/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/list-simple/dll2n_update_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:56:37,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:56:37,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:56:37,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:56:37,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:56:37,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:56:37,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:56:37,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:56:37,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:56:37,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:56:37,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:56:37,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:56:37,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:56:37,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:56:37,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:56:37,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:56:37,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:56:37,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:56:37,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:56:37,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:56:37,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:56:37,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:56:37,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:56:37,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:56:37,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 03:56:37,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 03:56:37,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 03:56:37,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 03:56:37,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 03:56:37,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 03:56:37,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 03:56:37,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 03:56:37,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 03:56:37,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 03:56:37,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 03:56:37,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 03:56:37,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 03:56:37,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 03:56:37,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:56:37,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:56:37,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:56:37,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 03:56:37,311 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:56:37,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:56:37,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:56:37,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:56:37,313 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:56:37,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:56:37,314 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:56:37,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:56:37,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:56:37,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:56:37,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:56:37,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:56:37,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:56:37,315 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:56:37,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:56:37,315 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:56:37,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:56:37,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:56:37,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:56:37,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:56:37,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:56:37,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:56:37,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:56:37,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:56:37,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:56:37,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:56:37,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:56:37,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:56:37,319 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 03:56:37,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:56:37,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:56:37,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:56:37,618 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:56:37,619 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:56:37,619 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_update_all.i [2019-11-07 03:56:37,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe8c9964/bdd9ceb62b16443d987b4f8a4096829b/FLAG64b677043 [2019-11-07 03:56:38,246 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:56:38,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_update_all.i [2019-11-07 03:56:38,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe8c9964/bdd9ceb62b16443d987b4f8a4096829b/FLAG64b677043 [2019-11-07 03:56:38,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe8c9964/bdd9ceb62b16443d987b4f8a4096829b [2019-11-07 03:56:38,530 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:56:38,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:56:38,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:56:38,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:56:38,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:56:38,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:56:38" (1/1) ... [2019-11-07 03:56:38,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28741a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:38, skipping insertion in model container [2019-11-07 03:56:38,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:56:38" (1/1) ... [2019-11-07 03:56:38,547 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:56:38,586 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:56:39,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:56:39,034 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:56:39,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:56:39,129 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:56:39,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:39 WrapperNode [2019-11-07 03:56:39,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:56:39,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:56:39,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:56:39,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:56:39,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:39" (1/1) ... [2019-11-07 03:56:39,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:39" (1/1) ... [2019-11-07 03:56:39,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:39" (1/1) ... [2019-11-07 03:56:39,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:39" (1/1) ... [2019-11-07 03:56:39,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:39" (1/1) ... [2019-11-07 03:56:39,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:39" (1/1) ... [2019-11-07 03:56:39,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:39" (1/1) ... [2019-11-07 03:56:39,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:56:39,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:56:39,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:56:39,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:56:39,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:56:39,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:56:39,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:56:39,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-07 03:56:39,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-07 03:56:39,266 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-07 03:56:39,267 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-07 03:56:39,267 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-11-07 03:56:39,268 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2019-11-07 03:56:39,268 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_get_data_at [2019-11-07 03:56:39,268 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_update_at [2019-11-07 03:56:39,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:56:39,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:56:39,269 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-07 03:56:39,270 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-07 03:56:39,270 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-07 03:56:39,270 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-07 03:56:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-07 03:56:39,272 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-07 03:56:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-07 03:56:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-07 03:56:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-07 03:56:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-07 03:56:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-07 03:56:39,273 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-07 03:56:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-07 03:56:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-07 03:56:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-07 03:56:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-07 03:56:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-07 03:56:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-07 03:56:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-07 03:56:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-07 03:56:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-07 03:56:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-07 03:56:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-07 03:56:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-07 03:56:39,276 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-07 03:56:39,276 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-07 03:56:39,276 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-07 03:56:39,276 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-07 03:56:39,276 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-07 03:56:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-07 03:56:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-07 03:56:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-07 03:56:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-07 03:56:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-07 03:56:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-07 03:56:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-07 03:56:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-07 03:56:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-07 03:56:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-07 03:56:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-07 03:56:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-07 03:56:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-07 03:56:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-07 03:56:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-07 03:56:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-07 03:56:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-07 03:56:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-07 03:56:39,280 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-07 03:56:39,280 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-07 03:56:39,280 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-07 03:56:39,280 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-07 03:56:39,280 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-07 03:56:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 03:56:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 03:56:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-07 03:56:39,281 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 03:56:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-07 03:56:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-07 03:56:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-07 03:56:39,282 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-07 03:56:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-07 03:56:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-07 