/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:28:27,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:28:27,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:28:27,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:28:27,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:28:27,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:28:27,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:28:27,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:28:27,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:28:27,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:28:27,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:28:27,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:28:27,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:28:27,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:28:27,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:28:27,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:28:27,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:28:27,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:28:27,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:28:27,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:28:27,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:28:27,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:28:27,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:28:27,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:28:27,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:28:27,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:28:27,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:28:27,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:28:27,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:28:27,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:28:27,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:28:27,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:28:27,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:28:27,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:28:27,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:28:27,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:28:27,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:28:27,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:28:27,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:28:27,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:28:27,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:28:27,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:28:27,411 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:28:27,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:28:27,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:28:27,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:28:27,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:28:27,416 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:28:27,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:28:27,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:28:27,419 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:28:27,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:28:27,421 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:28:27,422 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:28:27,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:28:27,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:28:27,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:28:27,423 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:28:27,423 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:28:27,423 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:28:27,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:28:27,424 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:28:27,424 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:28:27,425 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:28:27,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:28:27,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:28:27,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:28:27,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:28:27,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:28:27,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:28:27,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:28:27,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:28:27,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:28:27,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:28:27,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:28:27,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:28:27,996 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:28:27,997 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:28:27,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c [2022-10-15 17:28:28,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/179ce14b1/83fb546fdfc746759bcfdc72b6c924af/FLAG084c9b825 [2022-10-15 17:28:29,082 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:28:29,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c [2022-10-15 17:28:29,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/179ce14b1/83fb546fdfc746759bcfdc72b6c924af/FLAG084c9b825 [2022-10-15 17:28:29,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/179ce14b1/83fb546fdfc746759bcfdc72b6c924af [2022-10-15 17:28:29,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:28:29,202 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:28:29,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:28:29,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:28:29,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:28:29,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:28:29" (1/1) ... [2022-10-15 17:28:29,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cda1c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:29, skipping insertion in model container [2022-10-15 17:28:29,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:28:29" (1/1) ... [2022-10-15 17:28:29,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:28:29,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:28:29,513 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c[1682,1695] [2022-10-15 17:28:30,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:28:30,061 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:28:30,094 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/rekh_nxt.2.M1-2.c[1682,1695] [2022-10-15 17:28:30,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:28:30,393 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:28:30,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30 WrapperNode [2022-10-15 17:28:30,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:28:30,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:28:30,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:28:30,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:28:30,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:30,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:30,730 INFO L138 Inliner]: procedures = 56, calls = 2059, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 4010 [2022-10-15 17:28:30,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:28:30,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:28:30,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:28:30,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:28:30,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:30,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:30,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:30,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:30,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:31,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:31,083 