/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/forester-heap/sll-reverse_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 02:09:42,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 02:09:42,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 02:09:42,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 02:09:42,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 02:09:42,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 02:09:42,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 02:09:42,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 02:09:42,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 02:09:42,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 02:09:42,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 02:09:42,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 02:09:42,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 02:09:42,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 02:09:42,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 02:09:42,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 02:09:42,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 02:09:42,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 02:09:42,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 02:09:42,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 02:09:42,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 02:09:42,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 02:09:42,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 02:09:42,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 02:09:42,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 02:09:42,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 02:09:42,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 02:09:42,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 02:09:42,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 02:09:42,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 02:09:42,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 02:09:42,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 02:09:42,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 02:09:42,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 02:09:42,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 02:09:42,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 02:09:42,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 02:09:42,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 02:09:42,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 02:09:42,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 02:09:42,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 02:09:42,741 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 02:09:42,755 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 02:09:42,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 02:09:42,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 02:09:42,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 02:09:42,757 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 02:09:42,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 02:09:42,758 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 02:09:42,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 02:09:42,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 02:09:42,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 02:09:42,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 02:09:42,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 02:09:42,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 02:09:42,759 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 02:09:42,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 02:09:42,759 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 02:09:42,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 02:09:42,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 02:09:42,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 02:09:42,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 02:09:42,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 02:09:42,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 02:09:42,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 02:09:42,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 02:09:42,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 02:09:42,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 02:09:42,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 02:09:42,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 02:09:42,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 02:09:43,030 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 02:09:43,043 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 02:09:43,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 02:09:43,048 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 02:09:43,049 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 02:09:43,050 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-reverse_simple.i [2019-11-07 02:09:43,113 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89e89f881/804e2239e8fd4a7bb3cb80a0f1f13023/FLAGb48127e8e [2019-11-07 02:09:43,679 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 02:09:43,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-reverse_simple.i [2019-11-07 02:09:43,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89e89f881/804e2239e8fd4a7bb3cb80a0f1f13023/FLAGb48127e8e [2019-11-07 02:09:43,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89e89f881/804e2239e8fd4a7bb3cb80a0f1f13023 [2019-11-07 02:09:43,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 02:09:43,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 02:09:43,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 02:09:43,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 02:09:43,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 02:09:43,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:43" (1/1) ... [2019-11-07 02:09:43,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160dde8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:43, skipping insertion in model container [2019-11-07 02:09:43,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:43" (1/1) ... [2019-11-07 02:09:43,978 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 02:09:44,028 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 02:09:44,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:09:44,474 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 02:09:44,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:09:44,574 INFO L192 MainTranslator]: Completed translation [2019-11-07 02:09:44,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:44 WrapperNode [2019-11-07 02:09:44,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 02:09:44,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 02:09:44,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 02:09:44,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 02:09:44,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:44" (1/1) ... [2019-11-07 02:09:44,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:44" (1/1) ... [2019-11-07 02:09:44,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:44" (1/1) ... [2019-11-07 02:09:44,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:44" (1/1) ... [2019-11-07 02:09:44,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:44" (1/1) ... [2019-11-07 02:09:44,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:44" (1/1) ... [2019-11-07 02:09:44,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:44" (1/1) ... [2019-11-07 02:09:44,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 02:09:44,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 02:09:44,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 02:09:44,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 02:09:44,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 02:09:44,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 02:09:44,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 02:09:44,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 02:09:44,725 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-07 02:09:44,726 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-07 02:09:44,727 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-07 02:09:44,727 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-07 02:09:44,728 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-07 02:09:44,728 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-07 02:09:44,728 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-07 02:09:44,729 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-07 02:09:44,729 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-07 02:09:44,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-07 02:09:44,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-07 02:09:44,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-07 02:09:44,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-07 02:09:44,732 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-07 02:09:44,733 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-07 02:09:44,733 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-07 02:09:44,734 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-07 02:09:44,734 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-07 02:09:44,734 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-07 02:09:44,734 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-07 02:09:44,734 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-07 02:09:44,734 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-07 02:09:44,734 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-07 02:09:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-07 02:09:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-07 02:09:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-07 02:09:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-07 02:09:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-07 02:09:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-07 