/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/sll2n_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:57:59,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:57:59,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:57:59,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:57:59,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:57:59,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:57:59,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:57:59,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:57:59,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:57:59,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:57:59,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:57:59,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:57:59,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:57:59,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:57:59,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:57:59,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:57:59,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:57:59,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:57:59,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:57:59,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:57:59,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:57:59,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:57:59,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:57:59,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:57:59,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 03:57:59,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 03:57:59,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 03:57:59,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 03:57:59,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 03:57:59,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 03:57:59,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 03:57:59,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 03:57:59,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 03:57:59,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 03:57:59,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 03:57:59,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 03:57:59,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 03:57:59,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 03:57:59,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:57:59,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:57:59,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:57:59,742 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 03:57:59,761 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:57:59,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:57:59,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:57:59,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:57:59,763 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:57:59,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:57:59,764 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:57:59,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:57:59,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:57:59,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:57:59,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:57:59,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:57:59,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:57:59,765 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:57:59,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:57:59,766 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:57:59,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:57:59,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:57:59,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:57:59,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:57:59,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:57:59,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:57:59,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:57:59,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:57:59,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:57:59,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:57:59,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:57:59,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:57:59,768 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 03:58:00,052 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:58:00,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:58:00,076 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:58:00,077 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:58:00,078 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:58:00,078 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_remove_all_reverse.i [2019-11-07 03:58:00,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99c50a12/95bf467b1bd744468bda5cc7b1f34a14/FLAGdae83ded1 [2019-11-07 03:58:00,698 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:58:00,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_remove_all_reverse.i [2019-11-07 03:58:00,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99c50a12/95bf467b1bd744468bda5cc7b1f34a14/FLAGdae83ded1 [2019-11-07 03:58:00,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99c50a12/95bf467b1bd744468bda5cc7b1f34a14 [2019-11-07 03:58:00,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:58:00,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:58:00,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:58:00,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:58:00,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:58:00,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:58:00" (1/1) ... [2019-11-07 03:58:00,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c7b8d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:00, skipping insertion in model container [2019-11-07 03:58:00,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:58:00" (1/1) ... [2019-11-07 03:58:00,969 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:58:01,027 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:58:01,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:58:01,454 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:58:01,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:58:01,583 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:58:01,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:01 WrapperNode [2019-11-07 03:58:01,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:58:01,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:58:01,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:58:01,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:58:01,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:01" (1/1) ... [2019-11-07 03:58:01,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:01" (1/1) ... [2019-11-07 03:58:01,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:01" (1/1) ... [2019-11-07 03:58:01,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:01" (1/1) ... [2019-11-07 03:58:01,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:01" (1/1) ... [2019-11-07 03:58:01,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:01" (1/1) ... [2019-11-07 03:58:01,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:01" (1/1) ... [2019-11-07 03:58:01,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:58:01,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:58:01,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:58:01,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:58:01,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:01" (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 03:58:01,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:58:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:58:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-07 03:58:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-07 03:58:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-07 03:58:01,735 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-07 03:58:01,735 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-11-07 03:58:01,735 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_last [2019-11-07 03:58:01,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:58:01,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:58:01,736 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-07 03:58:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-07 03:58:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-07 03:58:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-07 03:58:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-07 03:58:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-07 03:58:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-07 03:58:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-07 03:58:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-07 03:58:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-07 03:58:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-07 03:58:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-07 03:58:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-07 03:58:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-07 03:58:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-07 03:58:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-07 03:58:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-07 03:58:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-07 03:58:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-07 03:58:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-07 03:58:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-07 03:58:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-07 03:58:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-07 03:58:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-07 03:58:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-07 03:58:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-07 03:58:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-07 03:58:01,740 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-07 03:58:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-07 03:58:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-07 03:58:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-07 03:58:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-07 03:58:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-07 03:58:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-07 03:58:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-07 03:58:01,741 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-07 03:58:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-07 03:58:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-07 03:58:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-07 03:58:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-07 03:58:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-07 03:58:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-07 03:58:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-07 03:58:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-07 03:58:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-07 03:58:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-07 03:58:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-07 03:58:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-07 03:58:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-07 03:58:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-07 03:58:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-07 03:58:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-07 03:58:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 03:58:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 03:58:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-07 03:58:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 03:58:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-07 03:58:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-07 03:58:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-07 03:58:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-07 03:58:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-07 03:58:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-07 03:58:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-07 03:58:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-07 03:58:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-07 03:58:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 03:58:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-07 03:58:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-07 03:58:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-07 03:58:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-07 03:58:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-07 03:58:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-07 03:58:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-07 03:58:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-07 03:58:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-07 03:58:01,747 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-07 03:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-07 03:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-07 03:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-07 03:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-07 03:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-07 03:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-07 03:58:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-07 03:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-07 03:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-07 03:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-07 03:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-07 03:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-07 03:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-07 03:58:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-07 03:58:01,750 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-07 03:58:01,750 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-07 03:58:01,750 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-07 03:58:01,750 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-07 03:58:01,750 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-07 03:58:01,750 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-07 03:58:01,750 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-07 03:58:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-07 03:58:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-07 03:58:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-07 03:58:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-07 03:58:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-07 03:58:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-07 03:58:01,751 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-07 03:58:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-07 03:58:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-07 03:58:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-07 03:58:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 03:58:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 03:58:01,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:58:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-11-07 03:58:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_last [2019-11-07 03:58:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 03:58:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:58:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:58:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 03:58:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-07 03:58:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:58:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:58:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:58:02,066 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-07 03:58:02,350 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:58:02,350 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 03:58:02,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:58:02 BoogieIcfgContainer [2019-11-07 03:58:02,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:58:02,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:58:02,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:58:02,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:58:02,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:58:00" (1/3) ... [2019-11-07 03:58:02,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8099ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:58:02, skipping insertion in model container [2019-11-07 03:58:02,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:01" (2/3) ... [2019-11-07 03:58:02,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8099ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:58:02, skipping insertion in model container [2019-11-07 03:58:02,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:58:02" (3/3) ... [2019-11-07 03:58:02,360 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2019-11-07 03:58:02,371 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:58:02,380 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:58:02,392 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:58:02,417 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:58:02,417 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:58:02,417 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:58:02,418 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:58:02,418 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:58:02,418 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:58:02,418 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:58:02,418 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:58:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-07 03:58:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 03:58:02,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:02,445 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:02,447 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:02,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:02,453 INFO L82 PathProgramCache]: Analyzing trace with hash 417917631, now seen corresponding path program 1 times [2019-11-07 03:58:02,462 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:02,463 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938187140] [2019-11-07 03:58:02,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:02,677 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 03:58:02,679 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938187140] [2019-11-07 03:58:02,681 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:58:02,681 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 03:58:02,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610753313] [2019-11-07 03:58:02,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 03:58:02,691 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:02,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 03:58:02,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 03:58:02,712 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2019-11-07 03:58:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:02,802 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2019-11-07 03:58:02,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 03:58:02,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 03:58:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:02,819 INFO L225 Difference]: With dead ends: 56 [2019-11-07 03:58:02,819 INFO L226 Difference]: Without dead ends: 32 [2019-11-07 03:58:02,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:58:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-07 03:58:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-07 03:58:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-07 03:58:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-11-07 03:58:02,911 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2019-11-07 03:58:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:02,912 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-11-07 03:58:02,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 03:58:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-11-07 03:58:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 03:58:02,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:02,915 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] [2019-11-07 03:58:02,915 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:02,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:02,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1031473072, now seen corresponding path program 1 times [2019-11-07 03:58:02,916 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:02,916 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427119647] [2019-11-07 03:58:02,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:03,087 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427119647] [2019-11-07 03:58:03,087 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548530178] [2019-11-07 03:58:03,087 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 03:58:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:03,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 03:58:03,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:58:03,255 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:58:03,350 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 03:58:03,350 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 10 [2019-11-07 03:58:03,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554367097] [2019-11-07 03:58:03,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 03:58:03,354 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 03:58:03,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 03:58:03,354 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 7 states. [2019-11-07 03:58:03,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:03,423 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2019-11-07 03:58:03,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 03:58:03,424 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-07 03:58:03,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:03,425 INFO L225 Difference]: With dead ends: 49 [2019-11-07 03:58:03,425 INFO L226 Difference]: Without dead ends: 33 [2019-11-07 03:58:03,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 03:58:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-07 03:58:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-11-07 03:58:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-07 03:58:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-07 03:58:03,434 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 20 [2019-11-07 03:58:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:03,434 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-07 03:58:03,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 03:58:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-07 03:58:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-07 03:58:03,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:03,436 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, 1, 1] [2019-11-07 03:58:03,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:58:03,646 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:03,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:03,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1617292443, now seen corresponding path program 1 times [2019-11-07 03:58:03,647 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:03,648 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468900159] [2019-11-07 03:58:03,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:03,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468900159] [2019-11-07 03:58:03,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977187096] [2019-11-07 03:58:03,814 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 [2019-11-07 03:58:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:03,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 03:58:03,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:58:03,963 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:58:04,070 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231240567] [2019-11-07 03:58:04,108 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2019-11-07 03:58:04,109 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:58:04,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:58:04,128 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:58:04,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:58:04,293 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 03:58:04,450 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:58:05,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:58:05,367 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:178) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:83) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:146) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:294) ... 21 more [2019-11-07 03:58:05,373 INFO L168 Benchmark]: Toolchain (without parser) took 4419.91 ms. Allocated memory was 138.9 MB in the beginning and 249.0 MB in the end (delta: 110.1 MB). Free memory was 102.8 MB in the beginning and 93.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 119.0 MB. Max. memory is 7.1 GB. [2019-11-07 03:58:05,373 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-11-07 03:58:05,374 INFO L168 Benchmark]: CACSL2BoogieTranslator took 630.81 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 102.8 MB in the beginning and 169.7 MB in the end (delta: -66.9 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2019-11-07 03:58:05,374 INFO L168 Benchmark]: Boogie Preprocessor took 89.09 ms. Allocated memory is still 203.9 MB. Free memory was 169.7 MB in the beginning and 166.2 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2019-11-07 03:58:05,374 INFO L168 Benchmark]: RCFGBuilder took 677.91 ms. Allocated memory is still 203.9 MB. Free memory was 166.2 MB in the beginning and 116.1 MB in the end (delta: 50.1 MB). Peak memory consumption was 50.1 MB. Max. memory is 7.1 GB. [2019-11-07 03:58:05,375 INFO L168 Benchmark]: TraceAbstraction took 3017.99 ms. Allocated memory was 203.9 MB in the beginning and 249.0 MB in the end (delta: 45.1 MB). Free memory was 115.2 MB in the beginning and 95.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2019-11-07 03:58:05,377 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 630.81 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 102.8 MB in the beginning and 169.7 MB in the end (delta: -66.9 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 89.09 ms. Allocated memory is still 203.9 MB. Free memory was 169.7 MB in the beginning and 166.2 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 677.91 ms. Allocated memory is still 203.9 MB. Free memory was 166.2 MB in the beginning and 116.1 MB in the end (delta: 50.1 MB). Peak memory consumption was 50.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3017.99 ms. Allocated memory was 203.9 MB in the beginning and 249.0 MB in the end (delta: 45.1 MB). Free memory was 115.2 MB in the beginning and 95.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:302) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...