03:56:39,284 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-07 03:56:39,284 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-07 03:56:39,284 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-07 03:56:39,285 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 03:56:39,285 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-07 03:56:39,285 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-07 03:56:39,286 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-07 03:56:39,287 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-07 03:56:39,287 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-07 03:56:39,287 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-07 03:56:39,287 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-07 03:56:39,287 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-07 03:56:39,287 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-07 03:56:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-07 03:56:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-07 03:56:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-07 03:56:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-07 03:56:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-07 03:56:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-07 03:56:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-07 03:56:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-07 03:56:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-07 03:56:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-07 03:56:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-07 03:56:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-07 03:56:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-07 03:56:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-07 03:56:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-07 03:56:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-07 03:56:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-07 03:56:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-07 03:56:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-07 03:56:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-07 03:56:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-07 03:56:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-07 03:56:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-07 03:56:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-07 03:56:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-07 03:56:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-07 03:56:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-07 03:56:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-07 03:56:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-07 03:56:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-07 03:56:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-07 03:56:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-07 03:56:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 03:56:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 03:56:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:56:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-11-07 03:56:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2019-11-07 03:56:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 03:56:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:56:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure dll_get_data_at [2019-11-07 03:56:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:56:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure dll_update_at [2019-11-07 03:56:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:56:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:56:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:56:39,670 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-07 03:56:40,041 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:56:40,042 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-07 03:56:40,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:56:40 BoogieIcfgContainer [2019-11-07 03:56:40,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:56:40,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:56:40,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:56:40,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:56:40,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:56:38" (1/3) ... [2019-11-07 03:56:40,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c713882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:56:40, skipping insertion in model container [2019-11-07 03:56:40,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:56:39" (2/3) ... [2019-11-07 03:56:40,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c713882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:56:40, skipping insertion in model container [2019-11-07 03:56:40,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:56:40" (3/3) ... [2019-11-07 03:56:40,060 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_update_all.i [2019-11-07 03:56:40,068 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:56:40,074 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:56:40,084 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:56:40,105 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:56:40,105 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:56:40,105 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:56:40,106 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:56:40,106 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:56:40,106 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:56:40,106 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:56:40,106 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:56:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-07 03:56:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 03:56:40,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:56:40,130 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:56:40,132 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:56:40,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:56:40,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1826980545, now seen corresponding path program 1 times [2019-11-07 03:56:40,148 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:56:40,148 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683728898] [2019-11-07 03:56:40,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:56:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:56:40,383 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683728898] [2019-11-07 03:56:40,384 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:56:40,384 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 03:56:40,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395567270] [2019-11-07 03:56:40,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:56:40,391 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:56:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:56:40,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:56:40,404 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2019-11-07 03:56:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:56:40,515 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2019-11-07 03:56:40,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:56:40,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-07 03:56:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:56:40,526 INFO L225 Difference]: With dead ends: 69 [2019-11-07 03:56:40,526 INFO L226 Difference]: Without dead ends: 30 [2019-11-07 03:56:40,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 03:56:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-07 03:56:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-11-07 03:56:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 03:56:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-07 03:56:40,563 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-11-07 03:56:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:56:40,564 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-07 03:56:40,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:56:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-07 03:56:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 03:56:40,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:56:40,566 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:56:40,566 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:56:40,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:56:40,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1740061534, now seen corresponding path program 1 times [2019-11-07 03:56:40,567 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:56:40,567 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552429983] [2019-11-07 03:56:40,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:56:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:56:40,684 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552429983] [2019-11-07 03:56:40,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510843473] [2019-11-07 03:56:40,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:56:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:40,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 03:56:40,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:56:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:56:40,909 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:56:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:56:41,066 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979231234] [2019-11-07 03:56:41,092 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 03:56:41,092 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:56:41,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:56:41,106 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:56:41,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:56:41,255 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 03:56:41,385 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:41,837 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:42,083 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:42,653 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:42,666 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:42,680 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:42,695 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:43,309 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 33 for LOIs [2019-11-07 03:56:44,352 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:44,446 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:44,455 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:45,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:56:45,565 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:56:45,980 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 03:56:45,980 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 18 [2019-11-07 03:56:45,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656707159] [2019-11-07 03:56:45,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 03:56:45,987 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:56:45,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 03:56:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2019-11-07 03:56:45,988 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 12 states. [2019-11-07 03:56:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:56:46,573 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-11-07 03:56:46,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 03:56:46,575 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-07 03:56:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:56:46,577 INFO L225 Difference]: With dead ends: 40 [2019-11-07 03:56:46,577 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 03:56:46,579 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2019-11-07 03:56:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 03:56:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-07 03:56:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 03:56:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-07 03:56:46,600 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2019-11-07 03:56:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:56:46,601 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-07 03:56:46,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 03:56:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-07 