/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/list-simple/dll2n_append_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:56:17,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:56:17,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:56:17,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:56:17,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:56:17,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:56:17,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:56:17,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:56:17,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:56:17,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:56:17,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:56:17,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:56:17,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:56:17,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:56:17,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:56:17,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:56:17,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:56:17,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:56:17,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:56:17,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:56:17,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:56:17,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:56:17,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:56:17,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:56:17,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 03:56:17,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 03:56:17,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 03:56:17,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 03:56:17,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 03:56:17,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 03:56:17,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 03:56:17,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 03:56:17,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 03:56:17,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 03:56:17,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 03:56:17,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 03:56:17,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 03:56:17,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 03:56:17,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:56:17,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:56:17,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:56:17,588 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 [2019-11-07 03:56:17,621 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:56:17,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:56:17,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:56:17,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:56:17,626 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:56:17,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:56:17,627 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:56:17,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:56:17,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:56:17,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:56:17,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:56:17,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:56:17,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:56:17,630 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:56:17,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:56:17,631 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:56:17,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:56:17,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:56:17,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:56:17,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:56:17,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:56:17,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:56:17,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:56:17,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:56:17,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:56:17,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:56:17,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:56:17,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:56:17,634 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 [2019-11-07 03:56:17,923 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:56:17,938 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:56:17,942 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:56:17,943 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:56:17,944 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:56:17,944 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_append_equal.i [2019-11-07 03:56:18,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/696599625/43b11c2ab22e4b4cba61a834f0b3d70f/FLAGe4fb21525 [2019-11-07 03:56:18,548 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:56:18,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_append_equal.i [2019-11-07 03:56:18,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/696599625/43b11c2ab22e4b4cba61a834f0b3d70f/FLAGe4fb21525 [2019-11-07 03:56:18,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/696599625/43b11c2ab22e4b4cba61a834f0b3d70f [2019-11-07 03:56:18,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:56:18,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:56:18,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:56:18,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:56:18,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:56:18,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:56:18" (1/1) ... [2019-11-07 03:56:18,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245610d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:18, skipping insertion in model container [2019-11-07 03:56:18,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:56:18" (1/1) ... [2019-11-07 03:56:18,891 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:56:18,981 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:56:19,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:56:19,444 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:56:19,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:56:19,552 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:56:19,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:19 WrapperNode [2019-11-07 03:56:19,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:56:19,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:56:19,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:56:19,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:56:19,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:19" (1/1) ... [2019-11-07 03:56:19,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:19" (1/1) ... [2019-11-07 03:56:19,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:19" (1/1) ... [2019-11-07 03:56:19,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:19" (1/1) ... [2019-11-07 03:56:19,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:19" (1/1) ... [2019-11-07 03:56:19,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:19" (1/1) ... [2019-11-07 03:56:19,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:19" (1/1) ... [2019-11-07 03:56:19,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:56:19,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:56:19,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:56:19,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:56:19,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:19" (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 [2019-11-07 03:56:19,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:56:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:56:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-07 03:56:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-07 03:56:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-07 03:56:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-07 03:56:19,701 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-11-07 03:56:19,701 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2019-11-07 03:56:19,701 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_append [2019-11-07 03:56:19,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:56:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:56:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-07 03:56:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-07 03:56:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-07 03:56:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-07 03:56:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-07 03:56:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-07 03:56:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-07 03:56:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-07 03:56:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-07 03:56:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-07 03:56:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-07 03:56:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-07 03:56:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-07 03:56:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-07 03:56:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-07 03:56:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-07 03:56:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-07 03:56:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-07 03:56:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-07 03:56:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-07 03:56:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-07 03:56:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-07 03:56:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-07 03:56:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-07 03:56:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-07 03:56:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-07 03:56:19,706 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-07 03:56:19,706 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-07 03:56:19,706 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-07 03:56:19,706 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-07 03:56:19,706 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-07 03:56:19,706 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-07 03:56:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-07 03:56:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-07 03:56:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-07 03:56:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-07 03:56:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-07 03:56:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-07 03:56:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-07 03:56:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-07 03:56:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-07 03:56:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-07 03:56:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-07 03:56:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-07 03:56:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-07 03:56:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-07 03:56:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-07 03:56:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-07 03:56:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-07 03:56:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-07 03:56:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-07 03:56:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-07 03:56:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 03:56:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 03:56:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-07 03:56:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 03:56:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-07 03:56:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-07 03:56:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-07 03:56:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-07 03:56:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-07 03:56:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-07 03:56:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-07 03:56:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-07 03:56:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-07 03:56:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 03:56:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-07 03:56:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-07 03:56:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-07 03:56:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-07 03:56:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-07 03:56:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-07 03:56:19,712 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-07 03:56:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-07 03:56:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-07 03:56:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-07 03:56:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-07 03:56:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-07 03:56:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-07 03:56:19,713 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-07 03:56:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-07 