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/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:03:44,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:03:44,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:03:44,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:03:44,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:03:44,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:03:44,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:03:44,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:03:44,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:03:44,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:03:44,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:03:44,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:03:44,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:03:44,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:03:44,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:03:44,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:03:44,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:03:44,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:03:44,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:03:44,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:03:44,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:03:44,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:03:44,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:03:44,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:03:44,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:03:44,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:03:44,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:03:44,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:03:44,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:03:44,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:03:44,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:03:44,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:03:44,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:03:44,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:03:44,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:03:44,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:03:44,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:03:44,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:03:44,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:03:44,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:03:44,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:03:44,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:03:44,409 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:03:44,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:03:44,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:03:44,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:03:44,414 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:03:44,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:03:44,415 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:03:44,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:03:44,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:03:44,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:03:44,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:03:44,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:03:44,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:03:44,416 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:03:44,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:03:44,417 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:03:44,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:03:44,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:03:44,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:03:44,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:03:44,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:03:44,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:44,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:03:44,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:03:44,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:03:44,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:03:44,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:03:44,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:03:44,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:03:44,732 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:03:44,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:03:44,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:03:44,760 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:03:44,760 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:03:44,761 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2019-10-15 03:03:44,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70bce9c17/eaef5f9631e343e2a647e2a66203eb86/FLAG6ca4157bf [2019-10-15 03:03:45,378 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:03:45,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2019-10-15 03:03:45,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70bce9c17/eaef5f9631e343e2a647e2a66203eb86/FLAG6ca4157bf [2019-10-15 03:03:45,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70bce9c17/eaef5f9631e343e2a647e2a66203eb86 [2019-10-15 03:03:45,710 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:03:45,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:03:45,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:45,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:03:45,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:03:45,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:45" (1/1) ... [2019-10-15 03:03:45,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11d05d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:45, skipping insertion in model container [2019-10-15 03:03:45,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:45" (1/1) ... [2019-10-15 03:03:45,730 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:03:45,759 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:03:45,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:46,007 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:03:46,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:46,181 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:03:46,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:46 WrapperNode [2019-10-15 03:03:46,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:46,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:03:46,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:03:46,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:03:46,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:46" (1/1) ... [2019-10-15 03:03:46,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:46" (1/1) ... [2019-10-15 03:03:46,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:46" (1/1) ... [2019-10-15 03:03:46,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:46" (1/1) ... [2019-10-15 03:03:46,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:46" (1/1) ... [2019-10-15 03:03:46,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:46" (1/1) ... [2019-10-15 03:03:46,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:46" (1/1) ... [2019-10-15 03:03:46,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:03:46,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:03:46,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:03:46,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:03:46,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:46,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:03:46,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:03:46,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:03:46,293 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2019-10-15 03:03:46,293 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-10-15 03:03:46,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:03:46,295 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2019-10-15 03:03:46,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:03:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:03:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-10-15 03:03:46,296 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2019-10-15 03:03:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2019-10-15 03:03:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-15 03:03:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2019-10-15 03:03:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2019-10-15 03:03:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2019-10-15 03:03:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2019-10-15 03:03:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2019-10-15 03:03:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2019-10-15 03:03:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2019-10-15 03:03:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2019-10-15 03:03:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2019-10-15 03:03:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2019-10-15 03:03:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2019-10-15 03:03:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2019-10-15 03:03:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2019-10-15 03:03:46,300 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2019-10-15 03:03:46,300 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2019-10-15 03:03:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2019-10-15 03:03:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2019-10-15 03:03:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2019-10-15 03:03:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2019-10-15 03:03:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2019-10-15 03:03:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2019-10-15 03:03:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2019-10-15 03:03:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2019-10-15 03:03:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2019-10-15 03:03:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2019-10-15 03:03:46,302 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2019-10-15 03:03:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2019-10-15 03:03:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2019-10-15 03:03:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2019-10-15 03:03:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2019-10-15 03:03:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2019-10-15 03:03:46,303 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2019-10-15 03:03:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure index [2019-10-15 03:03:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2019-10-15 03:03:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2019-10-15 03:03:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2019-10-15 03:03:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2019-10-15 03:03:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2019-10-15 03:03:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2019-10-15 03:03:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2019-10-15 03:03:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2019-10-15 03:03:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2019-10-15 03:03:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2019-10-15 03:03:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:03:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2019-10-15 03:03:46,306 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-10-15 03:03:46,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:03:46,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:03:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:03:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:03:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2019-10-15 03:03:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:03:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:03:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:03:46,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-15 03:03:46,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-10-15 03:03:46,973 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:03:46,973 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 03:03:46,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:46 BoogieIcfgContainer [2019-10-15 03:03:46,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:03:46,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:03:46,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:03:46,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:03:46,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:03:45" (1/3) ... [2019-10-15 03:03:46,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417b457d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:46, skipping insertion in model container [2019-10-15 03:03:46,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:46" (2/3) ... [2019-10-15 03:03:46,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417b457d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:46, skipping insertion in model container [2019-10-15 03:03:46,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:46" (3/3) ... [2019-10-15 03:03:46,983 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c24.i [2019-10-15 03:03:46,993 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:03:47,002 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:03:47,013 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:03:47,041 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:03:47,042 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:03:47,042 