/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_nxt.1.M1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:26:21,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:26:21,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:26:21,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:26:21,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:26:21,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:26:21,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:26:21,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:26:21,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:26:21,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:26:21,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:26:21,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:26:21,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:26:21,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:26:21,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:26:21,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:26:21,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:26:21,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:26:21,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:26:21,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:26:21,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:26:21,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:26:21,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:26:21,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:26:21,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:26:21,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:26:21,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:26:21,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:26:21,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:26:21,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:26:21,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:26:21,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:26:21,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:26:21,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:26:21,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:26:21,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:26:21,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:26:21,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:26:21,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:26:21,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:26:21,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:26:21,968 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 17:26:22,029 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:26:22,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:26:22,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:26:22,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:26:22,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:26:22,031 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:26:22,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:26:22,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:26:22,032 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:26:22,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:26:22,033 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:26:22,033 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:26:22,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:26:22,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:26:22,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:26:22,034 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:26:22,034 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:26:22,034 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:26:22,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:26:22,035 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:26:22,035 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:26:22,035 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:26:22,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:26:22,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:26:22,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:26:22,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:26:22,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:26:22,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:26:22,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:26:22,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:26:22,037 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:26:22,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:26:22,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:26:22,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:26:22,532 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:26:22,533 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:26:22,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekcba_nxt.1.M1-1.c [2022-10-15 17:26:22,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76e6a2dbc/c51d33aa064446d2b2b290e1774b0963/FLAGb097a7084 [2022-10-15 17:26:23,441 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:26:23,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekcba_nxt.1.M1-1.c [2022-10-15 17:26:23,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76e6a2dbc/c51d33aa064446d2b2b290e1774b0963/FLAGb097a7084 [2022-10-15 17:26:23,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76e6a2dbc/c51d33aa064446d2b2b290e1774b0963 [2022-10-15 17:26:23,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:26:23,575 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:26:23,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:26:23,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:26:23,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:26:23,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:26:23" (1/1) ... [2022-10-15 17:26:23,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382d1d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:23, skipping insertion in model container [2022-10-15 17:26:23,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:26:23" (1/1) ... [2022-10-15 17:26:23,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:26:23,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:26:23,872 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_nxt.1.M1-1.c[1674,1687] [2022-10-15 17:26:24,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:26:24,361 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:26:24,438 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_nxt.1.M1-1.c[1674,1687] [2022-10-15 17:26:24,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:26:24,695 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:26:24,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24 WrapperNode [2022-10-15 17:26:24,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:26:24,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:26:24,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:26:24,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:26:24,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:24,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:24,993 INFO L138 Inliner]: procedures = 57, calls = 1672, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 3715 [2022-10-15 17:26:24,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:26:24,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:26:24,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:26:24,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:26:25,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:25,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:25,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:25,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:25,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:25,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:25,293 