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/heap-manipulation/dll_of_dll-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:59:56,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:59:56,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:59:56,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:59:56,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:59:56,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:59:56,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:59:56,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:59:56,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:59:56,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:59:56,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:59:56,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:59:56,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:59:56,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:59:56,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:59:56,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:59:56,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:59:56,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:59:56,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:59:56,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:59:56,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:59:56,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:59:56,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:59:56,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:59:56,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:59:56,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:59:56,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:59:56,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:59:56,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:59:56,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:59:56,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:59:56,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:59:56,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:59:56,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:59:56,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:59:56,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:59:56,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:59:56,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:59:56,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:59:56,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:59:56,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:59:56,928 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 [2019-10-15 01:59:56,956 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:59:56,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:59:56,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:59:56,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:59:56,959 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:59:56,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:59:56,960 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:59:56,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:59:56,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:59:56,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:59:56,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:59:56,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:59:56,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:59:56,962 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:59:56,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:59:56,963 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:59:56,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:59:56,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:59:56,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:59:56,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:59:56,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:59:56,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:59:56,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:59:56,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:59:56,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:59:56,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:59:56,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:59:56,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:59:56,965 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 [2019-10-15 01:59:57,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:59:57,284 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:59:57,288 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:59:57,290 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:59:57,291 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:59:57,291 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2019-10-15 01:59:57,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92813ef87/a6cbbf29feba424cbc191b02ead19f6a/FLAGf3706ef9a [2019-10-15 01:59:57,961 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:59:57,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2019-10-15 01:59:57,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92813ef87/a6cbbf29feba424cbc191b02ead19f6a/FLAGf3706ef9a [2019-10-15 01:59:58,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92813ef87/a6cbbf29feba424cbc191b02ead19f6a [2019-10-15 01:59:58,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:59:58,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:59:58,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:59:58,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:59:58,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:59:58,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:59:58" (1/1) ... [2019-10-15 01:59:58,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa9aec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:58, skipping insertion in model container [2019-10-15 01:59:58,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:59:58" (1/1) ... [2019-10-15 01:59:58,296 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:59:58,350 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:59:58,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:59:58,896 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:59:58,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:59:59,059 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:59:59,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:59 WrapperNode [2019-10-15 01:59:59,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:59:59,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:59:59,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:59:59,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:59:59,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:59" (1/1) ... [2019-10-15 01:59:59,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:59" (1/1) ... [2019-10-15 01:59:59,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:59" (1/1) ... [2019-10-15 01:59:59,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:59" (1/1) ... [2019-10-15 01:59:59,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:59" (1/1) ... [2019-10-15 01:59:59,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:59" (1/1) ... [2019-10-15 01:59:59,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:59" (1/1) ... [2019-10-15 01:59:59,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:59:59,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:59:59,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:59:59,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:59:59,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:59" (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 [2019-10-15 01:59:59,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:59:59,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:59:59,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2019-10-15 01:59:59,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 01:59:59,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 01:59:59,234 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2019-10-15 01:59:59,234 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2019-10-15 01:59:59,234 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2019-10-15 01:59:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2019-10-15 01:59:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2019-10-15 01:59:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2019-10-15 01:59:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2019-10-15 01:59:59,236 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2019-10-15 01:59:59,236 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2019-10-15 01:59:59,236 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2019-10-15 01:59:59,236 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2019-10-15 01:59:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2019-10-15 01:59:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2019-10-15 01:59:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2019-10-15 01:59:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2019-10-15 01:59:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2019-10-15 01:59:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:59:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:59:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 01:59:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 01:59:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 01:59:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 01:59:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 01:59:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 01:59:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 01:59:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 01:59:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 01:59:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 01:59:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 01:59:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 01:59:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 01:59:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 01:59:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 01:59:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 01:59:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 