java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/list-simple/sll2n_update_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:00:34,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:00:34,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:00:35,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:00:35,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:00:35,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:00:35,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:00:35,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:00:35,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:00:35,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:00:35,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:00:35,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:00:35,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:00:35,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:00:35,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:00:35,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:00:35,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:00:35,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:00:35,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:00:35,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:00:35,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:00:35,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:00:35,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:00:35,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:00:35,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:00:35,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:00:35,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:00:35,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:00:35,064 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:00:35,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:00:35,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:00:35,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:00:35,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:00:35,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:00:35,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:00:35,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:00:35,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:00:35,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:00:35,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:00:35,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:00:35,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:00:35,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:00:35,093 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:00:35,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:00:35,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:00:35,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:00:35,097 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:00:35,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:00:35,097 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:00:35,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:00:35,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:00:35,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:00:35,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:00:35,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:00:35,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:00:35,100 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:00:35,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:00:35,100 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:00:35,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:00:35,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:00:35,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:00:35,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:00:35,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:00:35,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:00:35,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:00:35,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:00:35,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:00:35,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:00:35,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:00:35,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:00:35,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:00:35,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:00:35,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:00:35,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:00:35,387 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:00:35,387 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:00:35,388 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_update_all_reverse.i [2019-10-15 03:00:35,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6f8ba053/2d14611957294985982a02eb11815f32/FLAG7a01a73d7 [2019-10-15 03:00:36,011 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:00:36,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_update_all_reverse.i [2019-10-15 03:00:36,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6f8ba053/2d14611957294985982a02eb11815f32/FLAG7a01a73d7 [2019-10-15 03:00:36,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6f8ba053/2d14611957294985982a02eb11815f32 [2019-10-15 03:00:36,304 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:00:36,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:00:36,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:36,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:00:36,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:00:36,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:36" (1/1) ... [2019-10-15 03:00:36,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552fc2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36, skipping insertion in model container [2019-10-15 03:00:36,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:36" (1/1) ... [2019-10-15 03:00:36,320 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:00:36,378 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:00:36,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:36,826 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:00:36,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:36,952 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:00:36,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36 WrapperNode [2019-10-15 03:00:36,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:36,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:00:36,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:00:36,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:00:36,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36" (1/1) ... [2019-10-15 03:00:36,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36" (1/1) ... [2019-10-15 03:00:36,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36" (1/1) ... [2019-10-15 03:00:36,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36" (1/1) ... [2019-10-15 03:00:37,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36" (1/1) ... [2019-10-15 03:00:37,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36" (1/1) ... [2019-10-15 03:00:37,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36" (1/1) ... [2019-10-15 03:00:37,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:00:37,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:00:37,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:00:37,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:00:37,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:00:37,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:00:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:00:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 03:00:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 03:00:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-15 03:00:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-15 03:00:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-15 03:00:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-10-15 03:00:37,089 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_get_data_at [2019-10-15 03:00:37,089 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_update_at [2019-10-15 03:00:37,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:00:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:00:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 03:00:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 03:00:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 03:00:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 03:00:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 03:00:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 03:00:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 03:00:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 03:00:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 03:00:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 03:00:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 03:00:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 03:00:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 03:00:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 03:00:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 03:00:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 03:00:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 03:00:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 03:00:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 03:00:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 