/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:47:47,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:47:47,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:47:47,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:47:47,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:47:47,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:47:47,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:47:47,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:47:47,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:47:47,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:47:47,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:47:47,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:47:47,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:47:47,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:47:47,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:47:47,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:47:47,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:47:47,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:47:47,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:47:47,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:47:47,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:47:47,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:47:47,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:47:47,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:47:47,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:47:47,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:47:47,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:47:47,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:47:47,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:47:47,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:47:47,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:47:47,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:47:47,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:47:47,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:47:47,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:47:47,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:47:47,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:47:47,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:47:47,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:47:47,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:47:47,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:47:47,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:47:47,717 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:47:47,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:47:47,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:47:47,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:47:47,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:47:47,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:47:47,719 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:47:47,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:47:47,719 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:47:47,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:47:47,720 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:47:47,720 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:47:47,720 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:47:47,720 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:47:47,720 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:47:47,720 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:47:47,721 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:47:47,721 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:47:47,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:47:47,722 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:47:47,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:47:47,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:47:47,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:47:47,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:47:47,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:47:47,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:47:47,723 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:47:47,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:47:47,723 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:47:47,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:47:47,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:47:47,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:47:47,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:47:47,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:47:47,724 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:47:47,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:47:47,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:47:47,724 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:47:47,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:47:47,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:47:47,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:47:47,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:47:47,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:47:47,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:47:47,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:47:47,973 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:47:47,974 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:47:47,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-04-01 04:47:49,154 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:47:49,386 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:47:49,387 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-04-01 04:47:49,398 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e46334f/0b779de2539847cfb80d4ab27b2889f3/FLAGd41f87e94 [2023-04-01 04:47:49,411 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e46334f/0b779de2539847cfb80d4ab27b2889f3 [2023-04-01 04:47:49,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:47:49,420 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:47:49,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:47:49,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:47:49,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:47:49,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b482165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49, skipping insertion in model container [2023-04-01 04:47:49,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:47:49,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:47:49,720 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-2.i[22632,22645] [2023-04-01 04:47:49,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:47:49,756 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:47:49,794 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-2.i[22632,22645] [2023-04-01 04:47:49,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:47:49,848 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:47:49,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49 WrapperNode [2023-04-01 04:47:49,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:47:49,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:47:49,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:47:49,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:47:49,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,924 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:47:49,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:47:49,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:47:49,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:47:49,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49" (1/1) ... [2023-04-01 04:47:49,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:47:49,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:47:49,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:47:49,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:47:50,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:47:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:47:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:47:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 04:47:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 04:47:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-04-01 04:47:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2023-04-01 04:47:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2023-04-01 04:47:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2023-04-01 04:47:50,017 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2023-04-01 04:47:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2023-04-01 04:47:50,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:47:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:47:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:47:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:47:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:47:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:47:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:47:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 04:47:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 04:47:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:47:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:47:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:47:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:47:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:47:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:47:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:47:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:47:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:47:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:47:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:47:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:47:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:47:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:47:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:47:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:47:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:47:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:47:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:47:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:47:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:47:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:47:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:47:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:47:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:47:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:47:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:47:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:47:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:47:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:47:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:47:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:47:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:47:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:47:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:47:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:47:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:47:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:47:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:47:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:47:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:47:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:47:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:47:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:47:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:47:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:47:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:47:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:47:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:47:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:47:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:47:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:47:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:47:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:47:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:47:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:47:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:47:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:47:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:47:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:47:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:47:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:47:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:47:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:47:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:47:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:47:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:47:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:47:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:47:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:47:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:47:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:47:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:47:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:47:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:47:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:47:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:47:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:47:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2023-04-01 