java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/list-properties/alternating_list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:58:42,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:58:42,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:58:42,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 02:58:42,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 02:58:42,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 02:58:42,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 02:58:42,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 02:58:42,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 02:58:42,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 02:58:42,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 02:58:42,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 02:58:42,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 02:58:42,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 02:58:42,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 02:58:42,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 02:58:42,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 02:58:42,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 02:58:42,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 02:58:42,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 02:58:42,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 02:58:42,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 02:58:42,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 02:58:42,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 02:58:42,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 02:58:42,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 02:58:42,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 02:58:42,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 02:58:42,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 02:58:42,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 02:58:42,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 02:58:42,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 02:58:42,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 02:58:42,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 02:58:42,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 02:58:42,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 02:58:42,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 02:58:42,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 02:58:42,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:58:42,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:58:42,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:58:42,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 02:58:42,901 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:58:42,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:58:42,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:58:42,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:58:42,903 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:58:42,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:58:42,904 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:58:42,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:58:42,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:58:42,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:58:42,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:58:42,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:58:42,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:58:42,905 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:58:42,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:58:42,905 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:58:42,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:58:42,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:58:42,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:58:42,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:58:42,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:58:42,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:58:42,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:58:42,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:58:42,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:58:42,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:58:42,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:58:42,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:58:42,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 02:58:43,183 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:58:43,194 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:58:43,197 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:58:43,198 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:58:43,199 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:58:43,200 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-1.i [2019-10-15 02:58:43,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf089815/4956aaa2eafc40bea160b334261e0a22/FLAGfcce2c9f5 [2019-10-15 02:58:43,788 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:58:43,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/alternating_list-1.i [2019-10-15 02:58:43,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf089815/4956aaa2eafc40bea160b334261e0a22/FLAGfcce2c9f5 [2019-10-15 02:58:44,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf089815/4956aaa2eafc40bea160b334261e0a22 [2019-10-15 02:58:44,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:58:44,124 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:58:44,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:58:44,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:58:44,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:58:44,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:58:44" (1/1) ... [2019-10-15 02:58:44,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321e043c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44, skipping insertion in model container [2019-10-15 02:58:44,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:58:44" (1/1) ... [2019-10-15 02:58:44,139 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:58:44,192 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:58:44,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:58:44,702 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:58:44,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:58:44,813 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:58:44,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44 WrapperNode [2019-10-15 02:58:44,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:58:44,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:58:44,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:58:44,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:58:44,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44" (1/1) ... [2019-10-15 02:58:44,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44" (1/1) ... [2019-10-15 02:58:44,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44" (1/1) ... [2019-10-15 02:58:44,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44" (1/1) ... [2019-10-15 02:58:44,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44" (1/1) ... [2019-10-15 02:58:44,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44" (1/1) ... [2019-10-15 02:58:44,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44" (1/1) ... [2019-10-15 02:58:44,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:58:44,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:58:44,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:58:44,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:58:44,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:58:44,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:58:44,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:58:44,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-15 02:58:44,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-15 02:58:44,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-15 02:58:44,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-15 02:58:44,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-15 02:58:44,989 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-15 02:58:44,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:58:44,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:58:44,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 02:58:44,990 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 02:58:44,990 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 02:58:44,990 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 02:58:44,990 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 02:58:44,991 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 02:58:44,991 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 02:58:44,991 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 02:58:44,991 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 02:58:44,991 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 02:58:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 02:58:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 02:58:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 02:58:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 02:58:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 02:58:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 02:58:44,993 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 02:58:44,993 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-15 02:58:44,993 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-15 02:58:44,993 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-15 02:58:44,993 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-15 02:58:44,993 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-15 02:58:44,994 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 02:58:44,994 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 02:58:44,994 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 02:58:44,994 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 02:58:44,994 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 02:58:44,994 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 02:58:44,995 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 02:58:44,995 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 02:58:44,995 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 02:58:44,995 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 02:58:44,995 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 02:58:44,995 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 02:58:44,995 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 02:58:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 02:58:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 02:58:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 02:58:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 02:58:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 02:58:44,996 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 02:58:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 02:58:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 02:58:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 02:58:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 02:58:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 02:58:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 02:58:44,997 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 02:58:44,998 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 02:58:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 02:58:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 02:58:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 02:58:45,000 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 02:58:45,000 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 02:58:45,000 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 02:58:45,000 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 02:58:45,000 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 02:58:45,000 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 02:58:45,001 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 02:58:45,001 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 02:58:45,001 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 02:58:45,001 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 02:58:45,001 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 02:58:45,001 