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:31,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:31,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:28:31,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:28:31,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:28:31,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:28:31,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (1/1) ... [2022-10-15 17:28:31,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:28:31,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:28:31,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-15 17:28:31,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-15 17:28:31,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:28:31,283 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2022-10-15 17:28:31,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2022-10-15 17:28:31,284 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:28:31,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_nxtway_gs_mode [2022-10-15 17:28:31,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:28:31,284 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2022-10-15 17:28:31,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2022-10-15 17:28:31,285 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2022-10-15 17:28:31,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2022-10-15 17:28:31,285 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_obstacle_flag [2022-10-15 17:28:31,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_obstacle_flag [2022-10-15 17:28:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:28:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2022-10-15 17:28:31,286 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2022-10-15 17:28:31,286 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_gyro_sensor [2022-10-15 17:28:31,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_gyro_sensor [2022-10-15 17:28:31,287 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:28:31,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts1 [2022-10-15 17:28:31,287 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:28:31,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_ts2 [2022-10-15 17:28:31,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:28:31,287 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_OSEK_Task_Background [2022-10-15 17:28:31,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_OSEK_Task_Background [2022-10-15 17:28:31,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:28:31,288 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-10-15 17:28:31,288 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-10-15 17:28:31,288 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_speed [2022-10-15 17:28:31,288 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_speed [2022-10-15 17:28:31,289 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 17:28:31,289 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 17:28:31,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:28:31,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:28:31,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:28:31,290 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_get_systick_ms [2022-10-15 17:28:31,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_get_systick_ms [2022-10-15 17:28:31,290 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2022-10-15 17:28:31,290 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2022-10-15 17:28:31,290 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:28:31,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtway_gs_mode [2022-10-15 17:28:31,886 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:28:31,891 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:28:39,075 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:28:39,123 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:28:39,123 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-15 17:28:39,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:28:39 BoogieIcfgContainer [2022-10-15 17:28:39,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:28:39,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:28:39,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:28:39,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:28:39,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:28:29" (1/3) ... [2022-10-15 17:28:39,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba9e1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:28:39, skipping insertion in model container [2022-10-15 17:28:39,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:28:30" (2/3) ... [2022-10-15 17:28:39,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba9e1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:28:39, skipping insertion in model container [2022-10-15 17:28:39,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:28:39" (3/3) ... [2022-10-15 17:28:39,151 INFO L112 eAbstractionObserver]: Analyzing ICFG rekh_nxt.2.M1-2.c [2022-10-15 17:28:39,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:28:39,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2736 error locations. [2022-10-15 17:28:39,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:28:39,347 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;@5cb3a8c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:28:39,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2736 error locations. [2022-10-15 17:28:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 5957 states, 2566 states have (on average 2.1539360872954014) internal successors, (5527), 5306 states have internal predecessors, (5527), 638 states have call successors, (638), 16 states have call predecessors, (638), 16 states have return successors, (638), 636 states have call predecessors, (638), 638 states have call successors, (638) [2022-10-15 17:28:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:28:39,386 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:39,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:28:39,388 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 2734 more)] === [2022-10-15 17:28:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:39,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1138045, now seen corresponding path program 1 times [2022-10-15 17:28:39,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:39,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042958844] [2022-10-15 17:28:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:39,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:28:39,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:39,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042958844] [2022-10-15 17:28:39,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042958844] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:39,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:39,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820287261] [2022-10-15 17:28:39,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:39,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:39,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:40,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:40,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:40,084 INFO L87 Difference]: Start difference. First operand has 5957 states, 2566 states have (on average 2.1539360872954014) internal successors, (5527), 5306 states have internal predecessors, (5527), 638 states have call successors, (638), 16 states have call predecessors, (638), 16 states have return successors, (638), 636 states have