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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/list-simple/dll2c_update_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 22:56:22,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 22:56:22,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 22:56:22,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 22:56:22,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 22:56:22,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 22:56:22,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 22:56:22,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 22:56:22,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 22:56:22,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 22:56:22,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 22:56:22,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 22:56:22,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 22:56:22,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 22:56:22,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 22:56:22,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 22:56:22,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 22:56:22,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 22:56:22,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 22:56:22,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 22:56:22,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 22:56:22,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 22:56:22,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 22:56:22,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 22:56:22,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 22:56:22,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 22:56:22,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 22:56:22,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 22:56:22,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 22:56:22,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 22:56:22,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 22:56:22,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 22:56:22,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 22:56:22,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 22:56:22,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 22:56:22,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 22:56:22,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 22:56:22,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 22:56:22,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 22:56:22,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 22:56:22,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 22:56:22,878 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 [2019-10-13 22:56:22,897 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 22:56:22,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 22:56:22,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 22:56:22,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 22:56:22,903 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 22:56:22,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 22:56:22,904 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 22:56:22,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 22:56:22,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 22:56:22,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 22:56:22,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 22:56:22,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 22:56:22,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 22:56:22,906 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 22:56:22,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 22:56:22,907 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 22:56:22,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 22:56:22,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 22:56:22,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 22:56:22,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 22:56:22,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 22:56:22,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 22:56:22,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 22:56:22,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 22:56:22,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 22:56:22,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 22:56:22,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 22:56:22,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 22:56:22,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 22:56:23,212 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 22:56:23,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 22:56:23,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 22:56:23,230 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 22:56:23,231 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 22:56:23,232 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_update_all_reverse.i [2019-10-13 22:56:23,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e943eb39/ca6db106324a4dfe9d2346d06932b8cd/FLAG7c3223e61 [2019-10-13 22:56:23,847 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 22:56:23,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_update_all_reverse.i [2019-10-13 22:56:23,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e943eb39/ca6db106324a4dfe9d2346d06932b8cd/FLAG7c3223e61 [2019-10-13 22:56:24,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e943eb39/ca6db106324a4dfe9d2346d06932b8cd [2019-10-13 22:56:24,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 22:56:24,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 22:56:24,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 22:56:24,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 22:56:24,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 22:56:24,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:56:24" (1/1) ... [2019-10-13 22:56:24,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ce73c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24, skipping insertion in model container [2019-10-13 22:56:24,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:56:24" (1/1) ... [2019-10-13 22:56:24,181 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 22:56:24,229 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 22:56:24,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:56:24,660 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 22:56:24,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:56:24,768 INFO L192 MainTranslator]: Completed translation [2019-10-13 22:56:24,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24 WrapperNode [2019-10-13 22:56:24,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 22:56:24,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 22:56:24,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 22:56:24,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 22:56:24,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24" (1/1) ... [2019-10-13 22:56:24,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24" (1/1) ... [2019-10-13 22:56:24,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24" (1/1) ... [2019-10-13 22:56:24,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24" (1/1) ... [2019-10-13 22:56:24,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24" (1/1) ... [2019-10-13 22:56:24,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24" (1/1) ... [2019-10-13 22:56:24,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24" (1/1) ... [2019-10-13 22:56:24,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 22:56:24,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 22:56:24,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 22:56:24,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 22:56:24,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24" (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 [2019-10-13 22:56:24,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 22:56:24,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 22:56:24,916 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-13 22:56:24,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-13 22:56:24,917 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-13 22:56:24,917 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-13 22:56:24,917 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2019-10-13 22:56:24,917 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2019-10-13 22:56:24,918 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_get_data_at [2019-10-13 22:56:24,918 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_update_at [2019-10-13 22:56:24,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 22:56:24,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 22:56:24,918 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-13 22:56:24,919 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-13 22:56:24,919 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-13 22:56:24,919 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-13 22:56:24,919 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-13 22:56:24,919 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-13 22:56:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-13 22:56:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-13 22:56:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-13 22:56:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-13 22:56:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-13 22:56:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-13 22:56:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-13 22:56:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-13 22:56:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-13 22:56:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-13 22:56:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-13 22:56:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-13 22:56:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-13 22:56:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-13 22:56:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-13 22:56:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-13 22:56:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-13 22:56:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-13 22:56:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-13 22:56:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-13 22:56:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-13 22:56:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-13 22:56:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-13 22:56:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-13 22:56:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-13 