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/sll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:00:19,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:00:19,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:00:19,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:00:19,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:00:19,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:00:19,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:00:19,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:00:19,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:00:19,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:00:19,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:00:19,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:00:19,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:00:19,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:00:19,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:00:19,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:00:19,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:00:19,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:00:19,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:00:19,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:00:19,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:00:19,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:00:19,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:00:19,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:00:19,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:00:19,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:00:19,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:00:19,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:00:19,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:00:19,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:00:19,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:00:19,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:00:19,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:00:19,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:00:19,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:00:19,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:00:19,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:00:19,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:00:19,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:00:19,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:00:19,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:00:19,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:00:19,776 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:00:19,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:00:19,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:00:19,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:00:19,779 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:00:19,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:00:19,779 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:00:19,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:00:19,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:00:19,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:00:19,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:00:19,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:00:19,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:00:19,782 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:00:19,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:00:19,782 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:00:19,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:00:19,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:00:19,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:00:19,783 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:00:19,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:00:19,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:00:19,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:00:19,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:00:19,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:00:19,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:00:19,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:00:19,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:00:19,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:00:20,076 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:00:20,093 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:00:20,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:00:20,098 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:00:20,099 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:00:20,099 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_prepend_equal.i [2019-10-15 03:00:20,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3a58c99f/6556d634474840c3976753ed1efd285b/FLAGbc2184608 [2019-10-15 03:00:20,782 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:00:20,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_prepend_equal.i [2019-10-15 03:00:20,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3a58c99f/6556d634474840c3976753ed1efd285b/FLAGbc2184608 [2019-10-15 03:00:21,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3a58c99f/6556d634474840c3976753ed1efd285b [2019-10-15 03:00:21,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:00:21,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:00:21,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:21,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:00:21,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:00:21,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:21" (1/1) ... [2019-10-15 03:00:21,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2e1afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21, skipping insertion in model container [2019-10-15 03:00:21,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:21" (1/1) ... [2019-10-15 03:00:21,110 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:00:21,167 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:00:21,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:21,647 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:00:21,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:21,757 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:00:21,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21 WrapperNode [2019-10-15 03:00:21,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:21,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:00:21,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:00:21,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:00:21,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21" (1/1) ... [2019-10-15 03:00:21,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21" (1/1) ... [2019-10-15 03:00:21,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21" (1/1) ... [2019-10-15 03:00:21,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21" (1/1) ... [2019-10-15 03:00:21,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21" (1/1) ... [2019-10-15 03:00:21,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21" (1/1) ... [2019-10-15 03:00:21,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21" (1/1) ... [2019-10-15 03:00:21,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:00:21,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:00:21,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:00:21,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:00:21,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:00:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:00:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:00:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 03:00:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 03:00:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-15 03:00:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-15 03:00:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-15 03:00:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-10-15 03:00:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_prepend [2019-10-15 03:00:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:00:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:00:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 03:00:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 03:00:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 03:00:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 03:00:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 03:00:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 03:00:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 03:00:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 03:00:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 03:00:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 03:00:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 03:00:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 03:00:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 03:00:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 03:00:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 03:00:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 03:00:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 03:00:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 03:00:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 03:00:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 03:00:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 03:00:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 03:00:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 03:00:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 03:00:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 03:00:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 03:00:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 03:00:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 03:00:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 03:00:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 03:00:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 03:00:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 03:00:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 03:00:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 03:00:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 03:00:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 03:00:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 03:00:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 03:00:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 