/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/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:03:24,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:03:24,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:03:24,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:03:24,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:03:24,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:03:24,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:03:24,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:03:24,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:03:24,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:03:24,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:03:24,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:03:24,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:03:24,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:03:24,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:03:24,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:03:24,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:03:24,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:03:24,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:03:24,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:03:24,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:03:24,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:03:24,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:03:24,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:03:24,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:03:24,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:03:24,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:03:24,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:03:24,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:03:24,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:03:24,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:03:24,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:03:24,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:03:24,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:03:24,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:03:24,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:03:24,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:03:24,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:03:24,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:03:24,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:03:24,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:03:24,716 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 04:03:24,744 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:03:24,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:03:24,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:03:24,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:03:24,748 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:03:24,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:03:24,749 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:03:24,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:03:24,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:03:24,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:03:24,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:03:24,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:03:24,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:03:24,751 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:03:24,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:03:24,751 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:03:24,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:03:24,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:03:24,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:03:24,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:03:24,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:03:24,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:03:24,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:03:24,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:03:24,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:03:24,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:03:24,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:03:24,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:03:24,754 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 04:03:25,039 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:03:25,052 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:03:25,056 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:03:25,058 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:03:25,058 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:03:25,059 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2019-11-07 04:03:25,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcd5e7aa6/a4cec683755c49749acbc88e18c30cde/FLAG00226ce1e [2019-11-07 04:03:25,579 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:03:25,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2019-11-07 04:03:25,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcd5e7aa6/a4cec683755c49749acbc88e18c30cde/FLAG00226ce1e [2019-11-07 04:03:25,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcd5e7aa6/a4cec683755c49749acbc88e18c30cde [2019-11-07 04:03:25,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:03:25,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:03:25,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:03:25,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:03:25,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:03:25,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:03:25" (1/1) ... [2019-11-07 04:03:25,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0532ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:25, skipping insertion in model container [2019-11-07 04:03:25,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:03:25" (1/1) ... [2019-11-07 04:03:25,977 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:03:26,003 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:03:26,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:03:26,403 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:03:26,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:03:26,468 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:03:26,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:26 WrapperNode [2019-11-07 04:03:26,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:03:26,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:03:26,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:03:26,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:03:26,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:26" (1/1) ... [2019-11-07 04:03:26,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:26" (1/1) ... [2019-11-07 04:03:26,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:26" (1/1) ... [2019-11-07 04:03:26,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:26" (1/1) ... [2019-11-07 04:03:26,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:26" (1/1) ... [2019-11-07 04:03:26,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:26" (1/1) ... [2019-11-07 04:03:26,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:26" (1/1) ... [2019-11-07 04:03:26,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:03:26,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:03:26,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:03:26,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:03:26,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:26" (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 04:03:26,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:03:26,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:03:26,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 04:03:26,617 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2019-11-07 04:03:26,617 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-11-07 04:03:26,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:03:26,618 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2019-11-07 04:03:26,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:03:26,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:03:26,619 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-11-07 04:03:26,619 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2019-11-07 04:03:26,619 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2019-11-07 04:03:26,619 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-11-07 04:03:26,619 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2019-11-07 04:03:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2019-11-07 04:03:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2019-11-07 04:03:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2019-11-07 04:03:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2019-11-07 04:03:26,620 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2019-11-07 04:03:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2019-11-07 04:03:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2019-11-07 04:03:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2019-11-07 04:03:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2019-11-07 04:03:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2019-11-07 04:03:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2019-11-07 04:03:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2019-11-07 04:03:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2019-11-07 04:03:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2019-11-07 04:03:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2019-11-07 04:03:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2019-11-07 04:03:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2019-11-07 04:03:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2019-11-07 04:03:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2019-11-07 04:03:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2019-11-07 04:03:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2019-11-07 04:03:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2019-11-07 04:03:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure index [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2019-11-07 04:03:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2019-11-07 04:03:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2019-11-07 04:03:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2019-11-07 04:03:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2019-11-07 04:03:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2019-11-07 04:03:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2019-11-07 04:03:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2019-11-07 04:03:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2019-11-07 04:03:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2019-11-07 04:03:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:03:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2019-11-07 04:03:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-11-07 04:03:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:03:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:03:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:03:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:03:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2019-11-07 04:03:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:03:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:03:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:03:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-11-07 04:03:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-11-07 04:03:27,314 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:03:27,315 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 04:03:27,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:03:27 BoogieIcfgContainer [2019-11-07 04:03:27,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:03:27,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:03:27,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:03:27,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:03:27,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:03:25" (1/3) ... [2019-11-07 04:03:27,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785162d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:03:27, skipping insertion in model container [2019-11-07 04:03:27,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:26" (2/3) ... [2019-11-07 04:03:27,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785162d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:03:27, skipping insertion in model container [2019-11-07 04:03:27,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:03:27" (3/3) ... [2019-11-07 04:03:27,325 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c24.i [2019-11-07 04:03:27,335 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:03:27,343 