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_update_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:00:30,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:00:30,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:00:30,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:00:30,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:00:30,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:00:30,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:00:30,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:00:30,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:00:30,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:00:30,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:00:30,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:00:30,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:00:30,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:00:30,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:00:30,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:00:30,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:00:30,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:00:30,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:00:30,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:00:30,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:00:30,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:00:30,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:00:30,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:00:30,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:00:30,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:00:30,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:00:30,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:00:30,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:00:30,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:00:30,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:00:30,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:00:30,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:00:30,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:00:30,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:00:30,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:00:30,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:00:30,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:00:30,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:00:30,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:00:30,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:00:30,721 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 03:00:30,746 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:00:30,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:00:30,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:00:30,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:00:30,753 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:00:30,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:00:30,754 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:00:30,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:00:30,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:00:30,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:00:30,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:00:30,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:00:30,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:00:30,755 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:00:30,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:00:30,755 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:00:30,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:00:30,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:00:30,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:00:30,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:00:30,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:00:30,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:00:30,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:00:30,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:00:30,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:00:30,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:00:30,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:00:30,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:00:30,758 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 03:00:31,018 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:00:31,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:00:31,038 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:00:31,039 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:00:31,040 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:00:31,040 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_update_all.i [2019-10-15 03:00:31,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eec929aa4/bdc72a8495954d7b9bfd5bb2221ebad4/FLAG02c2db3e5 [2019-10-15 03:00:31,587 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:00:31,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_update_all.i [2019-10-15 03:00:31,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eec929aa4/bdc72a8495954d7b9bfd5bb2221ebad4/FLAG02c2db3e5 [2019-10-15 03:00:31,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eec929aa4/bdc72a8495954d7b9bfd5bb2221ebad4 [2019-10-15 03:00:31,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:00:31,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:00:31,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:31,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:00:31,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:00:31,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:31" (1/1) ... [2019-10-15 03:00:31,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25fb8d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:31, skipping insertion in model container [2019-10-15 03:00:31,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:31" (1/1) ... [2019-10-15 03:00:31,857 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:00:31,900 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:00:32,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:32,340 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:00:32,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:32,439 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:00:32,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:32 WrapperNode [2019-10-15 03:00:32,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:32,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:00:32,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:00:32,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:00:32,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:32" (1/1) ... [2019-10-15 03:00:32,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:32" (1/1) ... [2019-10-15 03:00:32,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:32" (1/1) ... [2019-10-15 03:00:32,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:32" (1/1) ... [2019-10-15 03:00:32,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:32" (1/1) ... [2019-10-15 03:00:32,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:32" (1/1) ... [2019-10-15 03:00:32,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:32" (1/1) ... [2019-10-15 03:00:32,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:00:32,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:00:32,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:00:32,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:00:32,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:32" (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 03:00:32,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:00:32,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:00:32,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 03:00:32,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 03:00:32,561 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-15 03:00:32,561 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-15 03:00:32,561 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-15 03:00:32,561 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-10-15 03:00:32,561 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_get_data_at [2019-10-15 03:00:32,561 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_update_at [2019-10-15 03:00:32,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:00:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:00:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 03:00:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 03:00:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 03:00:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 03:00:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 03:00:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 03:00:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 03:00:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 03:00:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 03:00:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 03:00:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 03:00:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 03:00:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 03:00:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 03:00:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 03:00:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 03:00:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 03:00:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 03:00:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 03:00:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 03:00:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 03:00:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 03:00:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 03:00:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 03:00:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 03:00:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 03:00:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 03:00:32,567 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 03:00:32,567 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 03:00:32,567 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 03:00:32,567 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 03:00:32,567 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 03:00:32,567 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 03:00:32,568 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 03:00:32,568 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 03:00:32,568 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 03:00:32,568 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 03:00:32,568 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 03:00:32,568 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 03:00:32,569 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 03:00:32,569 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 03:00:32,569 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 03:00:32,569 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 03:00:32,569 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 03:00:32,569 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 03:00:32,569 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 03:00:32,570 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 03:00:32,570 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 03:00:32,570 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 03:00:32,570 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 03:00:32,570 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 03:00:32,570 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 03:00:32,571 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:00:32,571 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 03:00:32,571 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 03:00:32,571 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:00:32,571 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 03:00:32,571 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 03:00:32,571 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 03:00:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 03:00:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 03:00:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 03:00:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 03:00:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 03:00:32,572 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 