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 02:58:45,002 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 02:58:45,002 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 02:58:45,002 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 02:58:45,002 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 02:58:45,002 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 02:58:45,002 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 02:58:45,003 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 02:58:45,003 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 02:58:45,003 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 02:58:45,003 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 02:58:45,003 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 02:58:45,003 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 02:58:45,003 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 02:58:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 02:58:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 02:58:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 02:58:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 02:58:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 02:58:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 02:58:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 02:58:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 02:58:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 02:58:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 02:58:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 02:58:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 02:58:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 02:58:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 02:58:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 02:58:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 02:58:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 02:58:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 02:58:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 02:58:45,006 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 02:58:45,007 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 02:58:45,007 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 02:58:45,007 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 02:58:45,007 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 02:58:45,007 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 02:58:45,007 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 02:58:45,007 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 02:58:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 02:58:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 02:58:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 02:58:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 02:58:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-15 02:58:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:58:45,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 02:58:45,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 02:58:45,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 02:58:45,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 02:58:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 02:58:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 02:58:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:58:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:58:45,382 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-15 02:58:45,611 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:58:45,611 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 02:58:45,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:58:45 BoogieIcfgContainer [2019-10-15 02:58:45,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:58:45,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:58:45,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:58:45,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:58:45,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:58:44" (1/3) ... [2019-10-15 02:58:45,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ce5e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:58:45, skipping insertion in model container [2019-10-15 02:58:45,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:58:44" (2/3) ... [2019-10-15 02:58:45,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ce5e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:58:45, skipping insertion in model container [2019-10-15 02:58:45,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:58:45" (3/3) ... [2019-10-15 02:58:45,621 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-1.i [2019-10-15 02:58:45,630 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:58:45,638 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:58:45,650 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:58:45,674 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:58:45,675 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:58:45,675 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:58:45,677 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:58:45,677 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:58:45,677 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:58:45,678 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:58:45,678 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:58:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-15 02:58:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 02:58:45,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:45,705 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:45,707 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:45,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:45,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1233015501, now seen corresponding path program 1 times [2019-10-15 02:58:45,723 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:45,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367072203] [2019-10-15 02:58:45,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:45,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:45,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:45,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367072203] [2019-10-15 02:58:45,913 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:45,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 02:58:45,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529233594] [2019-10-15 02:58:45,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 02:58:45,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:45,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 02:58:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:58:45,937 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-15 02:58:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:45,960 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2019-10-15 02:58:45,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 02:58:45,962 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-10-15 02:58:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:45,970 INFO L225 Difference]: With dead ends: 49 [2019-10-15 02:58:45,970 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 02:58:45,974 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 02:58:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 02:58:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 02:58:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 02:58:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-15 02:58:46,011 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-10-15 02:58:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:46,011 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-15 02:58:46,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 02:58:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-15 02:58:46,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 02:58:46,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:46,013 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:46,013 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:46,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:46,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1724119726, now seen corresponding path program 1 times [2019-10-15 02:58:46,014 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:46,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535348298] [2019-10-15 02:58:46,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:46,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:46,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:46,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535348298] [2019-10-15 02:58:46,088 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:46,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 02:58:46,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859944527] [2019-10-15 02:58:46,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 02:58:46,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:46,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 02:58:46,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:58:46,091 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2019-10-15 02:58:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:46,140 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2019-10-15 02:58:46,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 02:58:46,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-15 02:58:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:46,142 INFO L225 Difference]: With dead ends: 37 [2019-10-15 02:58:46,142 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 02:58:46,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:58:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 02:58:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-10-15 02:58:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 02:58:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-15 02:58:46,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-10-15 02:58:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:46,154 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-15 02:58:46,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 02:58:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-15 02:58:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 02:58:46,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:46,155 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:46,156 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:46,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1724126670, now seen corresponding path program 1 times [2019-10-15 02:58:46,157 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:46,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63418737] [2019-10-15 02:58:46,157 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:46,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:46,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:46,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63418737] [2019-10-15 02:58:46,257 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:58:46,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:58:46,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390745882] [2019-10-15 02:58:46,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:58:46,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:46,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:58:46,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:58:46,259 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 5 states. [2019-10-15 02:58:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:46,350 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-10-15 02:58:46,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:58:46,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-10-15 02:58:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:46,351 INFO L225 Difference]: With dead ends: 50 [2019-10-15 02:58:46,351 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 02:58:46,352 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 02:58:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 02:58:46,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2019-10-15 02:58:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 02:58:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-10-15 02:58:46,357 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2019-10-15 