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-ext3-properties/sll_length_check-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:58:32,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:58:32,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:58:32,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 02:58:32,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 02:58:32,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 02:58:32,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 02:58:32,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 02:58:32,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 02:58:32,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 02:58:32,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 02:58:32,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 02:58:32,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 02:58:32,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 02:58:32,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 02:58:32,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 02:58:32,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 02:58:32,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 02:58:32,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 02:58:32,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 02:58:32,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 02:58:32,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 02:58:32,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 02:58:32,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 02:58:32,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 02:58:32,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 02:58:32,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 02:58:32,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 02:58:32,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 02:58:32,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 02:58:32,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 02:58:32,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 02:58:32,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 02:58:32,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 02:58:32,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 02:58:32,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 02:58:32,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 02:58:32,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 02:58:32,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:58:32,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:58:32,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:58:32,823 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 02:58:32,852 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:58:32,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:58:32,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:58:32,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:58:32,854 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:58:32,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:58:32,854 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:58:32,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:58:32,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:58:32,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:58:32,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:58:32,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:58:32,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:58:32,855 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:58:32,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:58:32,856 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:58:32,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:58:32,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:58:32,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:58:32,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:58:32,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:58:32,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:58:32,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:58:32,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:58:32,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:58:32,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:58:32,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:58:32,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:58:32,858 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 02:58:33,175 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:58:33,189 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:58:33,192 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:58:33,194 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:58:33,194 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:58:33,195 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2019-10-15 02:58:33,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d5e1bc9/0593baded5e9456e84516e822b7e268b/FLAGf855b4ac7 [2019-10-15 02:58:33,769 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:58:33,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2019-10-15 02:58:33,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d5e1bc9/0593baded5e9456e84516e822b7e268b/FLAGf855b4ac7 [2019-10-15 02:58:34,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d5e1bc9/0593baded5e9456e84516e822b7e268b [2019-10-15 02:58:34,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:58:34,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:58:34,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:58:34,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:58:34,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:58:34,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:58:34" (1/1) ... [2019-10-15 02:58:34,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6048e641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34, skipping insertion in model container [2019-10-15 02:58:34,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:58:34" (1/1) ... [2019-10-15 02:58:34,143 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:58:34,189 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:58:34,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:58:34,611 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:58:34,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:58:34,724 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:58:34,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34 WrapperNode [2019-10-15 02:58:34,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:58:34,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:58:34,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:58:34,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:58:34,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34" (1/1) ... [2019-10-15 02:58:34,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34" (1/1) ... [2019-10-15 02:58:34,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34" (1/1) ... [2019-10-15 02:58:34,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34" (1/1) ... [2019-10-15 02:58:34,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34" (1/1) ... [2019-10-15 02:58:34,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34" (1/1) ... [2019-10-15 02:58:34,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34" (1/1) ... [2019-10-15 02:58:34,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:58:34,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:58:34,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:58:34,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:58:34,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34" (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 02:58:34,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:58:34,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:58:34,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 02:58:34,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 02:58:34,854 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-15 02:58:34,855 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-15 02:58:34,855 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2019-10-15 02:58:34,855 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-10-15 02:58:34,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:58:34,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:58:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 02:58:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 02:58:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 02:58:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 02:58:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 02:58:34,856 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 02:58:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 02:58:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 02:58:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 02:58:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 02:58:34,857 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 02:58:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 02:58:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 02:58:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 02:58:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 02:58:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 02:58:34,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 02:58:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 02:58:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 02:58:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 02:58:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 02:58:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 02:58:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 02:58:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 02:58:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 02:58:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 02:58:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 02:58:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 02:58:34,860 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 02:58:34,861 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 02:58:34,861 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 02:58:34,861 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 02:58:34,861 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 02:58:34,861 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 02:58:34,861 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 02:58:34,862 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 02:58:34,862 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 02:58:34,862 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 02:58:34,862 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 02:58:34,862 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 02:58:34,862 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 02:58:34,863 