03:00:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:00:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 03:00:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 03:00:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 03:00:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 03:00:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 03:00:32,573 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 03:00:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 03:00:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 03:00:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 03:00:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 03:00:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 03:00:32,574 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 03:00:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 03:00:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 03:00:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 03:00:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 03:00:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 03:00:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 03:00:32,575 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 03:00:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 03:00:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 03:00:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 03:00:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 03:00:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 03:00:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 03:00:32,576 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 03:00:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 03:00:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 03:00:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 03:00:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 03:00:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 03:00:32,577 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 03:00:32,578 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 03:00:32,578 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 03:00:32,578 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 03:00:32,578 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 03:00:32,578 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 03:00:32,578 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 03:00:32,578 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 03:00:32,579 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-15 03:00:32,579 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-15 03:00:32,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:00:32,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:00:32,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:00:32,579 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-15 03:00:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-10-15 03:00:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:00:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:00:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure sll_get_data_at [2019-10-15 03:00:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:00:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure sll_update_at [2019-10-15 03:00:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:00:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:00:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:00:33,016 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-15 03:00:33,272 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:00:33,273 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 03:00:33,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:33 BoogieIcfgContainer [2019-10-15 03:00:33,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:00:33,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:00:33,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:00:33,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:00:33,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:00:31" (1/3) ... [2019-10-15 03:00:33,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c655ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:33, skipping insertion in model container [2019-10-15 03:00:33,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:32" (2/3) ... [2019-10-15 03:00:33,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c655ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:33, skipping insertion in model container [2019-10-15 03:00:33,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:33" (3/3) ... [2019-10-15 03:00:33,283 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_update_all.i [2019-10-15 03:00:33,292 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:00:33,300 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:00:33,312 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:00:33,334 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:00:33,335 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:00:33,335 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:00:33,335 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:00:33,335 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:00:33,335 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:00:33,336 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:00:33,336 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:00:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2019-10-15 03:00:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 03:00:33,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:33,360 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 03:00:33,362 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:33,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash -489949846, now seen corresponding path program 1 times [2019-10-15 03:00:33,376 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:33,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686782223] [2019-10-15 03:00:33,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:33,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:33,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:33,585 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 03:00:33,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686782223] [2019-10-15 03:00:33,587 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:00:33,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:00:33,588 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317810249] [2019-10-15 03:00:33,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:00:33,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:33,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:00:33,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:00:33,611 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 5 states. [2019-10-15 03:00:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:33,724 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2019-10-15 03:00:33,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:00:33,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-15 03:00:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:33,735 INFO L225 Difference]: With dead ends: 72 [2019-10-15 03:00:33,735 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 03:00:33,739 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 03:00:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 03:00:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-15 03:00:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 03:00:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-15 03:00:33,779 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 19 [2019-10-15 03:00:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:33,779 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-15 03:00:33,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:00:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-15 03:00:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 03:00:33,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:33,781 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, 1, 1, 1] [2019-10-15 03:00:33,781 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash -550726152, now seen corresponding path program 1 times [2019-10-15 03:00:33,782 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:33,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048924796] [2019-10-15 03:00:33,783 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:33,783 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:33,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:33,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048924796] [2019-10-15 03:00:33,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136295844] [2019-10-15 03:00:33,902 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 03:00:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:34,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:00:34,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:34,138 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:00:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:34,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958213328] [2019-10-15 03:00:34,321 INFO L162 IcfgInterpreter]: Started Sifa with 26 locations of interest [2019-10-15 03:00:34,321 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:00:34,328 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:00:34,336 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:00:34,336 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:00:34,557 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 03:00:34,683 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:35,467 INFO L199 IcfgInterpreter]: Interpreting procedure sll_get_data_at with input of size 1 for LOIs [2019-10-15 03:00:35,471 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 33 for LOIs [2019-10-15 03:00:36,656 INFO L199 IcfgInterpreter]: Interpreting procedure node_create with input of size 29 for LOIs [2019-10-15 03:00:36,715 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:00:36,718 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:00:37,664 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2019-10-15 03:00:37,885 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:00:37,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 6, 6] total 23 [2019-10-15 03:00:37,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986284890] [2019-10-15 03:00:37,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 03:00:37,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:37,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 03:00:37,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2019-10-15 03:00:37,889 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 17 states. [2019-10-15 03:00:39,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:39,327 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2019-10-15 03:00:39,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 03:00:39,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2019-10-15 03:00:39,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:39,331 INFO L225 Difference]: With dead ends: 45 [2019-10-15 03:00:39,331 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 03:00:39,333 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 03:00:39,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 03:00:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-10-15 03:00:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 03:00:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-15 03:00:39,341 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2019-10-15 03:00:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:39,342 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-15 03:00:39,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 03:00:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-15 03:00:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:00:39,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:39,343 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:39,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:39,552 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:39,552 INFO L82 PathProgramCache]: Analyzing trace with hash 531961720, now seen corresponding path program 1 times [2019-10-15 03:00:39,552 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:39,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546683261] [2019-10-15 03:00:39,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:39,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:39,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:39,643 