03:00:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 03:00:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 03:00:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 03:00:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 03:00:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 03:00:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 03:00:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 03:00:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 03:00:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 03:00:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 03:00:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 03:00:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 03:00:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 03:00:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 03:00:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 03:00:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 03:00:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 03:00:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 03:00:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 03:00:37,096 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 03:00:37,096 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 03:00:37,096 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 03:00:37,096 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 03:00:37,096 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 03:00:37,096 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 03:00:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 03:00:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 03:00:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 03:00:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 03:00:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 03:00:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 03:00:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 03:00:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:00:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 03:00:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 03:00:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:00:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 03:00:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 03:00:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 03:00:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 03:00:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 03:00:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 03:00:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 03:00:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 03:00:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 03:00:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:00:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 03:00:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 03:00:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 03:00:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 03:00:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 03:00:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 03:00:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 03:00:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 03:00:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 03:00:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 03:00:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 03:00:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 03:00:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 03:00:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 03:00:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 03:00:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 03:00:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 03:00:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 03:00:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 03:00:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 03:00:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 03:00:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 03:00:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 03:00:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 03:00:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 03:00:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 03:00:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 03:00:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 03:00:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 03:00:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 03:00:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 03:00:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 03:00:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 03:00:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 03:00:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 03:00:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 03:00:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 03:00:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 03:00:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 03:00:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-15 03:00:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-15 03:00:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:00:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:00:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:00:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-15 03:00:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-10-15 03:00:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:00:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:00:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure sll_get_data_at [2019-10-15 03:00:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:00:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure sll_update_at [2019-10-15 03:00:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:00:37,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:00:37,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:00:37,557 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-15 03:00:37,778 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:00:37,778 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 03:00:37,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:37 BoogieIcfgContainer [2019-10-15 03:00:37,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:00:37,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:00:37,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:00:37,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:00:37,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:00:36" (1/3) ... [2019-10-15 03:00:37,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5904439e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:37, skipping insertion in model container [2019-10-15 03:00:37,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:36" (2/3) ... [2019-10-15 03:00:37,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5904439e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:37, skipping insertion in model container [2019-10-15 03:00:37,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:37" (3/3) ... [2019-10-15 03:00:37,788 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2019-10-15 03:00:37,799 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:00:37,808 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:00:37,817 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:00:37,840 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:00:37,841 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:00:37,841 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:00:37,841 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:00:37,841 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:00:37,841 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:00:37,842 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:00:37,842 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:00:37,861 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2019-10-15 03:00:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 03:00:37,868 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:37,869 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:37,871 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:37,878 INFO L82 PathProgramCache]: Analyzing trace with hash -489949846, now seen corresponding path program 1 times [2019-10-15 03:00:37,887 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:37,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146341727] [2019-10-15 03:00:37,888 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:37,888 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:37,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:38,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146341727] [2019-10-15 03:00:38,113 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:00:38,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:00:38,114 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620153660] [2019-10-15 03:00:38,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:00:38,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:38,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:00:38,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:00:38,142 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2019-10-15 03:00:38,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:38,262 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2019-10-15 