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 02:58:34,863 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 02:58:34,863 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 02:58:34,863 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 02:58:34,863 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 02:58:34,863 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 02:58:34,864 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 02:58:34,864 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 02:58:34,864 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 02:58:34,864 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 02:58:34,864 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 02:58:34,864 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 02:58:34,865 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 02:58:34,865 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 02:58:34,865 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 02:58:34,865 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 02:58:34,865 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 02:58:34,865 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 02:58:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 02:58:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 02:58:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 02:58:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 02:58:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 02:58:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 02:58:34,867 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 02:58:34,867 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 02:58:34,867 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 02:58:34,867 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 02:58:34,867 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 02:58:34,867 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 02:58:34,867 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 02:58:34,868 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 02:58:34,868 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 02:58:34,868 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 02:58:34,868 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 02:58:34,868 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 02:58:34,868 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 02:58:34,869 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 02:58:34,869 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 02:58:34,869 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 02:58:34,869 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 02:58:34,869 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 02:58:34,869 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 02:58:34,869 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 02:58:34,870 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 02:58:34,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 02:58:34,870 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 02:58:34,870 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 02:58:34,870 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 02:58:34,870 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 02:58:34,871 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 02:58:34,871 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 02:58:34,871 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 02:58:34,871 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 02:58:34,871 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 02:58:34,871 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 02:58:34,871 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 02:58:34,872 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 02:58:34,872 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 02:58:34,872 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 02:58:34,872 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 02:58:34,872 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 02:58:34,872 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 02:58:34,872 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 02:58:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 02:58:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-15 02:58:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-15 02:58:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 02:58:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 02:58:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2019-10-15 02:58:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 02:58:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-10-15 02:58:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 02:58:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:58:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:58:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:58:35,228 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-15 02:58:35,467 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:58:35,468 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 02:58:35,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:58:35 BoogieIcfgContainer [2019-10-15 02:58:35,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:58:35,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:58:35,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:58:35,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:58:35,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:58:34" (1/3) ... [2019-10-15 02:58:35,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e480a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:58:35, skipping insertion in model container [2019-10-15 02:58:35,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:34" (2/3) ... [2019-10-15 02:58:35,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e480a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:58:35, skipping insertion in model container [2019-10-15 02:58:35,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:58:35" (3/3) ... [2019-10-15 02:58:35,479 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2019-10-15 02:58:35,489 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:58:35,499 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:58:35,511 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:58:35,538 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:58:35,538 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:58:35,538 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:58:35,538 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:58:35,539 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:58:35,539 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:58:35,539 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:58:35,539 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:58:35,559 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-10-15 02:58:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 02:58:35,566 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:35,567 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:35,569 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1240224786, now seen corresponding path program 1 times [2019-10-15 02:58:35,586 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:35,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337384708] [2019-10-15 02:58:35,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:35,587 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:35,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:35,719 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 02:58:35,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337384708] [2019-10-15 02:58:35,721 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:35,722 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 02:58:35,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103423711] [2019-10-15 02:58:35,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 02:58:35,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:35,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 02:58:35,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:58:35,745 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2019-10-15 02:58:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:35,771 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-10-15 02:58:35,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 02:58:35,773 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-10-15 02:58:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:35,783 INFO L225 Difference]: With dead ends: 61 [2019-10-15 02:58:35,783 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 02:58:35,787 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:58:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 02:58:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 02:58:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 02:58:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-15 02:58:35,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2019-10-15 02:58:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:35,828 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-15 02:58:35,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 02:58:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-15 02:58:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 02:58:35,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:35,830 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:35,830 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:35,831 INFO L82 PathProgramCache]: Analyzing trace with hash -768999392, now seen corresponding path program 1 times [2019-10-15 02:58:35,831 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:35,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546679973] [2019-10-15 02:58:35,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:35,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:35,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:35,975 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 02:58:35,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546679973] [2019-10-15 02:58:35,976 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:35,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:58:35,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559924719] [2019-10-15 02:58:35,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:58:35,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:35,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:58:35,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:58:35,979 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2019-10-15 02:58:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:36,042 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2019-10-15 02:58:36,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:58:36,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-15 