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/dll-circular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:58:15,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:58:15,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:58:15,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:58:15,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:58:15,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:58:15,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:58:15,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:58:15,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:58:15,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:58:15,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:58:15,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:58:15,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:58:15,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:58:15,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:58:15,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:58:15,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:58:15,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:58:15,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:58:15,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:58:15,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:58:15,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:58:15,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:58:15,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:58:15,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:58:15,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:58:15,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:58:15,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:58:15,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:58:15,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:58:15,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:58:15,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:58:15,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:58:15,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:58:15,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:58:15,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:58:15,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:58:15,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:58:15,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:58:15,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:58:15,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:58:16,001 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 01:58:16,022 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:58:16,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:58:16,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:58:16,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:58:16,025 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:58:16,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:58:16,025 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:58:16,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:58:16,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:58:16,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:58:16,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:58:16,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:58:16,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:58:16,028 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:58:16,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:58:16,028 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:58:16,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:58:16,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:58:16,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:58:16,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:58:16,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:58:16,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:58:16,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:58:16,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:58:16,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:58:16,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:58:16,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:58:16,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:58:16,031 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 01:58:16,272 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:58:16,286 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:58:16,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:58:16,293 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:58:16,293 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:58:16,294 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-circular-2.i [2019-10-15 01:58:16,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd3ff580/0d2366311e034aba8a4dd84fba59e57c/FLAGf7a5e3514 [2019-10-15 01:58:16,896 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:58:16,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-2.i [2019-10-15 01:58:16,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd3ff580/0d2366311e034aba8a4dd84fba59e57c/FLAGf7a5e3514 [2019-10-15 01:58:17,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd3ff580/0d2366311e034aba8a4dd84fba59e57c [2019-10-15 01:58:17,258 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:58:17,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:58:17,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:58:17,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:58:17,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:58:17,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:58:17" (1/1) ... [2019-10-15 01:58:17,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a0daa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17, skipping insertion in model container [2019-10-15 01:58:17,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:58:17" (1/1) ... [2019-10-15 01:58:17,274 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:58:17,312 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:58:17,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:58:17,758 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:58:17,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:58:17,870 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:58:17,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17 WrapperNode [2019-10-15 01:58:17,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:58:17,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:58:17,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:58:17,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:58:17,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17" (1/1) ... [2019-10-15 01:58:17,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17" (1/1) ... [2019-10-15 01:58:17,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17" (1/1) ... [2019-10-15 01:58:17,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17" (1/1) ... [2019-10-15 01:58:17,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17" (1/1) ... [2019-10-15 01:58:17,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17" (1/1) ... [2019-10-15 01:58:17,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17" (1/1) ... [2019-10-15 01:58:17,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:58:17,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:58:17,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:58:17,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:58:17,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17" (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 01:58:17,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:58:18,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:58:18,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:58:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 01:58:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 01:58:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 01:58:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 01:58:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 01:58:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 01:58:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 01:58:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 01:58:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 01:58:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 01:58:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 01:58:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 01:58:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 01:58:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 01:58:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 01:58:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 01:58:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 01:58:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 01:58:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 01:58:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 01:58:18,003 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 01:58:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 01:58:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 01:58:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 01:58:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 01:58:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 01:58:18,004 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 01:58:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 01:58:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 01:58:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 01:58:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 01:58:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 01:58:18,005 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 01:58:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 01:58:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 01:58:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 01:58:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 01:58:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 01:58:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 01:58:18,006 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 01:58:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 01:58:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 01:58:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 01:58:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 01:58:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 01:58:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 01:58:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 01:58:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 01:58:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 01:58:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 01:58:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:58:18,008 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 01:58:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 01:58:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:58:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 