/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:26:01,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:26:01,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:26:01,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:26:01,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:26:01,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:26:01,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:26:01,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:26:01,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:26:01,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:26:01,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:26:01,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:26:01,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:26:01,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:26:01,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:26:01,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:26:01,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:26:01,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:26:01,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:26:01,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:26:01,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:26:01,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:26:01,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:26:01,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:26:01,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:26:01,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:26:01,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:26:01,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:26:01,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:26:01,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:26:01,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:26:01,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:26:01,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:26:01,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:26:01,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:26:01,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:26:01,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:26:01,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:26:01,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:26:01,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:26:01,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:26:01,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:26:01,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:26:01,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:26:01,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:26:01,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:26:01,765 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:26:01,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:26:01,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:26:01,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:26:01,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:26:01,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:26:01,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:26:01,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:26:01,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:26:01,767 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:26:01,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:26:01,768 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:26:01,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:26:01,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:26:01,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:26:01,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:26:01,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:26:01,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:26:01,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:26:01,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:26:01,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:26:01,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:26:01,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:26:01,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:26:01,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:26:01,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:26:02,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:26:02,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:26:02,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:26:02,206 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:26:02,207 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:26:02,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-10-23 18:26:02,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ea8e67ac/7716231e0c7a40fbb883eb187ca3aa1f/FLAG6a38cd30b [2020-10-23 18:26:03,065 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:26:03,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list2.c_1.i [2020-10-23 18:26:03,080 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ea8e67ac/7716231e0c7a40fbb883eb187ca3aa1f/FLAG6a38cd30b [2020-10-23 18:26:03,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ea8e67ac/7716231e0c7a40fbb883eb187ca3aa1f [2020-10-23 18:26:03,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:26:03,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:26:03,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:26:03,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:26:03,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:26:03,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:03" (1/1) ... [2020-10-23 18:26:03,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f75fb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:03, skipping insertion in model container [2020-10-23 18:26:03,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:03" (1/1) ... [2020-10-23 18:26:03,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:26:03,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:26:03,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:26:03,950 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:26:04,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:26:04,148 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:26:04,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:04 WrapperNode [2020-10-23 18:26:04,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:26:04,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:26:04,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:26:04,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:26:04,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:04" (1/1) ... [2020-10-23 18:26:04,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:04" (1/1) ... [2020-10-23 18:26:04,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:04" (1/1) ... [2020-10-23 18:26:04,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:04" (1/1) ... [2020-10-23 18:26:04,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:04" (1/1) ... [2020-10-23 18:26:04,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:04" (1/1) ... [2020-10-23 18:26:04,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:04" (1/1) ... [2020-10-23 18:26:04,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:26:04,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:26:04,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:26:04,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:26:04,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:26:04,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:26:04,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:26:04,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:26:04,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-10-23 18:26:04,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __getMemory [2020-10-23 18:26:04,325 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2020-10-23 18:26:04,325 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-10-23 18:26:04,325 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-10-23 18:26:04,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:26:04,325 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:26:04,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:26:04,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:26:04,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:26:04,326 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-10-23 18:26:04,326 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-10-23 18:26:04,326 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-10-23 18:26:04,327 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-10-23 18:26:04,327 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-10-23 18:26:04,327 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-10-23 18:26:04,327 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-10-23 18:26:04,327 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-10-23 18:26:04,327 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-10-23 18:26:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-10-23 18:26:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-10-23 18:26:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-10-23 18:26:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-10-23 18:26:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-10-23 