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 03:00:39,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546683261] [2019-10-15 03:00:39,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035674503] [2019-10-15 03:00:39,647 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 03:00:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:39,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:00:39,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:39,782 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 03:00:39,783 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:00:39,862 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 03:00:39,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762236671] [2019-10-15 03:00:39,864 INFO L162 IcfgInterpreter]: Started Sifa with 31 locations of interest [2019-10-15 03:00:39,864 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:00:39,865 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:00:39,865 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:00:39,865 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:00:39,896 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 03:00:39,954 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:40,417 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:40,431 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:40,487 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:40,511 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:40,684 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:40,698 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:40,766 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:40,790 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:40,970 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:40,983 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,034 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,058 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,187 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,199 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,251 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,274 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,406 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,422 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,492 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,526 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,704 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,722 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,765 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,784 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,904 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,917 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,964 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:41,988 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:42,082 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:42,094 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:42,141 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:42,159 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:42,765 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:42,778 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:42,885 INFO L199 IcfgInterpreter]: Interpreting procedure sll_get_data_at with input of size 1 for LOIs [2019-10-15 03:00:42,888 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 33 for LOIs [2019-10-15 03:00:43,707 INFO L199 IcfgInterpreter]: Interpreting procedure node_create with input of size 29 for LOIs [2019-10-15 03:00:43,746 INFO L199 IcfgInterpreter]: Interpreting procedure sll_update_at with input of size 28 for LOIs [2019-10-15 03:00:43,760 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:00:43,763 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:00:44,366 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2019-10-15 03:00:44,950 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2019-10-15 03:00:45,621 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:00:45,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [6, 6, 6] total 28 [2019-10-15 03:00:45,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019728459] [2019-10-15 03:00:45,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:00:45,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:00:45,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2019-10-15 03:00:45,623 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 22 states. [2019-10-15 03:00:46,138 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2019-10-15 03:00:46,607 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2019-10-15 03:00:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:47,834 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2019-10-15 03:00:47,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 03:00:47,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 03:00:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:47,837 INFO L225 Difference]: With dead ends: 66 [2019-10-15 03:00:47,837 INFO L226 Difference]: Without dead ends: 57 [2019-10-15 03:00:47,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2019-10-15 03:00:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-15 03:00:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2019-10-15 03:00:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-15 03:00:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2019-10-15 03:00:47,850 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 32 [2019-10-15 03:00:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:47,850 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2019-10-15 03:00:47,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:00:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2019-10-15 03:00:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 03:00:47,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:47,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:48,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:48,067 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:48,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:48,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1305805873, now seen corresponding path program 1 times [2019-10-15 03:00:48,070 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:48,070 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138527077] [2019-10-15 03:00:48,070 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:48,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:48,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:00:48,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138527077] [2019-10-15 03:00:48,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808203918] [2019-10-15 03:00:48,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 03:00:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:48,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:00:48,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:00:48,367 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:00:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:00:48,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10763486] [2019-10-15 03:00:48,453 INFO L162 IcfgInterpreter]: Started Sifa with 31 locations of interest [2019-10-15 03:00:48,453 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:00:48,454 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:00:48,454 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:00:48,454 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:00:48,481 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 03:00:48,542 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:52,017 INFO L199 IcfgInterpreter]: Interpreting procedure sll_get_data_at with input of size 15 for LOIs [2019-10-15 03:00:52,028 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 33 for LOIs [2019-10-15 03:00:52,723 INFO L199 IcfgInterpreter]: Interpreting procedure node_create with input of size 29 for LOIs [2019-10-15 03:00:52,770 INFO L199 IcfgInterpreter]: Interpreting procedure sll_update_at with input of size 46 for LOIs [2019-10-15 03:00:52,947 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:00:52,949 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:00:53,117 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2019-10-15 03:00:53,975 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-10-15 03:00:55,301 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:00:55,301 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 26] total 37 [2019-10-15 03:00:55,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470139464] [2019-10-15 03:00:55,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-15 03:00:55,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-15 03:00:55,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 03:00:55,304 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 38 states. [2019-10-15 03:00:57,082 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2019-10-15 03:00:57,235 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2019-10-15 03:00:57,411 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2019-10-15 03:00:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:58,551 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2019-10-15 03:00:58,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-15 03:00:58,555 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 33 [2019-10-15 03:00:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:58,556 INFO L225 Difference]: With dead ends: 97 [2019-10-15 03:00:58,556 INFO L226 Difference]: Without dead ends: 71 [2019-10-15 03:00:58,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=420, Invalid=4136, Unknown=0, NotChecked=0, Total=4556 [2019-10-15 03:00:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-15 03:00:58,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2019-10-15 03:00:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-15 03:00:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-10-15 03:00:58,571 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 33 [2019-10-15 03:00:58,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:58,572 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-10-15 03:00:58,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-15 03:00:58,572 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-10-15 03:00:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 03:00:58,573 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:58,573 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:58,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:58,777 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash -282550209, now seen corresponding path program 2 times [2019-10-15 03:00:58,779 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:58,779 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872696642] [2019-10-15 03:00:58,779 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:58,779 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:58,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:59,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872696642] [2019-10-15 03:00:59,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094870673] [2019-10-15 03:00:59,795 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 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 03:01:00,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:01:00,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:00,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 102 conjunts are in the unsatisfiable core [2019-10-15 03:01:00,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:01,002 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_update_at_~head.offset Int) (sll_update_at_~data Int)) (= (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_update_at_#in~head.base|) (+ |c_sll_update_at_#in~head.offset| 4)))) (store |c_old(#memory_int)| .cse0 (store (select |c_old(#memory_int)| .cse0) sll_update_at_~head.offset sll_update_at_~data))) |c_#memory_int|)) is different from true [2019-10-15 03:01:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-10-15 03:01:01,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:02,530 WARN L191 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-10-15 03:01:02,746 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 03:01:05,455 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 03:01:09,951 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9