22:56:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-13 22:56:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-13 22:56:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-13 22:56:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-13 22:56:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-13 22:56:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-13 22:56:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-13 22:56:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-13 22:56:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-13 22:56:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-13 22:56:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-13 22:56:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-13 22:56:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-13 22:56:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-13 22:56:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-13 22:56:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-13 22:56:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-13 22:56:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-13 22:56:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-13 22:56:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-13 22:56:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-13 22:56:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 22:56:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 22:56:24,927 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-13 22:56:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 22:56:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-13 22:56:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-13 22:56:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-13 22:56:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-13 22:56:24,928 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-13 22:56:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-13 22:56:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-13 22:56:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-13 22:56:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-13 22:56:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 22:56:24,929 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-13 22:56:24,930 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-13 22:56:24,930 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-13 22:56:24,930 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-13 22:56:24,930 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-13 22:56:24,930 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-13 22:56:24,930 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-13 22:56:24,931 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-13 22:56:24,931 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-13 22:56:24,931 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-13 22:56:24,931 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-13 22:56:24,931 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-13 22:56:24,931 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-13 22:56:24,931 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-13 22:56:24,932 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-13 22:56:24,932 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-13 22:56:24,932 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-13 22:56:24,932 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-13 22:56:24,932 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-13 22:56:24,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-13 22:56:24,933 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-13 22:56:24,933 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-13 22:56:24,933 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-13 22:56:24,933 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-13 22:56:24,933 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-13 22:56:24,933 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-13 22:56:24,933 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-13 22:56:24,934 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-13 22:56:24,934 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-13 22:56:24,934 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-13 22:56:24,934 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-13 22:56:24,934 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-13 22:56:24,934 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-13 22:56:24,934 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-13 22:56:24,935 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-13 22:56:24,935 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-13 22:56:24,935 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-13 22:56:24,935 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-13 22:56:24,935 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-13 22:56:24,935 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-13 22:56:24,935 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-13 22:56:24,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 22:56:24,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 22:56:24,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 22:56:24,936 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2019-10-13 22:56:24,936 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2019-10-13 22:56:24,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 22:56:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 22:56:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_get_data_at [2019-10-13 22:56:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 22:56:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_update_at [2019-10-13 22:56:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 22:56:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 22:56:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 22:56:25,379 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-13 22:56:25,748 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 22:56:25,748 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-13 22:56:25,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:56:25 BoogieIcfgContainer [2019-10-13 22:56:25,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 22:56:25,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 22:56:25,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 22:56:25,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 22:56:25,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:56:24" (1/3) ... [2019-10-13 22:56:25,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2baa34a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:56:25, skipping insertion in model container [2019-10-13 22:56:25,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:24" (2/3) ... [2019-10-13 22:56:25,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2baa34a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:56:25, skipping insertion in model container [2019-10-13 22:56:25,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:56:25" (3/3) ... [2019-10-13 22:56:25,769 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_update_all_reverse.i [2019-10-13 22:56:25,781 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 22:56:25,799 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 22:56:25,826 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 22:56:25,856 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 22:56:25,857 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 22:56:25,857 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 22:56:25,857 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 22:56:25,857 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 22:56:25,858 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 22:56:25,858 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 22:56:25,858 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 22:56:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2019-10-13 22:56:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 22:56:25,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:56:25,889 INFO L380 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] [2019-10-13 22:56:25,891 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:56:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:56:25,898 INFO L82 PathProgramCache]: Analyzing trace with hash 246515482, now seen corresponding path program 1 times [2019-10-13 22:56:25,906 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:56:25,906 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394740671] [2019-10-13 22:56:25,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:56:25,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:56:25,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:56:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:56:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:56:26,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394740671] [2019-10-13 22:56:26,236 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:56:26,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 22:56:26,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581901154] [2019-10-13 22:56:26,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 22:56:26,242 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:56:26,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 22:56:26,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 22:56:26,256 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 4 states. [2019-10-13 22:56:26,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:56:26,365 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-10-13 22:56:26,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 22:56:26,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-13 22:56:26,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:56:26,378 INFO L225 Difference]: With dead ends: 76 [2019-10-13 22:56:26,378 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 22:56:26,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:56:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 22:56:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2019-10-13 22:56:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 22:56:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-10-13 22:56:26,445 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 25 [2019-10-13 22:56:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:56:26,446 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-10-13 22:56:26,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 22:56:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-10-13 22:56:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 22:56:26,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:56:26,450 INFO L380 