/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/forester-heap/sll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:51:10,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:51:10,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:51:10,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:51:10,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:51:10,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:51:10,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:51:10,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:51:10,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:51:10,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:51:10,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:51:10,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:51:10,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:51:10,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:51:10,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:51:10,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:51:10,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:51:10,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:51:10,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:51:10,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:51:10,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:51:10,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:51:10,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:51:10,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:51:10,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:51:10,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:51:10,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:51:10,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:51:10,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:51:10,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:51:10,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:51:10,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:51:10,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:51:10,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:51:10,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:51:10,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:51:10,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:51:10,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:51:10,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:51:10,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:51:10,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:51:10,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:51:10,953 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:51:10,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:51:10,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:51:10,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:51:10,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:51:10,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:51:10,955 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:51:10,955 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:51:10,955 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:51:10,955 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:51:10,956 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:51:10,956 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:51:10,956 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:51:10,956 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:51:10,956 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:51:10,956 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:51:10,957 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:51:10,957 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:51:10,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:51:10,957 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:51:10,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:51:10,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:51:10,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:51:10,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:51:10,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:51:10,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:51:10,958 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:51:10,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:51:10,959 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:51:10,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:51:10,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:51:10,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:51:10,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:51:10,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:51:10,960 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:51:10,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:51:10,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:51:10,960 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:51:10,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:51:10,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:51:10,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:51:10,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:51:11,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:51:11,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:51:11,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:51:11,168 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:51:11,168 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:51:11,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-01-1.i [2023-04-01 04:51:12,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:51:12,639 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:51:12,639 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i [2023-04-01 04:51:12,669 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7cd26399/5f2fe59176854bcd874316b72cac5a14/FLAGc8945a14b [2023-04-01 04:51:12,681 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7cd26399/5f2fe59176854bcd874316b72cac5a14 [2023-04-01 04:51:12,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:51:12,684 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:51:12,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:51:12,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:51:12,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:51:12,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:51:12" (1/1) ... [2023-04-01 04:51:12,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630be42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:12, skipping insertion in model container [2023-04-01 04:51:12,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:51:12" (1/1) ... [2023-04-01 04:51:12,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:51:12,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:51:13,005 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22034,22047] [2023-04-01 04:51:13,011 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22307,22320] [2023-04-01 04:51:13,013 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22516,22529] [2023-04-01 04:51:13,014 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22586,22599] [2023-04-01 04:51:13,016 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22853,22866] [2023-04-01 04:51:13,016 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22961,22974] [2023-04-01 04:51:13,019 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23192,23205] [2023-04-01 04:51:13,020 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23272,23285] [2023-04-01 04:51:13,020 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23351,23364] [2023-04-01 04:51:13,021 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23441,23454] [2023-04-01 04:51:13,022 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23619,23632] [2023-04-01 04:51:13,023 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23697,23710] [2023-04-01 04:51:13,023 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23774,23787] [2023-04-01 04:51:13,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:51:13,039 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:51:13,072 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22034,22047] [2023-04-01 04:51:13,075 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22307,22320] [2023-04-01 04:51:13,076 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22516,22529] [2023-04-01 04:51:13,077 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22586,22599] [2023-04-01 04:51:13,079 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22853,22866] [2023-04-01 04:51:13,079 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[22961,22974] [2023-04-01 04:51:13,081 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23192,23205] [2023-04-01 04:51:13,081 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23272,23285] [2023-04-01 04:51:13,082 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23351,23364] [2023-04-01 04:51:13,083 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23441,23454] [2023-04-01 04:51:13,084 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23619,23632] [2023-04-01 04:51:13,085 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23697,23710] [2023-04-01 04:51:13,085 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i[23774,23787] [2023-04-01 04:51:13,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:51:13,112 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:51:13,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13 WrapperNode [2023-04-01 04:51:13,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:51:13,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:51:13,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:51:13,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:51:13,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13" (1/1) ... [2023-04-01 04:51:13,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13" (1/1) ... [2023-04-01 04:51:13,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13" (1/1) ... [2023-04-01 04:51:13,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13" (1/1) ... [2023-04-01 04:51:13,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13" (1/1) ... [2023-04-01 04:51:13,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13" (1/1) ... [2023-04-01 04:51:13,171 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13" (1/1) ... [2023-04-01 04:51:13,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13" (1/1) ... [2023-04-01 