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/sll2c_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:27:14,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:27:14,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:27:14,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:27:14,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:27:14,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:27:14,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:27:14,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:27:14,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:27:14,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:27:14,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:27:14,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:27:14,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:27:14,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:27:14,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:27:14,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:27:14,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:27:14,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:27:14,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:27:14,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:27:14,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:27:14,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:27:14,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:27:14,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:27:14,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 13:27:14,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 13:27:14,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 13:27:14,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 13:27:14,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 13:27:14,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 13:27:14,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:27:14,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:27:14,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:27:14,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:27:14,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:27:14,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:27:14,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:27:14,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:27:14,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:27:14,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:27:14,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:27:14,858 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 [2019-10-07 13:27:14,872 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:27:14,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:27:14,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:27:14,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:27:14,874 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:27:14,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:27:14,874 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:27:14,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:27:14,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:27:14,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:27:14,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:27:14,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:27:14,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:27:14,875 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:27:14,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:27:14,876 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:27:14,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:27:14,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:27:14,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:27:14,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:27:14,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:27:14,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:27:14,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:27:14,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:27:14,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:27:14,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:27:14,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:27:14,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:27:14,879 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 [2019-10-07 13:27:15,192 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:27:15,205 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:27:15,209 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:27:15,210 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:27:15,210 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:27:15,211 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2c_remove_all.i [2019-10-07 13:27:15,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a66b9771/84010d9d3e954508a838132431a10369/FLAG05b221109 [2019-10-07 13:27:15,874 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:27:15,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all.i [2019-10-07 13:27:15,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a66b9771/84010d9d3e954508a838132431a10369/FLAG05b221109 [2019-10-07 13:27:16,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a66b9771/84010d9d3e954508a838132431a10369 [2019-10-07 13:27:16,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:27:16,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:27:16,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:27:16,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:27:16,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:27:16,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:27:16" (1/1) ... [2019-10-07 13:27:16,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1950c0f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16, skipping insertion in model container [2019-10-07 13:27:16,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:27:16" (1/1) ... [2019-10-07 13:27:16,183 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:27:16,240 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:27:16,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:27:16,696 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:27:16,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:27:16,810 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:27:16,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16 WrapperNode [2019-10-07 13:27:16,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:27:16,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:27:16,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:27:16,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:27:16,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16" (1/1) ... [2019-10-07 13:27:16,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16" (1/1) ... [2019-10-07 13:27:16,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16" (1/1) ... [2019-10-07 13:27:16,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16" (1/1) ... [2019-10-07 13:27:16,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16" (1/1) ... [2019-10-07 13:27:16,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16" (1/1) ... [2019-10-07 13:27:16,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16" (1/1) ... [2019-10-07 13:27:16,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:27:16,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:27:16,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:27:16,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:27:16,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16" (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 [2019-10-07 13:27:16,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:27:16,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:27:16,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-07 13:27:16,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-07 13:27:16,939 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-07 13:27:16,940 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-07 13:27:16,940 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2019-10-07 13:27:16,941 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_first [2019-10-07 13:27:16,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:27:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:27:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-07 13:27:16,943 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-07 13:27:16,943 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-07 13:27:16,943 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-07 13:27:16,943 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-07 13:27:16,943 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-07 13:27:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-07 13:27:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-07 13:27:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-07 13:27:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-07 13:27:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-07 13:27:16,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-07 13:27:16,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-07 13:27:16,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-07 13:27:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-07 13:27:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-07 13:27:16,949 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-07 13:27:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-07 13:27:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-07 13:27:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-07 13:27:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-07 13:27:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-07 13:27:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-07 13:27:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-07 13:27:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-07 13:27:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-07 13:27:16,952 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-07 13:27:16,952 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-07 13:27:16,952 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-07 13:27:16,952 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-07 13:27:16,952 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-07 13:27:16,952 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-07 13:27:16,953 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-07 13:27:16,953 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-07 13:27:16,953 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-07 13:27:16,953 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-07 13:27:16,953 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-07 13:27:16,953 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-07 13:27:16,953 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-07 13:27:16,955 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-07 13:27:16,955 