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_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:27:22,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:27:22,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:27:22,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:27:22,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:27:22,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:27:22,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:27:22,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:27:22,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:27:22,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:27:22,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:27:22,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:27:22,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:27:22,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:27:22,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:27:22,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:27:22,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:27:22,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:27:22,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:27:22,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:27:22,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:27:22,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:27:22,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:27:22,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:27:22,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 13:27:22,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 13:27:22,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 13:27:22,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 13:27:22,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 13:27:22,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 13:27:22,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:27:22,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:27:22,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:27:22,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:27:22,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:27:22,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:27:22,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:27:22,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:27:22,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:27:22,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:27:22,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:27:22,558 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 13:27:22,573 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:27:22,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:27:22,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:27:22,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:27:22,575 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:27:22,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:27:22,575 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:27:22,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:27:22,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:27:22,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:27:22,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:27:22,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:27:22,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:27:22,577 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:27:22,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:27:22,577 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:27:22,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:27:22,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:27:22,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:27:22,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:27:22,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:27:22,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:27:22,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:27:22,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:27:22,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:27:22,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:27:22,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:27:22,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:27:22,580 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 13:27:22,853 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:27:22,868 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:27:22,872 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:27:22,873 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:27:22,874 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:27:22,874 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2019-10-07 13:27:22,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfc86808/4eff23d640104223a9fb8299a3b42400/FLAGe0acf224b [2019-10-07 13:27:23,487 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:27:23,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2019-10-07 13:27:23,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfc86808/4eff23d640104223a9fb8299a3b42400/FLAGe0acf224b [2019-10-07 13:27:23,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfc86808/4eff23d640104223a9fb8299a3b42400 [2019-10-07 13:27:23,799 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:27:23,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:27:23,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:27:23,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:27:23,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:27:23,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:27:23" (1/1) ... [2019-10-07 13:27:23,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6048e641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:23, skipping insertion in model container [2019-10-07 13:27:23,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:27:23" (1/1) ... [2019-10-07 13:27:23,817 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:27:23,864 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:27:24,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:27:24,334 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:27:24,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:27:24,473 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:27:24,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:24 WrapperNode [2019-10-07 13:27:24,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:27:24,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:27:24,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:27:24,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:27:24,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:24" (1/1) ... [2019-10-07 13:27:24,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:24" (1/1) ... [2019-10-07 13:27:24,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:24" (1/1) ... [2019-10-07 13:27:24,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:24" (1/1) ... [2019-10-07 13:27:24,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:24" (1/1) ... [2019-10-07 13:27:24,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:24" (1/1) ... [2019-10-07 13:27:24,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:24" (1/1) ... [2019-10-07 13:27:24,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:27:24,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:27:24,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:27:24,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:27:24,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:27:24,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:27:24,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:27:24,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-07 13:27:24,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-07 13:27:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-07 13:27:24,608 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-07 13:27:24,609 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2019-10-07 13:27:24,609 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_last [2019-10-07 13:27:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:27:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:27:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-07 13:27:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-07 13:27:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-07 13:27:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-07 13:27:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-07 13:27:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-07 13:27:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-07 13:27:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-07 13:27:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-07 13:27:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-07 13:27:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-07 13:27:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-07 13:27:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-07 13:27:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-07 13:27:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-07 13:27:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-07 13:27:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-07 13:27:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-07 13:27:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-07 13:27:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-07 13:27:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-07 13:27:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-07 13:27:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-07 13:27:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-07 13:27:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-07 13:27:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-07 13:27:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-07 13:27:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-07 13:27:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-07 13:27:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-07 13:27:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-07 13:27:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-07 13:27:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-07 13:27:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-07 13:27:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-07 13:27:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-07 13:27:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-07 13:27:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-07 13:27:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-07 13:27:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-07 