01:58:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 01:58:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 01:58:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 01:58:18,009 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 01:58:18,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 01:58:18,010 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 01:58:18,010 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 01:58:18,010 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 01:58:18,010 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:58:18,010 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 01:58:18,011 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 01:58:18,011 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 01:58:18,011 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 01:58:18,011 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 01:58:18,011 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 01:58:18,011 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 01:58:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 01:58:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 01:58:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 01:58:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 01:58:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 01:58:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 01:58:18,012 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 01:58:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 01:58:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 01:58:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 01:58:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 01:58:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 01:58:18,013 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 01:58:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 01:58:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 01:58:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 01:58:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 01:58:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 01:58:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 01:58:18,014 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 01:58:18,015 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 01:58:18,015 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 01:58:18,015 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 01:58:18,015 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 01:58:18,015 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 01:58:18,016 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 01:58:18,016 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 01:58:18,016 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 01:58:18,016 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 01:58:18,016 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 01:58:18,016 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 01:58:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 01:58:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:58:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:58:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:58:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:58:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:58:18,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:58:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:58:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:58:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:58:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:58:18,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:58:18,590 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:58:18,590 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 01:58:18,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:58:18 BoogieIcfgContainer [2019-10-15 01:58:18,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:58:18,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:58:18,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:58:18,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:58:18,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:58:17" (1/3) ... [2019-10-15 01:58:18,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b1c344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:58:18, skipping insertion in model container [2019-10-15 01:58:18,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:17" (2/3) ... [2019-10-15 01:58:18,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b1c344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:58:18, skipping insertion in model container [2019-10-15 01:58:18,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:58:18" (3/3) ... [2019-10-15 01:58:18,599 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-circular-2.i [2019-10-15 01:58:18,608 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:58:18,616 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-10-15 01:58:18,627 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-10-15 01:58:18,650 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:58:18,650 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:58:18,650 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:58:18,650 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:58:18,652 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:58:18,652 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:58:18,652 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:58:18,653 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:58:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-10-15 01:58:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-15 01:58:18,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:18,692 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:18,696 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash 749315359, now seen corresponding path program 1 times [2019-10-15 01:58:18,710 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:18,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194509034] [2019-10-15 01:58:18,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:18,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:18,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:18,845 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 01:58:18,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194509034] [2019-10-15 01:58:18,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:18,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:58:18,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112152007] [2019-10-15 01:58:18,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:58:18,853 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:18,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:58:18,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:58:18,869 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2019-10-15 01:58:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:18,890 INFO L93 Difference]: Finished difference Result 65 states and 99 transitions. [2019-10-15 01:58:18,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:58:18,891 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-15 01:58:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:18,899 INFO L225 Difference]: With dead ends: 65 [2019-10-15 01:58:18,899 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:58:18,903 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 01:58:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:58:18,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-15 01:58:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:58:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-15 01:58:18,938 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2019-10-15 01:58:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:18,939 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-15 01:58:18,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:58:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-15 01:58:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:58:18,940 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:18,940 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:18,940 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1712971286, now seen corresponding path program 1 times [2019-10-15 01:58:18,941 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:18,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194170904] [2019-10-15 01:58:18,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:18,942 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:18,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:19,087 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 01:58:19,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194170904] [2019-10-15 01:58:19,087 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:19,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:58:19,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030797740] [2019-10-15 01:58:19,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:58:19,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:19,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:58:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:58:19,108 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2019-10-15 01:58:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:19,183 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-15 01:58:19,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:58:19,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-10-15 01:58:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:19,185 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:58:19,185 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:58:19,186 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 01:58:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:58:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2019-10-15 01:58:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:58:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-15 01:58:19,193 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2019-10-15 01:58:19,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:19,193 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-15 01:58:19,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:58:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-15 01:58:19,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:58:19,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:19,195 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:19,195 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:19,195 INFO L82 PathProgramCache]: Analyzing trace with hash -994155934, now seen corresponding path program 1 times [2019-10-15 01:58:19,196 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:19,196 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282553139] [2019-10-15 