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-07 13:27:16,955 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-07 13:27:16,955 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-07 13:27:16,955 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-07 13:27:16,956 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-07 13:27:16,956 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-07 13:27:16,956 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-07 13:27:16,956 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-07 13:27:16,956 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-07 13:27:16,957 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-07 13:27:16,957 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-07 13:27:16,958 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-07 13:27:16,958 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 13:27:16,959 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-07 13:27:16,959 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-07 13:27:16,959 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 13:27:16,959 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-07 13:27:16,959 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-07 13:27:16,960 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-07 13:27:16,960 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-07 13:27:16,960 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-07 13:27:16,961 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-07 13:27:16,961 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-07 13:27:16,961 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-07 13:27:16,962 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-07 13:27:16,962 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 13:27:16,962 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-07 13:27:16,963 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-07 13:27:16,963 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-07 13:27:16,963 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-07 13:27:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-07 13:27:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-07 13:27:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-07 13:27:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-07 13:27:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-07 13:27:16,964 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-07 13:27:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-07 13:27:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-07 13:27:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-07 13:27:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-07 13:27:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-07 13:27:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-07 13:27:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-07 13:27:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-07 13:27:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-07 13:27:16,965 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-07 13:27:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-07 13:27:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-07 13:27:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-07 13:27:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-07 13:27:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-07 13:27:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-07 13:27:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-07 13:27:16,966 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-07 13:27:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-07 13:27:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-07 13:27:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-07 13:27:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-07 13:27:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-07 13:27:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-07 13:27:16,967 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-07 13:27:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-07 13:27:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-07 13:27:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-07 13:27:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-07 13:27:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-07 13:27:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-07 13:27:16,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 13:27:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 13:27:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 13:27:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2019-10-07 13:27:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_first [2019-10-07 13:27:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 13:27:16,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 13:27:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:27:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 13:27:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-07 13:27:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:27:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:27:16,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 13:27:17,336 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-07 13:27:17,596 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:27:17,596 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-07 13:27:17,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:27:17 BoogieIcfgContainer [2019-10-07 13:27:17,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:27:17,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:27:17,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:27:17,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:27:17,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:27:16" (1/3) ... [2019-10-07 13:27:17,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af03772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:27:17, skipping insertion in model container [2019-10-07 13:27:17,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:16" (2/3) ... [2019-10-07 13:27:17,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af03772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:27:17, skipping insertion in model container [2019-10-07 13:27:17,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:27:17" (3/3) ... [2019-10-07 13:27:17,610 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2019-10-07 13:27:17,629 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:27:17,639 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:27:17,650 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:27:17,670 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:27:17,671 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:27:17,671 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:27:17,671 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:27:17,672 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:27:17,672 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:27:17,672 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:27:17,672 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:27:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-10-07 13:27:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-07 13:27:17,697 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:27:17,698 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:27:17,700 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:27:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:27:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1278397699, now seen corresponding path program 1 times [2019-10-07 13:27:17,715 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:27:17,715 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:17,716 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:17,716 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:27:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:27:17,974 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:17,975 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:27:17,976 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 13:27:17,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 13:27:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 13:27:17,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:27:17,996 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2019-10-07 13:27:18,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:27:18,080 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-10-07 13:27:18,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 13:27:18,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-07 13:27:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:27:18,091 INFO L225 Difference]: With dead ends: 60 [2019-10-07 13:27:18,091 INFO L226 Difference]: Without dead ends: 34 [2019-10-07 13:27:18,094 INFO L606 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 [2019-10-07 13:27:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-07 13:27:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-07 13:27:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-07 13:27:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-07 13:27:18,155 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 19 [2019-10-07 13:27:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:27:18,156 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-07 13:27:18,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 13:27:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-07 13:27:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-07 13:27:18,158 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:27:18,158 INFO L385 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] [2019-10-07 13:27:18,158 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:27:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:27:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1622784751, now seen corresponding path program 1 times [2019-10-07 13:27:18,159 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:27:18,159 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:18,159 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:18,160 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:27:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 13:27:18,312 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:18,313 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:27:18,313 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 13:27:18,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 13:27:18,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 13:27:18,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 13:27:18,315 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2019-10-07 13:27:18,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:27:18,344 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-10-07 13:27:18,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 