04:51:13,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:51:13,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:51:13,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:51:13,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:51:13,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13" (1/1) ... [2023-04-01 04:51:13,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:51:13,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:13,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:51:13,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:51:13,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:51:13,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:51:13,248 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:51:13,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:51:13,249 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:51:13,249 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:51:13,249 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:51:13,249 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:51:13,249 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:51:13,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:51:13,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:51:13,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:51:13,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:51:13,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:51:13,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:51:13,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:51:13,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:51:13,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:51:13,250 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:51:13,250 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:51:13,250 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:51:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:51:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:51:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:51:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:51:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:51:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:51:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:51:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:51:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:51:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:51:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:51:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:51:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:51:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:51:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:51:13,252 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:51:13,253 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:51:13,253 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:51:13,253 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:51:13,253 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:51:13,253 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:51:13,253 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:51:13,253 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:51:13,253 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:51:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:51:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:51:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:51:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:51:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:51:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:51:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:51:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:51:13,254 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:51:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:51:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:51:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:51:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:51:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:51:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:51:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:51:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:51:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:51:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:51:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:51:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:51:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:51:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:51:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:51:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:51:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:51:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:51:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:51:13,257 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:51:13,257 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:51:13,257 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:51:13,257 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:51:13,257 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:51:13,257 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:51:13,257 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:51:13,257 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:51:13,257 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:51:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:51:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:51:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:51:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:51:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:51:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:51:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:51:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:51:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:51:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:51:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:51:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:51:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:51:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:51:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:51:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:51:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:51:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:51:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:51:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:51:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:51:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:51:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:51:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:51:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:51:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:51:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:51:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:51:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:51:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:51:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:51:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:51:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:51:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:51:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:51:13,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:51:13,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:51:13,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:51:13,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:51:13,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:51:13,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:51:13,448 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:51:13,450 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:51:13,894 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:51:13,987 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:51:13,987 INFO L302 CfgBuilder]: Removed 30 assume(true) statements. [2023-04-01 04:51:13,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:51:13 BoogieIcfgContainer [2023-04-01 04:51:13,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:51:13,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:51:13,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:51:13,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:51:13,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:51:12" (1/3) ... [2023-04-01 04:51:13,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ade2971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:51:13, skipping insertion in model container [2023-04-01 04:51:13,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:13" (2/3) ... [2023-04-01 04:51:13,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ade2971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:51:13, skipping insertion in model container [2023-04-01 04:51:13,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:51:13" (3/3) ... [2023-04-01 04:51:13,997 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-01-1.i [2023-04-01 04:51:14,012 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:51:14,012 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-04-01 04:51:14,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:51:14,081 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3ac8fa18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:51:14,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-04-01 04:51:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 62 states have (on average 1.935483870967742) internal successors, (120), 75 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:51:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-04-01 04:51:14,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:14,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:14,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:14,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1707333539, now seen corresponding path program 1 times [2023-04-01 04:51:14,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:14,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073027090] [2023-04-01 04:51:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:14,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:14,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:14,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073027090] [2023-04-01 