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/forester-heap/sll-reverse_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:59:18,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:59:18,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:59:18,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:59:18,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:59:18,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:59:18,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:59:18,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:59:18,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:59:18,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:59:18,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:59:18,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:59:18,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:59:18,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:59:18,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:59:18,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:59:18,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:59:18,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:59:18,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:59:18,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:59:18,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:59:18,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:59:18,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:59:18,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:59:18,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:59:18,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:59:18,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:59:18,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:59:18,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:59:18,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:59:18,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:59:18,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:59:18,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:59:18,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:59:18,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:59:18,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:59:18,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:59:18,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:59:18,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:59:18,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:59:18,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:59:18,687 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 01:59:18,701 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:59:18,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:59:18,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:59:18,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:59:18,705 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:59:18,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:59:18,706 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:59:18,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:59:18,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:59:18,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:59:18,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:59:18,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:59:18,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:59:18,707 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:59:18,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:59:18,708 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:59:18,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:59:18,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:59:18,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:59:18,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:59:18,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:59:18,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:59:18,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:59:18,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:59:18,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:59:18,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:59:18,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:59:18,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:59:18,712 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 01:59:19,069 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:59:19,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:59:19,086 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:59:19,088 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:59:19,088 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:59:19,089 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-reverse_simple.i [2019-10-15 01:59:19,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dec110fca/030fb9e7a7b34bd6a09e2e13d43dd8e7/FLAG0399e82bb [2019-10-15 01:59:19,656 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:59:19,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-reverse_simple.i [2019-10-15 01:59:19,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dec110fca/030fb9e7a7b34bd6a09e2e13d43dd8e7/FLAG0399e82bb [2019-10-15 01:59:19,979 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dec110fca/030fb9e7a7b34bd6a09e2e13d43dd8e7 [2019-10-15 01:59:19,990 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:59:19,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:59:19,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:59:19,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:59:19,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:59:19,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:59:19" (1/1) ... [2019-10-15 01:59:20,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4796d6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20, skipping insertion in model container [2019-10-15 01:59:20,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:59:19" (1/1) ... [2019-10-15 01:59:20,010 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:59:20,068 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:59:20,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:59:20,665 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:59:20,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:59:20,808 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:59:20,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20 WrapperNode [2019-10-15 01:59:20,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:59:20,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:59:20,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:59:20,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:59:20,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20" (1/1) ... [2019-10-15 01:59:20,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20" (1/1) ... [2019-10-15 01:59:20,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20" (1/1) ... [2019-10-15 01:59:20,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20" (1/1) ... [2019-10-15 01:59:20,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20" (1/1) ... [2019-10-15 01:59:20,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20" (1/1) ... [2019-10-15 01:59:20,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20" (1/1) ... [2019-10-15 01:59:20,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:59:20,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:59:20,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:59:20,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:59:20,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20" (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 01:59:20,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:59:20,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:59:20,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:59:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 01:59:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 01:59:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 01:59:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 01:59:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 01:59:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 01:59:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 01:59:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 01:59:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 01:59:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 01:59:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 01:59:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 01:59:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 01:59:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 01:59:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 01:59:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 01:59:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 01:59:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 01:59:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 01:59:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 01:59:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 01:59:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 01:59:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 01:59:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 01:59:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 01:59:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 01:59:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 01:59:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 01:59:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 01:59:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 01:59:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 01:59:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 01:59:20,974 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 01:59:20,974 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 01:59:20,974 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 01:59:20,974 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 01:59:20,974 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 01:59:20,974 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 01:59:20,974 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 01:59:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 01:59:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 01:59:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 01:59:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 01:59:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 01:59:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 01:59:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 01:59:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 01:59:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 01:59:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 01:59:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 01:59:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:59:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 01:59:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 01:59:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:59:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 01:59:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 01:59:20,978 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 01:59:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 01:59:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 01:59:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 01:59:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 01:59:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 01:59:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 01:59:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:59:20,979 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 01:59:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 01:59:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 01:59:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 