/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 EqDomain -i ../sv-benchmarks/c/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:51:02,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:51:02,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:51:02,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:51:02,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:51:02,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:51:02,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:51:02,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:51:02,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:51:02,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:51:02,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:51:02,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:51:02,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:51:02,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:51:02,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:51:02,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:51:02,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:51:02,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:51:02,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:51:02,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:51:02,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:51:02,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:51:02,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:51:02,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:51:02,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:51:02,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:51:02,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:51:02,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:51:02,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:51:02,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:51:02,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:51:02,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:51:02,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:51:02,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:51:02,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:51:02,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:51:02,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:51:02,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:51:02,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:51:02,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:51:02,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:51:02,934 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 10:51:02,947 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:51:02,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:51:02,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:51:02,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:51:02,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:51:02,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:51:02,948 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:51:02,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:51:02,948 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:51:02,948 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:51:02,948 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:51:02,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:51:02,949 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:51:02,949 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:51:02,949 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:51:02,949 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:51:02,949 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:51:02,949 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:51:02,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:51:02,950 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:51:02,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:51:02,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:51:02,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:51:02,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:51:02,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:51:02,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:51:02,950 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:51:02,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:51:02,951 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:51:02,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:51:02,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:51:02,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:51:02,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:51:02,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:51:02,951 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:51:02,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:51:02,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:51:02,952 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:51:02,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:51:02,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:51:02,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:51:02,952 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:51:03,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:51:03,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:51:03,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:51:03,121 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:51:03,122 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:51:03,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2023-04-01 10:51:04,166 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:51:04,394 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:51:04,394 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2023-04-01 10:51:04,405 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944a751c1/221a83c6ec584c17bc0c8c7da9164151/FLAG09f738ae6 [2023-04-01 10:51:04,415 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944a751c1/221a83c6ec584c17bc0c8c7da9164151 [2023-04-01 10:51:04,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:51:04,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:51:04,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:51:04,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:51:04,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:51:04,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@410c1ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04, skipping insertion in model container [2023-04-01 10:51:04,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:51:04,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:51:04,759 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/heap-manipulation/merge_sort-1.i[22632,22645] [2023-04-01 10:51:04,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:51:04,814 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:51:04,842 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/heap-manipulation/merge_sort-1.i[22632,22645] [2023-04-01 10:51:04,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:51:04,890 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:51:04,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04 WrapperNode [2023-04-01 10:51:04,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:51:04,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:51:04,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:51:04,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:51:04,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,970 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:51:04,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:51:04,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:51:04,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:51:04,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04" (1/1) ... [2023-04-01 10:51:04,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:51:05,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:51:05,023 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 10:51:05,029 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 10:51:05,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:51:05,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:51:05,088 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:51:05,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 10:51:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 10:51:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-04-01 10:51:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2023-04-01 10:51:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2023-04-01 10:51:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2023-04-01 10:51:05,089 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2023-04-01 10:51:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2023-04-01 10:51:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:51:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:51:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:51:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 10:51:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 10:51:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:51:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:51:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 10:51:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 10:51:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 10:51:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 10:51:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 10:51:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 10:51:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 10:51:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 10:51:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 10:51:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 