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:25,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:25,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:26:25,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:26:25,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:26:25,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:26:25,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (1/1) ... [2022-10-15 17:26:25,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:26:25,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:26:25,386 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 17:26:25,405 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 17:26:25,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:26:25,459 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-10-15 17:26:25,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-10-15 17:26:25,459 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:26:25,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:26:25,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:26:25,459 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-10-15 17:26:25,460 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-10-15 17:26:25,460 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-10-15 17:26:25,460 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-10-15 17:26:25,460 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-10-15 17:26:25,460 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-10-15 17:26:25,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:26:25,461 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-10-15 17:26:25,461 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-10-15 17:26:25,461 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-10-15 17:26:25,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-10-15 17:26:25,461 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:26:25,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:26:25,461 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:26:25,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:26:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:26:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2022-10-15 17:26:25,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2022-10-15 17:26:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:26:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-10-15 17:26:25,462 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-10-15 17:26:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 17:26:25,463 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 17:26:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:26:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:26:25,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:26:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-10-15 17:26:25,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-10-15 17:26:25,464 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-10-15 17:26:25,464 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-10-15 17:26:25,464 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:26:25,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:26:26,002 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:26:26,014 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:26:31,802 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:26:31,833 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:26:31,833 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-15 17:26:31,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:26:31 BoogieIcfgContainer [2022-10-15 17:26:31,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:26:31,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:26:31,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:26:31,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:26:31,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:26:23" (1/3) ... [2022-10-15 17:26:31,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d130e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:26:31, skipping insertion in model container [2022-10-15 17:26:31,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:24" (2/3) ... [2022-10-15 17:26:31,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d130e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:26:31, skipping insertion in model container [2022-10-15 17:26:31,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:26:31" (3/3) ... [2022-10-15 17:26:31,857 INFO L112 eAbstractionObserver]: Analyzing ICFG rekcba_nxt.1.M1-1.c [2022-10-15 17:26:31,880 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:26:31,881 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2434 error locations. [2022-10-15 17:26:32,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:26:32,041 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;@2bd90ca4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:26:32,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2434 error locations. [2022-10-15 17:26:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 4940 states, 2098 states have (on average 2.2602478551000953) internal successors, (4742), 4563 states have internal predecessors, (4742), 392 states have call successors, (392), 15 states have call predecessors, (392), 15 states have return successors, (392), 390 states have call predecessors, (392), 392 states have call successors, (392) [2022-10-15 17:26:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:26:32,068 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:26:32,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:26:32,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_write_nxtway_gs_modeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_write_nxtway_gs_modeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2432 more)] === [2022-10-15 17:26:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:26:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash 429043, now seen corresponding path program 1 times [2022-10-15 17:26:32,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:26:32,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231670950] [2022-10-15 17:26:32,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:26:32,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:26:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:26:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:26:32,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:26:32,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231670950] [2022-10-15 17:26:32,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231670950] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:26:32,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:26:32,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:26:32,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304677185] [2022-10-15 17:26:32,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:26:32,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:26:32,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:26:32,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:26:32,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:32,595 INFO L87 Difference]: Start difference. First operand has 4940 states, 2098 states have (on average 2.2602478551000953) internal successors, (4742), 4563 states have internal predecessors, (4742), 392 states have call successors, (392), 15 states have call predecessors, (392), 15 states have return successors, (392), 390 states have call predecessors, (392), 392 states have call successors, (392) 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 17:26:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:26:36,979 INFO L93 Difference]: Finished difference Result 5812 states and 6538 transitions. [2022-10-15 17:26:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:26:36,985 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 17:26:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:26:37,043 INFO L225 Difference]: With dead