-15 17:28:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_Reader [2022-10-15 17:28:18,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_Reader [2022-10-15 17:28:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_dir [2022-10-15 17:28:18,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_dir [2022-10-15 17:28:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_W_speed [2022-10-15 17:28:18,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_W_speed [2022-10-15 17:28:18,015 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_input [2022-10-15 17:28:18,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_input [2022-10-15 17:28:18,015 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_R_state [2022-10-15 17:28:18,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_R_state [2022-10-15 17:28:18,015 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_need_to_run_nxtbg [2022-10-15 17:28:18,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_need_to_run_nxtbg [2022-10-15 17:28:18,016 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_W_state [2022-10-15 17:28:18,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_W_state [2022-10-15 17:28:18,016 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_R_count [2022-10-15 17:28:18,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_R_count [2022-10-15 17:28:18,016 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_TapeMover [2022-10-15 17:28:18,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_TapeMover [2022-10-15 17:28:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:28:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_Controller [2022-10-15 17:28:18,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_Controller [2022-10-15 17:28:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:28:18,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:28:18,665 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:28:18,670 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:28:27,886 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:28:27,936 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:28:27,936 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-15 17:28:27,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:28:27 BoogieIcfgContainer [2022-10-15 17:28:27,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:28:27,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:28:27,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:28:27,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:28:27,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:28:15" (1/3) ... [2022-10-15 17:28:27,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433abb3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:28:27, skipping insertion in model container [2022-10-15 17:28:27,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:16" (2/3) ... [2022-10-15 17:28:27,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433abb3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:28:27, skipping insertion in model container [2022-10-15 17:28:27,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:28:27" (3/3) ... [2022-10-15 17:28:27,960 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_ctm.3-2.c [2022-10-15 17:28:27,985 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:28:27,986 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4166 error locations. [2022-10-15 17:28:28,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:28:28,281 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;@2530160e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:28:28,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4166 error locations. [2022-10-15 17:28:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 8513 states, 3996 states have (on average 2.2962962962962963) internal successors, (9176), 8185 states have internal predecessors, (9176), 306 states have call successors, (306), 44 states have call predecessors, (306), 44 states have return successors, (306), 296 states have call predecessors, (306), 306 states have call successors, (306) [2022-10-15 17:28:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:28:28,333 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:28,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:28:28,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_cs_t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4163 more)] === [2022-10-15 17:28:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:28,347 INFO L85 PathProgramCache]: Analyzing trace with hash 12377812, now seen corresponding path program 1 times [2022-10-15 17:28:28,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:28,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850038686] [2022-10-15 17:28:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:28,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:29,250 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 17:28:29,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:29,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850038686] [2022-10-15 17:28:29,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850038686] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:29,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:29,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:29,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568047449] [2022-10-15 17:28:29,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:29,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:29,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:29,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:29,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:29,432 INFO L87 Difference]: Start difference. First operand has 8513 states, 3996 states have (on average 2.2962962962962963) internal successors, (9176), 8185 states have internal predecessors, (9176), 306 states have call successors, (306), 44 states have call predecessors, (306), 44 states have return successors, (306), 296 states have call predecessors, (306), 306 states have call successors, (306) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:35,834 INFO L93 Difference]: Finished difference Result 8463 states and 9046 transitions. [2022-10-15 17:28:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:35,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-15 17:28:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:35,943 INFO L225 Difference]: With dead ends: 8463 [2022-10-15 17:28:35,944 INFO L226 Difference]: Without dead ends: 8457 [2022-10-15 17:28:35,946 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 17:28:35,955 INFO L413 NwaCegarLoop]: 4879 mSDtfsCounter, 9044 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4167 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9044 SdHoareTripleChecker+Valid, 4879 SdHoareTripleChecker+Invalid, 4212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 4167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:35,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9044 Valid, 4879 Invalid, 4212 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [45 Valid, 4167 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-10-15 17:28:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8457 states. [2022-10-15 17:28:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8457 to 8457. [2022-10-15 17:28:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8457 states, 3987 states have (on average 2.113870077752696) internal successors, (8428), 8129 states have internal predecessors, (8428), 306 states have call successors, (306), 44 states have call predecessors, (306), 44 states have return successors, (306), 296 states have call predecessors, (306), 306 states have call successors, (306) [2022-10-15 17:28:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8457 states to 8457 states and 9040 transitions. [2022-10-15 17:28:36,609 INFO L78 Accepts]: Start accepts. Automaton has 8457 states and 9040 transitions. Word has length 3 [2022-10-15 17:28:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:36,609 INFO L495 AbstractCegarLoop]: Abstraction has 8457 states and 9040 transitions. [2022-10-15 17:28:36,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8457 states and 9040 transitions. [2022-10-15 17:28:36,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:28:36,611 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:36,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:28:36,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:28:36,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_cs_t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4163 more)] === [2022-10-15 17:28:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:36,613 INFO L85 PathProgramCache]: Analyzing trace with hash 12377813, now seen corresponding path program 1 times [2022-10-15 17:28:36,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:36,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073192482] [2022-10-15 