01:59:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 01:59:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 01:59:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 01:59:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 01:59:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 01:59:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 01:59:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 01:59:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 01:59:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 01:59:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 01:59:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 01:59:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 01:59:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 01:59:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 01:59:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 01:59:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 01:59:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 01:59:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 01:59:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 01:59:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 01:59:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 01:59:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 01:59:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 01:59:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 01:59:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 01:59:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 01:59:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 01:59:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 01:59:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 01:59:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 01:59:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 01:59:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 01:59:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 01:59:59,247 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 01:59:59,247 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 01:59:59,247 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:59:59,247 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 01:59:59,247 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 01:59:59,247 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:59:59,248 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 01:59:59,248 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 01:59:59,248 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 01:59:59,248 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 01:59:59,248 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 01:59:59,248 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 01:59:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 01:59:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 01:59:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 01:59:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:59:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 01:59:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 01:59:59,250 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 01:59:59,250 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 01:59:59,250 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 01:59:59,250 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 01:59:59,250 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 01:59:59,250 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 01:59:59,250 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 01:59:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 01:59:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 01:59:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 01:59:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 01:59:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 01:59:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 01:59:59,251 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 01:59:59,252 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 01:59:59,252 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 01:59:59,252 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 01:59:59,252 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 01:59:59,252 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 01:59:59,252 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 01:59:59,252 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 01:59:59,253 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 01:59:59,253 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 01:59:59,253 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 01:59:59,253 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 01:59:59,253 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 01:59:59,253 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 01:59:59,254 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 01:59:59,254 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 01:59:59,254 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 01:59:59,254 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 01:59:59,254 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 01:59:59,254 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 01:59:59,255 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 01:59:59,255 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 01:59:59,255 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 01:59:59,255 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 01:59:59,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:59:59,255 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2019-10-15 01:59:59,255 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2019-10-15 01:59:59,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:59:59,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:59:59,256 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2019-10-15 01:59:59,256 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2019-10-15 01:59:59,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:59:59,256 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2019-10-15 01:59:59,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:59:59,257 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2019-10-15 01:59:59,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-15 01:59:59,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:59:59,257 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2019-10-15 01:59:59,257 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2019-10-15 01:59:59,258 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2019-10-15 01:59:59,258 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2019-10-15 01:59:59,258 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2019-10-15 01:59:59,258 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2019-10-15 01:59:59,258 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2019-10-15 01:59:59,258 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2019-10-15 01:59:59,259 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2019-10-15 01:59:59,259 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2019-10-15 01:59:59,259 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2019-10-15 01:59:59,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:59:59,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:59:59,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:00:00,313 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:00:00,313 INFO L284 CfgBuilder]: Removed 38 assume(true) statements. [2019-10-15 02:00:00,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:00:00 BoogieIcfgContainer [2019-10-15 02:00:00,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:00:00,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:00:00,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:00:00,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:00:00,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:59:58" (1/3) ... [2019-10-15 02:00:00,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7287b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:00:00, skipping insertion in model container [2019-10-15 02:00:00,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:59" (2/3) ... [2019-10-15 02:00:00,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7287b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:00:00, skipping insertion in model container [2019-10-15 02:00:00,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:00:00" (3/3) ... [2019-10-15 02:00:00,325 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2019-10-15 02:00:00,335 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:00:00,343 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:00:00,355 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:00:00,383 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:00:00,383 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:00:00,383 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:00:00,383 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:00:00,383 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:00:00,384 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:00:00,384 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:00:00,384 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:00:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2019-10-15 02:00:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 02:00:00,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:00:00,416 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:00:00,418 INFO L410 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:00:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:00:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1789971662, now seen corresponding path program 1 times [2019-10-15 02:00:00,434 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:00:00,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048578603] [2019-10-15 02:00:00,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:00:00,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:00:00,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:00:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:00:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 