java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:47:56,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:47:56,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:47:56,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 01:47:56,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 01:47:56,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 01:47:56,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 01:47:56,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 01:47:56,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 01:47:56,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 01:47:56,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 01:47:56,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 01:47:56,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 01:47:56,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 01:47:56,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 01:47:56,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 01:47:56,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 01:47:56,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 01:47:56,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 01:47:56,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 01:47:56,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 01:47:56,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 01:47:56,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 01:47:56,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 01:47:56,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-10 01:47:56,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-10 01:47:56,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-10 01:47:56,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-10 01:47:56,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-10 01:47:56,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-10 01:47:56,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 01:47:56,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 01:47:56,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 01:47:56,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 01:47:56,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 01:47:56,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 01:47:56,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 01:47:56,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 01:47:56,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:47:56,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:47:56,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:47:56,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 01:47:56,937 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:47:56,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:47:56,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:47:56,938 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:47:56,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:47:56,939 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:47:56,939 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:47:56,940 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:47:56,940 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:47:56,940 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:47:56,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:47:56,941 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:47:56,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:47:56,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:47:56,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:47:56,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:47:56,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:47:56,942 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:47:56,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:47:56,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:47:56,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:47:56,943 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:47:56,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:47:56,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:47:56,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:47:56,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:47:56,945 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:47:56,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:47:56,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:47:56,946 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:47:57,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:47:57,016 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:47:57,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:47:57,022 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:47:57,023 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:47:57,024 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-09-10 01:47:57,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e093adbc5/a7a7799e6edc483b9ef14be00778721b/FLAG1a9528ccd [2019-09-10 01:47:57,629 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:47:57,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-09-10 01:47:57,658 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e093adbc5/a7a7799e6edc483b9ef14be00778721b/FLAG1a9528ccd [2019-09-10 01:47:57,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e093adbc5/a7a7799e6edc483b9ef14be00778721b [2019-09-10 01:47:57,934 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:47:57,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:47:57,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:47:57,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:47:57,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:47:57,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:47:57" (1/1) ... [2019-09-10 01:47:57,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e02a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:57, skipping insertion in model container [2019-09-10 01:47:57,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:47:57" (1/1) ... [2019-09-10 01:47:57,953 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:47:58,005 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:47:58,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:47:58,455 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:47:58,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:47:58,598 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:47:58,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:58 WrapperNode [2019-09-10 01:47:58,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:47:58,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:47:58,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:47:58,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:47:58,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:58" (1/1) ... [2019-09-10 01:47:58,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:58" (1/1) ... [2019-09-10 01:47:58,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:58" (1/1) ... [2019-09-10 01:47:58,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:58" (1/1) ... [2019-09-10 01:47:58,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:58" (1/1) ... [2019-09-10 01:47:58,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:58" (1/1) ... [2019-09-10 01:47:58,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:58" (1/1) ... [2019-09-10 01:47:58,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:47:58,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:47:58,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:47:58,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:47:58,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:58" (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 [2019-09-10 01:47:58,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:47:58,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:47:58,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-09-10 01:47:58,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-09-10 01:47:58,745 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-09-10 01:47:58,745 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-09-10 01:47:58,746 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-09-10 01:47:58,746 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2019-09-10 01:47:58,746 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2019-09-10 01:47:58,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:47:58,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:47:58,746 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-09-10 01:47:58,746 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-09-10 01:47:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-09-10 