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:03:27,355 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:03:27,383 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:03:27,383 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:03:27,383 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:03:27,384 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:03:27,384 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:03:27,384 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:03:27,384 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:03:27,385 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:03:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2019-11-07 04:03:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 04:03:27,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:27,416 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:27,420 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1089030475, now seen corresponding path program 1 times [2019-11-07 04:03:27,438 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:27,438 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989558068] [2019-11-07 04:03:27,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:27,606 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 04:03:27,607 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989558068] [2019-11-07 04:03:27,608 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:03:27,608 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:03:27,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750760296] [2019-11-07 04:03:27,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:03:27,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:27,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:03:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:03:27,630 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2019-11-07 04:03:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:27,697 INFO L93 Difference]: Finished difference Result 100 states and 137 transitions. [2019-11-07 04:03:27,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:03:27,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-07 04:03:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:27,708 INFO L225 Difference]: With dead ends: 100 [2019-11-07 04:03:27,708 INFO L226 Difference]: Without dead ends: 54 [2019-11-07 04:03:27,711 INFO L630 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 [2019-11-07 04:03:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-07 04:03:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2019-11-07 04:03:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-07 04:03:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-11-07 04:03:27,753 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 11 [2019-11-07 04:03:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:27,754 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-11-07 04:03:27,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:03:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-11-07 04:03:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 04:03:27,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:27,755 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:27,756 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:27,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2137322534, now seen corresponding path program 1 times [2019-11-07 04:03:27,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:27,757 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636123869] [2019-11-07 04:03:27,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 04:03:27,875 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636123869] [2019-11-07 04:03:27,876 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:03:27,876 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 04:03:27,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608566090] [2019-11-07 04:03:27,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:03:27,878 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:27,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:03:27,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:03:27,879 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 6 states. [2019-11-07 04:03:27,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:27,949 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-11-07 04:03:27,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:03:27,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-07 04:03:27,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:27,952 INFO L225 Difference]: With dead ends: 60 [2019-11-07 04:03:27,952 INFO L226 Difference]: Without dead ends: 55 [2019-11-07 04:03:27,953 INFO L630 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 [2019-11-07 04:03:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-07 04:03:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2019-11-07 04:03:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-07 04:03:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-11-07 04:03:27,965 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 16 [2019-11-07 04:03:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:27,965 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-11-07 04:03:27,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 04:03:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-11-07 04:03:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 04:03:27,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:27,969 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] [2019-11-07 04:03:27,969 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:27,970 INFO L82 PathProgramCache]: Analyzing trace with hash 134584389, now seen corresponding path program 1 times [2019-11-07 04:03:27,970 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:27,970 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960664778] [2019-11-07 04:03:27,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:28,134 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 04:03:28,134 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960664778] [2019-11-07 04:03:28,138 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227412860] [2019-11-07 04:03:28,138 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 04:03:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:28,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:03:28,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:28,316 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 04:03:28,316 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:28,365 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 04:03:28,366 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115531451] [2019-11-07 04:03:28,392 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 04:03:28,392 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:28,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:28,406 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:28,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:28,554 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:03:29,046 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 04:03:29,051 INFO L197 IcfgInterpreter]: Interpreting procedure foo with input of size 3 for LOIs [2019-11-07 04:03:29,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:03:29,056 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:30,089 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:03:30,090 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 20] total 29 [2019-11-07 04:03:30,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495478184] [2019-11-07 04:03:30,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 04:03:30,092 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:30,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 04:03:30,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2019-11-07 04:03:30,093 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 29 states. [2019-11-07 04:03:31,005 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2019-11-07 04:03:31,919 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2019-11-07 04:03:32,506 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2019-11-07 04:03:32,855 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2019-11-07 04:03:33,096 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2019-11-07 04:03:34,034 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2019-11-07 04:03:35,056 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2019-11-07 04:03:36,974 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2019-11-07 04:03:37,175 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2019-11-07 04:03:37,477 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2019-11-07 04:03:37,701 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2019-11-07 04:03:43,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:43,247 INFO L93 Difference]: Finished difference Result 454 states and 669 transitions. [2019-11-07 04:03:43,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2019-11-07 04:03:43,248 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 24 [2019-11-07 04:03:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:43,256 INFO L225 Difference]: With dead ends: 454 [2019-11-07 04:03:43,256 INFO L226 Difference]: Without dead ends: 418 [2019-11-07 04:03:43,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9533 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2726, Invalid=22714, Unknown=0, NotChecked=0, Total=25440 [2019-11-07 04:03:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2019-11-07 04:03:43,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 107. [2019-11-07 04:03:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-07 04:03:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2019-11-07 04:03:43,311 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 24 [2019-11-07 04:03:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:43,311 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2019-11-07 04:03:43,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 04:03:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2019-11-07 04:03:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-07 04:03:43,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:43,315 INFO L410 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] [2019-11-07 04:03:43,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:43,518 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:43,519 INFO L82 PathProgramCache]: Analyzing trace with hash -90508299, now seen corresponding path program 2 times [2019-11-07 04:03:43,519 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:43,519 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113326380] [2019-11-07 04:03:43,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 04:03:43,772 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113326380] [2019-11-07 04:03:43,772 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805379714] [2019-11-07 04:03:43,772 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 [2019-11-07 04:03:43,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 04:03:43,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:03:43,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:03:43,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-07 04:03:43,927 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-07 04:03:44,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1149238884] [2019-11-07 04:03:44,038 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-11-07 04:03:44,038 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:44,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:44,040 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:44,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:44,080 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:03:44,840 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 04:03:44,847 INFO L197 IcfgInterpreter]: Interpreting procedure foo with input of size 3 for LOIs [2019-11-07 04:03:44,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:03:44,852 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:45,770 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:03:45,770 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 20] total 36 [2019-11-07 04:03:45,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081650348] [2019-11-07 04:03:45,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-07 04:03:45,773 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:45,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-07 04:03:45,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 04:03:45,774 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand 36 states. [2019-11-07 04:03:46,553 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 21