10:51:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 10:51:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 10:51:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 10:51:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 10:51:05,094 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 10:51:05,094 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 10:51:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 10:51:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 10:51:05,095 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 10:51:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 10:51:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 10:51:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 10:51:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 10:51:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 10:51:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 10:51:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 10:51:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 10:51:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 10:51:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 10:51:05,110 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 10:51:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 10:51:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 10:51:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 10:51:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 10:51:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 10:51:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 10:51:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 10:51:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 10:51:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 10:51:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 10:51:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 10:51:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 10:51:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 10:51:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 10:51:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 10:51:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 10:51:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 10:51:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 10:51:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 10:51:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 10:51:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 10:51:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:51:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 10:51:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 10:51:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 10:51:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 10:51:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 10:51:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 10:51:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 10:51:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 10:51:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 10:51:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 10:51:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 10:51:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 10:51:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 10:51:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 10:51:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 10:51:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 10:51:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 10:51:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 10:51:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 10:51:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 10:51:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 10:51:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 10:51:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 10:51:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 10:51:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:51:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-04-01 10:51:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2023-04-01 10:51:05,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 10:51:05,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:51:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:51:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:51:05,353 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:51:05,355 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:51:05,625 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:51:05,693 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:51:05,693 INFO L302 CfgBuilder]: Removed 33 assume(true) statements. [2023-04-01 10:51:05,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:51:05 BoogieIcfgContainer [2023-04-01 10:51:05,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:51:05,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:51:05,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:51:05,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:51:05,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:51:04" (1/3) ... [2023-04-01 10:51:05,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fbf6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:51:05, skipping insertion in model container [2023-04-01 10:51:05,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:51:04" (2/3) ... [2023-04-01 10:51:05,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fbf6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:51:05, skipping insertion in model container [2023-04-01 10:51:05,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:51:05" (3/3) ... [2023-04-01 10:51:05,699 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2023-04-01 10:51:05,710 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:51:05,710 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:51:05,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:51:05,750 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;@4b88da9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:51:05,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:51:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 86 states have internal predecessors, (124), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 10:51:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 10:51:05,757 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:05,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:05,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:05,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:05,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1195293700, now seen corresponding path program 1 times [2023-04-01 10:51:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:05,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227571121] [2023-04-01 10:51:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:05,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:05,879 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 10:51:05,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:05,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227571121] [2023-04-01 10:51:05,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227571121] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:05,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:05,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 10:51:05,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879545899] [2023-04-01 10:51:05,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:05,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 10:51:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:05,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 10:51:05,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 10:51:05,917 INFO L87 Difference]: Start difference. First operand has 100 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 86 states have internal predecessors, (124), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:05,975 INFO L93 Difference]: Finished difference Result 192 states and 327 transitions. [2023-04-01 10:51:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 10:51:05,977 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 10:51:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:05,984 INFO L225 Difference]: With dead ends: 192 [2023-04-01 10:51:05,984 INFO L226 Difference]: Without dead ends: 90 [2023-04-01 10:51:05,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 10:51:05,993 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:05,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:51:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-01 10:51:06,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-04-01 10:51:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 78 states have internal predecessors, (83), 21 states have call successors, (21), 8 states have call predecessors, (21), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2023-04-01 10:51:06,030 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 12 [2023-04-01 10:51:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:06,031 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2023-04-01 10:51:06,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2023-04-01 10:51:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 10:51:06,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:06,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:06,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:51:06,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:06,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1762023615, now seen corresponding path program 1 times [2023-04-01 