ends: 5812 [2022-10-15 17:26:37,043 INFO L226 Difference]: Without dead ends: 5808 [2022-10-15 17:26:37,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:37,050 INFO L413 NwaCegarLoop]: 3165 mSDtfsCounter, 5350 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5350 SdHoareTripleChecker+Valid, 3916 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:26:37,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5350 Valid, 3916 Invalid, 2922 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 2866 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-10-15 17:26:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2022-10-15 17:26:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5445. [2022-10-15 17:26:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5445 states, 2516 states have (on average 2.1915739268680445) internal successors, (5514), 4978 states have internal predecessors, (5514), 497 states have call successors, (497), 27 states have call predecessors, (497), 26 states have return successors, (497), 467 states have call predecessors, (497), 497 states have call successors, (497) [2022-10-15 17:26:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5445 states to 5445 states and 6508 transitions. [2022-10-15 17:26:37,657 INFO L78 Accepts]: Start accepts. Automaton has 5445 states and 6508 transitions. Word has length 3 [2022-10-15 17:26:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:26:37,658 INFO L495 AbstractCegarLoop]: Abstraction has 5445 states and 6508 transitions. [2022-10-15 17:26:37,660 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 17:26:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 5445 states and 6508 transitions. [2022-10-15 17:26:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:26:37,662 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:26:37,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:26:37,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:26:37,663 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_write_nxtway_gs_modeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_write_nxtway_gs_modeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2432 more)] === [2022-10-15 17:26:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:26:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash 429044, now seen corresponding path program 1 times [2022-10-15 17:26:37,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:26:37,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820534036] [2022-10-15 17:26:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:26:37,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:26:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:26:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:26:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:26:37,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820534036] [2022-10-15 17:26:37,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820534036] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:26:37,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:26:37,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:26:37,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31607635] [2022-10-15 17:26:37,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:26:37,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:26:37,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:26:37,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:26:37,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:37,900 INFO L87 Difference]: Start difference. First operand 5445 states and 6508 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 17:26:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:26:42,324 INFO L93 Difference]: Finished difference Result 5744 states and 6550 transitions. [2022-10-15 17:26:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:26:42,325 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 17:26:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:26:42,356 INFO L225 Difference]: With dead ends: 5744 [2022-10-15 17:26:42,357 INFO L226 Difference]: Without dead ends: 5744 [2022-10-15 17:26:42,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:42,359 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 5094 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 2745 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5094 SdHoareTripleChecker+Valid, 4009 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:26:42,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5094 Valid, 4009 Invalid, 2797 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 2745 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-10-15 17:26:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5744 states. [2022-10-15 17:26:42,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5744 to 5470. [2022-10-15 17:26:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5470 states, 2554 states have (on average 2.1620986687548944) internal successors, (5522), 4989 states have internal predecessors, (5522), 506 states have call successors, (506), 32 states have call predecessors, (506), 31 states have return successors, (506), 476 states have call predecessors, (506), 506 states have call successors, (506) [2022-10-15 17:26:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5470 states to 5470 states and 6534 transitions. [2022-10-15 17:26:42,709 INFO L78 Accepts]: Start accepts. Automaton has 5470 states and 6534 transitions. Word has length 3 [2022-10-15 17:26:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:26:42,709 INFO L495 AbstractCegarLoop]: Abstraction has 5470 states and 6534 transitions. [2022-10-15 17:26:42,710 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 17:26:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5470 states and 6534 transitions. [2022-10-15 17:26:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:26:42,710 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:26:42,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:26:42,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:26:42,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_write_nxtway_gs_modeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_write_nxtway_gs_modeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2432 more)] === [2022-10-15 17:26:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:26:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash 13300711, now seen corresponding path program 1 times [2022-10-15 17:26:42,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:26:42,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366933022] [2022-10-15 17:26:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:26:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:26:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:26:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:26:42,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:26:42,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366933022] [2022-10-15 17:26:42,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366933022] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:26:42,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:26:42,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:26:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692554257] [2022-10-15 17:26:42,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:26:42,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:26:42,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:26:42,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:26:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:42,868 INFO L87 Difference]: Start difference. First operand 5470 states and 6534 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 17:26:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:26:46,895 INFO L93 Difference]: Finished difference Result 5751 states and 6503 transitions. [2022-10-15 