02:58:36,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:36,043 INFO L225 Difference]: With dead ends: 35 [2019-10-15 02:58:36,044 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 02:58:36,045 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 02:58:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 02:58:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-10-15 02:58:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 02:58:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-15 02:58:36,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2019-10-15 02:58:36,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:36,052 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-15 02:58:36,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:58:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-15 02:58:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 02:58:36,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:36,053 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] [2019-10-15 02:58:36,054 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:36,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1802014617, now seen corresponding path program 1 times [2019-10-15 02:58:36,055 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:36,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852527706] [2019-10-15 02:58:36,055 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:36,055 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:36,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:36,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852527706] [2019-10-15 02:58:36,227 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:36,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-15 02:58:36,227 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564108370] [2019-10-15 02:58:36,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 02:58:36,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:36,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 02:58:36,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-15 02:58:36,229 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2019-10-15 02:58:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:36,361 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-10-15 02:58:36,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 02:58:36,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-10-15 02:58:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:36,366 INFO L225 Difference]: With dead ends: 31 [2019-10-15 02:58:36,366 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 02:58:36,367 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-15 02:58:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 02:58:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-15 02:58:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 02:58:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 02:58:36,379 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2019-10-15 02:58:36,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:36,379 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 02:58:36,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 02:58:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 02:58:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 02:58:36,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:36,381 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 02:58:36,381 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1649529647, now seen corresponding path program 1 times [2019-10-15 02:58:36,382 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:36,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85428388] [2019-10-15 02:58:36,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:36,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:36,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 02:58:36,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85428388] [2019-10-15 02:58:36,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40058029] [2019-10-15 02:58:36,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:36,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 02:58:36,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 02:58:36,625 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:58:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 02:58:36,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787682568] [2019-10-15 02:58:36,816 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 02:58:36,816 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:58:36,829 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:58:36,839 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:58:36,840 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:58:37,070 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2019-10-15 02:58:37,228 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:38,444 INFO L199 IcfgInterpreter]: Interpreting procedure sll_length with input of size 18 for LOIs [2019-10-15 02:58:38,548 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 27 for LOIs [2019-10-15 02:58:38,900 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:38,994 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:58:38,998 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:58:39,552 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2019-10-15 02:58:40,019 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2019-10-15 02:58:40,213 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2019-10-15 02:58:40,666 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:58:40,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 19] total 27 [2019-10-15 02:58:40,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280821324] [2019-10-15 02:58:40,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-15 02:58:40,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:40,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-15 02:58:40,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2019-10-15 02:58:40,673 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 27 states. [2019-10-15 02:58:41,116 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2019-10-15 02:58:41,419 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2019-10-15 02:58:41,720 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2019-10-15 02:58:42,319 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2019-10-15 02:58:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:42,485 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2019-10-15 02:58:42,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 02:58:42,485 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 23 [2019-10-15 02:58:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:42,487 INFO L225 Difference]: With dead ends: 63 [2019-10-15 02:58:42,487 INFO L226 Difference]: Without dead ends: 51 [2019-10-15 02:58:42,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=307, Invalid=2243, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 02:58:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-15 02:58:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2019-10-15 02:58:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 02:58:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-15 02:58:42,497 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2019-10-15 02:58:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:42,497 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-15 02:58:42,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-15 02:58:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-15 02:58:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 02:58:42,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:42,499 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] [2019-10-15 02:58:42,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:42,704 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:42,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1416611830, now seen corresponding path program 2 times [2019-10-15 02:58:42,705 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:42,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955370095] [2019-10-15 02:58:42,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:42,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:42,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:42,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955370095] [2019-10-15 02:58:42,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337589933] [2019-10-15 02:58:42,819 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 02:58:42,942 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 02:58:42,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 02:58:42,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-15 02:58:42,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:43,165 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:58:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:43,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906414458] [2019-10-15 02:58:43,345 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 02:58:43,345 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:58:43,346 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:58:43,346 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:58:43,348 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:58:43,379 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2019-10-15 02:58:43,470 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:44,179 INFO L199 IcfgInterpreter]: Interpreting procedure sll_length with input of size 18 for LOIs [2019-10-15 02:58:44,220 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 27 for LOIs [2019-10-15 02:58:44,485 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:44,534 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:58:44,538 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:58:47,173 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-10-15 02:58:48,203 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:58:48,203 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11, 19] total 41 [2019-10-15 02:58:48,203 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553973678] [2019-10-15 02:58:48,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-15 02:58:48,205 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:48,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-15 02:58:48,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1518, Unknown=1, NotChecked=0, Total=1640 [2019-10-15 02:58:48,207 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 41 states. [2019-10-15 02:58:48,745 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-10-15 02:58:57,594 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2019-10-15 02:58:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:59,267 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2019-10-15 