04:47:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2023-04-01 04:47:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2023-04-01 04:47:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:47:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:47:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:47:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:47:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:47:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:47:50,312 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:47:50,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:47:50,661 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:47:50,759 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:47:50,760 INFO L302 CfgBuilder]: Removed 33 assume(true) statements. [2023-04-01 04:47:50,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:47:50 BoogieIcfgContainer [2023-04-01 04:47:50,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:47:50,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:47:50,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:47:50,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:47:50,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:47:49" (1/3) ... [2023-04-01 04:47:50,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4277bbef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:47:50, skipping insertion in model container [2023-04-01 04:47:50,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:47:49" (2/3) ... [2023-04-01 04:47:50,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4277bbef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:47:50, skipping insertion in model container [2023-04-01 04:47:50,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:47:50" (3/3) ... [2023-04-01 04:47:50,773 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2023-04-01 04:47:50,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:47:50,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:47:50,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:47:50,840 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;@5fe1a7ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:47:50,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:47:50,845 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 04:47:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 04:47:50,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:50,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:47:50,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:50,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:50,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1195293700, now seen corresponding path program 1 times [2023-04-01 04:47:50,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:50,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954258398] [2023-04-01 04:47:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:50,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:47:51,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954258398] [2023-04-01 04:47:51,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954258398] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:47:51,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:47:51,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:47:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123872526] [2023-04-01 04:47:51,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:47:51,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:47:51,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:47:51,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:47:51,070 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 04:47:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:51,145 INFO L93 Difference]: Finished difference Result 192 states and 327 transitions. [2023-04-01 04:47:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:47:51,147 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 04:47:51,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:51,158 INFO L225 Difference]: With dead ends: 192 [2023-04-01 04:47:51,158 INFO L226 Difference]: Without dead ends: 90 [2023-04-01 04:47:51,164 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 04:47:51,167 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 04:47:51,168 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 04:47:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-01 04:47:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-04-01 04:47:51,207 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 04:47:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2023-04-01 04:47:51,216 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 12 [2023-04-01 04:47:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:51,218 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2023-04-01 04:47:51,218 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 04:47:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2023-04-01 04:47:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 04:47:51,221 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:51,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:47:51,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:47:51,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:51,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1762023615, now seen corresponding path program 1 times [2023-04-01 04:47:51,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:51,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605285575] [2023-04-01 04:47:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:51,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:47:51,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:51,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605285575] [2023-04-01 04:47:51,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605285575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:47:51,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:47:51,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:47:51,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028173501] [2023-04-01 04:47:51,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:47:51,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:47:51,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:51,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:47:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:47:51,331 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 04:47:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:51,398 INFO L93 Difference]: Finished difference Result 175 states and 215 transitions. [2023-04-01 04:47:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:47:51,399 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 04:47:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:51,400 INFO L225 Difference]: With dead ends: 175 [2023-04-01 04:47:51,400 INFO L226 Difference]: Without dead ends: 92 [2023-04-01 04:47:51,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:47:51,408 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 04:47:51,408 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 04:47:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-04-01 04:47:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-04-01 04:47:51,428 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 04:47:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-04-01 04:47:51,452 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 13 [2023-04-01 04:47:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:51,453 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-04-01 04:47:51,453 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 04:47:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-04-01 04:47:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 04:47:51,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:51,458 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:47:51,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:47:51,459 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:51,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 598701301, now seen corresponding path program 1 times [2023-04-01 04:47:51,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:51,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291626851] [2023-04-01 04:47:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:51,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:51,723 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 04:47:51,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:51,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291626851] [2023-04-01 04:47:51,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291626851] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:47:51,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:47:51,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:47:51,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223614145] [2023-04-01 04:47:51,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:47:51,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:47:51,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:51,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:47:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:47:51,726 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 04:47:51,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:51,920 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2023-04-01 04:47:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:47:51,921 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 04:47:51,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:51,924 INFO L225 Difference]: With dead ends: 134 [2023-04-01 04:47:51,925 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 04:47:51,925 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 04:47:51,926 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 04:47:51,926 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 04:47:51,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 04:47:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2023-04-01 04:47:51,950 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 04:47:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2023-04-01 04:47:51,950 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 15 [2023-04-01 04:47:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:51,951 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2023-04-01 04:47:51,951 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 04:47:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2023-04-01 04:47:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:47:51,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:51,951 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 04:47:51,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:47:51,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:51,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1491454638, now seen corresponding path program 1 times [2023-04-01 04:47:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:51,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307912541] [2023-04-01 04:47:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:51,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:52,094 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 04:47:52,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307912541] [2023-04-01 04:47:52,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307912541] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:47:52,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:47:52,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:47:52,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462466846] [2023-04-01 04:47:52,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:47:52,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:47:52,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:47:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:47:52,097 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 04:47:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:52,279 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2023-04-01 04:47:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:47:52,280 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 04:47:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:52,280 INFO L225 Difference]: With dead ends: 97 [2023-04-01 04:47:52,281 INFO L226 Difference]: Without dead ends: 94 [2023-04-01 04:47:52,281 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 