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-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:58:52,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:58:52,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:58:52,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:58:52,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:58:52,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:58:52,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:58:52,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:58:52,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:58:52,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:58:52,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:58:52,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:58:52,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:58:52,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:58:52,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:58:52,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:58:52,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:58:52,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:58:52,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:58:52,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:58:52,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:58:52,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:58:52,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:58:52,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:58:52,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:58:52,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:58:52,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:58:52,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:58:52,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:58:52,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:58:52,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:58:52,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:58:52,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:58:52,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:58:52,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:58:52,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:58:52,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:58:52,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:58:52,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:58:52,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:58:52,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:58:52,779 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 01:58:52,814 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:58:52,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:58:52,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:58:52,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:58:52,816 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:58:52,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:58:52,816 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:58:52,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:58:52,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:58:52,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:58:52,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:58:52,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:58:52,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:58:52,821 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:58:52,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:58:52,821 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:58:52,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:58:52,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:58:52,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:58:52,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:58:52,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:58:52,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:58:52,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:58:52,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:58:52,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:58:52,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:58:52,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:58:52,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:58:52,825 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 01:58:53,082 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:58:53,098 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:58:53,101 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:58:53,103 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:58:53,103 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:58:53,104 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-2.i [2019-10-15 01:58:53,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5996cbac2/079032ba1d174882bcfe4712b150b236/FLAGeb32b8bbd [2019-10-15 01:58:53,712 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:58:53,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-2.i [2019-10-15 01:58:53,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5996cbac2/079032ba1d174882bcfe4712b150b236/FLAGeb32b8bbd [2019-10-15 01:58:53,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5996cbac2/079032ba1d174882bcfe4712b150b236 [2019-10-15 01:58:54,001 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:58:54,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:58:54,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:58:54,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:58:54,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:58:54,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:58:53" (1/1) ... [2019-10-15 01:58:54,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4caf3c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54, skipping insertion in model container [2019-10-15 01:58:54,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:58:53" (1/1) ... [2019-10-15 01:58:54,020 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:58:54,063 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:58:54,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:58:54,515 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:58:54,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:58:54,622 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:58:54,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54 WrapperNode [2019-10-15 01:58:54,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:58:54,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:58:54,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:58:54,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:58:54,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54" (1/1) ... [2019-10-15 01:58:54,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54" (1/1) ... [2019-10-15 01:58:54,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54" (1/1) ... [2019-10-15 01:58:54,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54" (1/1) ... [2019-10-15 01:58:54,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54" (1/1) ... [2019-10-15 01:58:54,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54" (1/1) ... [2019-10-15 01:58:54,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54" (1/1) ... [2019-10-15 01:58:54,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:58:54,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:58:54,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:58:54,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:58:54,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54" (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 01:58:54,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:58:54,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:58:54,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:58:54,777 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-15 01:58:54,777 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-15 01:58:54,778 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-15 01:58:54,778 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-15 01:58:54,778 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-15 01:58:54,778 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-15 01:58:54,778 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-15 01:58:54,778 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-15 01:58:54,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-15 01:58:54,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-15 01:58:54,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-15 01:58:54,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-15 01:58:54,779 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-15 01:58:54,780 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-15 01:58:54,780 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-15 01:58:54,780 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-15 01:58:54,780 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-15 01:58:54,780 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-15 01:58:54,780 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-15 01:58:54,781 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-15 01:58:54,781 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-15 01:58:54,781 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-15 01:58:54,781 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-15 01:58:54,781 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-15 01:58:54,781 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-15 01:58:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-15 01:58:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-15 01:58:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-15 01:58:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-15 01:58:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-15 01:58:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-15 01:58:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-15 01:58:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-15 01:58:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-15 01:58:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-15 01:58:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-15 01:58:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-15 01:58:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-15 