/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.M1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:26:28,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:26:28,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:26:28,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:26:28,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:26:28,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:26:28,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:26:28,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:26:28,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:26:28,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:26:28,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:26:28,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:26:28,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:26:28,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:26:28,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:26:28,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:26:28,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:26:28,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:26:28,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:26:28,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:26:28,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:26:28,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:26:28,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:26:28,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:26:28,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:26:28,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:26:28,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:26:28,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:26:28,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:26:28,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:26:28,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:26:28,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:26:28,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:26:28,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:26:28,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:26:28,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:26:28,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:26:28,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:26:28,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:26:28,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:26:28,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:26:28,665 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 17:26:28,700 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:26:28,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:26:28,701 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:26:28,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:26:28,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:26:28,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:26:28,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:26:28,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:26:28,704 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:26:28,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:26:28,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:26:28,705 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:26:28,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:26:28,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:26:28,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:26:28,706 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:26:28,707 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:26:28,707 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:26:28,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:26:28,708 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:26:28,708 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:26:28,708 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:26:28,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:26:28,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:26:28,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:26:28,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:26:28,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:26:28,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:26:28,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:26:28,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:26:28,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:26:29,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:26:29,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:26:29,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:26:29,188 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:26:29,189 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:26:29,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekcba_nxt.1.M1-2.c [2022-10-15 17:26:29,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a64b44db/72256860053a4bcbb307e09fde1b4063/FLAGac95653db [2022-10-15 17:26:30,374 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:26:30,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekcba_nxt.1.M1-2.c [2022-10-15 17:26:30,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a64b44db/72256860053a4bcbb307e09fde1b4063/FLAGac95653db [2022-10-15 17:26:30,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a64b44db/72256860053a4bcbb307e09fde1b4063 [2022-10-15 17:26:30,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:26:30,489 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:26:30,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:26:30,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:26:30,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:26:30,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:26:30" (1/1) ... [2022-10-15 17:26:30,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68cab160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:30, skipping insertion in model container [2022-10-15 17:26:30,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:26:30" (1/1) ... [2022-10-15 17:26:30,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:26:30,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:26:30,997 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.M1-2.c[1673,1686] [2022-10-15 17:26:31,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:26:31,767 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:26:31,807 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.M1-2.c[1673,1686] [2022-10-15 17:26:32,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:26:32,114 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:26:32,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32 WrapperNode [2022-10-15 17:26:32,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:26:32,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:26:32,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:26:32,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:26:32,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,386 INFO L138 Inliner]: procedures = 57, calls = 1672, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 3715 [2022-10-15 17:26:32,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:26:32,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:26:32,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:26:32,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:26:32,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,637 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:26:32,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:26:32,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:26:32,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:26:32,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (1/1) ... [2022-10-15 17:26:32,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:26:32,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:26:32,755 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 17:26:32,759 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 17:26:32,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:26:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-10-15 17:26:32,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-10-15 17:26:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:26:32,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:26:32,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:26:32,853 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-10-15 17:26:32,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-10-15 17:26:32,853 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-10-15 17:26:32,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-10-15 17:26:32,854 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-10-15 17:26:32,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-10-15 17:26:32,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:26:32,855 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-10-15 17:26:32,855 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-10-15 17:26:32,855 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-10-15 17:26:32,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-10-15 17:26:32,856 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:26:32,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:26:32,856 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:26:32,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:26:32,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:26:32,857 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2022-10-15 17:26:32,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2022-10-15 17:26:32,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:26:32,857 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-10-15 17:26:32,857 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-10-15 17:26:32,858 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 17:26:32,858 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 17:26:32,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:26:32,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:26:32,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:26:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-10-15 17:26:32,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-10-15 17:26:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-10-15 17:26:32,860 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-10-15 