03:56:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-07 03:56:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-07 03:56:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-07 03:56:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-07 03:56:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-07 03:56:19,714 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-07 03:56:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-07 03:56:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-07 03:56:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-07 03:56:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-07 03:56:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-07 03:56:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-07 03:56:19,715 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-07 03:56:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-07 03:56:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-07 03:56:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-07 03:56:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-07 03:56:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-07 03:56:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-07 03:56:19,716 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-07 03:56:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-07 03:56:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-07 03:56:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-07 03:56:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-07 03:56:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-07 03:56:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-07 03:56:19,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 03:56:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 03:56:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:56:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-11-07 03:56:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2019-11-07 03:56:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 03:56:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:56:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure dll_append [2019-11-07 03:56:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:56:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 03:56:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-07 03:56:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:56:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:56:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:56:20,136 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-07 03:56:20,503 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:56:20,503 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 03:56:20,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:56:20 BoogieIcfgContainer [2019-11-07 03:56:20,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:56:20,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:56:20,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:56:20,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:56:20,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:56:18" (1/3) ... [2019-11-07 03:56:20,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0d7bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:56:20, skipping insertion in model container [2019-11-07 03:56:20,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:19" (2/3) ... [2019-11-07 03:56:20,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0d7bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:56:20, skipping insertion in model container [2019-11-07 03:56:20,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:56:20" (3/3) ... [2019-11-07 03:56:20,515 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2019-11-07 03:56:20,525 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:56:20,533 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:56:20,546 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:56:20,570 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:56:20,570 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:56:20,570 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:56:20,571 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:56:20,571 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:56:20,571 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:56:20,571 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:56:20,572 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:56:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2019-11-07 03:56:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 03:56:20,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:56:20,599 INFO L410 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] [2019-11-07 03:56:20,601 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:56:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:56:20,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1149827137, now seen corresponding path program 1 times [2019-11-07 03:56:20,617 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:56:20,618 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751541407] [2019-11-07 03:56:20,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:56:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:56:20,888 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751541407] [2019-11-07 03:56:20,889 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:56:20,890 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 03:56:20,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913173384] [2019-11-07 03:56:20,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:56:20,915 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:56:20,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:56:20,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:56:20,933 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 5 states. [2019-11-07 03:56:21,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:56:21,028 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2019-11-07 03:56:21,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:56:21,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-11-07 03:56:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:56:21,046 INFO L225 Difference]: With dead ends: 81 [2019-11-07 03:56:21,046 INFO L226 Difference]: Without dead ends: 35 [2019-11-07 03:56:21,052 INFO L630 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 [2019-11-07 03:56:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-07 03:56:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-07 03:56:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 03:56:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-07 03:56:21,114 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2019-11-07 03:56:21,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:56:21,115 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-07 03:56:21,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:56:21,115 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-07 03:56:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 03:56:21,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:56:21,118 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:56:21,118 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:56:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:56:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash 48574861, now seen corresponding path program 1 times [2019-11-07 03:56:21,119 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:56:21,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556165322] [2019-11-07 03:56:21,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:56:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 03:56:21,307 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556165322] [2019-11-07 03:56:21,308 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612090123] [2019-11-07 03:56:21,308 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 [2019-11-07 03:56:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:21,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 03:56:21,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:56:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:56:21,494 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:56:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 03:56:21,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1324762019] [2019-11-07 03:56:21,656 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2019-11-07 03:56:21,656 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:56:21,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:56:21,669 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:56:21,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:56:21,814 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 03:56:22,020 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:22,608 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:23,655 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-11-07 03:56:23,713 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-11-07 03:56:23,866 INFO L197 IcfgInterpreter]: Interpreting procedure dll_append with input of size 41 for LOIs [2019-11-07 03:56:24,277 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 44 for LOIs [2019-11-07 03:56:28,991 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-11-07 03:56:30,079 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 40 for LOIs [2019-11-07 03:56:30,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:56:30,166 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:56:33,523 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2019-11-07 03:56:33,840 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2019-11-07 03:56:34,143 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2019-11-07 03:56:34,542 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2019-11-07 03:56:34,992 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:56:34,993 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 24] total 31 [2019-11-07 03:56:34,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647801264] [2019-11-07 03:56:34,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-07 03:56:34,995 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:56:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-07 03:56:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=833, Unknown=1, NotChecked=0, Total=930 [2019-11-07 03:56:34,997 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 31 states. [2019-11-07 03:56:42,976 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-11-07 03:56:43,292 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-11-07 03:56:43,695 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2019-11-07 03:56:43,907 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2019-11-07 03:56:44,526 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2019-11-07 03:56:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:56:45,056 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2019-11-07 03:56:45,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-07 03:56:45,057 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 32 [2019-11-07 03:56:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:56:45,059 INFO L225 Difference]: With dead ends: 79 [2019-11-07 03:56:45,059 INFO L226 Difference]: Without dead ends: 57 [2019-11-07 03:56:45,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=324, Invalid=3095, Unknown=3, NotChecked=0, Total=3422 [2019-11-07 03:56:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-07 03:56:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-11-07 03:56:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-07 03:56:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-11-07 03:56:45,071 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 32 [2019-11-07 03:56:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:56:45,072 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-11-07 03:56:45,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-07 03:56:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-11-07 03:56:45,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-07 03:56:45,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:56:45,073 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:56:45,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:56:45,278 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:56:45,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:56:45,279 INFO L82 PathProgramCache]: Analyzing trace with hash -887553025, now seen corresponding path program 2 times [2019-11-07 03:56:45,280 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:56:45,280 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945690389] [2019-11-07 03:56:45,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:56:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 03:56:45,662 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945690389] [2019-11-07 03:56:45,662 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925834223] [2019-11-07 03:56:45,662 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 [2019-11-07 03:56:45,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-11-07 03:56:45,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:56:45,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-07 03:56:45,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:56:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 03:56:46,252 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:56:51,029 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 34