10:51:06,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:06,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463007554] [2023-04-01 10:51:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:06,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:06,112 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 10:51:06,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:06,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463007554] [2023-04-01 10:51:06,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463007554] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:06,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:06,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:51:06,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530790134] [2023-04-01 10:51:06,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:06,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:51:06,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:06,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:51:06,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:51:06,115 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:06,177 INFO L93 Difference]: Finished difference Result 175 states and 215 transitions. [2023-04-01 10:51:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:51:06,178 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 10:51:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:06,180 INFO L225 Difference]: With dead ends: 175 [2023-04-01 10:51:06,180 INFO L226 Difference]: Without dead ends: 92 [2023-04-01 10:51:06,185 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 10:51:06,185 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:06,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 195 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:51:06,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-04-01 10:51:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-04-01 10:51:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 80 states have internal predecessors, (85), 21 states have call successors, (21), 8 states have call predecessors, (21), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-04-01 10:51:06,192 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 13 [2023-04-01 10:51:06,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:06,192 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-04-01 10:51:06,192 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-04-01 10:51:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 10:51:06,192 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:06,192 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:06,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:51:06,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:06,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:06,193 INFO L85 PathProgramCache]: Analyzing trace with hash 598701301, now seen corresponding path program 1 times [2023-04-01 10:51:06,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:06,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158006393] [2023-04-01 10:51:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:06,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:06,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158006393] [2023-04-01 10:51:06,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158006393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:06,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:06,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:51:06,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50859455] [2023-04-01 10:51:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:51:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:51:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:51:06,293 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:06,388 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2023-04-01 10:51:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:51:06,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 10:51:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:06,389 INFO L225 Difference]: With dead ends: 134 [2023-04-01 10:51:06,389 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 10:51:06,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:06,390 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 108 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:06,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 298 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:06,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 10:51:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2023-04-01 10:51:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.289855072463768) internal successors, (89), 83 states have internal predecessors, (89), 20 states have call successors, (20), 8 states have call predecessors, (20), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2023-04-01 10:51:06,399 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 15 [2023-04-01 10:51:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:06,399 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2023-04-01 10:51:06,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2023-04-01 10:51:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 10:51:06,400 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:06,400 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] [2023-04-01 10:51:06,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:51:06,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:06,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:06,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1491454638, now seen corresponding path program 1 times [2023-04-01 10:51:06,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:06,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662236175] [2023-04-01 10:51:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:06,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:51:06,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:06,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662236175] [2023-04-01 10:51:06,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662236175] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:06,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:06,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:51:06,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746983637] [2023-04-01 10:51:06,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:06,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:51:06,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:51:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:51:06,544 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:06,673 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2023-04-01 10:51:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:51:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 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 10:51:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:06,674 INFO L225 Difference]: With dead ends: 97 [2023-04-01 10:51:06,674 INFO L226 Difference]: Without dead ends: 94 [2023-04-01 10:51:06,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:06,675 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 12 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:06,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 300 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-01 10:51:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-04-01 10:51:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 82 states have internal predecessors, (88), 19 states have call successors, (19), 8 states have call predecessors, (19), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2023-04-01 10:51:06,682 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 22 [2023-04-01 10:51:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:06,682 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2023-04-01 10:51:06,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2023-04-01 10:51:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 10:51:06,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:06,683 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] [2023-04-01 10:51:06,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:51:06,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:06,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1816870628, now seen corresponding path program 1 times [2023-04-01 10:51:06,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:06,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302272238] [2023-04-01 10:51:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:06,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 10:51:06,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:06,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302272238] [2023-04-01 10:51:06,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302272238] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:06,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:06,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:51:06,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705559610] [2023-04-01 10:51:06,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:06,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:51:06,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:51:06,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:51:06,794 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:06,913 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2023-04-01 10:51:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:51:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 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 10:51:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:06,914 INFO L225 Difference]: With dead