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:03:47,042 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:03:47,043 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:03:47,043 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:03:47,043 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:03:47,043 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:03:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2019-10-15 03:03:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:03:47,069 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:47,070 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:47,072 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:47,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1089030475, now seen corresponding path program 1 times [2019-10-15 03:03:47,090 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:47,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532178826] [2019-10-15 03:03:47,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:47,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:47,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:47,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532178826] [2019-10-15 03:03:47,273 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:47,273 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:03:47,274 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724622167] [2019-10-15 03:03:47,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:03:47,279 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:47,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:03:47,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:03:47,295 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2019-10-15 03:03:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:47,372 INFO L93 Difference]: Finished difference Result 100 states and 137 transitions. [2019-10-15 03:03:47,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:03:47,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 03:03:47,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:47,384 INFO L225 Difference]: With dead ends: 100 [2019-10-15 03:03:47,384 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 03:03:47,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:03:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 03:03:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2019-10-15 03:03:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-15 03:03:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-10-15 03:03:47,434 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 11 [2019-10-15 03:03:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:47,436 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-10-15 03:03:47,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:03:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-10-15 03:03:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 03:03:47,438 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:47,438 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:47,438 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2137322534, now seen corresponding path program 1 times [2019-10-15 03:03:47,439 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:47,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008875274] [2019-10-15 03:03:47,440 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:47,440 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:47,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:03:47,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008875274] [2019-10-15 03:03:47,567 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:47,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 03:03:47,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635008123] [2019-10-15 03:03:47,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:03:47,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:03:47,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:03:47,570 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 6 states. [2019-10-15 03:03:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:47,714 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-10-15 03:03:47,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:03:47,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-15 03:03:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:47,716 INFO L225 Difference]: With dead ends: 60 [2019-10-15 03:03:47,717 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 03:03:47,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:03:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 03:03:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2019-10-15 03:03:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 03:03:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-15 03:03:47,740 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 16 [2019-10-15 03:03:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:47,740 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-15 03:03:47,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:03:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-15 03:03:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:03:47,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:47,743 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:47,744 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:47,744 INFO L82 PathProgramCache]: Analyzing trace with hash 134584389, now seen corresponding path program 1 times [2019-10-15 03:03:47,744 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:47,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435022745] [2019-10-15 03:03:47,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:47,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:47,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:03:47,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435022745] [2019-10-15 03:03:47,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031694613] [2019-10-15 03:03:47,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:47,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:03:47,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:03:48,036 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:03:48,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37677751] [2019-10-15 03:03:48,147 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 03:03:48,148 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:48,163 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:48,174 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:48,175 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:48,420 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:03:49,170 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:49,197 INFO L199 IcfgInterpreter]: Interpreting procedure foo with input of size 3 for LOIs [2019-10-15 03:03:49,208 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:03:49,217 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:50,545 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:50,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 20] total 29 [2019-10-15 03:03:50,545 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134262051] [2019-10-15 03:03:50,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 03:03:50,547 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:50,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 03:03:50,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2019-10-15 03:03:50,548 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 29 states. [2019-10-15 03:03:51,200 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2019-10-15 03:03:51,434 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 21 [2019-10-15 03:03:51,746 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 21 [2019-10-15 03:03:51,907 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2019-10-15 03:03:52,397 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2019-10-15 03:03:52,895 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2019-10-15 03:03:53,505 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2019-10-15 03:03:53,753 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2019-10-15 03:03:55,860 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-10-15 03:03:56,108 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2019-10-15 03:03:58,303 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2019-10-15 03:03:59,064 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2019-10-15 03:04:01,571 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2019-10-15 03:04:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:05,808 INFO L93 Difference]: Finished difference Result 454 states and 669 transitions. [2019-10-15 03:04:05,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2019-10-15 03:04:05,809 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 24 [2019-10-15 03:04:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:05,820 INFO L225 Difference]: With dead ends: 454 [2019-10-15 03:04:05,820 INFO L226 Difference]: Without dead ends: 418 [2019-10-15 03:04:05,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9497 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=2725, Invalid=22715, Unknown=0, NotChecked=0, Total=25440 [2019-10-15 03:04:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2019-10-15 03:04:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 107. [2019-10-15 03:04:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-15 03:04:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2019-10-15 03:04:05,885 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 24 [2019-10-15 03:04:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:05,886 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2019-10-15 03:04:05,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 03:04:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2019-10-15 03:04:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-15 03:04:05,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:05,890 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:06,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:06,092 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:06,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:06,093 INFO L82 PathProgramCache]: Analyzing trace with hash -90508299, now seen corresponding path program 2 times [2019-10-15 03:04:06,093 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:06,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52755616] [2019-10-15 03:04:06,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:06,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:06,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 03:04:06,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52755616] [2019-10-15 03:04:06,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433687472] [2019-10-15 03:04:06,368 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 03:04:06,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:04:06,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:04:06,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:04:06,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 03:04:06,574 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 03:04:06,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680857167] [2019-10-15 03:04:06,752 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 03:04:06,753 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:04:06,754 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:04:06,754 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:04:06,754 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:04:06,796 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:04:07,929 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:04:07,944 INFO L199 IcfgInterpreter]: Interpreting procedure foo with input of size 3 for LOIs [2019-10-15 03:04:07,947 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:04:07,951 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:04:09,128 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:04:09,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 20] total 36 [2019-10-15 03:04:09,128 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680829695] [2019-10-15 03:04:09,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-15 03:04:09,130 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:09,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-15 03:04:09,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 03:04:09,131 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand 36 states. [2019-10-15 03:04:10,809 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2019-10-15 03:04:11,051 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2019-10-15 03:04:11,256 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2019-10-15 03:04:14,532 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2019-10-15 03:04:15,704 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2019-10-15 03:04:16,000 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2019-10-15 03:04:17,107 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2019-10-15 03:04:18,508 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2019-10-15 03:04:19,217 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2019-10-15 03:04:21,803 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2019-10-15 03:04:26,063 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2019-10-15 03:04:26,539 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2019-10-15 03:04:27,682 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-10-15 03:04:32,804 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38