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/dll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:25:18,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:25:18,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:25:18,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:25:18,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:25:18,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:25:18,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:25:18,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:25:18,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:25:18,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:25:18,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:25:18,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:25:18,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:25:18,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:25:18,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:25:18,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:25:18,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:25:18,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:25:18,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:25:18,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:25:18,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:25:18,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:25:18,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:25:18,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:25:18,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 13:25:18,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 13:25:18,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 13:25:18,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 13:25:18,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 13:25:18,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 13:25:18,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:25:18,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:25:18,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:25:18,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:25:18,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:25:18,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:25:18,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:25:18,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:25:18,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:25:18,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:25:18,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:25:18,737 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 13:25:18,756 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:25:18,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:25:18,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:25:18,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:25:18,759 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:25:18,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:25:18,760 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:25:18,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:25:18,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:25:18,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:25:18,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:25:18,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:25:18,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:25:18,762 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:25:18,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:25:18,763 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:25:18,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:25:18,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:25:18,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:25:18,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:25:18,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:25:18,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:25:18,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:25:18,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:25:18,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:25:18,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:25:18,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:25:18,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:25:18,765 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 13:25:19,086 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:25:19,110 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:25:19,113 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:25:19,115 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:25:19,115 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:25:19,116 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-10-07 13:25:19,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24ad20507/9fe9636932ba43bd8f67705ed6446a55/FLAG47e27b60e [2019-10-07 13:25:19,725 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:25:19,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-10-07 13:25:19,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24ad20507/9fe9636932ba43bd8f67705ed6446a55/FLAG47e27b60e [2019-10-07 13:25:19,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24ad20507/9fe9636932ba43bd8f67705ed6446a55 [2019-10-07 13:25:19,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:25:19,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:25:19,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:25:19,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:25:19,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:25:19,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:25:19" (1/1) ... [2019-10-07 13:25:19,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4771d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:19, skipping insertion in model container [2019-10-07 13:25:19,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:25:19" (1/1) ... [2019-10-07 13:25:19,980 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:25:20,016 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:25:20,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:25:20,476 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:25:20,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:25:20,593 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:25:20,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:20 WrapperNode [2019-10-07 13:25:20,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:25:20,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:25:20,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:25:20,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:25:20,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:20" (1/1) ... [2019-10-07 13:25:20,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:20" (1/1) ... [2019-10-07 13:25:20,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:20" (1/1) ... [2019-10-07 13:25:20,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:20" (1/1) ... [2019-10-07 13:25:20,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:20" (1/1) ... [2019-10-07 13:25:20,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:20" (1/1) ... [2019-10-07 13:25:20,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:20" (1/1) ... [2019-10-07 13:25:20,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:25:20,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:25:20,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:25:20,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:25:20,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:20" (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 13:25:20,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:25:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:25:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-07 13:25:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-07 13:25:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-07 13:25:20,731 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-07 13:25:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-10-07 13:25:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2019-10-07 13:25:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2019-10-07 13:25:20,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:25:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:25:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-07 13:25:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-07 13:25:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-07 13:25:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-07 13:25:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-07 13:25:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-07 13:25:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-07 13:25:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-07 13:25:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-07 13:25:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-07 13:25:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-07 13:25:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-07 13:25:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-07 13:25:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-07 13:25:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-07 13:25:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-07 13:25:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-07 13:25:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-07 13:25:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-07 13:25:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-07 13:25:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-07 13:25:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-07 13:25:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-07 13:25:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-07 13:25:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-07 13:25:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-07 13:25:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-07 13:25:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-07 13:25:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-07 13:25:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-07 13:25:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-07 13:25:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-07 13:25:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-07 13:25:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-07 13:25:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-07 13:25:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-07 13:25:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-07 13:25:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-07 13:25:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-07 13:25:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-07 13:25:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-07 13:25:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-07 13:25:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-07 13:25:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-07 13:25:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-07 13:25:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-07 13:25:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-07 13:25:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-07 13:25:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-07 13:25:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-07 13:25:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-07 13:25:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-07 13:25:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 13:25:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-07 13:25:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-07 13:25:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 13:25:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-07 13:25:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-07 13:25:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-07 13:25:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-07 13:25:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-07 13:25:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-07 13:25:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-07 13:25:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-07 13:25:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-07 13:25:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 13:25:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-07 13:25:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-07 13:25:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-07 13:25:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-07 13:25:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-07 13:25:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-07 13:25:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-07 13:25:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-07 13:25:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-07 13:25:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-07 13:25:20,753 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-07 13:25:20,753 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-07 13:25:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-07 13:25:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-07 13:25:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-07 13:25:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-07 13:25:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-07 13:25:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-07 13:25:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-07 13:25:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-07 13:25:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-07 13:25:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-07 13:25:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-07 