17:26:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:26:46,896 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 17:26:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:26:46,923 INFO L225 Difference]: With dead ends: 5751 [2022-10-15 17:26:46,924 INFO L226 Difference]: Without dead ends: 5751 [2022-10-15 17:26:46,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:46,926 INFO L413 NwaCegarLoop]: 3509 mSDtfsCounter, 5238 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5238 SdHoareTripleChecker+Valid, 4257 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:26:46,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5238 Valid, 4257 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-10-15 17:26:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2022-10-15 17:26:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 5448. [2022-10-15 17:26:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 2559 states have (on average 2.1387260648690893) internal successors, (5473), 4966 states have internal predecessors, (5473), 506 states have call successors, (506), 32 states have call predecessors, (506), 31 states have return successors, (506), 477 states have call predecessors, (506), 506 states have call successors, (506) [2022-10-15 17:26:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 6485 transitions. [2022-10-15 17:26:47,236 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 6485 transitions. Word has length 4 [2022-10-15 17:26:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:26:47,236 INFO L495 AbstractCegarLoop]: Abstraction has 5448 states and 6485 transitions. [2022-10-15 17:26:47,237 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 17:26:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 6485 transitions. [2022-10-15 17:26:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:26:47,237 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:26:47,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:26:47,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:26:47,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_write_nxtway_gs_modeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_write_nxtway_gs_modeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2432 more)] === [2022-10-15 17:26:47,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:26:47,239 INFO L85 PathProgramCache]: Analyzing trace with hash 13300712, now seen corresponding path program 1 times [2022-10-15 17:26:47,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:26:47,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14811145] [2022-10-15 17:26:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:26:47,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:26:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:26:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:26:47,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:26:47,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14811145] [2022-10-15 17:26:47,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14811145] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:26:47,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:26:47,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:26:47,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915574388] [2022-10-15 17:26:47,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:26:47,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:26:47,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:26:47,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:26:47,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:47,337 INFO L87 Difference]: Start difference. First operand 5448 states and 6485 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 17:26:52,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:26:52,429 INFO L93 Difference]: Finished difference Result 5635 states and 6439 transitions. [2022-10-15 17:26:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:26:52,430 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 17:26:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:26:52,459 INFO L225 Difference]: With dead ends: 5635 [2022-10-15 17:26:52,459 INFO L226 Difference]: Without dead ends: 5635 [2022-10-15 17:26:52,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:52,461 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 4984 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2693 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4984 SdHoareTripleChecker+Valid, 4007 SdHoareTripleChecker+Invalid, 2746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:26:52,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4984 Valid, 4007 Invalid, 2746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2693 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-10-15 17:26:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2022-10-15 17:26:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 5421. [2022-10-15 17:26:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5421 states, 2559 states have (on average 2.117624071903087) internal successors, (5419), 4939 states have internal predecessors, (5419), 506 states have call successors, (506), 32 states have call predecessors, (506), 31 states have return successors, (506), 477 states have call predecessors, (506), 506 states have call successors, (506) [2022-10-15 17:26:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5421 states to 5421 states and 6431 transitions. [2022-10-15 17:26:52,710 INFO L78 Accepts]: Start accepts. Automaton has 5421 states and 6431 transitions. Word has length 4 [2022-10-15 17:26:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:26:52,710 INFO L495 AbstractCegarLoop]: Abstraction has 5421 states and 6431 transitions. [2022-10-15 17:26:52,711 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 17:26:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5421 states and 6431 transitions. [2022-10-15 17:26:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:26:52,711 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:26:52,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:26:52,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:26:52,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_write_nxtway_gs_modeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_write_nxtway_gs_modeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2432 more)] === [2022-10-15 17:26:52,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:26:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1104869560, now seen corresponding path program 1 times [2022-10-15 17:26:52,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:26:52,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135431669] [2022-10-15 17:26:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:26:52,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:26:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:26:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:26:52,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:26:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135431669] [2022-10-15 17:26:52,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135431669] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:26:52,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:26:52,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:26:52,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42510559] [2022-10-15 17:26:52,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:26:52,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:26:52,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:26:52,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:26:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:52,919 INFO L87 Difference]: Start difference. First operand 5421 states and 6431 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:26:57,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:26:57,482 