01:59:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 01:59:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 01:59:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 01:59:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 01:59:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 01:59:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 01:59:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 01:59:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 01:59:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 01:59:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 01:59:20,982 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 01:59:20,982 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 01:59:20,982 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 01:59:20,982 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 01:59:20,982 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 01:59:20,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 01:59:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 01:59:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 01:59:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 01:59:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 01:59:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 01:59:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 01:59:20,983 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 01:59:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 01:59:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 01:59:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 01:59:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 01:59:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 01:59:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 01:59:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 01:59:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 01:59:20,984 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 01:59:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 01:59:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 01:59:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 01:59:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:59:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:59:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:59:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:59:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:59:20,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:59:20,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:59:20,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:59:20,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:59:20,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:59:20,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:59:21,789 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:59:21,789 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-15 01:59:21,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:59:21 BoogieIcfgContainer [2019-10-15 01:59:21,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:59:21,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:59:21,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:59:21,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:59:21,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:59:19" (1/3) ... [2019-10-15 01:59:21,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc71064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:59:21, skipping insertion in model container [2019-10-15 01:59:21,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:20" (2/3) ... [2019-10-15 01:59:21,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc71064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:59:21, skipping insertion in model container [2019-10-15 01:59:21,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:59:21" (3/3) ... [2019-10-15 01:59:21,798 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple.i [2019-10-15 01:59:21,808 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:59:21,816 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-10-15 01:59:21,828 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-10-15 01:59:21,853 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:59:21,854 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:59:21,854 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:59:21,854 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:59:21,854 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:59:21,855 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:59:21,855 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:59:21,855 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:59:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-15 01:59:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:59:21,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:21,876 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:21,878 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:21,884 INFO L82 PathProgramCache]: Analyzing trace with hash 824743736, now seen corresponding path program 1 times [2019-10-15 01:59:21,894 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:21,894 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477894749] [2019-10-15 01:59:21,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:21,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:21,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:22,063 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 01:59:22,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477894749] [2019-10-15 01:59:22,065 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:59:22,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:59:22,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419484050] [2019-10-15 01:59:22,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:59:22,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:59:22,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:59:22,087 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-10-15 01:59:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:59:22,108 INFO L93 Difference]: Finished difference Result 55 states and 83 transitions. [2019-10-15 01:59:22,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:59:22,109 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 01:59:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:59:22,118 INFO L225 Difference]: With dead ends: 55 [2019-10-15 01:59:22,118 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 01:59:22,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:59:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 01:59:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-15 01:59:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:59:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-15 01:59:22,155 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2019-10-15 01:59:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:59:22,155 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-15 01:59:22,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:59:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-15 01:59:22,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:59:22,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:22,156 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:22,157 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:22,157 INFO L82 PathProgramCache]: Analyzing trace with hash 184584870, now seen corresponding path program 1 times [2019-10-15 01:59:22,158 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:22,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601368843] [2019-10-15 01:59:22,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:22,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:22,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:22,284 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 01:59:22,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601368843] [2019-10-15 01:59:22,285 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:59:22,285 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:59:22,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457427614] [2019-10-15 01:59:22,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:59:22,287 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:22,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:59:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:59:22,290 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2019-10-15 01:59:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:59:22,506 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2019-10-15 01:59:22,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:59:22,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-15 01:59:22,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:59:22,508 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:59:22,508 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 01:59:22,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:59:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 01:59:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2019-10-15 01:59:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:59:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-15 01:59:22,516 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 12 [2019-10-15 01:59:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:59:22,517 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-15 01:59:22,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:59:22,517 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-15 01:59:22,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:59:22,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:22,518 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:22,518 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:22,519 INFO L82 PathProgramCache]: Analyzing trace with hash 184583620, now seen corresponding path program 1 times [2019-10-15 01:59:22,519 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:22,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365273962] [2019-10-15 01:59:22,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:22,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:22,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:22,583 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 01:59:22,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365273962] [2019-10-15 01:59:22,584 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:59:22,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:59:22,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240877701] [2019-10-15 01:59:22,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:59:22,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:22,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:59:22,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:59:22,586 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2019-10-15 01:59:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:59:22,681 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2019-10-15 01:59:22,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:59:22,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-15 01:59:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:59:22,683 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:59:22,683 INFO L226 Difference]: Without dead ends: 41 [2019-10-15 01:59:22,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:59:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-15 01:59:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2019-10-15 01:59:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:59:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2019-10-15 01:59:22,691 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 12 [2019-10-15 01:59:22,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:59:22,692 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2019-10-15 