02:00:00,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048578603] [2019-10-15 02:00:00,702 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:00:00,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 02:00:00,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383514110] [2019-10-15 02:00:00,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 02:00:00,707 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:00:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 02:00:00,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:00:00,723 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 2 states. [2019-10-15 02:00:00,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:00:00,796 INFO L93 Difference]: Finished difference Result 279 states and 434 transitions. [2019-10-15 02:00:00,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 02:00:00,798 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 44 [2019-10-15 02:00:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:00:00,811 INFO L225 Difference]: With dead ends: 279 [2019-10-15 02:00:00,811 INFO L226 Difference]: Without dead ends: 133 [2019-10-15 02:00:00,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:00:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-15 02:00:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2019-10-15 02:00:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-15 02:00:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2019-10-15 02:00:00,876 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 44 [2019-10-15 02:00:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:00:00,878 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2019-10-15 02:00:00,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 02:00:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2019-10-15 02:00:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 02:00:00,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:00:00,881 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:00:00,882 INFO L410 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:00:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:00:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash 821243101, now seen corresponding path program 1 times [2019-10-15 02:00:00,883 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:00:00,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893980157] [2019-10-15 02:00:00,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:00:00,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:00:00,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:00:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:00:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 02:00:01,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893980157] [2019-10-15 02:00:01,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:00:01,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2019-10-15 02:00:01,337 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53083721] [2019-10-15 02:00:01,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 02:00:01,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:00:01,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 02:00:01,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-10-15 02:00:01,341 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand 18 states. [2019-10-15 02:00:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:00:02,240 INFO L93 Difference]: Finished difference Result 302 states and 380 transitions. [2019-10-15 02:00:02,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 02:00:02,241 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2019-10-15 02:00:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:00:02,246 INFO L225 Difference]: With dead ends: 302 [2019-10-15 02:00:02,246 INFO L226 Difference]: Without dead ends: 239 [2019-10-15 02:00:02,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2019-10-15 02:00:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-10-15 02:00:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 190. [2019-10-15 02:00:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-10-15 02:00:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 235 transitions. [2019-10-15 02:00:02,310 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 235 transitions. Word has length 45 [2019-10-15 02:00:02,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:00:02,311 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 235 transitions. [2019-10-15 02:00:02,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 02:00:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 235 transitions. [2019-10-15 02:00:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-15 02:00:02,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:00:02,313 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:00:02,313 INFO L410 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:00:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:00:02,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1240464570, now seen corresponding path program 1 times [2019-10-15 02:00:02,314 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:00:02,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658220070] [2019-10-15 02:00:02,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:00:02,315 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:00:02,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:00:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:00:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 02:00:02,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658220070] [2019-10-15 02:00:02,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113284968] [2019-10-15 02:00:02,536 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 [2019-10-15 02:00:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:00:02,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 02:00:02,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:00:02,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 02:00:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 02:00:02,784 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:00:02,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 02:00:03,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 5 terms [2019-10-15 02:00:03,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 02:00:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 02:00:03,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444135760] [2019-10-15 02:00:03,113 INFO L162 IcfgInterpreter]: Started Sifa with 38 locations of interest [2019-10-15 02:00:03,113 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:00:03,120 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:00:03,128 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:00:03,129 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:00:03,294 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2019-10-15 02:00:03,415 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:00:04,001 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2019-10-15 02:00:04,225 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2019-10-15 02:00:04,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:00:04,458 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: expected NNF 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:146) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:275) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:263) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:237) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:216) 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.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.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.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.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 [2019-10-15 02:00:04,464 INFO L168 Benchmark]: Toolchain (without parser) took 6185.40 ms. Allocated memory was 137.4 MB in the beginning and 290.5 MB in the end (delta: 153.1 MB). Free memory was 99.9 MB in the beginning and 246.1 MB in the end (delta: -146.1 MB). Peak memory consumption was 127.0 MB. Max. memory is 7.1 GB. [2019-10-15 02:00:04,464 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-15 02:00:04,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 781.85 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 99.7 MB in the beginning and 163.2 MB in the end (delta: -63.5 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2019-10-15 02:00:04,469 INFO L168 Benchmark]: Boogie Preprocessor took 101.58 ms. Allocated memory is still 201.9 MB. Free memory was 163.2 MB in the beginning and 158.6 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. [2019-10-15 02:00:04,470 INFO L168 Benchmark]: RCFGBuilder took 1147.68 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 158.6 MB in the beginning and 182.4 MB in the end (delta: -23.7 MB). Peak memory consumption was 78.5 MB. Max. memory is 7.1 GB. [2019-10-15 02:00:04,473 INFO L168 Benchmark]: TraceAbstraction took 4145.71 ms. Allocated memory was 233.3 MB in the beginning and 290.5 MB in the end (delta: 57.1 MB). Free memory was 182.4 MB in the beginning and 246.1 MB in the end (delta: -63.7 MB). Peak memory consumption was 113.5 MB. Max. memory is 7.1 GB. [2019-10-15 02:00:04,478 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 781.85 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 99.7 MB in the beginning and 163.2 MB in the end (delta: -63.5 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.58 ms. Allocated memory is still 201.9 MB. Free memory was 163.2 MB in the beginning and 158.6 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1147.68 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 158.6 MB in the beginning and 182.4 MB in the end (delta: -23.7 MB). Peak memory consumption was 78.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4145.71 ms. Allocated memory was 233.3 MB in the beginning and 290.5 MB in the end (delta: 57.1 MB). Free memory was 182.4 MB in the beginning and 246.1 MB in the end (delta: -63.7 MB). Peak memory consumption was 113.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: expected NNF: 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...