01:58:19,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:19,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:19,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:19,260 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 01:58:19,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282553139] [2019-10-15 01:58:19,260 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:19,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:58:19,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263701634] [2019-10-15 01:58:19,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:58:19,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:58:19,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:58:19,263 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 3 states. [2019-10-15 01:58:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:19,287 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-15 01:58:19,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:58:19,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:58:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:19,290 INFO L225 Difference]: With dead ends: 71 [2019-10-15 01:58:19,290 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:58:19,291 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 01:58:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:58:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2019-10-15 01:58:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:58:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-10-15 01:58:19,299 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 13 [2019-10-15 01:58:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:19,299 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-10-15 01:58:19,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:58:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-10-15 01:58:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:58:19,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:19,300 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:19,301 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:19,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1588532202, now seen corresponding path program 1 times [2019-10-15 01:58:19,301 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:19,301 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391042984] [2019-10-15 01:58:19,302 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:19,302 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:19,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:19,549 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 01:58:19,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391042984] [2019-10-15 01:58:19,550 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:19,550 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:58:19,550 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400997320] [2019-10-15 01:58:19,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:58:19,551 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:19,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:58:19,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:58:19,552 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 5 states. [2019-10-15 01:58:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:19,763 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-10-15 01:58:19,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:58:19,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-10-15 01:58:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:19,765 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:58:19,765 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 01:58:19,767 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:58:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 01:58:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-15 01:58:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-15 01:58:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-10-15 01:58:19,776 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2019-10-15 01:58:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:19,777 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-10-15 01:58:19,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:58:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-10-15 01:58:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:58:19,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:19,779 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:19,780 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:19,781 INFO L82 PathProgramCache]: Analyzing trace with hash -428681333, now seen corresponding path program 1 times [2019-10-15 01:58:19,781 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:19,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144048307] [2019-10-15 01:58:19,782 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:19,782 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:19,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:19,906 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 01:58:19,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144048307] [2019-10-15 01:58:19,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700746576] [2019-10-15 01:58:19,907 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 01:58:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:20,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-15 01:58:20,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:58:20,123 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 01:58:20,124 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:58:20,136 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:20,137 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:58:20,137 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-15 01:58:20,173 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:20,173 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 01:58:20,175 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:58:20,190 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:20,196 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:58:20,257 INFO L341 Elim1Store]: treesize reduction 30, result has 57.7 percent of original size [2019-10-15 01:58:20,257 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 2 case distinctions, treesize of input 67 treesize of output 51 [2019-10-15 01:58:20,258 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:58:20,294 INFO L567 ElimStorePlain]: treesize reduction 24, result has 59.3 percent of original size [2019-10-15 01:58:20,296 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:58:20,296 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:111, output treesize:32 [2019-10-15 01:58:22,341 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-15 01:58:22,392 INFO L341 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2019-10-15 01:58:22,393 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2019-10-15 01:58:22,394 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:58:22,411 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:22,412 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 01:58:22,412 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:23 [2019-10-15 01:58:24,446 INFO L392 ElimStorePlain]: Different costs {2=[|#memory_$Pointer$.base|], 6=[|v_#memory_$Pointer$.base_24|]} [2019-10-15 01:58:24,452 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 01:58:24,487 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:24,502 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:24,503 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 68 treesize of output 55 [2019-10-15 01:58:24,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,507 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:58:24,520 INFO L567 ElimStorePlain]: treesize reduction 23, result has 28.1 percent of original size [2019-10-15 01:58:24,521 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:58:24,521 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:66, output treesize:4 [2019-10-15 01:58:24,523 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 01:58:24,524 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:58:24,534 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 01:58:24,537 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:24,537 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:58:24,538 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2019-10-15 01:58:24,557 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:58:24,559 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:24,560 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:58:24,560 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2019-10-15 01:58:24,573 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 1861 treesize of output 1853 [2019-10-15 01:58:24,577 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-15 01:58:24,962 WARN L191 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 43 [2019-10-15 01:58:24,963 INFO L567 ElimStorePlain]: treesize reduction 1774, result has 4.2 percent of original size [2019-10-15 01:58:24,964 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-15 01:58:24,965 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:143, output treesize:75 [2019-10-15 01:58:24,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:24,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:25,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:25,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:25,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:25,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:25,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:25,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:25,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:58:25,047 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 01:58:25,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756655069] [2019-10-15 01:58:25,071 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:58:25,071 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:58:25,077 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:58:25,084 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:58:25,085 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:58:25,179 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:58:50,595 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:58:50,601 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:58:50,987 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:58:50,987 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5, 9] total 17 [2019-10-15 01:58:50,987 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824065652] [2019-10-15 01:58:50,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:58:50,989 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:58:50,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2019-10-15 01:58:50,990 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 17 states. [2019-10-15 01:58:53,310 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 32