02:09:44,735 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-07 02:09:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-07 02:09:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-07 02:09:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-07 02:09:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-07 02:09:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-07 02:09:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-07 02:09:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-07 02:09:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-07 02:09:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-07 02:09:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-07 02:09:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-07 02:09:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-07 02:09:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-07 02:09:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-07 02:09:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-07 02:09:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-07 02:09:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-07 02:09:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-07 02:09:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-07 02:09:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-07 02:09:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 02:09:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 02:09:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-07 02:09:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 02:09:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-07 02:09:44,740 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-07 02:09:44,740 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-07 02:09:44,740 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-07 02:09:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-07 02:09:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-07 02:09:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-07 02:09:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-07 02:09:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-07 02:09:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 02:09:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-07 02:09:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-07 02:09:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-07 02:09:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-07 02:09:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-07 02:09:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-07 02:09:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-07 02:09:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-07 02:09:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-07 02:09:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-07 02:09:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-07 02:09:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-07 02:09:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-07 02:09:44,746 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-07 02:09:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-07 02:09:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-07 02:09:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-07 02:09:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-07 02:09:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-07 02:09:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-07 02:09:44,748 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-07 02:09:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-07 02:09:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-07 02:09:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-07 02:09:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-07 02:09:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-07 02:09:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-07 02:09:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-07 02:09:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-07 02:09:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-07 02:09:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-07 02:09:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-07 02:09:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-07 02:09:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-07 02:09:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-07 02:09:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-07 02:09:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-07 02:09:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-07 02:09:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-07 02:09:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 02:09:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 02:09:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 02:09:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 02:09:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 02:09:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 02:09:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 02:09:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 02:09:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 02:09:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 02:09:44,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 02:09:45,619 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 02:09:45,620 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-07 02:09:45,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:45 BoogieIcfgContainer [2019-11-07 02:09:45,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 02:09:45,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 02:09:45,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 02:09:45,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 02:09:45,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:43" (1/3) ... [2019-11-07 02:09:45,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6088943a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:45, skipping insertion in model container [2019-11-07 02:09:45,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:44" (2/3) ... [2019-11-07 02:09:45,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6088943a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:45, skipping insertion in model container [2019-11-07 02:09:45,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:45" (3/3) ... [2019-11-07 02:09:45,631 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple.i [2019-11-07 02:09:45,642 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 02:09:45,651 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-07 02:09:45,664 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-07 02:09:45,691 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 02:09:45,691 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 02:09:45,692 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 02:09:45,692 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 02:09:45,692 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 02:09:45,692 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 02:09:45,692 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 02:09:45,693 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 02:09:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-07 02:09:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 02:09:45,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:09:45,716 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:09:45,718 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:09:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:09:45,724 INFO L82 PathProgramCache]: Analyzing trace with hash 824743736, now seen corresponding path program 1 times [2019-11-07 02:09:45,732 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:09:45,732 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695874314] [2019-11-07 02:09:45,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:09:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:09:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:09:45,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695874314] [2019-11-07 02:09:45,872 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:09:45,899 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 02:09:45,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121953891] [2019-11-07 02:09:45,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 02:09:45,908 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:09:45,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 02:09:45,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 02:09:45,925 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-11-07 02:09:45,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:09:45,949 INFO L93 Difference]: Finished difference Result 55 states and 83 transitions. [2019-11-07 02:09:45,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 02:09:45,951 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-07 02:09:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:09:45,961 INFO L225 Difference]: With dead ends: 55 [2019-11-07 02:09:45,961 INFO L226 Difference]: Without dead ends: 27 [2019-11-07 02:09:45,964 INFO L630 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 [2019-11-07 02:09:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-07 02:09:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-07 02:09:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 02:09:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-07 02:09:46,000 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2019-11-07 02:09:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:09:46,001 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-07 02:09:46,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 02:09:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-07 02:09:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 