03:00:38,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:00:38,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-15 03:00:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:38,277 INFO L225 Difference]: With dead ends: 70 [2019-10-15 03:00:38,277 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 03:00:38,283 INFO L600 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 [2019-10-15 03:00:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 03:00:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2019-10-15 03:00:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 03:00:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-15 03:00:38,343 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 19 [2019-10-15 03:00:38,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:38,344 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-15 03:00:38,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:00:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-15 03:00:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:00:38,347 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:38,347 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:38,347 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:38,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:38,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1365796502, now seen corresponding path program 1 times [2019-10-15 03:00:38,349 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:38,349 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17615053] [2019-10-15 03:00:38,349 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:38,349 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:38,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:38,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17615053] [2019-10-15 03:00:38,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298689779] [2019-10-15 03:00:38,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:38,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:00:38,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:00:38,830 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:00:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:00:38,928 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:00:38,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [13] total 15 [2019-10-15 03:00:38,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204836103] [2019-10-15 03:00:38,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:00:38,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:38,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:00:38,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 03:00:38,932 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states. [2019-10-15 03:00:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:39,020 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2019-10-15 03:00:39,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:00:39,020 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-15 03:00:39,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:39,022 INFO L225 Difference]: With dead ends: 53 [2019-10-15 03:00:39,022 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 03:00:39,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-10-15 03:00:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 03:00:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-15 03:00:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 03:00:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-15 03:00:39,035 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2019-10-15 03:00:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:39,035 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-15 03:00:39,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:00:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-15 03:00:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:00:39,037 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:39,037 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:39,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:39,242 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:39,242 INFO L82 PathProgramCache]: Analyzing trace with hash 531961720, now seen corresponding path program 1 times [2019-10-15 03:00:39,243 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:39,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349138216] [2019-10-15 03:00:39,243 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:39,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:39,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:39,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349138216] [2019-10-15 03:00:39,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566353564] [2019-10-15 03:00:39,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:39,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:00:39,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:00:39,698 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:00:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:00:39,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801100122] [2019-10-15 03:00:39,854 INFO L162 IcfgInterpreter]: Started Sifa with 31 locations of interest [2019-10-15 03:00:39,855 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:00:39,862 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:00:39,875 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:00:39,885 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:00:40,019 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 03:00:40,153 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:42,444 INFO L199 IcfgInterpreter]: Interpreting procedure sll_get_data_at with input of size 1 for LOIs [2019-10-15 03:00:42,448 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 33 for LOIs [2019-10-15 03:00:43,401 INFO L199 IcfgInterpreter]: Interpreting procedure node_create with input of size 29 for LOIs [2019-10-15 03:00:43,446 INFO L199 IcfgInterpreter]: Interpreting procedure sll_update_at with input of size 30 for LOIs [2019-10-15 03:00:43,461 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:00:43,464 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:00:44,588 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2019-10-15 03:00:45,280 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2019-10-15 03:00:45,281 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:00:45,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [14, 6, 6] total 34 [2019-10-15 03:00:45,282 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238931393] [2019-10-15 03:00:45,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-15 03:00:45,283 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-15 03:00:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 03:00:45,284 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 20 states. [2019-10-15 03:00:46,157 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2019-10-15 03:00:46,904 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-10-15 03:00:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:47,163 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2019-10-15 03:00:47,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 03:00:47,164 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2019-10-15 03:00:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:47,166 INFO L225 Difference]: With dead ends: 54 [2019-10-15 03:00:47,167 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 03:00:47,168 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=229, Invalid=2321, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 03:00:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 03:00:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-10-15 03:00:47,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 03:00:47,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-15 03:00:47,178 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 32 [2019-10-15 03:00:47,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:47,179 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-15 03:00:47,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-15 03:00:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-15 03:00:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 03:00:47,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:47,181 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:47,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:47,385 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:47,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1305805873, now seen corresponding path program 1 times [2019-10-15 03:00:47,385 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:47,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944745634] [2019-10-15 03:00:47,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:47,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:47,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:00:47,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944745634] [2019-10-15 03:00:47,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666477192] [2019-10-15 03:00:47,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:47,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:00:47,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:00:47,703 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:00:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:00:47,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628271271] [2019-10-15 03:00:47,788 INFO L162 IcfgInterpreter]: Started Sifa with 31 locations of