01:58:54,784 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-15 01:58:54,784 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-15 01:58:54,784 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-15 01:58:54,784 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-15 01:58:54,784 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-15 01:58:54,784 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-15 01:58:54,784 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-15 01:58:54,785 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-15 01:58:54,785 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-15 01:58:54,785 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-15 01:58:54,785 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-15 01:58:54,785 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-15 01:58:54,785 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:58:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 01:58:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-15 01:58:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:58:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-15 01:58:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-15 01:58:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-15 01:58:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-15 01:58:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-15 01:58:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-15 01:58:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-15 01:58:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-15 01:58:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-15 01:58:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:58:54,788 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-15 01:58:54,788 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-15 01:58:54,788 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-15 01:58:54,788 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-15 01:58:54,788 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-15 01:58:54,788 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-15 01:58:54,789 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-15 01:58:54,789 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-15 01:58:54,789 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-15 01:58:54,789 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-15 01:58:54,789 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-15 01:58:54,789 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-15 01:58:54,790 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-15 01:58:54,790 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-15 01:58:54,790 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-15 01:58:54,790 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-15 01:58:54,790 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-15 01:58:54,790 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-15 01:58:54,790 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-15 01:58:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-15 01:58:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-15 01:58:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-15 01:58:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-15 01:58:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-15 01:58:54,791 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-15 01:58:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-15 01:58:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-15 01:58:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-15 01:58:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-15 01:58:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-15 01:58:54,792 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-15 01:58:54,793 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-15 01:58:54,793 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-15 01:58:54,793 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-15 01:58:54,793 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-15 01:58:54,793 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-15 01:58:54,793 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-15 01:58:54,793 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-15 01:58:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-15 01:58:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:58:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:58:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:58:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:58:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:58:54,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:58:54,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:58:54,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:58:54,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:58:54,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:58:54,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:58:55,638 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:58:55,638 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-10-15 01:58:55,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:58:55 BoogieIcfgContainer [2019-10-15 01:58:55,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:58:55,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:58:55,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:58:55,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:58:55,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:58:53" (1/3) ... [2019-10-15 01:58:55,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91e19ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:58:55, skipping insertion in model container [2019-10-15 01:58:55,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:58:54" (2/3) ... [2019-10-15 01:58:55,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91e19ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:58:55, skipping insertion in model container [2019-10-15 01:58:55,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:58:55" (3/3) ... [2019-10-15 01:58:55,649 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-2.i [2019-10-15 01:58:55,659 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:58:55,667 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-10-15 01:58:55,679 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-10-15 01:58:55,704 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:58:55,705 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:58:55,705 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:58:55,705 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:58:55,705 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:58:55,706 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:58:55,706 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:58:55,706 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:58:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2019-10-15 01:58:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-15 01:58:55,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:55,729 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:55,732 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:55,738 INFO L82 PathProgramCache]: Analyzing trace with hash 299738079, now seen corresponding path program 1 times [2019-10-15 01:58:55,748 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:55,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322803307] [2019-10-15 01:58:55,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:55,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:55,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:55,931 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 01:58:55,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322803307] [2019-10-15 01:58:55,933 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:55,933 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:58:55,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442133882] [2019-10-15 01:58:55,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:58:55,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:55,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:58:55,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:58:55,958 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2019-10-15 01:58:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:55,993 INFO L93 Difference]: Finished difference Result 89 states and 139 transitions. [2019-10-15 01:58:55,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:58:55,994 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-15 01:58:55,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:56,010 INFO L225 Difference]: With dead ends: 89 [2019-10-15 01:58:56,011 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:58:56,017 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 01:58:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:58:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-15 01:58:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-15 01:58:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-10-15 01:58:56,058 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 9 [2019-10-15 01:58:56,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:56,058 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-10-15 01:58:56,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:58:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-10-15 01:58:56,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:58:56,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:56,059 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:56,060 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:56,060 INFO L82 PathProgramCache]: Analyzing trace with hash 644598331, now seen corresponding path program 1 times [2019-10-15 01:58:56,061 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:56,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196737598] [2019-10-15 01:58:56,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:56,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:56,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:56,309 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 01:58:56,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196737598] [2019-10-15 