03:56:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 03:56:46,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:56:46,606 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:56:46,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:56:46,813 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:56:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:56:46,813 INFO L82 PathProgramCache]: Analyzing trace with hash 696544704, now seen corresponding path program 1 times [2019-11-07 03:56:46,813 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:56:46,814 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019676971] [2019-11-07 03:56:46,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:56:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:56:46,961 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019676971] [2019-11-07 03:56:46,961 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099460394] [2019-11-07 03:56:46,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:56:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:47,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 03:56:47,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:56:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:56:47,111 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:56:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:56:47,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671589115] [2019-11-07 03:56:47,188 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2019-11-07 03:56:47,188 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:56:47,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:56:47,189 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:56:47,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:56:47,214 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 03:56:47,266 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:47,490 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:47,679 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:48,022 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:48,069 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:48,079 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:48,127 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:48,771 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 33 for LOIs [2019-11-07 03:56:50,184 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:50,193 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:50,468 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:51,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:56:51,654 INFO L197 IcfgInterpreter]: Interpreting procedure dll_update_at with input of size 57 for LOIs [2019-11-07 03:56:51,662 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:56:52,272 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2019-11-07 03:56:52,532 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2019-11-07 03:56:52,739 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2019-11-07 03:56:52,985 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-11-07 03:56:53,186 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2019-11-07 03:56:53,319 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 03:56:53,320 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6, 6, 6] total 23 [2019-11-07 03:56:53,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046246631] [2019-11-07 03:56:53,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 03:56:53,321 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:56:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 03:56:53,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2019-11-07 03:56:53,323 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 17 states. [2019-11-07 03:56:53,934 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-11-07 03:56:54,176 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-11-07 03:56:54,421 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2019-11-07 03:56:54,669 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-11-07 03:56:54,839 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-11-07 03:56:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:56:55,150 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2019-11-07 03:56:55,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 03:56:55,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2019-11-07 03:56:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:56:55,154 INFO L225 Difference]: With dead ends: 45 [2019-11-07 03:56:55,154 INFO L226 Difference]: Without dead ends: 36 [2019-11-07 03:56:55,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 03:56:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-07 03:56:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-07 03:56:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-07 03:56:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-07 03:56:55,163 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 28 [2019-11-07 03:56:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:56:55,164 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-07 03:56:55,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 03:56:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-07 03:56:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 03:56:55,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:56:55,166 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:56:55,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:56:55,372 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:56:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:56:55,372 INFO L82 PathProgramCache]: Analyzing trace with hash -275507159, now seen corresponding path program 1 times [2019-11-07 03:56:55,372 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:56:55,372 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729763696] [2019-11-07 03:56:55,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:56:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 03:56:55,535 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729763696] [2019-11-07 03:56:55,536 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876510844] [2019-11-07 03:56:55,536 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 [2019-11-07 03:56:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:56:55,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 03:56:55,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:56:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 03:56:55,685 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:56:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 03:56:55,761 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118356354] [2019-11-07 03:56:55,764 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2019-11-07 03:56:55,764 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:56:55,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:56:55,765 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:56:55,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:56:55,788 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 03:56:55,835 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:56,044 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:56,513 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:56,751 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:56,889 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:56,900 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:57,031 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:57,658 INFO L197 IcfgInterpreter]: Interpreting procedure dll_get_data_at with input of size 17 for LOIs [2019-11-07 03:56:57,662 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 33 for LOIs [2019-11-07 03:56:59,407 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:59,471 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:56:59,480 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 03:57:00,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:57:00,473 INFO L197 IcfgInterpreter]: Interpreting procedure dll_update_at with input of size 30 for LOIs [2019-11-07 03:57:00,530 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:57:01,641 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2019-11-07 03:57:02,256 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-11-07 03:57:02,258 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:57:02,259 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 24] total 34 [2019-11-07 03:57:02,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392679335] [2019-11-07 03:57:02,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-07 03:57:02,260 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:57:02,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-07 03:57:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 03:57:02,261 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 34 states. [2019-11-07 03:57:03,411 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-11-07 03:57:03,549 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-11-07 03:57:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:57:05,074 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2019-11-07 03:57:05,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 03:57:05,076 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 29 [2019-11-07 03:57:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:57:05,077 INFO L225 Difference]: With dead ends: 82 [2019-11-07 03:57:05,077 INFO L226 Difference]: Without dead ends: 59 [2019-11-07 03:57:05,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=394, Invalid=3512, Unknown=0, NotChecked=0, Total=3906 [2019-11-07 03:57:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-07 03:57:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2019-11-07 03:57:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-07 03:57:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2019-11-07 03:57:05,137 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 29 [2019-11-07 03:57:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:57:05,138 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2019-11-07 03:57:05,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-07 03:57:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2019-11-07 03:57:05,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-07 03:57:05,140 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:57:05,141 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:57:05,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:57:05,345 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:57:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:57:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1341099098, now seen corresponding path program 2 times [2019-11-07 03:57:05,346 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:57:05,346 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350478031] [2019-11-07 03:57:05,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:57:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:57:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:57:06,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350478031] [2019-11-07 03:57:06,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035599164] [2019-11-07 03:57:06,391 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:57:06,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 03:57:06,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:57:06,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 89 conjunts are in the unsatisfiable core [2019-11-07 03:57:06,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:57:08,257 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_update_at_~head.offset Int) (dll_update_at_~data Int)) (= |c_#memory_int| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_update_at_#in~head.base|) (+ |c_dll_update_at_#in~head.offset| 4)))) (store |c_old(#memory_int)| .cse0 (store (select |c_old(#memory_int)| .cse0) dll_update_at_~head.offset dll_update_at_~data))))) is different from true [2019-11-07 03:57:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-11-07 03:57:08,737 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:57:09,479 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-11-07 03:57:11,731 WARN L191 SmtUtils]: Spent 1000.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2019-11-07 03:57:11,739 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9