17:26:32,860 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:26:32,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:26:33,522 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:26:33,526 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:26:40,966 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:26:41,003 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:26:41,003 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-15 17:26:41,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:26:41 BoogieIcfgContainer [2022-10-15 17:26:41,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:26:41,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:26:41,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:26:41,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:26:41,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:26:30" (1/3) ... [2022-10-15 17:26:41,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42846c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:26:41, skipping insertion in model container [2022-10-15 17:26:41,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:26:32" (2/3) ... [2022-10-15 17:26:41,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42846c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:26:41, skipping insertion in model container [2022-10-15 17:26:41,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:26:41" (3/3) ... [2022-10-15 17:26:41,032 INFO L112 eAbstractionObserver]: Analyzing ICFG rekcba_nxt.1.M1-2.c [2022-10-15 17:26:41,061 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:26:41,062 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2434 error locations. [2022-10-15 17:26:41,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:26:41,245 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;@585a2de9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:26:41,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2434 error locations. [2022-10-15 17:26:41,271 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 17:26:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:26:41,283 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:26:41,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:26:41,285 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 17:26:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:26:41,294 INFO L85 PathProgramCache]: Analyzing trace with hash 429043, now seen corresponding path program 1 times [2022-10-15 17:26:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:26:41,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902673309] [2022-10-15 17:26:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:26:41,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:26:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:26:41,981 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 17:26:41,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:26:41,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902673309] [2022-10-15 17:26:41,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902673309] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:26:41,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:26:41,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:26:41,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757525594] [2022-10-15 17:26:41,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:26:42,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:26:42,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:26:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:26:42,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:42,154 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 17:26:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:26:47,933 INFO L93 Difference]: Finished difference Result 5812 states and 6538 transitions. [2022-10-15 17:26:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:26:47,937 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 17:26:47,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:26:48,007 INFO L225 Difference]: With dead ends: 5812 [2022-10-15 17:26:48,007 INFO L226 Difference]: Without dead ends: 5808 [2022-10-15 17:26:48,010 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 17:26:48,016 INFO L413 NwaCegarLoop]: 3165 mSDtfsCounter, 5350 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s 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, 5.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:26:48,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5350 Valid, 3916 Invalid, 2922 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 2866 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-10-15 17:26:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2022-10-15 17:26:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5445. [2022-10-15 17:26:48,526 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 17:26:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5445 states to 5445 states and 6508 transitions. [2022-10-15 17:26:48,589 INFO L78 Accepts]: Start accepts. Automaton has 5445 states and 6508 transitions. Word has length 3 [2022-10-15 17:26:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:26:48,590 INFO L495 AbstractCegarLoop]: Abstraction has 5445 states and 6508 transitions. [2022-10-15 17:26:48,590 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 17:26:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5445 states and 6508 transitions. [2022-10-15 17:26:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:26:48,591 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:26:48,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:26:48,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:26:48,592 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 17:26:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:26:48,593 INFO L85 PathProgramCache]: Analyzing trace with hash 429044, now seen corresponding path program 1 times [2022-10-15 17:26:48,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:26:48,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905745441] [2022-10-15 17:26:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:26:48,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:26:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:26:48,832 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 17:26:48,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:26:48,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905745441] [2022-10-15 17:26:48,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905745441] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:26:48,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:26:48,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:26:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282380826] [2022-10-15 17:26:48,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:26:48,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:26:48,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:26:48,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:26:48,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:48,839 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 17:26:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:26:55,840 INFO L93 Difference]: Finished difference Result 5744 states and 6550 transitions. [2022-10-15 17:26:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:26:55,854 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 17:26:55,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:26:55,902 INFO L225 Difference]: With dead ends: 5744 [2022-10-15 17:26:55,902 INFO L226 Difference]: Without dead ends: 5744 [2022-10-15 17:26:55,903 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 17:26:55,905 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 5094 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 2745 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s 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, 6.5s IncrementalHoareTripleChecker+Time [2022-10-15 17:26:55,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5094 Valid, 4009 Invalid, 2797 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 2745 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-10-15 17:26:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5744 states. [2022-10-15 17:26:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5744 to 5470. [2022-10-15 17:26:56,447 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 17:26:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5470 states to 5470 states and 6534 transitions. [2022-10-15 17:26:56,484 INFO L78 Accepts]: Start accepts. Automaton has 5470 states and 6534 transitions. Word has length 3 [2022-10-15 17:26:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:26:56,485 INFO L495 AbstractCegarLoop]: Abstraction has 5470 states and 6534 transitions. [2022-10-15 17:26:56,485 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 17:26:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5470 states and 6534 transitions. [2022-10-15 17:26:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:26:56,486 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:26:56,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:26:56,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:26:56,487 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 17:26:56,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:26:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash 13300711, now seen corresponding path program 1 times [2022-10-15 17:26:56,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:26:56,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019843062] [2022-10-15 17:26:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:26:56,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:26:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:26:56,597 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 17:26:56,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:26:56,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019843062] [2022-10-15 17:26:56,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019843062] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:26:56,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:26:56,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:26:56,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064470116] [2022-10-15 