02:58:59,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-15 02:58:59,272 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 26 [2019-10-15 02:58:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:59,274 INFO L225 Difference]: With dead ends: 61 [2019-10-15 02:58:59,274 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 02:58:59,279 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=487, Invalid=4768, Unknown=1, NotChecked=0, Total=5256 [2019-10-15 02:58:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 02:58:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2019-10-15 02:58:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 02:58:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-15 02:58:59,290 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2019-10-15 02:58:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:59,291 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-15 02:58:59,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-15 02:58:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-15 02:58:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 02:58:59,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:59,296 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:59,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:59,500 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:59,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1652265600, now seen corresponding path program 3 times [2019-10-15 02:58:59,501 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:59,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498166143] [2019-10-15 02:58:59,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:59,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:59,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 02:58:59,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498166143] [2019-10-15 02:58:59,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793726388] [2019-10-15 02:58:59,662 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:59,816 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 02:58:59,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 02:58:59,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 02:58:59,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 02:58:59,858 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:58:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 02:58:59,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2104134589] [2019-10-15 02:58:59,921 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 02:58:59,922 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:58:59,922 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:58:59,922 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:58:59,923 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:58:59,948 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2019-10-15 02:59:00,007 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:59:00,533 INFO L199 IcfgInterpreter]: Interpreting procedure sll_length with input of size 18 for LOIs [2019-10-15 02:59:00,568 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 27 for LOIs [2019-10-15 02:59:00,821 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:59:00,866 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:59:00,869 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:59:01,386 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2019-10-15 02:59:02,217 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:59:02,217 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 19] total 28 [2019-10-15 02:59:02,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081269258] [2019-10-15 02:59:02,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 02:59:02,219 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 02:59:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2019-10-15 02:59:02,220 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 28 states. [2019-10-15 02:59:02,670 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2019-10-15 02:59:02,969 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2019-10-15 02:59:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:04,344 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2019-10-15 02:59:04,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 02:59:04,345 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2019-10-15 02:59:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:04,348 INFO L225 Difference]: With dead ends: 59 [2019-10-15 02:59:04,349 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 02:59:04,350 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=305, Invalid=2347, Unknown=0, NotChecked=0, Total=2652 [2019-10-15 02:59:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 02:59:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2019-10-15 02:59:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-15 02:59:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-10-15 02:59:04,375 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2019-10-15 02:59:04,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:04,376 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-10-15 02:59:04,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 02:59:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-10-15 02:59:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 02:59:04,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:04,377 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:04,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:04,581 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:04,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1996781878, now seen corresponding path program 4 times [2019-10-15 02:59:04,581 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:04,582 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629794933] [2019-10-15 02:59:04,582 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:04,582 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:04,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:04,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629794933] [2019-10-15 02:59:04,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495215222] [2019-10-15 02:59:04,852 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:05,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-15 02:59:05,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:59:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:05,836 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:59:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:59:06,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621822534] [2019-10-15 02:59:06,550 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 02:59:06,550 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:59:06,551 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:59:06,551 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:59:06,551 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:59:06,573 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2019-10-15 02:59:06,617 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:59:07,084 INFO L199 IcfgInterpreter]: Interpreting procedure sll_length with input of size 18 for LOIs [2019-10-15 02:59:07,116 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 27 for LOIs [2019-10-15 02:59:07,347 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:59:07,408 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:59:07,411 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:59:08,380 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-10-15 02:59:09,371 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:59:09,372 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 19] total 48 [2019-10-15 02:59:09,372 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717235976] [2019-10-15 02:59:09,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-10-15 02:59:09,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:59:09,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-10-15 02:59:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2110, Unknown=0, NotChecked=0, Total=2256 [2019-10-15 02:59:09,375 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 48 states. [2019-10-15 02:59:09,951 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2019-10-15 02:59:10,764 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2019-10-15 02:59:11,587 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-10-15 02:59:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:59:14,678 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2019-10-15 02:59:14,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-15 02:59:14,678 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 28 [2019-10-15 02:59:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:59:14,680 INFO L225 Difference]: With dead ends: 95 [2019-10-15 02:59:14,680 INFO L226 Difference]: Without dead ends: 80 [2019-10-15 02:59:14,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2826 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=723, Invalid=9579, Unknown=0, NotChecked=0, Total=10302 [2019-10-15 02:59:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-15 02:59:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2019-10-15 02:59:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-15 02:59:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2019-10-15 02:59:14,699 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 28 [2019-10-15 02:59:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:59:14,700 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2019-10-15 02:59:14,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-10-15 02:59:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2019-10-15 02:59:14,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 02:59:14,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:59:14,701 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:59:14,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:59:14,908 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:59:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:59:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1313280081, now seen corresponding path program 1 times [2019-10-15 02:59:14,910 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:59:14,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004915151] [2019-10-15 02:59:14,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:14,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:59:14,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:59:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:59:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 02:59:14,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004915151] [2019-10-15 02:59:14,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934257024] [2019-10-15 02:59:14,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true