01:47:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-09-10 01:47:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-09-10 01:47:58,747 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-09-10 01:47:58,748 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-09-10 01:47:58,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-09-10 01:47:58,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-09-10 01:47:58,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-09-10 01:47:58,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-09-10 01:47:58,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-09-10 01:47:58,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-09-10 01:47:58,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-09-10 01:47:58,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-09-10 01:47:58,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-09-10 01:47:58,749 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-09-10 01:47:58,749 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-09-10 01:47:58,750 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-09-10 01:47:58,750 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-09-10 01:47:58,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-09-10 01:47:58,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-09-10 01:47:58,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-09-10 01:47:58,750 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-09-10 01:47:58,751 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-09-10 01:47:58,751 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-09-10 01:47:58,751 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-09-10 01:47:58,751 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-09-10 01:47:58,751 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-09-10 01:47:58,751 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-09-10 01:47:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-09-10 01:47:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-09-10 01:47:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-09-10 01:47:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-09-10 01:47:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-09-10 01:47:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-09-10 01:47:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-09-10 01:47:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-09-10 01:47:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-09-10 01:47:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-09-10 01:47:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-09-10 01:47:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-09-10 01:47:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-09-10 01:47:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-09-10 01:47:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-09-10 01:47:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-09-10 01:47:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-09-10 01:47:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-09-10 01:47:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-09-10 01:47:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-09-10 01:47:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-09-10 01:47:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-09-10 01:47:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-10 01:47:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-09-10 01:47:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-09-10 01:47:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-10 01:47:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-09-10 01:47:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-09-10 01:47:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-09-10 01:47:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-09-10 01:47:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-09-10 01:47:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-09-10 01:47:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-09-10 01:47:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-09-10 01:47:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-09-10 01:47:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-10 01:47:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-09-10 01:47:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-09-10 01:47:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-09-10 01:47:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-09-10 01:47:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-09-10 01:47:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-09-10 01:47:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-09-10 01:47:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-09-10 01:47:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-09-10 01:47:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-09-10 01:47:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-09-10 01:47:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-09-10 01:47:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-09-10 01:47:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-09-10 01:47:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-09-10 01:47:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-09-10 01:47:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-09-10 01:47:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-09-10 01:47:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-09-10 01:47:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-09-10 01:47:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-09-10 01:47:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-09-10 01:47:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-09-10 01:47:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-09-10 01:47:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-09-10 01:47:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-09-10 01:47:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-09-10 01:47:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-09-10 01:47:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-09-10 01:47:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-09-10 01:47:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-09-10 01:47:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-09-10 01:47:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-09-10 01:47:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-09-10 01:47:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-09-10 01:47:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-09-10 01:47:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-09-10 01:47:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-09-10 01:47:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-09-10 01:47:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-09-10 01:47:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-09-10 01:47:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-10 01:47:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-10 01:47:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-10 01:47:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-09-10 01:47:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2019-09-10 01:47:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-10 01:47:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-10 01:47:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2019-09-10 01:47:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:47:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-10 01:47:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-09-10 01:47:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-10 01:47:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:47:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:47:59,163 INFO L684 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-09-10 01:47:59,339 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:47:59,339 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-10 01:47:59,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:47:59 BoogieIcfgContainer [2019-09-10 01:47:59,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:47:59,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:47:59,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:47:59,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:47:59,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:47:57" (1/3) ... [2019-09-10 01:47:59,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3185b85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:47:59, skipping insertion in model container [2019-09-10 01:47:59,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:47:58" (2/3) ... [2019-09-10 