02:09:46,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:09:46,002 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:09:46,002 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:09:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:09:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash 184584870, now seen corresponding path program 1 times [2019-11-07 02:09:46,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:09:46,003 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712551818] [2019-11-07 02:09:46,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:09:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:09:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:09:46,129 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712551818] [2019-11-07 02:09:46,130 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:09:46,133 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 02:09:46,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410345975] [2019-11-07 02:09:46,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 02:09:46,135 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:09:46,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 02:09:46,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 02:09:46,136 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2019-11-07 02:09:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:09:46,347 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2019-11-07 02:09:46,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 02:09:46,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-07 02:09:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:09:46,349 INFO L225 Difference]: With dead ends: 56 [2019-11-07 02:09:46,349 INFO L226 Difference]: Without dead ends: 37 [2019-11-07 02:09:46,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 02:09:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-07 02:09:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2019-11-07 02:09:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 02:09:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-11-07 02:09:46,357 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 12 [2019-11-07 02:09:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:09:46,357 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-07 02:09:46,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 02:09:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-11-07 02:09:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 02:09:46,358 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:09:46,359 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:09:46,359 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:09:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:09:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash 184583620, now seen corresponding path program 1 times [2019-11-07 02:09:46,360 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:09:46,360 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564262918] [2019-11-07 02:09:46,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:09:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:09:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:09:46,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564262918] [2019-11-07 02:09:46,441 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:09:46,441 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 02:09:46,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161383893] [2019-11-07 02:09:46,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 02:09:46,444 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:09:46,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 02:09:46,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 02:09:46,445 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2019-11-07 02:09:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:09:46,539 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2019-11-07 02:09:46,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 02:09:46,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-07 02:09:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:09:46,541 INFO L225 Difference]: With dead ends: 51 [2019-11-07 02:09:46,541 INFO L226 Difference]: Without dead ends: 41 [2019-11-07 02:09:46,543 INFO L630 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 [2019-11-07 02:09:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-07 02:09:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2019-11-07 02:09:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-07 02:09:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2019-11-07 02:09:46,559 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 12 [2019-11-07 02:09:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:09:46,560 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2019-11-07 02:09:46,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 02:09:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2019-11-07 02:09:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 02:09:46,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:09:46,561 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:09:46,561 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:09:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:09:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash 698560499, now seen corresponding path program 1 times [2019-11-07 02:09:46,564 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:09:46,564 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072729929] [2019-11-07 02:09:46,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:09:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:09:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:09:46,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072729929] [2019-11-07 02:09:46,736 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809105669] [2019-11-07 02:09:46,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:09:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:09:46,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-07 02:09:46,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:09:46,947 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 [2019-11-07 02:09:46,948 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:46,965 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:46,975 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 02:09:46,977 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2019-11-07 02:09:46,977 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:46,988 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:46,993 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-07 02:09:46,995 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2019-11-07 02:09:46,995 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,007 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:47,008 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,008 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:23 [2019-11-07 02:09:47,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 02:09:47,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 02:09:47,098 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 02:09:47,131 INFO L392 ElimStorePlain]: Different costs {0=[|#valid|], 1=[|v_#valid_28|]} [2019-11-07 02:09:47,142 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 02:09:47,142 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,152 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 02:09:47,153 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,421 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2019-11-07 02:09:47,421 INFO L567 ElimStorePlain]: treesize reduction 14, result has 92.1 percent of original size [2019-11-07 02:09:47,450 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:47,450 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 [2019-11-07 02:09:47,452 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,609 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-11-07 02:09:47,610 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:47,616 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_46|, |#memory_$Pointer$.offset|, v_prenex_1, |v_#memory_int_57|, v_prenex_2, |v_#memory_$Pointer$.offset_46|, |v_#memory_int_58|, v_prenex_4], 1=[|v_#memory_int_56|], 3=[v_prenex_3, v_prenex_5], 4=[|v_#memory_$Pointer$.offset_44|, |v_#memory_$Pointer$.base_44|]} [2019-11-07 02:09:47,617 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.base_46| vanished before elimination [2019-11-07 02:09:47,617 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-07 02:09:47,642 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-07 02:09:47,643 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,751 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-11-07 02:09:47,751 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:47,760 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,843 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:47,847 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,885 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:47,885 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_46| vanished before elimination [2019-11-07 02:09:47,894 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2019-11-07 02:09:47,894 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,926 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:47,933 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2019-11-07 02:09:47,933 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,955 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:47,960 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2019-11-07 02:09:47,961 INFO L496 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,978 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:47,983 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2019-11-07 02:09:47,984 INFO L496 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:47,997 