call predecessors, (638), 638 states have call successors, (638) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:45,377 INFO L93 Difference]: Finished difference Result 6610 states and 7599 transitions. [2022-10-15 17:28:45,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-15 17:28:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:45,487 INFO L225 Difference]: With dead ends: 6610 [2022-10-15 17:28:45,490 INFO L226 Difference]: Without dead ends: 6608 [2022-10-15 17:28:45,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:45,506 INFO L413 NwaCegarLoop]: 5214 mSDtfsCounter, 3766 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 3132 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3766 SdHoareTripleChecker+Valid, 7546 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:45,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3766 Valid, 7546 Invalid, 3161 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 3132 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-10-15 17:28:45,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2022-10-15 17:28:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 6343. [2022-10-15 17:28:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 2891 states have (on average 2.12902109996541) internal successors, (6155), 5606 states have internal predecessors, (6155), 716 states have call successors, (716), 28 states have call predecessors, (716), 27 states have return successors, (716), 710 states have call predecessors, (716), 716 states have call successors, (716) [2022-10-15 17:28:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 7587 transitions. [2022-10-15 17:28:46,585 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 7587 transitions. Word has length 3 [2022-10-15 17:28:46,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:46,586 INFO L495 AbstractCegarLoop]: Abstraction has 6343 states and 7587 transitions. [2022-10-15 17:28:46,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 7587 transitions. [2022-10-15 17:28:46,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-15 17:28:46,587 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:46,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-15 17:28:46,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:28:46,588 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 2734 more)] === [2022-10-15 17:28:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:46,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1138046, now seen corresponding path program 1 times [2022-10-15 17:28:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:46,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806470479] [2022-10-15 17:28:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:46,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:28:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:46,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806470479] [2022-10-15 17:28:46,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806470479] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:46,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:46,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:46,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993907390] [2022-10-15 17:28:46,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:46,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:46,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:46,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:46,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:46,863 INFO L87 Difference]: Start difference. First operand 6343 states and 7587 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:51,804 INFO L93 Difference]: Finished difference Result 6320 states and 7563 transitions. [2022-10-15 17:28:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-15 17:28:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:51,854 INFO L225 Difference]: With dead ends: 6320 [2022-10-15 17:28:51,855 INFO L226 Difference]: Without dead ends: 6320 [2022-10-15 17:28:51,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:51,857 INFO L413 NwaCegarLoop]: 5398 mSDtfsCounter, 2920 mSDsluCounter, 2334 mSDsCounter, 0 mSdLazyCounter, 2837 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2920 SdHoareTripleChecker+Valid, 7732 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:51,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2920 Valid, 7732 Invalid, 2863 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 2837 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-10-15 17:28:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6320 states. [2022-10-15 17:28:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6320 to 6320. [2022-10-15 17:28:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6320 states, 2894 states have (on average 2.1185210780926056) internal successors, (6131), 5582 states have internal predecessors, (6131), 716 states have call successors, (716), 29 states have call predecessors, (716), 28 states have return successors, (716), 710 states have call predecessors, (716), 716 states have call successors, (716) [2022-10-15 17:28:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6320 states to 6320 states and 7563 transitions. [2022-10-15 17:28:52,454 INFO L78 Accepts]: Start accepts. Automaton has 6320 states and 7563 transitions. Word has length 3 [2022-10-15 17:28:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:52,454 INFO L495 AbstractCegarLoop]: Abstraction has 6320 states and 7563 transitions. [2022-10-15 17:28:52,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 6320 states and 7563 transitions. [2022-10-15 17:28:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:28:52,455 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:52,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:28:52,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:28:52,456 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 2734 more)] === [2022-10-15 17:28:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:52,457 INFO L85 PathProgramCache]: Analyzing trace with hash 35280487, now seen corresponding path program 1 times [2022-10-15 17:28:52,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:52,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580323838] [2022-10-15 17:28:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:52,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:28:52,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:52,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580323838] [2022-10-15 17:28:52,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580323838] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:52,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:52,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:52,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783084645] [2022-10-15 17:28:52,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:52,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:52,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:52,560 INFO L87 Difference]: Start difference. First operand 6320 states and 7563 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:28:57,112 INFO L93 Difference]: Finished difference Result 6556 states and 7544 transitions. [2022-10-15 17:28:57,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:28:57,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:28:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:28:57,155 INFO L225 Difference]: With dead ends: 6556 [2022-10-15 17:28:57,156 INFO L226 Difference]: Without dead ends: 6556 [2022-10-15 17:28:57,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:57,162 