INFO L93 Difference]: Finished difference Result 5619 states and 6371 transitions. [2022-10-15 17:26:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:26:57,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-10-15 17:26:57,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:26:57,513 INFO L225 Difference]: With dead ends: 5619 [2022-10-15 17:26:57,513 INFO L226 Difference]: Without dead ends: 5619 [2022-10-15 17:26:57,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:57,515 INFO L413 NwaCegarLoop]: 3433 mSDtfsCounter, 5103 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 2726 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5103 SdHoareTripleChecker+Valid, 4210 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-10-15 17:26:57,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5103 Valid, 4210 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2726 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-10-15 17:26:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2022-10-15 17:26:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5343. [2022-10-15 17:26:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5343 states, 2559 states have (on average 2.0871434153966395) internal successors, (5341), 4861 states have internal predecessors, (5341), 506 states have call successors, (506), 32 states have call predecessors, (506), 31 states have return successors, (506), 477 states have call predecessors, (506), 506 states have call successors, (506) [2022-10-15 17:26:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 6353 transitions. [2022-10-15 17:26:57,794 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 6353 transitions. Word has length 7 [2022-10-15 17:26:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:26:57,795 INFO L495 AbstractCegarLoop]: Abstraction has 5343 states and 6353 transitions. [2022-10-15 17:26:57,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:26:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 6353 transitions. [2022-10-15 17:26:57,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:26:57,796 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:26:57,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:26:57,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:26:57,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_write_nxtway_gs_modeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_write_nxtway_gs_modeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2432 more)] === [2022-10-15 17:26:57,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:26:57,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1104869561, now seen corresponding path program 1 times [2022-10-15 17:26:57,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:26:57,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496891915] [2022-10-15 17:26:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:26:57,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:26:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:26:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:26:57,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:26:57,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496891915] [2022-10-15 17:26:57,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496891915] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:26:57,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:26:57,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:26:57,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455069732] [2022-10-15 17:26:57,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:26:57,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:26:57,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:26:57,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:26:57,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:57,938 INFO L87 Difference]: Start difference. First operand 5343 states and 6353 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:27:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:27:04,276 INFO L93 Difference]: Finished difference Result 6170 states and 7391 transitions. [2022-10-15 17:27:04,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:27:04,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-10-15 17:27:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:27:04,310 INFO L225 Difference]: With dead ends: 6170 [2022-10-15 17:27:04,310 INFO L226 Difference]: Without dead ends: 6170 [2022-10-15 17:27:04,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:04,311 INFO L413 NwaCegarLoop]: 3130 mSDtfsCounter, 5158 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5158 SdHoareTripleChecker+Valid, 3910 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:27:04,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5158 Valid, 3910 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-10-15 17:27:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6170 states. [2022-10-15 17:27:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6170 to 5823. [2022-10-15 17:27:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5823 states, 2979 states have (on average 2.032561262168513) internal successors, (6055), 5229 states have internal predecessors, (6055), 632 states have call successors, (632), 44 states have call predecessors, (632), 43 states have return successors, (679), 601 states have call predecessors, (679), 632 states have call successors, (679) [2022-10-15 17:27:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5823 states to 5823 states and 7366 transitions. [2022-10-15 17:27:04,614 INFO L78 Accepts]: Start accepts. Automaton has 5823 states and 7366 transitions. Word has length 7 [2022-10-15 17:27:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:27:04,615 INFO L495 AbstractCegarLoop]: Abstraction has 5823 states and 7366 transitions. [2022-10-15 17:27:04,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:27:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5823 states and 7366 transitions. [2022-10-15 17:27:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 17:27:04,616 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:04,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:27:04,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-15 17:27:04,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_write_nxtway_gs_modeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_write_nxtway_gs_modeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2432 more)] === [2022-10-15 17:27:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:04,617 INFO L85 PathProgramCache]: Analyzing trace with hash 922737465, now seen corresponding path program 1 times [2022-10-15 17:27:04,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:04,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272684830] [2022-10-15 17:27:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:04,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:27:04,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:04,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272684830] [2022-10-15 17:27:04,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272684830] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:04,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:04,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:04,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143059635] [2022-10-15 17:27:04,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:04,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:04,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:04,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:04,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:04,735 INFO L87 Difference]: Start difference. First operand 5823 states and 7366 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:27:09,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:27:09,622 INFO