02:58:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:46,358 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-10-15 02:58:46,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:58:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-10-15 02:58:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 02:58:46,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:46,359 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:46,359 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:46,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1627587372, now seen corresponding path program 1 times [2019-10-15 02:58:46,360 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:46,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145860695] [2019-10-15 02:58:46,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:46,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:46,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:46,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145860695] [2019-10-15 02:58:46,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182436221] [2019-10-15 02:58:46,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:46,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 02:58:46,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:46,711 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 02:58:46,712 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:46,727 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:46,727 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:58:46,728 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-10-15 02:58:46,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:46,809 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:46,810 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 02:58:46,810 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:46,829 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:46,840 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:46,853 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:46,853 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_21| vanished before elimination [2019-10-15 02:58:46,861 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-10-15 02:58:46,862 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:46,877 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:46,882 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 1 [2019-10-15 02:58:46,883 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:46,892 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:46,892 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:58:46,893 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:58, output treesize:18 [2019-10-15 02:58:46,928 INFO L341 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2019-10-15 02:58:46,928 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2019-10-15 02:58:46,929 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:46,934 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:46,935 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:58:46,935 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2019-10-15 02:58:46,961 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 19 treesize of output 18 [2019-10-15 02:58:46,962 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:46,976 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:46,977 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-15 02:58:46,978 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2019-10-15 02:58:47,020 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 10 [2019-10-15 02:58:47,021 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,028 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:47,029 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,030 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2019-10-15 02:58:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:47,034 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:58:47,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,104 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 02:58:47,108 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,117 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:47,118 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-15 02:58:47,118 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:54, output treesize:22 [2019-10-15 02:58:47,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,177 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_25|, |#memory_$Pointer$.base|, |#memory_$Pointer$.offset|, v_prenex_1, |v_#memory_$Pointer$.offset_24|, v_prenex_4, v_prenex_6, v_prenex_7], 2=[v_prenex_3, |#memory_int|]} [2019-10-15 02:58:47,187 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,195 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,278 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:47,278 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.base| vanished before elimination [2019-10-15 02:58:47,292 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2019-10-15 02:58:47,293 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,303 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-10-15 02:58:47,304 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,439 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2019-10-15 02:58:47,440 INFO L567 ElimStorePlain]: treesize reduction 3, result has 98.0 percent of original size [2019-10-15 02:58:47,446 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,453 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,495 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:58:47,495 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_24| vanished before elimination [2019-10-15 02:58:47,496 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-10-15 02:58:47,502 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 6 [2019-10-15 02:58:47,503 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,513 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 46 treesize of output 30 [2019-10-15 02:58:47,514 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,563 INFO L567 ElimStorePlain]: treesize reduction 11, result has 86.1 percent of original size [2019-10-15 02:58:47,563 INFO L464 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2019-10-15 02:58:47,575 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 173 treesize of output 165 [2019-10-15 02:58:47,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 02:58:47,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,581 INFO L496 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,780 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2019-10-15 02:58:47,780 INFO L567 ElimStorePlain]: treesize reduction 252, result has 23.2 percent of original size [2019-10-15 02:58:47,797 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 156 treesize of output 148 [2019-10-15 02:58:47,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 02:58:47,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 02:58:47,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:58:47,803 INFO L496 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-10-15 02:58:47,913 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-10-15 02:58:47,913 INFO L567 ElimStorePlain]: treesize reduction 234, result has 22.8 percent of original size [2019-10-15 02:58:47,916 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 10 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2019-10-15 02:58:47,916 INFO L221 ElimStorePlain]: Needed 11 recursive calls to eliminate 14 variables, input treesize:211, output treesize:48 [2019-10-15 02:58:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:48,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555103466] [2019-10-15 02:58:48,091 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 02:58:48,091 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:58:48,098 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:58:48,105 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:58:48,106 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:58:48,233 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 02:58:49,615 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 02:58:49,620 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:58:50,072 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:58:50,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 9] total 24 [2019-10-15 02:58:50,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106198147] [2019-10-15 02:58:50,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 02:58:50,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:58:50,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 02:58:50,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2019-10-15 02:58:50,078 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 24 states. [2019-10-15 02:58:50,339 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2019-10-15 02:58:50,502 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-10-15 02:58:51,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:58:51,272 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-10-15 02:58:51,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 02:58:51,273 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 19 [2019-10-15 02:58:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:58:51,275 INFO L225 Difference]: With dead ends: 42 [2019-10-15 02:58:51,275 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 02:58:51,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 02:58:51,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 02:58:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-10-15 02:58:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-15 02:58:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-15 02:58:51,293 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2019-10-15 02:58:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:58:51,294 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-15 02:58:51,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 02:58:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-15 02:58:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 02:58:51,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:58:51,295 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:58:51,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:51,500 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:58:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:58:51,500 INFO L82 PathProgramCache]: Analyzing trace with hash -489689482, now seen corresponding path program 2 times [2019-10-15 02:58:51,501 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:58:51,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154207197] [2019-10-15 02:58:51,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:51,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:58:51,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:58:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:58:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:51,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154207197] [2019-10-15 02:58:51,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239965965] [2019-10-15 02:58:51,781 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:58:51,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 02:58:51,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 02:58:51,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 41 conjunts are in the unsatisfiable core [2019-10-15 02:58:51,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:58:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:58:52,543 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:59:06,561 WARN L191 SmtUtils]: Spent 10.18 s on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2019-10-15 02:59:15,108 WARN L191 SmtUtils]: Spent 8.30 s on a formula simplification that was a NOOP. DAG size: 58 [2019-10-15 02:59:15,464 WARN L191 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2019-10-15 02:59:15,927 WARN L191 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-15 02:59:16,106 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2019-10-15 02:59:16,456 WARN L191 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2019-10-15 02:59:16,741 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2019-10-15 02:59:16,873 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 93