18:26:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-10-23 18:26:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-10-23 18:26:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-10-23 18:26:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-10-23 18:26:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-10-23 18:26:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-10-23 18:26:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-10-23 18:26:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-10-23 18:26:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-10-23 18:26:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-10-23 18:26:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-10-23 18:26:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-10-23 18:26:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-10-23 18:26:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-10-23 18:26:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-10-23 18:26:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-10-23 18:26:04,331 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-10-23 18:26:04,331 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-10-23 18:26:04,331 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-10-23 18:26:04,331 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-10-23 18:26:04,331 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-10-23 18:26:04,331 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-10-23 18:26:04,332 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-10-23 18:26:04,332 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-10-23 18:26:04,332 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-10-23 18:26:04,332 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-10-23 18:26:04,332 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-10-23 18:26:04,332 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-10-23 18:26:04,332 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-10-23 18:26:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-10-23 18:26:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-10-23 18:26:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-10-23 18:26:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-10-23 18:26:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-10-23 18:26:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-10-23 18:26:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-10-23 18:26:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-10-23 18:26:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-10-23 18:26:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-10-23 18:26:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-10-23 18:26:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-10-23 18:26:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-10-23 18:26:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-10-23 18:26:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-10-23 18:26:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-10-23 18:26:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-10-23 18:26:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-10-23 18:26:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-10-23 18:26:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-10-23 18:26:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-10-23 18:26:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-10-23 18:26:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-10-23 18:26:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-10-23 18:26:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-10-23 18:26:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-10-23 18:26:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-10-23 18:26:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-10-23 18:26:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-10-23 18:26:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-10-23 18:26:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-10-23 18:26:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-10-23 18:26:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-10-23 18:26:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-10-23 18:26:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-10-23 18:26:04,339 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-10-23 18:26:04,339 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-10-23 18:26:04,339 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-10-23 18:26:04,339 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-10-23 18:26:04,339 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-10-23 18:26:04,339 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-10-23 18:26:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-10-23 18:26:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-10-23 18:26:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-10-23 18:26:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-10-23 18:26:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-10-23 18:26:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-10-23 18:26:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-10-23 18:26:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-10-23 18:26:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-10-23 18:26:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-10-23 18:26:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-10-23 18:26:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-10-23 18:26:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-10-23 18:26:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-10-23 18:26:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-10-23 18:26:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-10-23 18:26:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-10-23 18:26:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-10-23 18:26:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:26:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:26:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 18:26:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:26:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 18:26:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-10-23 18:26:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 18:26:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-10-23 18:26:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-10-23 18:26:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-10-23 18:26:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-10-23 18:26:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-10-23 18:26:04,345 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-10-23 18:26:04,345 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-10-23 18:26:04,345 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-10-23 18:26:04,345 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-10-23 18:26:04,345 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-10-23 18:26:04,345 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-10-23 18:26:04,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:26:04,346 INFO L130 BoogieDeclarations]: Found specification of procedure __getMemory [2020-10-23 18:26:04,346 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2020-10-23 18:26:04,346 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-10-23 18:26:04,346 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-10-23 18:26:04,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:26:04,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:26:04,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:26:04,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-23 18:26:04,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:26:04,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:26:04,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:26:04,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:26:04,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:26:04,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:26:05,029 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:26:05,030 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:26:05,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:05 BoogieIcfgContainer [2020-10-23 18:26:05,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:26:05,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:26:05,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:26:05,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:26:05,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:26:03" (1/3) ... [2020-10-23 18:26:05,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2fba7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:05, skipping insertion in model container [2020-10-23 18:26:05,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:04" (2/3) ... [2020-10-23 18:26:05,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2fba7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:05, skipping insertion in model container [2020-10-23 18:26:05,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:05" (3/3) ... [2020-10-23 18:26:05,043 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-10-23 18:26:05,055 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:26:05,060 