01:47:59,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3185b85a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:47:59, skipping insertion in model container [2019-09-10 01:47:59,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:47:59" (3/3) ... [2019-09-10 01:47:59,349 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2019-09-10 01:47:59,358 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:47:59,367 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:47:59,383 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:47:59,413 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:47:59,413 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:47:59,413 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:47:59,414 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:47:59,414 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:47:59,414 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:47:59,414 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:47:59,414 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:47:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-09-10 01:47:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-10 01:47:59,439 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:47:59,440 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 01:47:59,442 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:47:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:47:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1196981672, now seen corresponding path program 1 times [2019-09-10 01:47:59,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:47:59,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:47:59,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:47:59,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:47:59,519 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:47:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:47:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:47:59,683 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:47:59,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 01:47:59,687 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:47:59,693 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:47:59,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:47:59,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:47:59,712 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 2 states. [2019-09-10 01:47:59,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:47:59,731 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2019-09-10 01:47:59,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:47:59,732 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2019-09-10 01:47:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:47:59,742 INFO L225 Difference]: With dead ends: 50 [2019-09-10 01:47:59,742 INFO L226 Difference]: Without dead ends: 36 [2019-09-10 01:47:59,744 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:47:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-10 01:47:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-10 01:47:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-10 01:47:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-09-10 01:47:59,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2019-09-10 01:47:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:47:59,784 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-09-10 01:47:59,784 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:47:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-09-10 01:47:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-10 01:47:59,785 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:47:59,785 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 01:47:59,785 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:47:59,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:47:59,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1196990321, now seen corresponding path program 1 times [2019-09-10 01:47:59,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:47:59,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:47:59,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:47:59,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:47:59,789 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:47:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:48:00,138 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:00,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-09-10 01:48:00,139 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:00,143 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-10 01:48:00,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-10 01:48:00,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:48:00,144 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 10 states. [2019-09-10 01:48:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:00,343 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-09-10 01:48:00,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-10 01:48:00,343 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-09-10 01:48:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:00,345 INFO L225 Difference]: With dead ends: 40 [2019-09-10 01:48:00,345 INFO L226 Difference]: Without dead ends: 40 [2019-09-10 01:48:00,346 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-10 01:48:00,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-10 01:48:00,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-09-10 01:48:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-10 01:48:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-09-10 01:48:00,353 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2019-09-10 01:48:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:00,353 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-09-10 01:48:00,354 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-10 01:48:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-09-10 01:48:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-10 01:48:00,355 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:00,355 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 01:48:00,355 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:00,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1196988647, now seen corresponding path program 1 times [2019-09-10 01:48:00,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:00,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:00,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:00,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:00,358 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:48:00,441 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:00,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 01:48:00,442 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:00,442 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 01:48:00,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 01:48:00,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 01:48:00,443 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 5 states. [2019-09-10 01:48:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:00,489 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-09-10 01:48:00,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:48:00,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-09-10 01:48:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:00,490 INFO L225 Difference]: With dead ends: 45 [2019-09-10 01:48:00,491 INFO L226 Difference]: Without dead ends: 42 [2019-09-10 01:48:00,491 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-10 01:48:00,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-10 01:48:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2019-09-10 01:48:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-10 01:48:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-09-10 01:48:00,501 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2019-09-10 01:48:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:00,501 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-09-10 01:48:00,503 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 01:48:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-09-10 01:48:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-10 01:48:00,506 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:00,506 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2019-09-10 01:48:00,507 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:00,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:00,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1608181309, now seen corresponding path program 1 times [2019-09-10 