17:28:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:36,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:37,013 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 17:28:37,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:37,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073192482] [2022-10-15 17:28:37,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073192482] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:37,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:37,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:37,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89639691] [2022-10-15 17:28:37,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:37,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:37,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:37,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:37,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:37,019 INFO L87 Difference]: Start difference. First operand 8457 states and 9040 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:44,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:44,466 INFO L93 Difference]: Finished difference Result 8413 states and 8996 transitions. [2022-10-15 17:28:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-15 17:28:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:44,528 INFO L225 Difference]: With dead ends: 8413 [2022-10-15 17:28:44,529 INFO L226 Difference]: Without dead ends: 8413 [2022-10-15 17:28:44,529 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 17:28:44,531 INFO L413 NwaCegarLoop]: 4876 mSDtfsCounter, 8994 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4120 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8994 SdHoareTripleChecker+Valid, 4876 SdHoareTripleChecker+Invalid, 4163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:44,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8994 Valid, 4876 Invalid, 4163 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [43 Valid, 4120 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-10-15 17:28:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8413 states. [2022-10-15 17:28:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8413 to 8413. [2022-10-15 17:28:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8413 states, 3987 states have (on average 2.1028342111863556) internal successors, (8384), 8085 states have internal predecessors, (8384), 306 states have call successors, (306), 44 states have call predecessors, (306), 44 states have return successors, (306), 296 states have call predecessors, (306), 306 states have call successors, (306) [2022-10-15 17:28:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8413 states to 8413 states and 8996 transitions. [2022-10-15 17:28:44,946 INFO L78 Accepts]: Start accepts. Automaton has 8413 states and 8996 transitions. Word has length 3 [2022-10-15 17:28:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:44,948 INFO L495 AbstractCegarLoop]: Abstraction has 8413 states and 8996 transitions. [2022-10-15 17:28:44,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 8413 states and 8996 transitions. [2022-10-15 17:28:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:28:44,950 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:44,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:28:44,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:28:44,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_cs_t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4163 more)] === [2022-10-15 17:28:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash 383724583, now seen corresponding path program 1 times [2022-10-15 17:28:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:44,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132799576] [2022-10-15 17:28:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:44,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:45,320 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 17:28:45,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:45,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132799576] [2022-10-15 17:28:45,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132799576] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:45,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:45,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:45,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662822999] [2022-10-15 17:28:45,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:45,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:45,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:45,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:45,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:45,326 INFO L87 Difference]: Start difference. First operand 8413 states and 8996 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 17:28:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:51,901 INFO L93 Difference]: Finished difference Result 8367 states and 8950 transitions. [2022-10-15 17:28:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:51,902 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 17:28:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:51,946 INFO L225 Difference]: With dead ends: 8367 [2022-10-15 17:28:51,947 INFO L226 Difference]: Without dead ends: 8367 [2022-10-15 17:28:51,947 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 17:28:51,949 INFO L413 NwaCegarLoop]: 4830 mSDtfsCounter, 8947 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4120 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8947 SdHoareTripleChecker+Valid, 4830 SdHoareTripleChecker+Invalid, 4165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 4120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:51,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8947 Valid, 4830 Invalid, 4165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 4120 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-10-15 17:28:51,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8367 states. [2022-10-15 17:28:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8367 to 8367. [2022-10-15 17:28:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8367 states, 3987 states have (on average 2.091296714321545) internal successors, (8338), 8039 states have internal predecessors, (8338), 306 states have call successors, (306), 44 states have call predecessors, (306), 44 states have return successors, (306), 296 states have call predecessors, (306), 306 states have call successors, (306) [2022-10-15 17:28:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8367 states to 8367 states and 8950 transitions. [2022-10-15 17:28:52,289 INFO L78 Accepts]: Start accepts. Automaton has 8367 states and 8950 transitions. Word has length 4 [2022-10-15 17:28:52,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:52,290 INFO L495 AbstractCegarLoop]: Abstraction has 8367 states and 8950 transitions. [2022-10-15 17:28:52,290 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 17:28:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 8367 states and 8950 transitions. [2022-10-15 17:28:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:28:52,291 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:52,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:28:52,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:28:52,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_cs_t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_cs_t2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4163 more)] === [2022-10-15 17:28:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:52,295 INFO L85 PathProgramCache]: Analyzing trace with hash 383724584, now seen corresponding path program 1 times [2022-10-15 17:28:52,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:52,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078498208] [2022-10-15 17:28:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:52,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:52,747 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 17:28:52,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:52,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078498208] [2022-10-15 17:28:52,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078498208] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:52,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:52,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:52,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878819492] [2022-10-15 17:28:52,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:52,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:52,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:52,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:52,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:52,754 INFO L87 Difference]: Start difference. First operand 8367 states and 8950 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)