01:58:56,310 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:56,310 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:58:56,311 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060845799] [2019-10-15 01:58:56,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:58:56,313 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:56,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:58:56,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:58:56,313 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 4 states. [2019-10-15 01:58:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:56,645 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2019-10-15 01:58:56,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:58:56,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-10-15 01:58:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:56,647 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:58:56,647 INFO L226 Difference]: Without dead ends: 41 [2019-10-15 01:58:56,648 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 01:58:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-15 01:58:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-15 01:58:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-15 01:58:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-15 01:58:56,655 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 10 [2019-10-15 01:58:56,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:56,655 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-15 01:58:56,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:58:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-15 01:58:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:58:56,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:56,656 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:56,657 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:56,657 INFO L82 PathProgramCache]: Analyzing trace with hash 639051341, now seen corresponding path program 1 times [2019-10-15 01:58:56,657 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:56,658 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176337880] [2019-10-15 01:58:56,658 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:56,658 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:56,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:56,714 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 01:58:56,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176337880] [2019-10-15 01:58:56,715 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:56,717 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:58:56,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216614044] [2019-10-15 01:58:56,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:58:56,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:56,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:58:56,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:58:56,719 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2019-10-15 01:58:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:56,873 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2019-10-15 01:58:56,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:58:56,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-10-15 01:58:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:56,875 INFO L225 Difference]: With dead ends: 47 [2019-10-15 01:58:56,875 INFO L226 Difference]: Without dead ends: 45 [2019-10-15 01:58:56,875 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 01:58:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-15 01:58:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2019-10-15 01:58:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:58:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-10-15 01:58:56,886 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 10 [2019-10-15 01:58:56,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:56,887 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-10-15 01:58:56,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:58:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-10-15 01:58:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:58:56,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:56,888 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:56,889 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:56,889 INFO L82 PathProgramCache]: Analyzing trace with hash 434039850, now seen corresponding path program 1 times [2019-10-15 01:58:56,890 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:56,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063487565] [2019-10-15 01:58:56,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:56,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:56,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:57,044 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 01:58:57,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063487565] [2019-10-15 01:58:57,045 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:57,045 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:58:57,045 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054432440] [2019-10-15 01:58:57,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:58:57,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:58:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:58:57,046 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2019-10-15 01:58:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:57,247 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-10-15 01:58:57,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:58:57,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:58:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:57,249 INFO L225 Difference]: With dead ends: 39 [2019-10-15 01:58:57,249 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 01:58:57,250 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 01:58:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 01:58:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-15 01:58:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:58:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-10-15 01:58:57,255 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 13 [2019-10-15 01:58:57,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:57,255 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-10-15 01:58:57,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:58:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-10-15 01:58:57,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:58:57,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:57,256 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:57,256 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:57,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1607525391, now seen corresponding path program 1 times [2019-10-15 01:58:57,257 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:57,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229182933] [2019-10-15 01:58:57,257 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:57,257 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:57,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:57,402 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 01:58:57,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229182933] [2019-10-15 01:58:57,404 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:57,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:58:57,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159496559] [2019-10-15 01:58:57,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:58:57,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:57,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:58:57,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:58:57,406 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 6 states. [2019-10-15 01:58:57,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:57,861 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2019-10-15 01:58:57,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:58:57,862 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-10-15 01:58:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:57,863 INFO L225 Difference]: With dead ends: 62 [2019-10-15 01:58:57,863 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 01:58:57,864 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:58:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 01:58:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2019-10-15 01:58:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:58:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-10-15 01:58:57,871 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 13 [2019-10-15 01:58:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:57,872 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-10-15 01:58:57,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:58:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-10-15 01:58:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:58:57,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:57,873 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:57,874 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:57,874 INFO L82 PathProgramCache]: Analyzing trace with hash 500595918, now seen corresponding path program 1 times [2019-10-15 01:58:57,875 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:57,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473907912] [2019-10-15 01:58:57,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:57,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:57,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:57,982 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 01:58:57,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473907912] [2019-10-15 01:58:57,983 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:57,983 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:58:57,984 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407345037] [2019-10-15 01:58:57,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:58:57,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:57,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:58:57,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:58:57,985 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 