interest [2019-10-15 03:00:47,788 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:00:47,789 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:00:47,789 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:00:47,789 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:00:47,815 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 03:00:47,864 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:00:51,332 INFO L199 IcfgInterpreter]: Interpreting procedure sll_get_data_at with input of size 17 for LOIs [2019-10-15 03:00:51,346 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 33 for LOIs [2019-10-15 03:00:52,432 INFO L199 IcfgInterpreter]: Interpreting procedure node_create with input of size 29 for LOIs [2019-10-15 03:00:52,471 INFO L199 IcfgInterpreter]: Interpreting procedure sll_update_at with input of size 54 for LOIs [2019-10-15 03:00:52,587 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:00:52,590 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:00:53,635 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2019-10-15 03:00:54,192 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2019-10-15 03:00:54,715 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:00:54,716 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [12, 6, 6] total 37 [2019-10-15 03:00:54,716 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153423202] [2019-10-15 03:00:54,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 03:00:54,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:54,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 03:00:54,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 03:00:54,720 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 25 states. [2019-10-15 03:00:55,293 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2019-10-15 03:00:55,599 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2019-10-15 03:00:56,377 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2019-10-15 03:00:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:57,254 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-10-15 03:00:57,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-15 03:00:57,254 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2019-10-15 03:00:57,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:57,256 INFO L225 Difference]: With dead ends: 64 [2019-10-15 03:00:57,256 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 03:00:57,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=284, Invalid=3138, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 03:00:57,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 03:00:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2019-10-15 03:00:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 03:00:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-15 03:00:57,273 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 33 [2019-10-15 03:00:57,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:57,276 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-15 03:00:57,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 03:00:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-15 03:00:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-15 03:00:57,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:57,278 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:57,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:57,479 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:57,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1066338386, now seen corresponding path program 1 times [2019-10-15 03:00:57,480 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:57,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063639433] [2019-10-15 03:00:57,481 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:57,481 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:57,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:00:57,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063639433] [2019-10-15 03:00:57,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637913088] [2019-10-15 03:00:57,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:00:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:57,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:00:57,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:00:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:00:57,782 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:00:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:00:57,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1293904063] [2019-10-15 03:00:57,862 INFO L162 IcfgInterpreter]: Started Sifa with 31 locations of interest [2019-10-15 03:00:57,862 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:00:57,863 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:00:57,863 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:00:57,863 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:00:57,879 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 03:00:57,937 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:01,778 INFO L199 IcfgInterpreter]: Interpreting procedure sll_get_data_at with input of size 19 for LOIs [2019-10-15 03:01:01,841 INFO L199 IcfgInterpreter]: Interpreting procedure sll_create with input of size 33 for LOIs [2019-10-15 03:01:02,516 INFO L199 IcfgInterpreter]: Interpreting procedure node_create with input of size 29 for LOIs [2019-10-15 03:01:02,556 INFO L199 IcfgInterpreter]: Interpreting procedure sll_update_at with input of size 40 for LOIs [2019-10-15 03:01:02,654 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:02,657 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:03,325 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2019-10-15 03:01:03,641 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2019-10-15 03:01:04,212 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-10-15 03:01:04,772 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2019-10-15 03:01:04,937 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2019-10-15 03:01:05,014 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:05,014 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 27] total 34 [2019-10-15 03:01:05,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912972778] [2019-10-15 03:01:05,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 03:01:05,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:05,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 03:01:05,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 03:01:05,017 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 34 states. [2019-10-15 03:01:05,637 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2019-10-15 03:01:05,967 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2019-10-15 03:01:06,319 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2019-10-15 03:01:06,962 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2019-10-15 03:01:07,152 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2019-10-15 03:01:07,871 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2019-10-15 03:01:08,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:08,466 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2019-10-15 03:01:08,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 03:01:08,466 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 40 [2019-10-15 03:01:08,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:08,467 INFO L225 Difference]: With dead ends: 82 [2019-10-15 03:01:08,467 INFO L226 Difference]: Without dead ends: 53 [2019-10-15 03:01:08,470 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=359, Invalid=3547, Unknown=0, NotChecked=0, Total=3906 [2019-10-15 03:01:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-15 03:01:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2019-10-15 03:01:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-15 03:01:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-10-15 03:01:08,481 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 40 [2019-10-15 03:01:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:08,481 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-10-15 03:01:08,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-15 03:01:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-10-15 03:01:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-15 03:01:08,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:08,483 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:08,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:08,687 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:08,688 INFO L82 PathProgramCache]: Analyzing trace with hash -234886012, now seen corresponding path program 2 times [2019-10-15 03:01:08,689 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:08,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17778426] [2019-10-15 03:01:08,689 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:08,689 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:08,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:10,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17778426] [2019-10-15 03:01:10,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532251199] [2019-10-15 03:01:10,469 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:10,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 03:01:10,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:10,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 128 conjunts are in the unsatisfiable core [2019-10-15 03:01:10,792 INFO L279 TraceCheckSpWp]: Computing forward predicates...