03:00:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 03:00:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 03:00:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 03:00:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 03:00:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 03:00:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 03:00:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 03:00:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 03:00:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 03:00:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 03:00:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 03:00:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 03:00:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 03:00:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:00:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 03:00:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 03:00:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:00:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 03:00:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 03:00:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 03:00:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 03:00:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 03:00:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 03:00:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 03:00:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 03:00:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 03:00:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:00:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 03:00:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 03:00:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 03:00:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 03:00:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 03:00:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 03:00:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 03:00:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 03:00:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 03:00:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 03:00:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 03:00:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 03:00:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 03:00:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 03:00:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 03:00:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 03:00:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 03:00:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 03:00:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 03:00:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 03:00:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 03:00:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 03:00:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 03:00:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 03:00:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 03:00:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 03:00:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 03:00:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 03:00:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 03:00:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 03:00:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 03:00:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 03:00:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 03:00:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 03:00:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 03:00:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 03:00:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 03:00:21,884 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 03:00:21,884 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 03:00:21,884 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-15 03:00:21,884 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-15 03:00:21,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:00:21,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:00:21,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:00:21,885 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-15 03:00:21,885 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-10-15 03:00:21,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:00:21,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:00:21,885 INFO L130 BoogieDeclarations]: Found specification of procedure sll_prepend [2019-10-15 03:00:21,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:00:21,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:00:21,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-15 03:00:21,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:00:21,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:00:21,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:00:22,273 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-15 03:00:22,497 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:00:22,497 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:00:22,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:22 BoogieIcfgContainer [2019-10-15 03:00:22,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:00:22,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:00:22,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:00:22,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:00:22,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:00:21" (1/3) ... [2019-10-15 03:00:22,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af74954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:22, skipping insertion in model container [2019-10-15 03:00:22,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:21" (2/3) ... [2019-10-15 03:00:22,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af74954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:22, skipping insertion in model container [2019-10-15 03:00:22,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:22" (3/3) ... [2019-10-15 03:00:22,507 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2019-10-15 03:00:22,518 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:00:22,526 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:00:22,538 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:00:22,565 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:00:22,565 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:00:22,565 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:00:22,565 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:00:22,566 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:00:22,566 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:00:22,566 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:00:22,566 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:00:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-15 03:00:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 03:00:22,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:22,592 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:22,594 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:22,599 INFO L82 PathProgramCache]: Analyzing trace with hash -324553769, now seen corresponding path program 1 times [2019-10-15 03:00:22,609 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:22,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744531799] [2019-10-15 03:00:22,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:22,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:22,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:22,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744531799] [2019-10-15 03:00:22,883 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:00:22,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:00:22,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875904676] [2019-10-15 03:00:22,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:00:22,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:22,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:00:22,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:00:22,906 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2019-10-15 03:00:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:23,048 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-15 03:00:23,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:00:23,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-15 03:00:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:23,060 INFO L225 Difference]: With dead ends: 71 [2019-10-15 03:00:23,060 INFO L226 Difference]: Without dead ends: 30 [2019-10-15 03:00:23,066 INFO L600 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 [2019-10-15 03:00:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-15 03:00:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-10-15 03:00:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 03:00:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-10-15 03:00:23,116 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2019-10-15 03:00:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:23,116 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-10-15 03:00:23,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:00:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-10-15 03:00:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 03:00:23,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:23,119 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:23,119 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:23,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1409021135, now seen corresponding path program 1 times [2019-10-15 03:00:23,120 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:23,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348655206] [2019-10-15 03:00:23,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:23,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:23,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:00:23,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348655206] [2019-10-15 03:00:23,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574401970] [2019-10-15 03:00:23,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:23,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:00:23,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:23,525 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:00:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:00:23,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1048961507] [2019-10-15 