04:51:14,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073027090] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:14,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:14,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:51:14,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162112804] [2023-04-01 04:51:14,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:14,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:51:14,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:14,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:51:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:14,343 INFO L87 Difference]: Start difference. First operand has 80 states, 62 states have (on average 1.935483870967742) internal successors, (120), 75 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:14,431 INFO L93 Difference]: Finished difference Result 171 states and 270 transitions. [2023-04-01 04:51:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:51:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-04-01 04:51:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:14,440 INFO L225 Difference]: With dead ends: 171 [2023-04-01 04:51:14,440 INFO L226 Difference]: Without dead ends: 93 [2023-04-01 04:51:14,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:14,448 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:14,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 90 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-01 04:51:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2023-04-01 04:51:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 71 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-04-01 04:51:14,497 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 7 [2023-04-01 04:51:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:14,498 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-04-01 04:51:14,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-04-01 04:51:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:51:14,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:14,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:14,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:51:14,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:14,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:14,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1294933009, now seen corresponding path program 1 times [2023-04-01 04:51:14,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:14,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006110742] [2023-04-01 04:51:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:14,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:14,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:14,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006110742] [2023-04-01 04:51:14,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006110742] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:14,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:14,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:51:14,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647006412] [2023-04-01 04:51:14,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:14,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:51:14,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:51:14,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:14,972 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:15,027 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2023-04-01 04:51:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:51:15,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:51:15,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:15,031 INFO L225 Difference]: With dead ends: 75 [2023-04-01 04:51:15,031 INFO L226 Difference]: Without dead ends: 73 [2023-04-01 04:51:15,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:15,033 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:15,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-01 04:51:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-04-01 04:51:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 69 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2023-04-01 04:51:15,045 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 11 [2023-04-01 04:51:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:15,045 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2023-04-01 04:51:15,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2023-04-01 04:51:15,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 04:51:15,046 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:15,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:15,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:51:15,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:15,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:15,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1711514031, now seen corresponding path program 1 times [2023-04-01 04:51:15,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:15,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33456446] [2023-04-01 04:51:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:15,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:15,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:15,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33456446] [2023-04-01 04:51:15,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33456446] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:15,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:15,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:51:15,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955909273] [2023-04-01 04:51:15,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:15,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:51:15,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:15,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:51:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:15,160 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:15,252 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2023-04-01 04:51:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:51:15,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 04:51:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:15,254 INFO L225 Difference]: With dead ends: 76 [2023-04-01 04:51:15,254 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 04:51:15,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:15,256 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 12 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:15,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 107 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:51:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 04:51:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2023-04-01 04:51:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 65 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2023-04-01 04:51:15,276 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 16 [2023-04-01 04:51:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:15,277 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2023-04-01 04:51:15,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2023-04-01 04:51:15,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 04:51:15,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:15,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:15,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:51:15,278 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:15,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:15,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1517331616, now seen corresponding path program 1 times [2023-04-01 04:51:15,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:15,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080875758] [2023-04-01 04:51:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:15,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:15,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:15,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080875758] [2023-04-01 04:51:15,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080875758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:15,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:15,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:51:15,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330186876] [2023-04-01 04:51:15,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:15,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:51:15,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:15,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:51:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:51:15,412 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:15,503 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2023-04-01 04:51:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:51:15,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 04:51:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:15,507 INFO L225 Difference]: With dead ends: 127 [2023-04-01 04:51:15,508 INFO L226 Difference]: Without dead ends: 107 [2023-04-01 04:51:15,508 INFO L412 NwaCegarLoop]: 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 [2023-04-01 04:51:15,510 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 115 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:15,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 108 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:51:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-01 04:51:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 68. [2023-04-01 04:51:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 64 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2023-04-01 04:51:15,524 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 17 [2023-04-01 04:51:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:15,525 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2023-04-01 04:51:15,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2023-04-01 04:51:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:51:15,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:15,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:15,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:51:15,526 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:15,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:15,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1177317895, now seen corresponding path program 1 times [2023-04-01 