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:26:05,074 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:26:05,113 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:26:05,114 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:26:05,114 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:26:05,114 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:26:05,114 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:26:05,115 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:26:05,115 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:26:05,115 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:26:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-10-23 18:26:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-23 18:26:05,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:05,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:05,143 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:05,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:05,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1851277019, now seen corresponding path program 1 times [2020-10-23 18:26:05,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:05,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846849852] [2020-10-23 18:26:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:05,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:05,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846849852] [2020-10-23 18:26:05,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:05,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:26:05,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788262653] [2020-10-23 18:26:05,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:26:05,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:05,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:26:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:26:05,499 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 7 states. [2020-10-23 18:26:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:05,983 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2020-10-23 18:26:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:26:05,985 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-23 18:26:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:05,996 INFO L225 Difference]: With dead ends: 95 [2020-10-23 18:26:05,996 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 18:26:06,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:26:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 18:26:06,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-10-23 18:26:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:26:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-23 18:26:06,051 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 14 [2020-10-23 18:26:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:06,052 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-23 18:26:06,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:26:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-23 18:26:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:26:06,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:06,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:06,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:26:06,055 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:06,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1540837999, now seen corresponding path program 1 times [2020-10-23 18:26:06,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:06,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696593750] [2020-10-23 18:26:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:06,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:06,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:06,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:06,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:26:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:06,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:26:06,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696593750] [2020-10-23 18:26:06,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:06,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 18:26:06,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723129181] [2020-10-23 18:26:06,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:26:06,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:06,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:26:06,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:26:06,411 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2020-10-23 18:26:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:06,791 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-10-23 18:26:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:26:06,793 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-23 18:26:06,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:06,796 INFO L225 Difference]: With dead ends: 71 [2020-10-23 18:26:06,796 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:26:06,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:26:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:26:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-23 18:26:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:26:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-23 18:26:06,826 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 39 [2020-10-23 18:26:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:06,827 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-23 18:26:06,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:26:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-23 18:26:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:26:06,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:06,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:06,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:26:06,830 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:06,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1035279374, now seen corresponding path program 1 times [2020-10-23 18:26:06,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:06,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730709467] [2020-10-23 18:26:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:07,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:07,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:07,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:07,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:26:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:07,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:26:07,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730709467] [2020-10-23 18:26:07,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452510806] [2020-10-23 18:26:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:07,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-23 18:26:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:26:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:26:07,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:26:07,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 20 [2020-10-23 18:26:07,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417530388] [2020-10-23 18:26:07,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:26:07,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:07,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:26:07,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:26:07,853 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 13 states. [2020-10-23 18:26:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:08,464 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-10-23 18:26:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:26:08,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-23 18:26:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:08,468 INFO L225 Difference]: With dead ends: 81 [2020-10-23 18:26:08,468 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 18:26:08,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:26:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 18:26:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-10-23 18:26:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 18:26:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-10-23 18:26:08,489 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 39 [2020-10-23 18:26:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:08,490 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-10-23 18:26:08,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:26:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-10-23 18:26:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 18:26:08,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:08,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:08,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:26:08,706 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:08,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1962936705, now seen corresponding path program 1 times [2020-10-23 18:26:08,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:08,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690193464] [2020-10-23 