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:48,002 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2019-11-07 02:09:48,003 INFO L496 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:48,019 INFO L567 ElimStorePlain]: treesize reduction 4, result has 84.6 percent of original size [2019-11-07 02:09:48,019 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_44| vanished before elimination [2019-11-07 02:09:48,019 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.base_44| vanished before elimination [2019-11-07 02:09:48,020 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 13 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 02:09:48,020 INFO L221 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:456, output treesize:23 [2019-11-07 02:09:48,043 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:48,044 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2019-11-07 02:09:48,044 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:48,059 INFO L567 ElimStorePlain]: treesize reduction 4, result has 69.2 percent of original size [2019-11-07 02:09:48,060 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 02:09:48,060 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:4 [2019-11-07 02:09:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:09:48,062 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:09:48,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 02:09:48,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 02:09:48,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 02:09:48,112 INFO L392 ElimStorePlain]: Different costs {0=[v_prenex_8, |v_#memory_$Pointer$.offset_48|, |v_#memory_int_57|, |#memory_int|], 2=[|v_#memory_$Pointer$.base_49|, |v_#memory_int_56|, v_prenex_6], 6=[v_prenex_9, v_prenex_7], 14=[|v_#memory_$Pointer$.offset_44|, |v_#memory_$Pointer$.base_44|]} [2019-11-07 02:09:48,129 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:48,147 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:48,631 WARN L191 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-07 02:09:48,631 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:48,647 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:48,952 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2019-11-07 02:09:48,952 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:48,965 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:49,279 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-11-07 02:09:49,279 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:49,300 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-07 02:09:49,315 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:49,316 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 119 [2019-11-07 02:09:49,316 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:49,566 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-11-07 02:09:49,567 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:49,572 INFO L496 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:09:49,751 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 02:09:49,752 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:49,766 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 105 [2019-11-07 02:09:49,767 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-11-07 02:09:49,895 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-11-07 02:09:49,895 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:49,910 INFO L496 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:09:49,917 INFO L496 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:09:50,091 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-07 02:09:50,092 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:50,101 INFO L496 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:09:50,112 INFO L496 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:09:50,193 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:50,202 INFO L496 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:09:50,207 INFO L496 ElimStorePlain]: Start of recursive call 14: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:09:50,301 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:50,318 INFO L496 ElimStorePlain]: Start of recursive call 15: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:09:50,375 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:50,381 INFO L496 ElimStorePlain]: Start of recursive call 16: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-07 02:09:50,426 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 02:09:50,429 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 11 dim-2 vars, End of recursive call: 10 dim-0 vars, and 3 xjuncts. [2019-11-07 02:09:50,429 INFO L221 ElimStorePlain]: Needed 16 recursive calls to eliminate 12 variables, input treesize:454, output treesize:238 [2019-11-07 02:09:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:09:50,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020351572] [2019-11-07 02:09:50,666 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 02:09:50,666 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 02:09:50,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 02:09:50,680 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 02:09:50,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 02:09:50,818 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-11-07 02:09:51,498 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 911 [2019-11-07 02:09:53,738 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 915 [2019-11-07 02:09:53,899 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 909 [2019-11-07 02:09:54,126 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 910 [2019-11-07 02:09:57,235 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 874 [2019-11-07 02:10:02,219 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 847 [2019-11-07 02:10:15,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 02:10:15,093 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 02:10:15,869 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 02:10:15,870 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-11-07 02:10:15,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220454437] [2019-11-07 02:10:15,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 02:10:15,871 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:10:15,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 02:10:15,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2019-11-07 02:10:15,875 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 21 states. [2019-11-07 02:10:16,293 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 126 [2019-11-07 02:10:16,688 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 124 [2019-11-07 02:10:17,571 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 68 [2019-11-07 02:10:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:10:19,641 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2019-11-07 02:10:19,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 02:10:19,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 18 [2019-11-07 02:10:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:10:19,643 INFO L225 Difference]: With dead ends: 78 [2019-11-07 02:10:19,643 INFO L226 Difference]: Without dead ends: 72 [2019-11-07 02:10:19,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2019-11-07 02:10:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-07 02:10:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2019-11-07 02:10:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-07 02:10:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-11-07 02:10:19,660 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 18 [2019-11-07 02:10:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:10:19,662 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-11-07 02:10:19,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 02:10:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-11-07 02:10:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 02:10:19,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:10:19,665 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 02:10:19,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:10:19,868 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:10:19,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:10:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash 111266347, now seen corresponding path program 2 times [2019-11-07 02:10:19,869 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:10:19,869 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772234180] [2019-11-07 02:10:19,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:10:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:10:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:10:20,292 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772234180] [2019-11-07 02:10:20,292 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240434785] [2019-11-07 02:10:20,292 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:10:20,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 02:10:20,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 02:10:20,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-07 02:10:20,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:10:20,731 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 02:10:20,740 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 02:10:21,044 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2019-11-07 02:10:21,204 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2019-11-07 02:10:21,323 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2019-11-07 02:10:21,449 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2019-11-07 02:10:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 02:10:22,251 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:10:24,143 WARN L191 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 151 [2019-11-07 02:10:25,505 WARN L191 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 143