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] [2019-10-13 22:56:26,450 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:56:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:56:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2069588377, now seen corresponding path program 1 times [2019-10-13 22:56:26,452 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:56:26,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657633703] [2019-10-13 22:56:26,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:56:26,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:56:26,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:56:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:56:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:56:26,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657633703] [2019-10-13 22:56:26,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549442366] [2019-10-13 22:56:26,702 INFO L94 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 [2019-10-13 22:56:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:56:26,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 22:56:26,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:56:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 22:56:26,872 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:56:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 22:56:26,965 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 22:56:26,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [13] total 14 [2019-10-13 22:56:26,965 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521170491] [2019-10-13 22:56:26,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 22:56:26,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:56:26,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 22:56:26,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-13 22:56:26,968 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2019-10-13 22:56:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:56:27,052 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2019-10-13 22:56:27,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 22:56:27,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-10-13 22:56:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:56:27,054 INFO L225 Difference]: With dead ends: 55 [2019-10-13 22:56:27,054 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 22:56:27,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 22:56:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 22:56:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-10-13 22:56:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 22:56:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-13 22:56:27,063 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2019-10-13 22:56:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:56:27,063 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-13 22:56:27,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 22:56:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-13 22:56:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 22:56:27,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:56:27,065 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-10-13 22:56:27,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:56:27,279 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:56:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:56:27,280 INFO L82 PathProgramCache]: Analyzing trace with hash -110051892, now seen corresponding path program 1 times [2019-10-13 22:56:27,280 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:56:27,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547472537] [2019-10-13 22:56:27,281 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:56:27,281 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:56:27,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:56:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:56:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 22:56:27,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547472537] [2019-10-13 22:56:27,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134261423] [2019-10-13 22:56:27,526 INFO L94 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 [2019-10-13 22:56:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:56:27,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 22:56:27,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:56:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 22:56:27,707 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:56:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 22:56:27,802 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 22:56:27,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [10] total 12 [2019-10-13 22:56:27,804 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452619657] [2019-10-13 22:56:27,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 22:56:27,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:56:27,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 22:56:27,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2019-10-13 22:56:27,806 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 7 states. [2019-10-13 22:56:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:56:27,912 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2019-10-13 22:56:27,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 22:56:27,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-10-13 22:56:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:56:27,923 INFO L225 Difference]: With dead ends: 60 [2019-10-13 22:56:27,923 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 22:56:27,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-10-13 22:56:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 22:56:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-10-13 22:56:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 22:56:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-10-13 22:56:27,942 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 38 [2019-10-13 22:56:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:56:27,944 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-10-13 22:56:27,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 22:56:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-10-13 22:56:27,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 22:56:27,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:56:27,951 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-10-13 22:56:28,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:56:28,155 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:56:28,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:56:28,155 INFO L82 PathProgramCache]: Analyzing trace with hash 688594833, now seen corresponding path program 1 times [2019-10-13 22:56:28,155 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:56:28,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78493485] [2019-10-13 22:56:28,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:56:28,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:56:28,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:56:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:56:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 22:56:28,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78493485] [2019-10-13 22:56:28,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434503148] [2019-10-13 22:56:28,253 INFO L94 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 [2019-10-13 22:56:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:56:28,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 22:56:28,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:56:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 22:56:28,403 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:56:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 22:56:28,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [115062694] [2019-10-13 22:56:28,484 INFO L162 IcfgInterpreter]: Started Sifa with 33 locations of interest [2019-10-13 22:56:28,484 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 22:56:28,494 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 22:56:28,502 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 22:56:28,503 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 22:56:28,624 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-13 22:56:28,876 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 22:56:29,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:56:29,195 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 22:56:29,200 INFO L168 Benchmark]: Toolchain (without parser) took 5032.35 ms. Allocated memory was 144.7 MB in the beginning and 248.5 MB in the end (delta: 103.8 MB). Free memory was 100.9 MB in the beginning and 193.7 MB in the end (delta: -92.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-10-13 22:56:29,201 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-10-13 22:56:29,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 601.68 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 100.7 MB in the beginning and 166.8 MB in the end (delta: -66.2 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2019-10-13 22:56:29,203 INFO L168 Benchmark]: Boogie Preprocessor took 75.26 ms. Allocated memory is still 201.9 MB. Free memory was 166.8 MB in the beginning and 163.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2019-10-13 22:56:29,203 INFO L168 Benchmark]: RCFGBuilder took 904.49 ms. Allocated memory is still 201.9 MB. Free memory was 163.5 MB in the beginning and 101.8 MB in the end (delta: 61.7 MB). Peak memory consumption was 61.7 MB. Max. memory is 7.1 GB. [2019-10-13 22:56:29,204 INFO L168 Benchmark]: TraceAbstraction took 3445.87 ms. Allocated memory was 201.9 MB in the beginning and 248.5 MB in the end (delta: 46.7 MB). Free memory was 101.8 MB in the beginning and 193.7 MB in the end (delta: -91.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-13 22:56:29,208 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 601.68 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 100.7 MB in the beginning and 166.8 MB in the end (delta: -66.2 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.26 ms. Allocated memory is still 201.9 MB. Free memory was 166.8 MB in the beginning and 163.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 904.49 ms. Allocated memory is still 201.9 MB. Free memory was 163.5 MB in the beginning and 101.8 MB in the end (delta: 61.7 MB). Peak memory consumption was 61.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3445.87 ms. Allocated memory was 201.9 MB in the beginning and 248.5 MB in the end (delta: 46.7 MB). Free memory was 101.8 MB in the beginning and 193.7 MB in the end (delta: -91.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...