18:26:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:08,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:08,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:08,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:08,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:26:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:08,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:08,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-23 18:26:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:26:08,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690193464] [2020-10-23 18:26:08,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248997434] [2020-10-23 18:26:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:09,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-23 18:26:09,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:26:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:26:09,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:26:09,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20] total 28 [2020-10-23 18:26:09,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195000433] [2020-10-23 18:26:09,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 18:26:09,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:09,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 18:26:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:26:09,850 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 28 states. [2020-10-23 18:26:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:11,841 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2020-10-23 18:26:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:26:11,842 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-10-23 18:26:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:11,843 INFO L225 Difference]: With dead ends: 119 [2020-10-23 18:26:11,844 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:26:11,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 18:26:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:26:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2020-10-23 18:26:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 18:26:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-23 18:26:11,878 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 46 [2020-10-23 18:26:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:11,878 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-23 18:26:11,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 18:26:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-23 18:26:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 18:26:11,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:11,880 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:12,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:12,094 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:12,095 INFO L82 PathProgramCache]: Analyzing trace with hash -937444706, now seen corresponding path program 1 times [2020-10-23 18:26:12,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:12,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808132978] [2020-10-23 18:26:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:26:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-23 18:26:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:26:12,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808132978] [2020-10-23 18:26:12,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397254969] [2020-10-23 18:26:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:12,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-23 18:26:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:26:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:13,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:26:13,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 29 [2020-10-23 18:26:13,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004909485] [2020-10-23 18:26:13,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 18:26:13,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:13,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 18:26:13,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:26:13,161 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 29 states. [2020-10-23 18:26:14,224 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-23 18:26:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:14,923 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2020-10-23 18:26:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:26:14,923 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2020-10-23 18:26:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:14,925 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:26:14,925 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 18:26:14,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 18:26:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 18:26:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-23 18:26:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-23 18:26:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-10-23 18:26:14,951 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 46 [2020-10-23 18:26:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:14,952 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-10-23 18:26:14,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 18:26:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-10-23 18:26:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 18:26:14,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:14,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:15,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:15,157 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:15,158 INFO L82 PathProgramCache]: Analyzing trace with hash -257386336, now seen corresponding path program 1 times [2020-10-23 18:26:15,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:15,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716640808] [2020-10-23 18:26:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:15,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:15,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:15,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:15,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:26:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:15,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:15,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-23 18:26:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:26:15,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716640808] [2020-10-23 18:26:15,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183667897] [2020-10-23 18:26:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:15,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-23 18:26:15,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:26:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:16,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:26:16,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-10-23 18:26:16,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920725449] [2020-10-23 18:26:16,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 18:26:16,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:16,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 18:26:16,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:26:16,146 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 28 states. [2020-10-23 18:26:17,177 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-23 18:26:17,327 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-23 18:26:17,838 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-23 18:26:18,118 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-23 18:26:18,272 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-23 18:26:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:18,309 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2020-10-23 18:26:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 18:26:18,310 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-10-23 18:26:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:18,312 INFO L225 Difference]: With dead ends: 104 [2020-10-23 18:26:18,312 INFO L226 Difference]: Without dead ends: 81 [2020-10-23 18:26:18,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=309, Invalid=1583, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 18:26:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-23 18:26:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2020-10-23 18:26:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-23 18:26:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-23 18:26:18,328 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 46 [2020-10-23 18:26:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:18,329 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-23 18:26:18,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 18:26:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-23 18:26:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-23 18:26:18,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:18,331 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:18,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:18,544 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash -460784880, now seen corresponding path program 1 times [2020-10-23 18:26:18,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:18,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202196110] [2020-10-23 18:26:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:18,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:18,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:18,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:18,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:26:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:18,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:18,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-23 18:26:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:18,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:26:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:18,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 18:26:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:26:18,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202196110] [2020-10-23 18:26:18,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558172810] [2020-10-23 18:26:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:19,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-23 18:26:19,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:26:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:26:19,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:26:19,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2020-10-23 18:26:19,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145584619] [2020-10-23 18:26:19,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-23 18:26:19,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-23 18:26:19,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:26:19,828 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 35 states. [2020-10-23 18:26:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:22,461 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2020-10-23 18:26:22,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 18:26:22,462 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 58 [2020-10-23 18:26:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:22,464 INFO L225 Difference]: With dead ends: 107 [2020-10-23 18:26:22,464 INFO L226 Difference]: Without dead ends: 85 [2020-10-23 18:26:22,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=389, Invalid=3151, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 18:26:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-23 18:26:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-23 18:26:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-23 18:26:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-10-23 18:26:22,481 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 58 [2020-10-23 18:26:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:22,481 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-10-23 18:26:22,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-23 18:26:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-10-23 18:26:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-23 18:26:22,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:22,483 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:22,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:26:22,693 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:22,694 INFO L82 PathProgramCache]: Analyzing trace with hash 219273490, now seen corresponding path program 1 times [2020-10-23 18:26:22,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:22,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832427555] [2020-10-23 18:26:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:22,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:22,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:22,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:26:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:23,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:23,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-23 18:26:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:23,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:26:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:23,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 18:26:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-23 18:26:23,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832427555] [2020-10-23 18:26:23,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879344090] [2020-10-23 18:26:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-23 18:26:23,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:26:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:26:23,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:26:23,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 31 [2020-10-23 18:26:23,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715974565] [2020-10-23 18:26:23,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 18:26:23,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:23,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 18:26:23,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:26:23,755 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 31 states. [2020-10-23 18:26:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:25,219 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-23 18:26:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:26:25,219 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 58 [2020-10-23 18:26:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:25,224 INFO L225 Difference]: With dead ends: 78 [2020-10-23 18:26:25,224 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:26:25,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 18:26:25,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:26:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-10-23 18:26:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 18:26:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-23 18:26:25,248 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 58 [2020-10-23 18:26:25,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:25,250 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-23 18:26:25,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 18:26:25,250 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-23 18:26:25,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-23 18:26:25,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:25,253 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:25,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:25,461 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:25,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash -791843760, now seen corresponding path program 1 times [2020-10-23 18:26:25,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:25,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137193846] [2020-10-23 18:26:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:25,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:25,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:25,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:25,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-23 18:26:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:25,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-23 18:26:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:25,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-23 18:26:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:25,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:26:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:25,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 18:26:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:26:26,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137193846] [2020-10-23 18:26:26,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784409823] [2020-10-23 18:26:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-23 18:26:26,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:26:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 18:26:26,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:26:26,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2020-10-23 18:26:26,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007745161] [2020-10-23 18:26:26,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 18:26:26,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:26,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 18:26:26,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:26:26,465 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 28 states. [2020-10-23 18:26:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:28,292 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-10-23 18:26:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 18:26:28,293 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-10-23 18:26:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:28,295 INFO L225 Difference]: With dead ends: 83 [2020-10-23 18:26:28,295 INFO L226 Difference]: Without dead ends: 76 [2020-10-23 18:26:28,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 18:26:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-23 18:26:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-23 18:26:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-23 18:26:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-23 