4 states. [2019-10-15 01:58:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:58,110 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-10-15 01:58:58,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:58:58,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-15 01:58:58,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:58,113 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:58:58,113 INFO L226 Difference]: Without dead ends: 42 [2019-10-15 01:58:58,113 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 01:58:58,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-15 01:58:58,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-15 01:58:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-15 01:58:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-10-15 01:58:58,128 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2019-10-15 01:58:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:58,129 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-10-15 01:58:58,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:58:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-10-15 01:58:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:58:58,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:58,131 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:58,132 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:58,132 INFO L82 PathProgramCache]: Analyzing trace with hash -2116307816, now seen corresponding path program 1 times [2019-10-15 01:58:58,132 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:58,133 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262152894] [2019-10-15 01:58:58,133 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:58,133 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:58,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:58,229 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 01:58:58,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262152894] [2019-10-15 01:58:58,230 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:58:58,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:58:58,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882911915] [2019-10-15 01:58:58,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:58:58,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:58:58,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:58:58,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:58:58,231 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 5 states. [2019-10-15 01:58:58,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:58:58,388 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2019-10-15 01:58:58,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:58:58,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-15 01:58:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:58:58,389 INFO L225 Difference]: With dead ends: 57 [2019-10-15 01:58:58,389 INFO L226 Difference]: Without dead ends: 45 [2019-10-15 01:58:58,390 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:58:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-15 01:58:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-15 01:58:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:58:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-10-15 01:58:58,395 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 17 [2019-10-15 01:58:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:58:58,395 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-10-15 01:58:58,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:58:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-10-15 01:58:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:58:58,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:58:58,396 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:58:58,397 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:58:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:58:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash 17922409, now seen corresponding path program 1 times [2019-10-15 01:58:58,397 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:58:58,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389145469] [2019-10-15 01:58:58,398 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:58,398 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:58:58,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:58:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:58:58,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389145469] [2019-10-15 01:58:58,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832725606] [2019-10-15 01:58:58,463 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 01:58:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:58:58,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:58:58,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:58:58,657 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:58:58,659 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:58:58,661 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:58:58,672 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2019-10-15 01:58:58,673 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:58:58,690 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:58,697 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:58:58,698 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:58:58,700 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:58:58,702 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2019-10-15 01:58:58,703 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:58:58,715 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:58,716 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:58:58,716 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2019-10-15 01:58:58,785 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-15 01:58:58,787 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 24 treesize of output 10 [2019-10-15 01:58:58,788 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:58:58,799 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:58,804 INFO L341 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-10-15 01:58:58,805 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2019-10-15 01:58:58,806 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 01:58:58,812 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:58:58,813 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:58:58,813 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:47, output treesize:7 [2019-10-15 01:58:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:58:58,839 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:58:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:58:58,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815254216] [2019-10-15 01:58:58,932 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:58:58,932 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:58:58,941 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:58:58,951 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:58:58,952 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:58:59,085 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:58:59,513 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:58:59,523 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:59:00,412 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 116 [2019-10-15 01:59:08,970 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:59:08,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 13] total 22 [2019-10-15 01:59:08,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253972243] [2019-10-15 01:59:08,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:59:08,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:59:08,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:59:08,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=373, Unknown=4, NotChecked=0, Total=462 [2019-10-15 01:59:08,973 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 22 states. [2019-10-15 01:59:36,144 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 123 [2019-10-15 01:59:40,384 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-10-15 01:59:43,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:59:43,350 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2019-10-15 01:59:43,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 01:59:43,350 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 20 [2019-10-15 01:59:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:59:43,352 INFO L225 Difference]: With dead ends: 73 [2019-10-15 01:59:43,352 INFO L226 Difference]: Without dead ends: 51 [2019-10-15 01:59:43,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=177, Invalid=810, Unknown=5, NotChecked=0, Total=992 [2019-10-15 01:59:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-15 01:59:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2019-10-15 01:59:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:59:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-10-15 01:59:43,359 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 20 [2019-10-15 01:59:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:59:43,359 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-10-15 01:59:43,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:59:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-10-15 01:59:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:59:43,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:59:43,361 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:59:43,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:59:43,568 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:59:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:59:43,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1465232090, now seen corresponding path program 1 times [2019-10-15 01:59:43,569 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:59:43,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933217033] [2019-10-15 01:59:43,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:43,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:59:43,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:59:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:59:43,988 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27