java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:58:21,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:58:21,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:58:21,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 02:58:21,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 02:58:21,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 02:58:21,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 02:58:21,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 02:58:21,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 02:58:21,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 02:58:21,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 02:58:21,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 02:58:21,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 02:58:21,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 02:58:21,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 02:58:21,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 02:58:21,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 02:58:21,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 02:58:21,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 02:58:21,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 02:58:21,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 02:58:21,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 02:58:21,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 02:58:21,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 02:58:21,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 02:58:21,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 02:58:21,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 02:58:21,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 02:58:21,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 02:58:21,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 02:58:21,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 02:58:21,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 02:58:21,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 02:58:21,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 02:58:21,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 02:58:21,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 02:58:21,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 02:58:21,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 02:58:21,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:58:21,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:58:21,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:58:21,357 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 02:58:21,383 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:58:21,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:58:21,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:58:21,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:58:21,385 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:58:21,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:58:21,386 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:58:21,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:58:21,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:58:21,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:58:21,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:58:21,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:58:21,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:58:21,387 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:58:21,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:58:21,388 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:58:21,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:58:21,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:58:21,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:58:21,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:58:21,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:58:21,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:58:21,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:58:21,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:58:21,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:58:21,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:58:21,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:58:21,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:58:21,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 02:58:21,660 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:58:21,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:58:21,676 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:58:21,678 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:58:21,678 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:58:21,679 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i [2019-10-15 02:58:21,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a19c45c7/788a6cba66674fbca0a9dead6defb140/FLAG5a120a80e [2019-10-15 02:58:22,292 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:58:22,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i [2019-10-15 02:58:22,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a19c45c7/788a6cba66674fbca0a9dead6defb140/FLAG5a120a80e [2019-10-15 02:58:22,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a19c45c7/788a6cba66674fbca0a9dead6defb140 [2019-10-15 02:58:22,574 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:58:22,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:58:22,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:58:22,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:58:22,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:58:22,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:58:22" (1/1) ... [2019-10-15 02:58:22,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45b35c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:22, skipping insertion in model container [2019-10-15 02:58:22,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:58:22" (1/1) ... [2019-10-15 02:58:22,592 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:58:22,639 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:58:23,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:58:23,061 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:58:23,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:58:23,189 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:58:23,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:23 WrapperNode [2019-10-15 02:58:23,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:58:23,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:58:23,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:58:23,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:58:23,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:23" (1/1) ... [2019-10-15 02:58:23,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:23" (1/1) ... [2019-10-15 02:58:23,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:23" (1/1) ... [2019-10-15 02:58:23,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:23" (1/1) ... [2019-10-15 02:58:23,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:23" (1/1) ... [2019-10-15 02:58:23,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:23" (1/1) ... [2019-10-15 02:58:23,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:23" (1/1) ... [2019-10-15 02:58:23,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:58:23,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:58:23,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:58:23,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:58:23,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:58:23,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:58:23,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:58:23,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 02:58:23,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 02:58:23,318 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-15 02:58:23,318 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2019-10-15 02:58:23,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:58:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:58:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 02:58:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 02:58:23,319 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 02:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 02:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 02:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 02:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 02:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 02:58:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 02:58:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 02:58:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 02:58:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 02:58:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 02:58:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 02:58:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 02:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 02:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 02:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 02:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 02:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 02:58:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 02:58:23,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 02:58:23,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 02:58:23,324 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 02:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 02:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 02:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 02:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 02:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 02:58:23,325 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 02:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 02:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 02:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 02:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 02:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 02:58:23,326 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 02:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 02:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 02:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 02:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 02:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 02:58:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 02:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 02:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 02:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 02:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 02:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 02:58:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 02:58:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 02:58:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 02:58:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 02:58:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 02:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 02:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 02:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 02:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 02:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 02:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 