13:25:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-07 13:25:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-07 13:25:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-07 13:25:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-07 13:25:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-07 13:25:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-07 13:25:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-07 13:25:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-07 13:25:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-07 13:25:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-07 13:25:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-07 13:25:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-07 13:25:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-07 13:25:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-07 13:25:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-07 13:25:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-07 13:25:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-07 13:25:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-07 13:25:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 13:25:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 13:25:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 13:25:20,759 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-10-07 13:25:20,759 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2019-10-07 13:25:20,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 13:25:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 13:25:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2019-10-07 13:25:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:25:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 13:25:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-07 13:25:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 13:25:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:25:20,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:25:21,139 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-07 13:25:21,498 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:25:21,498 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-07 13:25:21,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:25:21 BoogieIcfgContainer [2019-10-07 13:25:21,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:25:21,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:25:21,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:25:21,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:25:21,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:25:19" (1/3) ... [2019-10-07 13:25:21,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe8f97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:25:21, skipping insertion in model container [2019-10-07 13:25:21,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:25:20" (2/3) ... [2019-10-07 13:25:21,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe8f97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:25:21, skipping insertion in model container [2019-10-07 13:25:21,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:25:21" (3/3) ... [2019-10-07 13:25:21,509 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2019-10-07 13:25:21,520 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:25:21,529 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:25:21,542 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:25:21,571 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:25:21,571 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:25:21,571 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:25:21,571 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:25:21,572 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:25:21,572 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:25:21,572 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:25:21,572 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:25:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-10-07 13:25:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-07 13:25:21,601 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:25:21,602 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:25:21,604 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:25:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:25:21,611 INFO L82 PathProgramCache]: Analyzing trace with hash 198379973, now seen corresponding path program 1 times [2019-10-07 13:25:21,621 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:25:21,622 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:25:21,622 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:25:21,622 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:25:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:25:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:25:22,013 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 13:25:22,013 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:25:22,014 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:25:22,015 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-07 13:25:22,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 13:25:22,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 13:25:22,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-07 13:25:22,037 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 9 states. [2019-10-07 13:25:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:25:22,279 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2019-10-07 13:25:22,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-07 13:25:22,281 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2019-10-07 13:25:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:25:22,292 INFO L225 Difference]: With dead ends: 58 [2019-10-07 13:25:22,292 INFO L226 Difference]: Without dead ends: 31 [2019-10-07 13:25:22,300 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-07 13:25:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-07 13:25:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-10-07 13:25:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-07 13:25:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-07 13:25:22,354 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-10-07 13:25:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:25:22,354 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-07 13:25:22,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 13:25:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-07 13:25:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-07 13:25:22,355 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:25:22,356 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:25:22,356 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:25:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:25:22,357 INFO L82 PathProgramCache]: Analyzing trace with hash 198294196, now seen corresponding path program 1 times [2019-10-07 13:25:22,357 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:25:22,357 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:25:22,357 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:25:22,357 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:25:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:25:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:25:22,451 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 13:25:22,452 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:25:22,452 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:25:22,452 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 13:25:22,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 13:25:22,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 13:25:22,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:25:22,456 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2019-10-07 13:25:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:25:22,536 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2019-10-07 13:25:22,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 13:25:22,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-07 13:25:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:25:22,537 INFO L225 Difference]: With dead ends: 49 [2019-10-07 13:25:22,537 INFO L226 Difference]: Without dead ends: 31 [2019-10-07 13:25:22,539 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 13:25:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-07 13:25:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-07 13:25:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-07 13:25:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-07 13:25:22,546 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2019-10-07 13:25:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:25:22,546 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-07 13:25:22,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 13:25:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-07 13:25:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-07 13:25:22,547 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:25:22,547 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:25:22,548 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:25:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:25:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash 56430375, now seen corresponding path program 1 times [2019-10-07 13:25:22,548 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:25:22,549 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:25:22,549 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:25:22,549 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:25:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:25:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:25:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:25:22,665 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:25:22,665 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:25:22,666 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 13:25:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:25:22,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-07 13:25:22,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:25:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:25:22,910 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:25:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:25:23,044 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:25:23,102 INFO L162 IcfgInterpreter]: Started Sifa with 26 locations of interest [2019-10-07 13:25:23,103 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:25:23,111 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:25:23,122 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:25:23,126 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:25:23,345 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-07 13:25:23,580 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:25:23,866 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:25:24,365 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:25:24,809 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:25:24,879 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:25:24,938 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:25:24,948 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:25:25,818 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:25:26,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:25:26,110 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java: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: ε at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java: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 13:25:26,118 INFO L168 Benchmark]: Toolchain (without parser) took 6153.98 ms. Allocated memory was 136.8 MB in the beginning and 293.1 MB in the end (delta: 156.2 MB). Free memory was 99.2 MB in the beginning and 248.6 MB in the end (delta: -149.4 MB). Peak memory consumption was 6.9 MB. Max. memory is 7.1 GB. [2019-10-07 13:25:26,118 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 13:25:26,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 629.12 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 98.8 MB in the beginning and 166.1 MB in the end (delta: -67.3 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2019-10-07 13:25:26,120 INFO L168 Benchmark]: Boogie Preprocessor took 68.00 ms. Allocated memory is still 200.8 MB. Free memory was 166.1 MB in the beginning and 163.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:25:26,120 INFO L168 Benchmark]: RCFGBuilder took 837.49 ms. Allocated memory is still 200.8 MB. Free memory was 163.0 MB in the beginning and 100.9 MB in the end (delta: 62.1 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:25:26,121 INFO L168 Benchmark]: TraceAbstraction took 4614.26 ms. Allocated memory was 200.8 MB in the beginning and 293.1 MB in the end (delta: 92.3 MB). Free memory was 100.9 MB in the beginning and 248.6 MB in the end (delta: -147.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 13:25:26,124 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 629.12 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 98.8 MB in the beginning and 166.1 MB in the end (delta: -67.3 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.00 ms. Allocated memory is still 200.8 MB. Free memory was 166.1 MB in the beginning and 163.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 837.49 ms. Allocated memory is still 200.8 MB. Free memory was 163.0 MB in the beginning and 100.9 MB in the end (delta: 62.1 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4614.26 ms. Allocated memory was 200.8 MB in the beginning and 293.1 MB in the end (delta: 92.3 MB). Free memory was 100.9 MB in the beginning and 248.6 MB in the end (delta: -147.7 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: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...