04:51:15,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:15,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879428576] [2023-04-01 04:51:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:15,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:15,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:15,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879428576] [2023-04-01 04:51:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879428576] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:15,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:15,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:51:15,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206003442] [2023-04-01 04:51:15,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:15,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:51:15,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:15,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:51:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:15,613 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:15,659 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2023-04-01 04:51:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:51:15,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 04:51:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:15,661 INFO L225 Difference]: With dead ends: 93 [2023-04-01 04:51:15,661 INFO L226 Difference]: Without dead ends: 91 [2023-04-01 04:51:15,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:15,662 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 23 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:15,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 123 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-01 04:51:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2023-04-01 04:51:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 66 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2023-04-01 04:51:15,671 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 21 [2023-04-01 04:51:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:15,671 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2023-04-01 04:51:15,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2023-04-01 04:51:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:51:15,672 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:15,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:15,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:51:15,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:15,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:15,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1177315875, now seen corresponding path program 1 times [2023-04-01 04:51:15,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:15,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771443978] [2023-04-01 04:51:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:15,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:15,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:15,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771443978] [2023-04-01 04:51:15,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771443978] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:15,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:15,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:51:15,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62324001] [2023-04-01 04:51:15,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:15,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:51:15,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:51:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:15,778 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:15,821 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2023-04-01 04:51:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:51:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 04:51:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:15,822 INFO L225 Difference]: With dead ends: 70 [2023-04-01 04:51:15,822 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 04:51:15,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:15,823 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:15,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 104 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 04:51:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-04-01 04:51:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.206896551724138) internal successors, (70), 64 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-04-01 04:51:15,856 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 21 [2023-04-01 04:51:15,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:15,856 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-04-01 04:51:15,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-04-01 04:51:15,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:51:15,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:15,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:15,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:51:15,862 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:15,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:15,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1211259227, now seen corresponding path program 1 times [2023-04-01 04:51:15,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:15,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397096270] [2023-04-01 04:51:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:15,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:16,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:16,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397096270] [2023-04-01 04:51:16,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397096270] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:16,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:16,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:51:16,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880070539] [2023-04-01 04:51:16,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:16,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:51:16,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:51:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:16,211 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:16,251 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2023-04-01 04:51:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:51:16,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 04:51:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:16,252 INFO L225 Difference]: With dead ends: 68 [2023-04-01 04:51:16,252 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 04:51:16,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:16,254 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:16,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:16,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 04:51:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-04-01 04:51:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-04-01 04:51:16,261 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 22 [2023-04-01 04:51:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:16,261 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-04-01 04:51:16,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-04-01 04:51:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 04:51:16,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:16,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:16,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:51:16,263 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:16,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash -710191671, now seen corresponding path program 1 times [2023-04-01 04:51:16,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:16,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106346971] [2023-04-01 04:51:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:16,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:19,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:19,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106346971] [2023-04-01 04:51:19,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106346971] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:19,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:19,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 04:51:19,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363698188] [2023-04-01 04:51:19,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:19,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 04:51:19,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 04:51:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:51:19,560 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:20,143 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2023-04-01 04:51:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 04:51:20,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 04:51:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:20,146 INFO L225 Difference]: With dead ends: 152 [2023-04-01 04:51:20,146 INFO L226 Difference]: Without dead ends: 150 [2023-04-01 04:51:20,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-04-01 04:51:20,147 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 280 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:20,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 256 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:51:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-04-01 04:51:20,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 83. [2023-04-01 04:51:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 79 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-04-01 04:51:20,166 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 24 [2023-04-01 04:51:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:20,167 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-04-01 04:51:20,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-04-01 04:51:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 04:51:20,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:20,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:20,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 04:51:20,173 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr10ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:20,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash -359386214, now seen corresponding path program 1 times [2023-04-01 