02:58:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 02:58:23,333 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 02:58:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 02:58:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 02:58:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 02:58:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 02:58:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 02:58:23,336 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 02:58:23,336 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 02:58:23,337 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 02:58:23,337 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 02:58:23,337 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 02:58:23,338 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 02:58:23,338 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 02:58:23,339 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 02:58:23,339 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 02:58:23,339 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 02:58:23,340 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 02:58:23,340 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 02:58:23,340 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 02:58:23,340 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 02:58:23,341 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 02:58:23,341 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 02:58:23,341 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 02:58:23,341 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 02:58:23,341 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 02:58:23,342 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 02:58:23,342 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 02:58:23,342 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 02:58:23,342 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 02:58:23,342 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 02:58:23,342 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 02:58:23,342 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 02:58:23,343 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 02:58:23,343 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 02:58:23,343 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 02:58:23,343 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 02:58:23,343 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 02:58:23,343 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 02:58:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 02:58:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 02:58:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 02:58:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 02:58:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 02:58:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 02:58:23,344 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 02:58:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 02:58:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-15 02:58:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2019-10-15 02:58:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 02:58:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 02:58:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 02:58:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:58:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 02:58:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 02:58:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 02:58:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:58:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:58:23,887 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-15 02:58:24,003 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:58:24,004 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 02:58:24,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:58:24 BoogieIcfgContainer [2019-10-15 02:58:24,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:58:24,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:58:24,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:58:24,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:58:24,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:58:22" (1/3) ... [2019-10-15 02:58:24,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d466c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:58:24, skipping insertion in model container [2019-10-15 02:58:24,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:23" (2/3) ... [2019-10-15 02:58:24,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d466c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:58:24, skipping insertion in model container [2019-10-15 02:58:24,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:58:24" (3/3) ... [2019-10-15 02:58:24,019 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2019-10-15 02:58:24,027 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:58:24,034 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:58:24,045 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:58:24,071 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:58:24,072 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:58:24,072 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:58:24,072 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:58:24,072 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:58:24,073 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:58:24,073 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:58:24,073 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:58:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-15 02:58:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 02:58:24,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:24,101 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:24,103 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1110394879, now seen corresponding path program 1 times [2019-10-15 02:58:24,119 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:24,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582263083] [2019-10-15 02:58:24,120 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:24,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:24,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:24,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582263083] [2019-10-15 02:58:24,399 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:24,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:58:24,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169724711] [2019-10-15 02:58:24,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:58:24,408 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:24,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:58:24,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:58:24,428 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2019-10-15 02:58:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:24,528 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2019-10-15 02:58:24,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:58:24,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-10-15 02:58:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:24,541 INFO L225 Difference]: With dead ends: 52 [2019-10-15 02:58:24,541 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 02:58:24,545 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 02:58:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 02:58:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-15 02:58:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 02:58:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-15 02:58:24,613 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-10-15 02:58:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:24,614 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-15 02:58:24,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:58:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-15 02:58:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 02:58:24,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:24,615 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:24,616 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:24,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1288187898, now seen corresponding path program 1 times [2019-10-15 02:58:24,616 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:24,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581901154] [2019-10-15 02:58:24,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:24,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:24,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:24,721 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 02:58:24,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581901154] [2019-10-15 02:58:24,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682134002] [2019-10-15 02:58:24,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:24,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 02:58:24,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:24,912 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 02:58:24,913 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:58:25,054 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 02:58:25,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [29436459] [2019-10-15 02:58:25,112 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 02:58:25,113 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:58:25,124 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:58:25,132 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:58:25,133 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:58:25,294 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:58:25,455 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:25,914 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:26,534 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:26,547 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:26,623 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:26,679 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:26,717 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:28,738 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:28,909 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:28,919 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:30,197 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2019-10-15 02:58:30,638 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 02:58:30,647 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 02:58:30,651 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 02:58:30,783 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 02:58:30,785 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 02:58:30,788 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 02:58:30,999 INFO L199 IcfgInterpreter]: Interpreting procedure dll_circular_create with input of size 33 for LOIs [2019-10-15 02:58:32,044 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:32,054 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:32,083 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:33,383 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:33,737 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:33,842 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:34,074 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-15 02:58:34,375 