01:48:00,507 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:00,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:00,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:00,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:00,510 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:48:00,593 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:48:00,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 01:48:00,594 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:00,594 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 01:48:00,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 01:48:00,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:48:00,595 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 3 states. [2019-09-10 01:48:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:00,617 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-10 01:48:00,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 01:48:00,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2019-09-10 01:48:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:00,621 INFO L225 Difference]: With dead ends: 42 [2019-09-10 01:48:00,621 INFO L226 Difference]: Without dead ends: 42 [2019-09-10 01:48:00,623 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:48:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-10 01:48:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-09-10 01:48:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-10 01:48:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-09-10 01:48:00,630 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2019-09-10 01:48:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:00,630 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-09-10 01:48:00,630 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 01:48:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-09-10 01:48:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-10 01:48:00,631 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:48:00,631 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2019-09-10 01:48:00,632 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:48:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1474167803, now seen corresponding path program 1 times [2019-09-10 01:48:00,632 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:48:00,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:00,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:48:00,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:48:00,634 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:48:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:48:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:48:00,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:48:00,709 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:48:00,709 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2019-09-10 01:48:00,711 INFO L207 CegarAbsIntRunner]: [21], [27], [29], [30], [31], [32], [33], [35], [37], [46], [49], [62], [67], [74], [76], [82], [84], [89], [91], [95], [96], [97], [99], [102], [106], [107], [113], [114], [115], [116], [121], [122], [123], [124], [125] [2019-09-10 01:48:00,743 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:48:00,744 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:48:00,799 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 01:48:00,801 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 0. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 32 variables. [2019-09-10 01:48:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:48:00,805 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 01:48:00,838 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-10 01:48:00,838 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 01:48:00,843 INFO L420 sIntCurrentIteration]: We unified 34 AI predicates to 34 [2019-09-10 01:48:00,844 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 01:48:00,845 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:48:00,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 6 [2019-09-10 01:48:00,846 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:48:00,846 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:48:00,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:48:00,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:48:00,847 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 2 states. [2019-09-10 01:48:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:48:00,848 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-10 01:48:00,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:48:00,848 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2019-09-10 01:48:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:48:00,848 INFO L225 Difference]: With dead ends: 6 [2019-09-10 01:48:00,848 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:48:00,849 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:48:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:48:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:48:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:48:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:48:00,850 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2019-09-10 01:48:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:48:00,850 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:48:00,850 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:48:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:48:00,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:48:00,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:48:00 BoogieIcfgContainer [2019-09-10 01:48:00,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:48:00,860 INFO L168 Benchmark]: Toolchain (without parser) took 2923.44 ms. Allocated memory was 132.6 MB in the beginning and 222.8 MB in the end (delta: 90.2 MB). Free memory was 86.5 MB in the beginning and 121.0 MB in the end (delta: -34.5 MB). Peak memory consumption was 55.7 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:00,861 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 132.6 MB. Free memory was 107.1 MB in the beginning and 106.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 01:48:00,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.28 ms. Allocated memory was 132.6 MB in the beginning and 198.7 MB in the end (delta: 66.1 MB). Free memory was 86.3 MB in the beginning and 158.7 MB in the end (delta: -72.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:00,863 INFO L168 Benchmark]: Boogie Preprocessor took 76.11 ms. Allocated memory is still 198.7 MB. Free memory was 158.7 MB in the beginning and 156.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:00,864 INFO L168 Benchmark]: RCFGBuilder took 665.08 ms. Allocated memory is still 198.7 MB. Free memory was 155.6 MB in the beginning and 108.1 MB in the end (delta: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:00,865 INFO L168 Benchmark]: TraceAbstraction took 1515.58 ms. Allocated memory was 198.7 MB in the beginning and 222.8 MB in the end (delta: 24.1 MB). Free memory was 107.5 MB in the beginning and 121.0 MB in the end (delta: -13.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-09-10 01:48:00,869 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 132.6 MB. Free memory was 107.1 MB in the beginning and 106.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 662.28 ms. Allocated memory was 132.6 MB in the beginning and 198.7 MB in the end (delta: 66.1 MB). Free memory was 86.3 MB in the beginning and 158.7 MB in the end (delta: -72.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.11 ms. Allocated memory is still 198.7 MB. Free memory was 158.7 MB in the beginning and 156.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 665.08 ms. Allocated memory is still 198.7 MB. Free memory was 155.6 MB in the beginning and 108.1 MB in the end (delta: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1515.58 ms. Allocated memory was 198.7 MB in the beginning and 222.8 MB in the end (delta: 24.1 MB). Free memory was 107.5 MB in the beginning and 121.0 MB in the end (delta: -13.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 627]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 57 locations, 1 error locations. SAFE Result, 1.4s OverallTime, 5 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 168 SDtfs, 37 SDslu, 351 SDs, 0 SdLazy, 99 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9705882352941176 AbsIntWeakeningRatio, 1.6764705882352942 AbsIntAvgWeakeningVarsNumRemoved, 0.17647058823529413 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 8777 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 1/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...