L93 Difference]: Finished difference Result 6049 states and 7336 transitions. [2022-10-15 17:27:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:27:09,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-10-15 17:27:09,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:27:09,641 INFO L225 Difference]: With dead ends: 6049 [2022-10-15 17:27:09,641 INFO L226 Difference]: Without dead ends: 6049 [2022-10-15 17:27:09,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:09,642 INFO L413 NwaCegarLoop]: 3377 mSDtfsCounter, 4967 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 2648 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4967 SdHoareTripleChecker+Valid, 4154 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:27:09,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4967 Valid, 4154 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2648 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-10-15 17:27:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6049 states. [2022-10-15 17:27:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6049 to 5767. [2022-10-15 17:27:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 2979 states have (on average 2.0137630077207116) internal successors, (5999), 5173 states have internal predecessors, (5999), 632 states have call successors, (632), 44 states have call predecessors, (632), 43 states have return successors, (679), 601 states have call predecessors, (679), 632 states have call successors, (679) [2022-10-15 17:27:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 7310 transitions. [2022-10-15 17:27:09,960 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 7310 transitions. Word has length 9 [2022-10-15 17:27:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:27:09,960 INFO L495 AbstractCegarLoop]: Abstraction has 5767 states and 7310 transitions. [2022-10-15 17:27:09,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:27:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 7310 transitions. [2022-10-15 17:27:09,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 17:27:09,962 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:09,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:27:09,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-15 17:27:09,962 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_write_nxtway_gs_modeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_write_nxtway_gs_modeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2432 more)] === [2022-10-15 17:27:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:09,963 INFO L85 PathProgramCache]: Analyzing trace with hash 922737466, now seen corresponding path program 1 times [2022-10-15 17:27:09,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:09,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087871938] [2022-10-15 17:27:09,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:09,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:27:10,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:10,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087871938] [2022-10-15 17:27:10,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087871938] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:10,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:10,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:10,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580856577] [2022-10-15 17:27:10,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:10,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:10,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:10,116 INFO L87 Difference]: Start difference. First operand 5767 states and 7310 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:27:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:27:17,146 INFO L93 Difference]: Finished difference Result 6052 states and 7271 transitions. [2022-10-15 17:27:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:27:17,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-10-15 17:27:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:27:17,168 INFO L225 Difference]: With dead ends: 6052 [2022-10-15 17:27:17,172 INFO L226 Difference]: Without dead ends: 6052 [2022-10-15 17:27:17,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:17,174 INFO L413 NwaCegarLoop]: 3074 mSDtfsCounter, 5044 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5044 SdHoareTripleChecker+Valid, 3854 SdHoareTripleChecker+Invalid, 2654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:27:17,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5044 Valid, 3854 Invalid, 2654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-10-15 17:27:17,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2022-10-15 17:27:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 5711. [2022-10-15 17:27:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 2979 states have (on average 1.9949647532729105) internal successors, (5943), 5117 states have internal predecessors, (5943), 632 states have call successors, (632), 44 states have call predecessors, (632), 43 states have return successors, (679), 601 states have call predecessors, (679), 632 states have call successors, (679) [2022-10-15 17:27:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 7254 transitions. [2022-10-15 17:27:17,492 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 7254 transitions. Word has length 9 [2022-10-15 17:27:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:27:17,492 INFO L495 AbstractCegarLoop]: Abstraction has 5711 states and 7254 transitions. [2022-10-15 17:27:17,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:27:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 7254 transitions. [2022-10-15 17:27:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-15 17:27:17,495 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:17,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:27:17,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-15 17:27:17,495 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [__startrek_write_nxtway_gs_modeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, __startrek_write_nxtway_gs_modeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2432 more)] === [2022-10-15 17:27:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:17,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2068905108, now seen corresponding path program 1 times [2022-10-15 17:27:17,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:17,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794923833] [2022-10-15 17:27:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:17,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:17,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-15 17:27:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:17,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-15 17:27:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:17,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-15 17:27:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-15 17:27:17,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:17,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794923833] [2022-10-15 17:27:17,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794923833] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:17,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:17,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:27:17,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083826688] [2022-10-15 17:27:17,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:17,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:17,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:17,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:17,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:17,696 INFO L87 Difference]: Start difference. First operand 5711 states and 7254 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)