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2019-10-15 02:58:34,627 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2019-10-15 02:58:34,985 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2019-10-15 02:58:35,387 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2019-10-15 02:58:35,741 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-10-15 02:58:35,909 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2019-10-15 02:58:36,356 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-10-15 02:58:36,500 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:36,505 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:36,525 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:36,598 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:58:36,601 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:58:36,986 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2019-10-15 02:58:37,865 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:58:37,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 12] total 20 [2019-10-15 02:58:37,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050214367] [2019-10-15 02:58:37,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-15 02:58:37,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-15 02:58:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2019-10-15 02:58:37,871 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 20 states. [2019-10-15 02:58:38,555 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 189 [2019-10-15 02:58:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:39,159 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-10-15 02:58:39,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 02:58:39,160 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 18 [2019-10-15 02:58:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:39,162 INFO L225 Difference]: With dead ends: 42 [2019-10-15 02:58:39,162 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 02:58:39,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2019-10-15 02:58:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 02:58:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2019-10-15 02:58:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 02:58:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-15 02:58:39,170 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2019-10-15 02:58:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:39,171 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-15 02:58:39,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-15 02:58:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-15 02:58:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 02:58:39,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:39,172 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:39,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:39,376 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2069626337, now seen corresponding path program 2 times [2019-10-15 02:58:39,377 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:39,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954058491] [2019-10-15 02:58:39,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:39,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:39,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:39,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954058491] [2019-10-15 02:58:39,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460775417] [2019-10-15 02:58:39,497 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:39,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 02:58:39,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 02:58:39,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 02:58:39,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:39,692 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:58:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:39,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986907827] [2019-10-15 02:58:39,810 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 02:58:39,811 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:58:39,811 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:58:39,812 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:58:39,812 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:58:39,866 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:58:39,944 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:40,184 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:40,644 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:40,665 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:40,685 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:40,693 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:44,938 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:45,228 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:45,748 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:45,761 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:45,934 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:45,984 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:45,993 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:46,241 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2019-10-15 02:58:48,362 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 286 [2019-10-15 02:58:48,803 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-10-15 02:58:48,805 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 02:58:48,808 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 02:58:48,810 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 02:58:48,825 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 02:58:48,827 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 02:58:49,032 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-10-15 02:58:49,034 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 02:58:49,036 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 02:58:49,038 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 02:58:49,050 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 02:58:49,052 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 02:58:49,242 INFO L199 IcfgInterpreter]: Interpreting procedure dll_circular_create with input of size 33 for LOIs [2019-10-15 02:58:50,013 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:50,036 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:50,042 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:50,071 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:50,111 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:50,135 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:50,142 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:50,521 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:50,591 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:50,678 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:50,735 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:51,138 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-15 02:58:51,364 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2019-10-15 02:58:51,605 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2019-10-15 02:58:51,873 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2019-10-15 02:58:52,271 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-10-15 02:58:52,705 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-10-15 02:58:52,822 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:52,837 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:52,843 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:52,848 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:52,899 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:58:52,902 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:58:53,325 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2019-10-15 02:58:54,011 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:58:54,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 12] total 22 [2019-10-15 02:58:54,012 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469947182] [2019-10-15 02:58:54,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 02:58:54,013 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 02:58:54,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2019-10-15 02:58:54,014 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 22 states. [2019-10-15 02:58:54,595 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 186 [2019-10-15 02:58:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:55,218 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-10-15 02:58:55,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 02:58:55,218 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2019-10-15 02:58:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:55,220 INFO L225 Difference]: With dead ends: 45 [2019-10-15 02:58:55,220 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 02:58:55,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 02:58:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 02:58:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-10-15 02:58:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 02:58:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-10-15 02:58:55,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2019-10-15 02:58:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:55,228 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-10-15 02:58:55,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 02:58:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-10-15 02:58:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 02:58:55,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:55,229 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:55,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:55,431 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:55,431 INFO L82 PathProgramCache]: Analyzing trace with hash 630210086, now seen corresponding path program 3 times [2019-10-15 02:58:55,432 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:55,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416948794] [2019-10-15 02:58:55,432 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:55,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:55,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:55,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416948794] [2019-10-15 02:58:55,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830534260] [2019-10-15 02:58:55,536 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:56,060 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 02:58:56,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 02:58:56,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 02:58:56,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:56,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:58:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:56,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [823398991] [2019-10-15 02:58:56,181 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 02:58:56,181 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:58:56,182 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:58:56,182 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:58:56,182 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:58:56,200 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:58:56,258 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 02:58:56,471 WARN L225 Elim1Store]: Array PQE input equivalent to false