INFO L413 NwaCegarLoop]: 5186 mSDtfsCounter, 3709 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 3103 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3709 SdHoareTripleChecker+Valid, 7517 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:28:57,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3709 Valid, 7517 Invalid, 3133 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 3103 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-10-15 17:28:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-10-15 17:28:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6293. [2022-10-15 17:28:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6293 states, 2894 states have (on average 2.1085003455425015) internal successors, (6102), 5555 states have internal predecessors, (6102), 716 states have call successors, (716), 29 states have call predecessors, (716), 28 states have return successors, (716), 710 states have call predecessors, (716), 716 states have call successors, (716) [2022-10-15 17:28:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6293 states to 6293 states and 7534 transitions. [2022-10-15 17:28:57,692 INFO L78 Accepts]: Start accepts. Automaton has 6293 states and 7534 transitions. Word has length 4 [2022-10-15 17:28:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:28:57,693 INFO L495 AbstractCegarLoop]: Abstraction has 6293 states and 7534 transitions. [2022-10-15 17:28:57,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:28:57,694 INFO L276 IsEmpty]: Start isEmpty. Operand 6293 states and 7534 transitions. [2022-10-15 17:28:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:28:57,695 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:28:57,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:28:57,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:28:57,696 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 2734 more)] === [2022-10-15 17:28:57,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:28:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash 35280488, now seen corresponding path program 1 times [2022-10-15 17:28:57,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:28:57,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620438665] [2022-10-15 17:28:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:28:57,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:28:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:28:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:28:57,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:28:57,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620438665] [2022-10-15 17:28:57,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620438665] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:28:57,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:28:57,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:28:57,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625195684] [2022-10-15 17:28:57,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:28:57,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:28:57,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:28:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:28:57,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:28:57,882 INFO L87 Difference]: Start difference. First operand 6293 states and 7534 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 17:29:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:29:03,555 INFO L93 Difference]: Finished difference Result 6266 states and 7507 transitions. [2022-10-15 17:29:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:29:03,556 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 17:29:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:29:03,590 INFO L225 Difference]: With dead ends: 6266 [2022-10-15 17:29:03,590 INFO L226 Difference]: Without dead ends: 6266 [2022-10-15 17:29:03,591 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 17:29:03,592 INFO L413 NwaCegarLoop]: 5371 mSDtfsCounter, 2865 mSDsluCounter, 2334 mSDsCounter, 0 mSdLazyCounter, 2810 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2865 SdHoareTripleChecker+Valid, 7705 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-10-15 17:29:03,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2865 Valid, 7705 Invalid, 2836 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 2810 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-10-15 17:29:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6266 states. [2022-10-15 17:29:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6266 to 6266. [2022-10-15 17:29:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6266 states, 2894 states have (on average 2.0991706979958535) internal successors, (6075), 5528 states have internal predecessors, (6075), 716 states have call successors, (716), 29 states have call predecessors, (716), 28 states have return successors, (716), 710 states have call predecessors, (716), 716 states have call successors, (716) [2022-10-15 17:29:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6266 states to 6266 states and 7507 transitions. [2022-10-15 17:29:04,004 INFO L78 Accepts]: Start accepts. Automaton has 6266 states and 7507 transitions. Word has length 4 [2022-10-15 17:29:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:29:04,005 INFO L495 AbstractCegarLoop]: Abstraction has 6266 states and 7507 transitions. [2022-10-15 17:29:04,005 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 17:29:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 6266 states and 7507 transitions. [2022-10-15 17:29:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:29:04,006 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:29:04,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:29:04,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:29:04,007 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 2734 more)] === [2022-10-15 17:29:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:29:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1224910910, now seen corresponding path program 1 times [2022-10-15 17:29:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:29:04,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667738050] [2022-10-15 17:29:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:29:04,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:29:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:29:04,143 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 17:29:04,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:29:04,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667738050] [2022-10-15 17:29:04,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667738050] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:29:04,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:29:04,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:29:04,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315663314] [2022-10-15 17:29:04,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:29:04,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:29:04,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:29:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:29:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:29:04,159 INFO L87 Difference]: Start difference. First operand 6266 states and 7507 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 17:29:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:29:09,402 INFO L93 Difference]: Finished difference Result 6305 states and 7293 transitions. [2022-10-15 17:29:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:29:09,403 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 