18:26:28,311 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 58 [2020-10-23 18:26:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:28,312 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-23 18:26:28,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 18:26:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-23 18:26:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-23 18:26:28,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:28,314 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:28,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:26:28,528 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:28,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1240769085, now seen corresponding path program 1 times [2020-10-23 18:26:28,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:28,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987151355] [2020-10-23 18:26:28,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:26:28,547 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:26:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:26:28,567 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:26:28,607 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:26:28,607 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:26:28,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:26:28,650 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 62 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-10-23 18:26:28,652 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: IntegerLiteral 61 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# [2020-10-23 18:26:28,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:26:28 BoogieIcfgContainer [2020-10-23 18:26:28,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:26:28,711 INFO L168 Benchmark]: Toolchain (without parser) took 25302.83 ms. Allocated memory was 161.5 MB in the beginning and 336.6 MB in the end (delta: 175.1 MB). Free memory was 136.7 MB in the beginning and 266.5 MB in the end (delta: -129.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:28,712 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 101.2 MB in the end (delta: 120.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:26:28,712 INFO L168 Benchmark]: CACSL2BoogieTranslator took 737.00 ms. Allocated memory is still 161.5 MB. Free memory was 136.1 MB in the beginning and 143.2 MB in the end (delta: -7.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:28,713 INFO L168 Benchmark]: Boogie Preprocessor took 93.09 ms. Allocated memory is still 161.5 MB. Free memory was 143.2 MB in the beginning and 140.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:28,714 INFO L168 Benchmark]: RCFGBuilder took 787.49 ms. Allocated memory is still 161.5 MB. Free memory was 140.0 MB in the beginning and 138.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 41.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:28,717 INFO L168 Benchmark]: TraceAbstraction took 23669.92 ms. Allocated memory was 161.5 MB in the beginning and 336.6 MB in the end (delta: 175.1 MB). Free memory was 138.0 MB in the beginning and 266.5 MB in the end (delta: -128.5 MB). Peak memory consumption was 46.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:28,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 101.2 MB in the end (delta: 120.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 737.00 ms. Allocated memory is still 161.5 MB. Free memory was 136.1 MB in the beginning and 143.2 MB in the end (delta: -7.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 93.09 ms. Allocated memory is still 161.5 MB. Free memory was 143.2 MB in the beginning and 140.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 787.49 ms. Allocated memory is still 161.5 MB. Free memory was 140.0 MB in the beginning and 138.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 41.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23669.92 ms. Allocated memory was 161.5 MB in the beginning and 336.6 MB in the end (delta: 175.1 MB). Free memory was 138.0 MB in the beginning and 266.5 MB in the end (delta: -128.5 MB). Peak memory consumption was 46.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 62 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IntegerLiteral 61 could not be translated for associated CType STRUCT~~list_head?prev~*list_head?next~*list_head# * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L869] void * guard_malloc_counter = 0; [L889] struct list_head *elem = ((void *)0); [L902] static struct list_head head; VAL [\old(elem)=49, \old(elem)=53, \old(guard_malloc_counter)=51, \old(guard_malloc_counter)=60, \old(head)=null, \old(head)=null, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L905] struct list_head *dev1, *dev2; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L906] CALL, EXPR my_malloc(sizeof(*dev1)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L881] CALL, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L873] (size > 0) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={3:0}, size=8] [L874] guard_malloc_counter++ [L875] COND FALSE !(!__VERIFIER_nondet_int()) [L877] return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, \result={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}, size=8] [L881] RET, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, __getMemory(size)={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}, size=8] [L881] return __getMemory(size); [L906] RET, EXPR my_malloc(sizeof(*dev1)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}, my_malloc(sizeof(*dev1))={0:1}] [L906] dev1 = my_malloc(sizeof(*dev1)) [L907] CALL, EXPR my_malloc(sizeof(*dev2)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}] [L881] CALL, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}] [L873] (size > 0) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={3:0}, size=8] [L874] guard_malloc_counter++ [L875] COND FALSE !(!__VERIFIER_nondet_int()) [L877] return (void *) guard_malloc_counter; VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, \result={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, size=8] [L881] RET, EXPR __getMemory(size) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, __getMemory(size)={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, size=8] [L881] return __getMemory(size); [L907] RET, EXPR my_malloc(sizeof(*dev2)) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, my_malloc(sizeof(*dev2))={0:2}] [L907] dev2 = my_malloc(sizeof(*dev2)) [L908] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}] [L909] CALL list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, new={0:2}] [L892] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:2}, new={0:2}] [L893] COND TRUE __VERIFIER_nondet_int() [L894] elem = new VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:2}, new={0:2}] [L909] RET list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L910] CALL list_add(dev1, &head) VAL [\old(elem)=2, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, new={0:1}] [L892] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=2, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:2}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:1}, new={0:1}] [L893] COND TRUE __VERIFIER_nondet_int() [L894] elem = new VAL [\old(elem)=2, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:1}, new={0:1}] [L910] RET list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L911] CALL list_del(dev2) VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, entry={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L898] COND FALSE !(entry==elem) VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, entry={0:2}, entry={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L911] RET list_del(dev2) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L912] CALL list_add(dev2, &head) VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, new={0:2}] [L892] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:2}, new={0:2}] [L893] COND FALSE !(__VERIFIER_nondet_int()) [L912] RET list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L915] CALL list_add(dev1, &head) VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, new={0:1}] [L892] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}, head={3:0}, head={3:0}, new={0:1}, new={0:1}] [L892] CALL __blast_assert () VAL [\old(elem)=0, \old(elem)=1, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L8] CALL reach_error() VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L3] __assert_fail("0", "rule60_list2.c_1.i", 3, "reach_error") VAL [\old(elem)=1, \old(elem)=0, \old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.4s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 13.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 367 SDtfs, 620 SDslu, 1199 SDs, 0 SdLazy, 6996 SolverSat, 708 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 698 GetRequests, 377 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 66 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 820 NumberOfCodeBlocks, 820 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 739 ConstructedInterpolants, 0 QuantifiedInterpolants, 164331 SizeOfPredicates, 49 NumberOfNonLiveVariables, 2319 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 139/237 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...