13:27:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-07 13:27:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-07 13:27:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-07 13:27:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-07 13:27:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-07 13:27:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-07 13:27:24,619 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-07 13:27:24,619 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-07 13:27:24,619 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-07 13:27:24,619 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-07 13:27:24,619 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-07 13:27:24,619 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-07 13:27:24,620 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 13:27:24,620 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-07 13:27:24,620 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-07 13:27:24,620 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 13:27:24,620 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-07 13:27:24,620 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-07 13:27:24,620 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-07 13:27:24,620 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-07 13:27:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-07 13:27:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-07 13:27:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-07 13:27:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-07 13:27:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-07 13:27:24,621 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 13:27:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-07 13:27:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-07 13:27:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-07 13:27:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-07 13:27:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-07 13:27:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-07 13:27:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-07 13:27:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-07 13:27:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-07 13:27:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-07 13:27:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-07 13:27:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-07 13:27:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-07 13:27:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-07 13:27:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-07 13:27:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-07 13:27:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-07 13:27:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-07 13:27:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-07 13:27:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-07 13:27:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-07 13:27:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-07 13:27:24,625 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-07 13:27:24,625 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-07 13:27:24,625 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-07 13:27:24,625 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-07 13:27:24,625 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-07 13:27:24,625 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-07 13:27:24,625 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-07 13:27:24,625 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-07 13:27:24,625 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-07 13:27:24,625 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-07 13:27:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-07 13:27:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-07 13:27:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-07 13:27:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-07 13:27:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-07 13:27:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-07 13:27:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-07 13:27:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-07 13:27:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-07 13:27:24,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 13:27:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 13:27:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 13:27:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2019-10-07 13:27:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_last [2019-10-07 13:27:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 13:27:24,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 13:27:24,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:27:24,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 13:27:24,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-07 13:27:24,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:27:24,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:27:24,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 13:27:24,995 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-07 13:27:25,267 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:27:25,268 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-07 13:27:25,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:27:25 BoogieIcfgContainer [2019-10-07 13:27:25,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:27:25,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:27:25,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:27:25,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:27:25,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:27:23" (1/3) ... [2019-10-07 13:27:25,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1228b475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:27:25, skipping insertion in model container [2019-10-07 13:27:25,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:27:24" (2/3) ... [2019-10-07 13:27:25,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1228b475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:27:25, skipping insertion in model container [2019-10-07 13:27:25,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:27:25" (3/3) ... [2019-10-07 13:27:25,277 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2019-10-07 13:27:25,287 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:27:25,295 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:27:25,306 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:27:25,331 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:27:25,331 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:27:25,331 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:27:25,332 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:27:25,332 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:27:25,332 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:27:25,332 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:27:25,333 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:27:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-10-07 13:27:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-07 13:27:25,353 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:27:25,354 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 13:27:25,355 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:27:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:27:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash 364535095, now seen corresponding path program 1 times [2019-10-07 13:27:25,366 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:27:25,367 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:25,367 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:25,367 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:27:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:25,620 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 13:27:25,621 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:25,622 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:27:25,622 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 13:27:25,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 13:27:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 13:27:25,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:27:25,643 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 5 states. [2019-10-07 13:27:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:27:25,751 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2019-10-07 13:27:25,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 13:27:25,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-07 13:27:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:27:25,760 INFO L225 Difference]: With dead ends: 66 [2019-10-07 13:27:25,761 INFO L226 Difference]: Without dead ends: 37 [2019-10-07 13:27:25,764 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 13:27:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-07 13:27:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-10-07 13:27:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-07 13:27:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-07 13:27:25,804 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 19 [2019-10-07 13:27:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:27:25,804 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-07 13:27:25,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 13:27:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-07 13:27:25,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-07 13:27:25,806 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:27:25,806 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 13:27:25,807 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:27:25,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:27:25,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1720674643, now seen corresponding path program 1 times [2019-10-07 13:27:25,808 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:27:25,808 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:25,808 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:25,808 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:27:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:25,972 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 13:27:25,972 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:25,972 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:27:25,973 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 