ends: 96 [2023-04-01 10:51:06,915 INFO L226 Difference]: Without dead ends: 93 [2023-04-01 10:51:06,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:06,918 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 13 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:06,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 291 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:06,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-01 10:51:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-04-01 10:51:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 81 states have internal predecessors, (87), 18 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2023-04-01 10:51:06,969 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 22 [2023-04-01 10:51:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:06,969 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2023-04-01 10:51:06,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2023-04-01 10:51:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:51:06,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:06,973 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] [2023-04-01 10:51:06,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:51:06,973 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:06,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash 251895696, now seen corresponding path program 1 times [2023-04-01 10:51:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:06,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806091979] [2023-04-01 10:51:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:06,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:07,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:07,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806091979] [2023-04-01 10:51:07,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806091979] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:07,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:07,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 10:51:07,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123844899] [2023-04-01 10:51:07,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:07,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:51:07,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:07,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:51:07,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:07,155 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:07,302 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2023-04-01 10:51:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:51:07,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 10:51:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:07,303 INFO L225 Difference]: With dead ends: 126 [2023-04-01 10:51:07,303 INFO L226 Difference]: Without dead ends: 123 [2023-04-01 10:51:07,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:51:07,304 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 91 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:07,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-01 10:51:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2023-04-01 10:51:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.24) internal successors, (93), 87 states have internal predecessors, (93), 18 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-04-01 10:51:07,311 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 25 [2023-04-01 10:51:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:07,311 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-04-01 10:51:07,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-04-01 10:51:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:51:07,311 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:07,311 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] [2023-04-01 10:51:07,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:51:07,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:07,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1038832177, now seen corresponding path program 1 times [2023-04-01 10:51:07,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:07,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401344281] [2023-04-01 10:51:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:07,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:07,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:07,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401344281] [2023-04-01 10:51:07,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401344281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:51:07,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:51:07,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 10:51:07,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369240691] [2023-04-01 10:51:07,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:51:07,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:51:07,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:51:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:51:07,395 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:07,546 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2023-04-01 10:51:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:51:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 10:51:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:07,547 INFO L225 Difference]: With dead ends: 125 [2023-04-01 10:51:07,547 INFO L226 Difference]: Without dead ends: 122 [2023-04-01 10:51:07,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:51:07,548 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 89 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:07,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-04-01 10:51:07,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2023-04-01 10:51:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 93 states have internal predecessors, (99), 18 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:51:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2023-04-01 10:51:07,554 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 25 [2023-04-01 10:51:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:07,554 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2023-04-01 10:51:07,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:07,555 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2023-04-01 10:51:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 10:51:07,555 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:07,555 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] [2023-04-01 10:51:07,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 10:51:07,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:07,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash 694641243, now seen corresponding path program 1 times [2023-04-01 10:51:07,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:07,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160974062] [2023-04-01 10:51:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:07,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:07,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:51:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160974062] [2023-04-01 10:51:07,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160974062] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:51:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865306155] [2023-04-01 10:51:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:07,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:51:07,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:51:07,758 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 10:51:07,783 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 10:51:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:51:07,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 10:51:07,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:51:07,989 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 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 10:51:08,005 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 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 10:51:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:08,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:51:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:51:08,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865306155] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:51:08,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002697355] [2023-04-01 10:51:08,209 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 10:51:08,209 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:51:08,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:51:08,216 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:51:08,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:51:08,286 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:51:08,535 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_before with input of size 46 for LOIs [2023-04-01 10:51:08,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:51:08,694 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 74 for LOIs [2023-04-01 10:51:08,702 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:51:10,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2771#(and (not (= |#StackHeapBarrier| 0)) (exists ((|v_inspect_before_#in~shape.base_BEFORE_CALL_1| Int)) (and (not (= |v_inspect_before_#in~shape.base_BEFORE_CALL_1| 0)) (or (not (= (select (select |#memory_$Pointer$.base| |v_inspect_before_#in~shape.base_BEFORE_CALL_1|) 4) 0)) (not (= (select (select |#memory_$Pointer$.offset| |v_inspect_before_#in~shape.base_BEFORE_CALL_1|) 4) 0))) (or (not (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_inspect_before_#in~shape.base_BEFORE_CALL_1|) 