04:51:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:20,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922085981] [2023-04-01 04:51:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:20,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 04:51:20,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:20,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922085981] [2023-04-01 04:51:20,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922085981] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:20,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:20,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:51:20,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847238740] [2023-04-01 04:51:20,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:20,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:51:20,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:20,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:51:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:20,228 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:20,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:20,284 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2023-04-01 04:51:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:51:20,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-01 04:51:20,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:20,285 INFO L225 Difference]: With dead ends: 83 [2023-04-01 04:51:20,285 INFO L226 Difference]: Without dead ends: 81 [2023-04-01 04:51:20,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:20,286 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 43 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:20,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-01 04:51:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-04-01 04:51:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 77 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2023-04-01 04:51:20,299 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 27 [2023-04-01 04:51:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:20,299 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2023-04-01 04:51:20,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2023-04-01 04:51:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 04:51:20,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:20,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:20,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 04:51:20,300 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr8ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:20,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash -307051473, now seen corresponding path program 1 times [2023-04-01 04:51:20,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:20,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516998301] [2023-04-01 04:51:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:20,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:22,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:22,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516998301] [2023-04-01 04:51:22,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516998301] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:22,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:22,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 04:51:22,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748095228] [2023-04-01 04:51:22,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:22,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 04:51:22,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:22,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 04:51:22,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:51:22,762 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:23,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:23,225 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2023-04-01 04:51:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 04:51:23,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-01 04:51:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:23,226 INFO L225 Difference]: With dead ends: 139 [2023-04-01 04:51:23,227 INFO L226 Difference]: Without dead ends: 137 [2023-04-01 04:51:23,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-04-01 04:51:23,227 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 212 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:23,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 272 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:51:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-04-01 04:51:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 88. [2023-04-01 04:51:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.175) internal successors, (94), 84 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2023-04-01 04:51:23,249 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 27 [2023-04-01 04:51:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:23,249 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2023-04-01 04:51:23,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2023-04-01 04:51:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:51:23,252 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:23,252 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:23,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 04:51:23,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr7ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-01 04:51:23,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash -281182999, now seen corresponding path program 1 times [2023-04-01 04:51:23,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:23,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950923379] [2023-04-01 04:51:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:23,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:24,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:24,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950923379] [2023-04-01 04:51:24,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950923379] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:51:24,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440386964] [2023-04-01 04:51:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:24,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:24,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:24,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:51:24,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:51:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:24,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 04:51:24,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:51:24,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:51:24,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:51:24,727 INFO L350 Elim1Store]: Elim1 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 [2023-04-01 04:51:24,913 INFO L321 Elim1Store]: treesize reduction 63, result has 40.0 percent of original size [2023-04-01 04:51:24,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 254 [2023-04-01 04:51:24,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 284 [2023-04-01 04:51:24,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 167 treesize of output 165 [2023-04-01 04:51:25,051 INFO L321 Elim1Store]: treesize reduction 63, result has 25.0 percent of original size [2023-04-01 04:51:25,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 351 treesize of output 379 [2023-04-01 04:51:25,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 158 [2023-04-01 04:51:25,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 139 treesize of output 137 [2023-04-01 04:51:25,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2023-04-01 04:51:25,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 112 treesize of output 106 [2023-04-01 04:51:25,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 122 treesize of output 114 [2023-04-01 04:51:25,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 74 treesize of output 62 [2023-04-01 04:51:25,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:25,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2023-04-01 04:51:25,613 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-04-01 04:51:25,613 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 1 [2023-04-01 04:51:25,620 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:51:25,622 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-01 04:51:25,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 1 [2023-04-01 04:51:25,681 INFO L321 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2023-04-01 04:51:25,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 36 [2023-04-01 04:51:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:26,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:51:26,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:26,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 200 treesize of output 216 [2023-04-01 04:51:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:26,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440386964] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:51:26,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733422076] [2023-04-01 04:51:26,868 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 04:51:26,868 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:51:26,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:51:26,874 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:51:26,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:51:26,921 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:51:28,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:51:28,440 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:51:34,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [733422076] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:34,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:51:34,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6, 8, 8] total 31 [2023-04-01 04:51:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456341253] [2023-04-01 04:51:34,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:34,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 04:51:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 04:51:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=713, Unknown=9, NotChecked=0, Total=930 [2023-04-01 04:51:34,378 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 18 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)