13:27:25,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 13:27:25,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 13:27:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 13:27:25,975 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 4 states. [2019-10-07 13:27:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:27:26,009 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-10-07 13:27:26,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 13:27:26,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-10-07 13:27:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:27:26,012 INFO L225 Difference]: With dead ends: 41 [2019-10-07 13:27:26,012 INFO L226 Difference]: Without dead ends: 38 [2019-10-07 13:27:26,013 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 13:27:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-07 13:27:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2019-10-07 13:27:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-07 13:27:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-07 13:27:26,020 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2019-10-07 13:27:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:27:26,020 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-07 13:27:26,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 13:27:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-07 13:27:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-07 13:27:26,022 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:27:26,022 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 13:27:26,022 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:27:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:27:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1872736846, now seen corresponding path program 1 times [2019-10-07 13:27:26,023 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:27:26,023 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:26,023 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:26,023 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:27:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:26,213 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 13:27:26,214 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:26,214 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:27:26,214 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 13:27:26,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 13:27:26,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 13:27:26,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-07 13:27:26,216 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2019-10-07 13:27:26,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:27:26,426 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2019-10-07 13:27:26,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 13:27:26,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2019-10-07 13:27:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:27:26,428 INFO L225 Difference]: With dead ends: 52 [2019-10-07 13:27:26,428 INFO L226 Difference]: Without dead ends: 36 [2019-10-07 13:27:26,429 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-07 13:27:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-07 13:27:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-07 13:27:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-07 13:27:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-07 13:27:26,441 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 36 [2019-10-07 13:27:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:27:26,442 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-07 13:27:26,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 13:27:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-07 13:27:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-07 13:27:26,447 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:27:26,447 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, 1, 1, 1] [2019-10-07 13:27:26,447 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:27:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:27:26,448 INFO L82 PathProgramCache]: Analyzing trace with hash 475312699, now seen corresponding path program 1 times [2019-10-07 13:27:26,448 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:27:26,456 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:26,457 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:26,457 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:27:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:26,568 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 13:27:26,568 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:26,568 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:27:26,569 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 13:27:26,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 13:27:26,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 13:27:26,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 13:27:26,570 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 4 states. [2019-10-07 13:27:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:27:26,644 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-10-07 13:27:26,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 13:27:26,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-10-07 13:27:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:27:26,647 INFO L225 Difference]: With dead ends: 56 [2019-10-07 13:27:26,647 INFO L226 Difference]: Without dead ends: 38 [2019-10-07 13:27:26,650 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:27:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-07 13:27:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-07 13:27:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-07 13:27:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-07 13:27:26,661 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 39 [2019-10-07 13:27:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:27:26,661 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-07 13:27:26,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 13:27:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-07 13:27:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-07 13:27:26,665 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:27:26,665 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, 1, 1, 1] [2019-10-07 13:27:26,665 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:27:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:27:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash 838022678, now seen corresponding path program 1 times [2019-10-07 13:27:26,667 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:27:26,667 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:26,668 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:26,668 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:27:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:27:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:26,799 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 13:27:26,799 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:27:26,800 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:27:26,800 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 13:27:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:27:26,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 13:27:26,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:27:27,007 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 13:27:27,008 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:27:27,105 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 13:27:27,106 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:27:27,136 INFO L162 IcfgInterpreter]: Started Sifa with 34 locations of interest [2019-10-07 13:27:27,137 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:27:27,144 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:27:27,166 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:27:27,167 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:27:27,315 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-07 13:27:27,533 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:27:27,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:27:27,833 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 13:27:27,840 INFO L168 Benchmark]: Toolchain (without parser) took 4038.27 ms. Allocated memory was 136.3 MB in the beginning and 253.2 MB in the end (delta: 116.9 MB). Free memory was 99.9 MB in the beginning and 174.7 MB in the end (delta: -74.8 MB). Peak memory consumption was 42.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:27:27,841 INFO L168 Benchmark]: CDTParser took 1.25 ms. Allocated memory is still 136.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-10-07 13:27:27,842 INFO L168 Benchmark]: CACSL2BoogieTranslator took 672.70 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 99.5 MB in the beginning and 164.2 MB in the end (delta: -64.7 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2019-10-07 13:27:27,848 INFO L168 Benchmark]: Boogie Preprocessor took 72.99 ms. Allocated memory is still 200.8 MB. Free memory was 164.2 MB in the beginning and 161.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2019-10-07 13:27:27,849 INFO L168 Benchmark]: RCFGBuilder took 721.40 ms. Allocated memory is still 200.8 MB. Free memory was 161.4 MB in the beginning and 108.7 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. [2019-10-07 13:27:27,850 INFO L168 Benchmark]: TraceAbstraction took 2565.84 ms. Allocated memory was 200.8 MB in the beginning and 253.2 MB in the end (delta: 52.4 MB). Free memory was 108.0 MB in the beginning and 174.7 MB in the end (delta: -66.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 13:27:27,858 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.25 ms. Allocated memory is still 136.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 672.70 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 99.5 MB in the beginning and 164.2 MB in the end (delta: -64.7 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.99 ms. Allocated memory is still 200.8 MB. Free memory was 164.2 MB in the beginning and 161.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 721.40 ms. Allocated memory is still 200.8 MB. Free memory was 161.4 MB in the beginning and 108.7 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2565.84 ms. Allocated memory was 200.8 MB in the beginning and 253.2 MB in the end (delta: 52.4 MB). Free memory was 108.0 MB in the beginning and 174.7 MB in the end (delta: -66.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ~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...