13:27:18,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-10-07 13:27:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:27:18,348 INFO L225 Difference]: With dead ends: 38 [2019-10-07 13:27:18,348 INFO L226 Difference]: Without dead ends: 35 [2019-10-07 13:27:18,349 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 13:27:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-07 13:27:18,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-07 13:27:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-07 13:27:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-07 13:27:18,358 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2019-10-07 13:27:18,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:27:18,359 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-07 13:27:18,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 13:27:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-07 13:27:18,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-07 13:27:18,360 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:27:18,360 INFO L385 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] [2019-10-07 13:27:18,361 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:27:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:27:18,361 INFO L82 PathProgramCache]: Analyzing trace with hash 824673732, now seen corresponding path program 1 times [2019-10-07 13:27:18,362 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:27:18,362 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:18,362 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:18,362 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:18,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:27:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 13:27:18,510 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:18,510 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:27:18,510 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 13:27:18,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 13:27:18,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 13:27:18,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-07 13:27:18,512 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2019-10-07 13:27:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:27:18,684 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-07 13:27:18,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 13:27:18,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-07 13:27:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:27:18,689 INFO L225 Difference]: With dead ends: 46 [2019-10-07 13:27:18,689 INFO L226 Difference]: Without dead ends: 43 [2019-10-07 13:27:18,690 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-07 13:27:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-07 13:27:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2019-10-07 13:27:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-07 13:27:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-07 13:27:18,700 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 33 [2019-10-07 13:27:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:27:18,700 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-07 13:27:18,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 13:27:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-07 13:27:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-07 13:27:18,702 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:27:18,702 INFO L385 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] [2019-10-07 13:27:18,703 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:27:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:27:18,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1805502586, now seen corresponding path program 1 times [2019-10-07 13:27:18,703 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:27:18,704 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:18,704 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:18,704 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:27:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 13:27:18,998 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:18,998 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:27:18,998 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 13:27:18,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 13:27:18,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 13:27:18,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:27:18,999 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 5 states. [2019-10-07 13:27:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:27:19,132 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-10-07 13:27:19,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 13:27:19,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-07 13:27:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:27:19,134 INFO L225 Difference]: With dead ends: 55 [2019-10-07 13:27:19,134 INFO L226 Difference]: Without dead ends: 38 [2019-10-07 13:27:19,135 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 13:27:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-07 13:27:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-07 13:27:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-07 13:27:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-07 13:27:19,145 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 36 [2019-10-07 13:27:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:27:19,145 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-07 13:27:19,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 13:27:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-07 13:27:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-07 13:27:19,147 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:27:19,147 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:27:19,147 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:27:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:27:19,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1898425887, now seen corresponding path program 1 times [2019-10-07 13:27:19,148 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:27:19,148 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:19,149 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:19,149 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:27:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-07 13:27:19,256 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:19,256 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:27:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:27:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:19,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 13:27:19,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:27:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-07 13:27:19,549 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:27:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-07 13:27:19,617 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:27:19,661 INFO L162 IcfgInterpreter]: Started Sifa with 31 locations of interest [2019-10-07 13:27:19,661 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:27:19,666 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:27:19,671 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:27:19,672 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:27:19,782 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-07 13:27:19,936 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:27:20,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:27:20,239 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: ~head~0.base, ~head~0.offset := #t~ret3.base, #t~ret3.offset;havoc #t~ret3.base, #t~ret3.offset;~last~0.base, ~last~0.offset := ~head~0.base, ~head~0.offset; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) 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: ~head~0.base, ~head~0.offset := #t~ret3.base, #t~ret3.offset;havoc #t~ret3.base, #t~ret3.offset;~last~0.base, ~last~0.offset := ~head~0.base, ~head~0.offset; 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:99) 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:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 13:27:20,244 INFO L168 Benchmark]: Toolchain (without parser) took 4076.57 ms. Allocated memory was 143.7 MB in the beginning and 252.7 MB in the end (delta: 109.1 MB). Free memory was 100.3 MB in the beginning and 146.2 MB in the end (delta: -45.8 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. [2019-10-07 13:27:20,245 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.7 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 13:27:20,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 643.02 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 100.1 MB in the beginning and 166.2 MB in the end (delta: -66.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:27:20,247 INFO L168 Benchmark]: Boogie Preprocessor took 69.52 ms. Allocated memory is still 200.8 MB. Free memory was 166.2 MB in the beginning and 162.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2019-10-07 13:27:20,247 INFO L168 Benchmark]: RCFGBuilder took 716.02 ms. Allocated memory is still 200.8 MB. Free memory was 162.8 MB in the beginning and 111.4 MB in the end (delta: 51.4 MB). Peak memory consumption was 51.4 MB. Max. memory is 7.1 GB. [2019-10-07 13:27:20,248 INFO L168 Benchmark]: TraceAbstraction took 2642.80 ms. Allocated memory was 200.8 MB in the beginning and 252.7 MB in the end (delta: 51.9 MB). Free memory was 111.4 MB in the beginning and 146.2 MB in the end (delta: -34.7 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2019-10-07 13:27:20,253 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 143.7 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 643.02 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 100.1 MB in the beginning and 166.2 MB in the end (delta: -66.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.52 ms. Allocated memory is still 200.8 MB. Free memory was 166.2 MB in the beginning and 162.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 716.02 ms. Allocated memory is still 200.8 MB. Free memory was 162.8 MB in the beginning and 111.4 MB in the end (delta: 51.4 MB). Peak memory consumption was 51.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2642.80 ms. Allocated memory was 200.8 MB in the beginning and 252.7 MB in the end (delta: 51.9 MB). Free memory was 111.4 MB in the beginning and 146.2 MB in the end (delta: -34.7 MB). Peak memory consumption was 17.2 MB. 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: ~head~0.base, ~head~0.offset := #t~ret3.base, #t~ret3.offset;havoc #t~ret3.base, #t~ret3.offset;~last~0.base, ~last~0.offset := ~head~0.base, ~head~0.offset; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ~head~0.base, ~head~0.offset := #t~ret3.base, #t~ret3.offset;havoc #t~ret3.base, #t~ret3.offset;~last~0.base, ~last~0.offset := ~head~0.base, ~head~0.offset;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...