17:29:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:29:09,443 INFO L225 Difference]: With dead ends: 6305 [2022-10-15 17:29:09,443 INFO L226 Difference]: Without dead ends: 6305 [2022-10-15 17:29:09,444 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 17:29:09,445 INFO L413 NwaCegarLoop]: 5014 mSDtfsCounter, 3455 mSDsluCounter, 2381 mSDsCounter, 0 mSdLazyCounter, 3024 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 7395 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 3024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:29:09,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 7395 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 3024 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-10-15 17:29:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2022-10-15 17:29:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 6092. [2022-10-15 17:29:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6092 states, 2894 states have (on average 2.021769177608846) internal successors, (5851), 5354 states have internal predecessors, (5851), 716 states have call successors, (716), 29 states have call predecessors, (716), 28 states have return successors, (716), 710 states have call predecessors, (716), 716 states have call successors, (716) [2022-10-15 17:29:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6092 states to 6092 states and 7283 transitions. [2022-10-15 17:29:09,868 INFO L78 Accepts]: Start accepts. Automaton has 6092 states and 7283 transitions. Word has length 7 [2022-10-15 17:29:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:29:09,872 INFO L495 AbstractCegarLoop]: Abstraction has 6092 states and 7283 transitions. [2022-10-15 17:29:09,873 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 17:29:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6092 states and 7283 transitions. [2022-10-15 17:29:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:29:09,874 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:29:09,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:29:09,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:29:09,875 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 2734 more)] === [2022-10-15 17:29:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:29:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1224910909, now seen corresponding path program 1 times [2022-10-15 17:29:09,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:29:09,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252402862] [2022-10-15 17:29:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:29:09,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:29:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:29:10,070 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 17:29:10,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:29:10,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252402862] [2022-10-15 17:29:10,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252402862] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:29:10,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:29:10,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:29:10,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957655830] [2022-10-15 17:29:10,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:29:10,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:29:10,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:29:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:29:10,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:29:10,074 INFO L87 Difference]: Start difference. First operand 6092 states and 7283 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 17:29:16,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:29:16,778 INFO L93 Difference]: Finished difference Result 5918 states and 7109 transitions. [2022-10-15 17:29:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:29:16,784 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 17:29:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:29:16,804 INFO L225 Difference]: With dead ends: 5918 [2022-10-15 17:29:16,805 INFO L226 Difference]: Without dead ends: 5918 [2022-10-15 17:29:16,805 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 17:29:16,806 INFO L413 NwaCegarLoop]: 5197 mSDtfsCounter, 2514 mSDsluCounter, 2384 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2514 SdHoareTripleChecker+Valid, 7581 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-10-15 17:29:16,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2514 Valid, 7581 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2586 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-10-15 17:29:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5918 states. [2022-10-15 17:29:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5918 to 5918. [2022-10-15 17:29:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5918 states, 2894 states have (on average 1.961644782308224) internal successors, (5677), 5180 states have internal predecessors, (5677), 716 states have call successors, (716), 29 states have call predecessors, (716), 28 states have return successors, (716), 710 states have call predecessors, (716), 716 states have call successors, (716) [2022-10-15 17:29:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5918 states to 5918 states and 7109 transitions. [2022-10-15 17:29:17,134 INFO L78 Accepts]: Start accepts. Automaton has 5918 states and 7109 transitions. Word has length 7 [2022-10-15 17:29:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:29:17,135 INFO L495 AbstractCegarLoop]: Abstraction has 5918 states and 7109 transitions. [2022-10-15 17:29:17,135 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 17:29:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5918 states and 7109 transitions. [2022-10-15 17:29:17,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 17:29:17,136 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:29:17,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:29:17,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-15 17:29:17,137 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 2734 more)] === [2022-10-15 17:29:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:29:17,137 INFO L85 PathProgramCache]: Analyzing trace with hash -318310141, now seen corresponding path program 1 times [2022-10-15 17:29:17,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:29:17,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366225625] [2022-10-15 17:29:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:29:17,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:29:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:29:17,233 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 17:29:17,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:29:17,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366225625] [2022-10-15 17:29:17,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366225625] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:29:17,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:29:17,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-15 17:29:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252388514] [2022-10-15 17:29:17,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:29:17,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:29:17,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:29:17,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:29:17,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:29:17,236 INFO L87 Difference]: Start difference. First operand 5918 states and 7109 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)