01:59:22,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:59:22,692 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2019-10-15 01:59:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:59:22,693 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:22,693 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:22,693 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:22,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:22,694 INFO L82 PathProgramCache]: Analyzing trace with hash 698560499, now seen corresponding path program 1 times [2019-10-15 01:59:22,694 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:22,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104424559] [2019-10-15 01:59:22,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:22,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:22,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:22,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104424559] [2019-10-15 01:59:22,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629930955] [2019-10-15 01:59:22,864 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 01:59:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:23,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 01:59:23,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:59:23,105 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-15 01:59:23,106 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:23,120 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:23,131 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:59:23,134 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2019-10-15 01:59:23,135 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:23,148 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:23,156 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:59:23,158 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2019-10-15 01:59:23,159 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:23,176 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:23,177 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:59:23,177 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:23 [2019-10-15 01:59:23,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:23,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:23,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:23,291 INFO L392 ElimStorePlain]: Different costs {0=[|#valid|], 1=[|v_#valid_28|]} [2019-10-15 01:59:23,309 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:59:23,310 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:23,326 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:59:23,326 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:23,618 WARN L191 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2019-10-15 01:59:23,619 INFO L567 ElimStorePlain]: treesize reduction 14, result has 92.1 percent of original size [2019-10-15 01:59:23,647 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:23,647 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-10-15 01:59:23,649 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:23,788 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-10-15 01:59:23,788 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:23,805 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_46|, |#memory_$Pointer$.offset|, v_prenex_1, |v_#memory_int_57|, v_prenex_2, |v_#memory_$Pointer$.offset_46|, |v_#memory_int_58|, v_prenex_4], 1=[|v_#memory_int_56|], 3=[v_prenex_3, v_prenex_5], 4=[|v_#memory_$Pointer$.offset_44|, |v_#memory_$Pointer$.base_44|]} [2019-10-15 01:59:23,805 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.base_46| vanished before elimination [2019-10-15 01:59:23,806 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-10-15 01:59:23,826 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-10-15 01:59:23,827 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:23,903 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:23,911 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:23,988 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:23,994 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,024 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:24,025 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_46| vanished before elimination [2019-10-15 01:59:24,035 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2019-10-15 01:59:24,036 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,067 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:24,074 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2019-10-15 01:59:24,074 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,095 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:24,102 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2019-10-15 01:59:24,102 INFO L496 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,122 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:24,130 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2019-10-15 01:59:24,130 INFO L496 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,145 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:24,151 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2019-10-15 01:59:24,151 INFO L496 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,167 INFO L567 ElimStorePlain]: treesize reduction 4, result has 84.6 percent of original size [2019-10-15 01:59:24,168 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_44| vanished before elimination [2019-10-15 01:59:24,168 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.base_44| vanished before elimination [2019-10-15 01:59:24,169 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 13 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,170 INFO L221 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:456, output treesize:23 [2019-10-15 01:59:24,203 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:24,204 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2019-10-15 01:59:24,205 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,221 INFO L567 ElimStorePlain]: treesize reduction 4, result has 69.2 percent of original size [2019-10-15 01:59:24,221 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,221 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:4 [2019-10-15 01:59:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:24,224 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:59:24,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:24,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:24,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:59:24,262 INFO L392 ElimStorePlain]: Different costs {0=[v_prenex_8, |v_#memory_$Pointer$.offset_48|, |v_#memory_int_57|, |#memory_int|], 2=[|v_#memory_$Pointer$.base_49|, |v_#memory_int_56|, v_prenex_6], 6=[v_prenex_9, v_prenex_7], 14=[|v_#memory_$Pointer$.offset_44|, |v_#memory_$Pointer$.base_44|]} [2019-10-15 01:59:24,279 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,302 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:24,791 WARN L191 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-10-15 01:59:24,792 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:24,806 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:25,078 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2019-10-15 01:59:25,078 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:25,086 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:25,341 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-10-15 01:59:25,341 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:25,361 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-15 01:59:25,371 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:25,371 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 119 [2019-10-15 01:59:25,372 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:25,627 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-10-15 01:59:25,627 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:25,635 INFO L496 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:25,800 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 01:59:25,801 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:25,812 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 105 [2019-10-15 01:59:25,813 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-10-15 01:59:25,939 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-10-15 01:59:25,939 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:25,945 INFO L496 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:25,949 INFO L496 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:26,074 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-15 01:59:26,075 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:26,081 INFO L496 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:26,087 INFO L496 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:26,177 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:26,181 INFO L496 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:26,186 INFO L496 ElimStorePlain]: Start of recursive call 14: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:26,246 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:26,261 INFO L496 ElimStorePlain]: Start of recursive call 15: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:26,311 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:26,316 INFO L496 ElimStorePlain]: Start of recursive call 16: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:59:26,360 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:59:26,362 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 11 dim-2 vars, End of recursive call: 10 dim-0 vars, and 3 xjuncts. [2019-10-15 01:59:26,362 INFO L221 ElimStorePlain]: Needed 16 recursive calls to eliminate 12 variables, input treesize:454, output treesize:238 [2019-10-15 01:59:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:59:26,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176366727] [2019-10-15 01:59:26,630 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:59:26,631 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:59:26,637 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:59:26,646 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:59:26,647 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:59:26,762 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:59:27,383 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 911 [2019-10-15 01:59:29,644 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 915 [2019-10-15 01:59:29,792 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 909 [2019-10-15 01:59:29,985 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 910 [2019-10-15 01:59:32,261 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 908 [2019-10-15 01:59:32,420 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 902 [2019-10-15 01:59:32,581 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 896 [2019-10-15 01:59:33,095 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 879 [2019-10-15 01:59:52,149 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:59:52,154 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:59:52,322 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2019-10-15 01:59:52,991 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:59:52,991 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 10] total 20 [2019-10-15 01:59:52,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507661492] [2019-10-15 01:59:52,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-15 01:59:52,994 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:52,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-15 01:59:52,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-10-15 01:59:52,995 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 20 states. [2019-10-15 01:59:53,384 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 126 [2019-10-15 01:59:53,803 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 124 [2019-10-15 01:59:54,515 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 68