17:26:56,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:26:56,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:26:56,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:26:56,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:26:56,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:26:56,602 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 17:27:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:27:01,924 INFO L93 Difference]: Finished difference Result 5751 states and 6503 transitions. [2022-10-15 17:27:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:27:01,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:27:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:27:01,956 INFO L225 Difference]: With dead ends: 5751 [2022-10-15 17:27:01,956 INFO L226 Difference]: Without dead ends: 5751 [2022-10-15 17:27:01,957 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 17:27:01,958 INFO L413 NwaCegarLoop]: 3509 mSDtfsCounter, 5238 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5238 SdHoareTripleChecker+Valid, 4257 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:27:01,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5238 Valid, 4257 Invalid, 2868 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-10-15 17:27:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2022-10-15 17:27:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 5448. [2022-10-15 17:27:02,282 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 17:27:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 6485 transitions. [2022-10-15 17:27:02,305 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 6485 transitions. Word has length 4 [2022-10-15 17:27:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:27:02,306 INFO L495 AbstractCegarLoop]: Abstraction has 5448 states and 6485 transitions. [2022-10-15 17:27:02,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:27:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 6485 transitions. [2022-10-15 17:27:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:27:02,307 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:02,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:27:02,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:27:02,308 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 17:27:02,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:02,309 INFO L85 PathProgramCache]: Analyzing trace with hash 13300712, now seen corresponding path program 1 times [2022-10-15 17:27:02,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:02,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310447893] [2022-10-15 17:27:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:02,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:02,420 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 17:27:02,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:02,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310447893] [2022-10-15 17:27:02,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310447893] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:02,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:02,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:02,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739002446] [2022-10-15 17:27:02,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:02,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:02,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:02,424 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 17:27:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:27:09,104 INFO L93 Difference]: Finished difference Result 5635 states and 6439 transitions. [2022-10-15 17:27:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:27:09,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:27:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:27:09,137 INFO L225 Difference]: With dead ends: 5635 [2022-10-15 17:27:09,138 INFO L226 Difference]: Without dead ends: 5635 [2022-10-15 17:27:09,138 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 17:27:09,140 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 4984 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2693 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4984 SdHoareTripleChecker+Valid, 4007 SdHoareTripleChecker+Invalid, 2746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-10-15 17:27:09,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4984 Valid, 4007 Invalid, 2746 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [53 Valid, 2693 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-10-15 17:27:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2022-10-15 17:27:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 5421. [2022-10-15 17:27:09,446 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 17:27:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5421 states to 5421 states and 6431 transitions. [2022-10-15 17:27:09,468 INFO L78 Accepts]: Start accepts. Automaton has 5421 states and 6431 transitions. Word has length 4 [2022-10-15 17:27:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:27:09,469 INFO L495 AbstractCegarLoop]: Abstraction has 5421 states and 6431 transitions. [2022-10-15 17:27:09,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:27:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5421 states and 6431 transitions. [2022-10-15 17:27:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:27:09,470 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:09,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:27:09,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:27:09,471 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 17:27:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:09,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1104869560, now seen corresponding path program 1 times [2022-10-15 17:27:09,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:09,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338338748] [2022-10-15 17:27:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:09,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:09,588 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 17:27:09,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:09,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338338748] [2022-10-15 17:27:09,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338338748] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:09,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:09,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:09,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507160798] [2022-10-15 17:27:09,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:09,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:09,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:09,604 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 17:27:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:27:15,226 INFO L93 Difference]: Finished difference Result 5619 states and 6371 transitions. [2022-10-15 17:27:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:27:15,227 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 17:27:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:27:15,268 INFO L225 Difference]: With dead ends: 5619 [2022-10-15 17:27:15,268 INFO L226 Difference]: Without dead ends: 5619 [2022-10-15 17:27:15,269 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 17:27:15,270 INFO L413 NwaCegarLoop]: 3433 mSDtfsCounter, 5103 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 2726 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s 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, 5.4s IncrementalHoareTripleChecker+Time [2022-10-15 17:27:15,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5103 Valid, 4210 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2726 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-10-15 17:27:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2022-10-15 17:27:15,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5343. [2022-10-15 17:27:15,632 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 17:27:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 6353 transitions. [2022-10-15 17:27:15,653 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 6353 transitions. Word has length 7 [2022-10-15 17:27:15,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:27:15,654 INFO L495 AbstractCegarLoop]: Abstraction has 5343 states and 6353 transitions. [2022-10-15 17:27:15,655 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 17:27:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 6353 transitions. [2022-10-15 17:27:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:27:15,656 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:27:15,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:27:15,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:27:15,656 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 17:27:15,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:27:15,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1104869561, now seen corresponding path program 1 times [2022-10-15 17:27:15,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:27:15,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248036072] [2022-10-15 17:27:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:27:15,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:27:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:27:15,797 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 17:27:15,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:27:15,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248036072] [2022-10-15 17:27:15,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248036072] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:27:15,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:27:15,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:27:15,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479522562] [2022-10-15 17:27:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:27:15,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:27:15,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:27:15,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:27:15,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:27:15,800 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)