0)) (select (select |#memory_$Pointer$.offset| |v_inspect_before_#in~shape.base_BEFORE_CALL_1|) 0)) 0)) (not (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_inspect_before_#in~shape.base_BEFORE_CALL_1|) 0)) (select (select |#memory_$Pointer$.offset| |v_inspect_before_#in~shape.base_BEFORE_CALL_1|) 0)) 0))) (or (not (= 0 (select (select |#memory_$Pointer$.base| |v_inspect_before_#in~shape.base_BEFORE_CALL_1|) 0))) (not (= (select (select |#memory_$Pointer$.offset| |v_inspect_before_#in~shape.base_BEFORE_CALL_1|) 0) 0))) (not (= |v_inspect_before_#in~shape.base_BEFORE_CALL_1| |#StackHeapBarrier|)))) (exists ((|v_old(#length)_BEFORE_CALL_1| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_1| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_1| (Array Int Int))) (and (not (= |v_old(#valid)_BEFORE_CALL_1| |v_old(#length)_BEFORE_CALL_1|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#valid)_BEFORE_CALL_1|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_1| 1) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_1| 1)) (= (select |v_old(#valid)_BEFORE_CALL_1| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#length)_BEFORE_CALL_1|)) (= (select |v_old(#valid)_BEFORE_CALL_1| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_1| 2) 15))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 10:51:10,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:51:10,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:51:10,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-04-01 10:51:10,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764697131] [2023-04-01 10:51:10,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:51:10,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 10:51:10,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:51:10,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 10:51:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2023-04-01 10:51:10,293 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:10,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:51:10,501 INFO L93 Difference]: Finished difference Result 214 states and 253 transitions. [2023-04-01 10:51:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:51:10,502 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-01 10:51:10,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:51:10,503 INFO L225 Difference]: With dead ends: 214 [2023-04-01 10:51:10,503 INFO L226 Difference]: Without dead ends: 132 [2023-04-01 10:51:10,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2023-04-01 10:51:10,504 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 57 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:51:10,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 508 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:51:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-01 10:51:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2023-04-01 10:51:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 101 states have (on average 1.198019801980198) internal successors, (121), 114 states have internal predecessors, (121), 19 states have call successors, (19), 9 states have call predecessors, (19), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 10:51:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2023-04-01 10:51:10,512 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 28 [2023-04-01 10:51:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:51:10,512 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2023-04-01 10:51:10,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:51:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2023-04-01 10:51:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 10:51:10,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:51:10,521 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] [2023-04-01 10:51:10,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:51:10,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:51:10,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:51:10,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:51:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1846756687, now seen corresponding path program 1 times [2023-04-01 10:51:10,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:51:10,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117706814] [2023-04-01 10:51:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:51:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:51:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 10:51:10,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 10:51:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 10:51:10,807 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 10:51:10,807 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 10:51:10,808 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 10:51:10,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 10:51:10,811 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:51:10,815 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 10:51:10,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 10:51:10 BoogieIcfgContainer [2023-04-01 10:51:10,839 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 10:51:10,839 INFO L158 Benchmark]: Toolchain (without parser) took 6420.88ms. Allocated memory was 251.7MB in the beginning and 332.4MB in the end (delta: 80.7MB). Free memory was 205.2MB in the beginning and 266.5MB in the end (delta: -61.3MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2023-04-01 10:51:10,839 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 155.2MB. Free memory is still 107.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 10:51:10,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 471.99ms. Allocated memory is still 251.7MB. Free memory was 204.7MB in the beginning and 186.9MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-04-01 10:51:10,840 INFO L158 Benchmark]: Boogie Preprocessor took 83.83ms. Allocated memory is still 251.7MB. Free memory was 186.5MB in the beginning and 183.1MB in the end (delta: 3.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-04-01 10:51:10,840 INFO L158 Benchmark]: RCFGBuilder took 718.87ms. Allocated memory is still 251.7MB. Free memory was 183.1MB in the beginning and 209.3MB in the end (delta: -26.2MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. [2023-04-01 10:51:10,840 INFO L158 Benchmark]: TraceAbstraction took 5142.62ms. Allocated memory was 251.7MB in the beginning and 332.4MB in the end (delta: 80.7MB). Free memory was 208.8MB in the beginning and 266.5MB in the end (delta: -57.7MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2023-04-01 10:51:10,842 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 155.2MB. Free memory is still 107.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 471.99ms. Allocated memory is still 251.7MB. Free memory was 204.7MB in the beginning and 186.9MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 83.83ms. Allocated memory is still 251.7MB. Free memory was 186.5MB in the beginning and 183.1MB in the end (delta: 3.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 718.87ms. Allocated memory is still 251.7MB. Free memory was 183.1MB in the beginning and 209.3MB in the end (delta: -26.2MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. * TraceAbstraction took 5142.62ms. Allocated memory was 251.7MB in the beginning and 332.4MB in the end (delta: 80.7MB). Free memory was 208.8MB in the beginning and 266.5MB in the end (delta: -57.7MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L638] struct list *data = ((void *)0); VAL [data={0:0}] [L639] COND TRUE __VERIFIER_nondet_int() [L640] struct node *node = malloc(sizeof *node); [L641] COND FALSE !(!node) [L643] node->next = node [L644] node->value = __VERIFIER_nondet_int() [L645] struct list *item = malloc(sizeof *item); [L646] COND FALSE !(!item) [L648] item->slist = node [L649] item->next = data [L650] data = item VAL [data={-2:0}, item={-2:0}, node={-3:0}] [L639] COND FALSE !(__VERIFIER_nondet_int()) [L652] COND FALSE !(!data) VAL [data={-2:0}, item={-2:0}, node={-3:0}] [L654] CALL inspect_before(data) VAL [shape={-2:0}] [L615] COND FALSE !(!(shape)) VAL [shape={-2:0}, shape={-2:0}] [L616] shape->next VAL [shape->next={0:0}, shape={-2:0}, shape={-2:0}] [L616] COND FALSE !(shape->next) [L622] COND FALSE !(!(shape)) VAL [shape={-2:0}, shape={-2:0}] [L623] EXPR shape->next VAL [shape->next={0:0}, shape={-2:0}, shape={-2:0}] [L623] COND FALSE !(!(shape->next == ((void *)0))) [L624] EXPR shape->slist VAL [shape->slist={-3:0}, shape={-2:0}, shape={-2:0}] [L624] COND FALSE !(!(shape->slist)) [L625] EXPR shape->slist [L625] EXPR shape->slist->next VAL [shape->slist->next={-3:0}, shape->slist={-3:0}, shape={-2:0}, shape={-2:0}] [L625] COND TRUE !(shape->slist->next == ((void *)0)) [L625] CALL fail() [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 106 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.1s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 378 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 370 mSDsluCounter, 2321 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1604 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 922 IncrementalHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 717 mSDtfsCounter, 922 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=8, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 80 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 218 NumberOfCodeBlocks, 218 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 1102 SizeOfPredicates, 8 NumberOfNonLiveVariables, 172 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 10/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-01 10:51:10,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...