03:00:23,722 INFO L162 IcfgInterpreter]: Started Sifa with 26 locations of interest [2019-10-15 03:00:23,722 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:00:23,730 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:00:23,739 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:00:23,739 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:00:23,913 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 03:00:24,164 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:26,368 INFO L199 IcfgInterpreter]: Interpreting procedure sll_prepend with input of size 39 for LOIs [2019-10-15 03:00:26,503 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 44 for LOIs [2019-10-15 03:00:28,105 INFO L199 IcfgInterpreter]: Interpreting procedure node_create with input of size 40 for LOIs [2019-10-15 03:00:28,161 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:00:28,164 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:00:28,409 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-15 03:00:31,489 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2019-10-15 03:00:31,737 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-10-15 03:00:31,956 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-10-15 03:00:32,229 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-10-15 03:00:32,596 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2019-10-15 03:00:32,598 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:00:32,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 23] total 30 [2019-10-15 03:00:32,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095892618] [2019-10-15 03:00:32,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-15 03:00:32,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:32,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-15 03:00:32,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=775, Unknown=1, NotChecked=0, Total=870 [2019-10-15 03:00:32,604 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 30 states. [2019-10-15 03:00:40,269 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-10-15 03:00:40,525 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2019-10-15 03:00:40,855 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-10-15 03:00:41,250 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2019-10-15 03:00:41,499 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2019-10-15 03:00:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:41,571 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2019-10-15 03:00:41,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 03:00:41,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2019-10-15 03:00:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:41,573 INFO L225 Difference]: With dead ends: 57 [2019-10-15 03:00:41,573 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 03:00:41,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=277, Invalid=2476, Unknown=3, NotChecked=0, Total=2756 [2019-10-15 03:00:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 03:00:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2019-10-15 03:00:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-15 03:00:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-15 03:00:41,586 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 30 [2019-10-15 03:00:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:41,587 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-15 03:00:41,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-15 03:00:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-15 03:00:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 03:00:41,588 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:41,588 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:41,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:41,793 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash 949066391, now seen corresponding path program 2 times [2019-10-15 03:00:41,794 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:41,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487801870] [2019-10-15 03:00:41,794 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:41,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:41,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:00:42,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487801870] [2019-10-15 03:00:42,118 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:00:42,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-15 03:00:42,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221814630] [2019-10-15 03:00:42,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 03:00:42,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:42,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 03:00:42,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:00:42,120 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 11 states. [2019-10-15 03:00:42,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:42,404 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-10-15 03:00:42,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 03:00:42,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-10-15 03:00:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:42,406 INFO L225 Difference]: With dead ends: 38 [2019-10-15 03:00:42,407 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 03:00:42,407 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-15 03:00:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 03:00:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-10-15 03:00:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 03:00:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-15 03:00:42,416 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 37 [2019-10-15 03:00:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:42,417 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-15 03:00:42,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 03:00:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-15 03:00:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 03:00:42,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:42,418 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:42,419 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash 949119494, now seen corresponding path program 1 times [2019-10-15 03:00:42,419 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:42,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634340142] [2019-10-15 03:00:42,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:42,420 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:42,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:00:42,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634340142] [2019-10-15 03:00:42,537 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:00:42,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-15 03:00:42,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874118124] [2019-10-15 03:00:42,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 03:00:42,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:42,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 03:00:42,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:00:42,540 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 9 states. [2019-10-15 03:00:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:42,660 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-10-15 03:00:42,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 03:00:42,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-10-15 03:00:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:42,663 INFO L225 Difference]: With dead ends: 36 [2019-10-15 03:00:42,664 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 03:00:42,666 INFO L600 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 [2019-10-15 03:00:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 03:00:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-15 03:00:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 03:00:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-15 03:00:42,682 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 37 [2019-10-15 03:00:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:42,683 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-15 03:00:42,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 03:00:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-15 03:00:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-15 03:00:42,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:42,684 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:42,685 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:42,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:42,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1519781362, now seen corresponding path program 1 times [2019-10-15 03:00:42,687 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:42,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935751812] [2019-10-15 03:00:42,687 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:42,687 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:42,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:43,540 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-10-15 03:00:44,022 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2019-10-15 03:00:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:00:44,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935751812] [2019-10-15 03:00:44,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100513819] [2019-10-15 03:00:44,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:44,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-15 03:00:44,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:46,374 WARN L191 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 39 [2019-10-15 03:00:47,423 WARN L191 SmtUtils]: Spent 948.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-10-15 03:00:59,955 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2019-10-15 03:01:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:01:02,853 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:03,852 WARN L191 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-10-15 03:01:03,970 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2019-10-15 03:01:04,182 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-10-15 03:01:04,338 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-15 03:01:04,540 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-15 03:01:04,729 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 88