04:47:52,282 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 04:47:52,282 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 04:47:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-01 04:47:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-04-01 04:47:52,295 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 04:47:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2023-04-01 04:47:52,296 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 22 [2023-04-01 04:47:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:52,296 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2023-04-01 04:47:52,296 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 04:47:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2023-04-01 04:47:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:47:52,297 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:52,297 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 04:47:52,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:47:52,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:52,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1816870628, now seen corresponding path program 1 times [2023-04-01 04:47:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:52,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562110350] [2023-04-01 04:47:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:52,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:52,441 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 04:47:52,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:52,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562110350] [2023-04-01 04:47:52,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562110350] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:47:52,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:47:52,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:47:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783080422] [2023-04-01 04:47:52,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:47:52,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:47:52,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:52,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:47:52,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:47:52,445 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 04:47:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:52,640 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2023-04-01 04:47:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:47:52,641 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 04:47:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:52,642 INFO L225 Difference]: With dead ends: 96 [2023-04-01 04:47:52,642 INFO L226 Difference]: Without dead ends: 93 [2023-04-01 04:47:52,642 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 04:47:52,646 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 04:47:52,647 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 04:47:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-01 04:47:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-04-01 04:47:52,655 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 04:47:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2023-04-01 04:47:52,656 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 22 [2023-04-01 04:47:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:52,656 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2023-04-01 04:47:52,656 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 04:47:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2023-04-01 04:47:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:47:52,663 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:52,664 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 04:47:52,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:47:52,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:52,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash 251895696, now seen corresponding path program 1 times [2023-04-01 04:47:52,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:52,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015831211] [2023-04-01 04:47:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:52,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:52,870 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 04:47:52,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:52,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015831211] [2023-04-01 04:47:52,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015831211] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:47:52,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:47:52,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 04:47:52,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802595733] [2023-04-01 04:47:52,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:47:52,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:47:52,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:52,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:47:52,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:47:52,873 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 04:47:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:53,113 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2023-04-01 04:47:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:47:53,114 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 04:47:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:53,115 INFO L225 Difference]: With dead ends: 126 [2023-04-01 04:47:53,115 INFO L226 Difference]: Without dead ends: 123 [2023-04-01 04:47:53,115 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 04:47:53,116 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 91 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:47:53,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:47:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-01 04:47:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2023-04-01 04:47:53,135 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 04:47:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-04-01 04:47:53,136 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 25 [2023-04-01 04:47:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:53,136 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-04-01 04:47:53,136 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 04:47:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-04-01 04:47:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:47:53,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:53,137 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 04:47:53,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:47:53,137 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:53,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:53,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1038832177, now seen corresponding path program 1 times [2023-04-01 04:47:53,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:53,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974583175] [2023-04-01 04:47:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:53,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:53,308 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 04:47:53,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:53,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974583175] [2023-04-01 04:47:53,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974583175] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:47:53,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:47:53,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 04:47:53,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088561186] [2023-04-01 04:47:53,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:47:53,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:47:53,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:53,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:47:53,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:47:53,311 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 04:47:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:53,544 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2023-04-01 04:47:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:47:53,545 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 04:47:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:53,546 INFO L225 Difference]: With dead ends: 125 [2023-04-01 04:47:53,546 INFO L226 Difference]: Without dead ends: 122 [2023-04-01 04:47:53,546 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 04:47:53,547 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 89 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:47:53,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:47:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-04-01 04:47:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2023-04-01 04:47:53,558 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 04:47:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2023-04-01 04:47:53,558 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 25 [2023-04-01 04:47:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:53,559 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2023-04-01 04:47:53,559 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 04:47:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2023-04-01 04:47:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 04:47:53,560 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:53,560 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 04:47:53,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:47:53,560 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:53,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:53,560 INFO L85 PathProgramCache]: Analyzing trace with hash 694641243, now seen corresponding path program 1 times [2023-04-01 04:47:53,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:53,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769282791] [2023-04-01 04:47:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:53,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:53,989 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 04:47:53,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:53,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769282791] [2023-04-01 04:47:53,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769282791] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:47:53,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:47:53,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 04:47:53,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262750492] [2023-04-01 04:47:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:47:53,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:47:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:47:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:47:53,991 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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 04:47:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:54,216 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2023-04-01 04:47:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:47:54,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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 28 [2023-04-01 04:47:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:54,219 INFO L225 Difference]: With dead ends: 124 [2023-04-01 04:47:54,219 INFO L226 Difference]: Without dead ends: 121 [2023-04-01 04:47:54,219 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 04:47:54,220 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 84 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 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, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:47:54,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:47:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-01 04:47:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2023-04-01 04:47:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 96 states have internal predecessors, (102), 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 04:47:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2023-04-01 04:47:54,232 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 28 [2023-04-01 04:47:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:54,232 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2023-04-01 04:47:54,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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 04:47:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2023-04-01 04:47:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 04:47:54,235 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:54,235 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 04:47:54,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 04:47:54,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:54,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1846756687, now seen corresponding path program 1 times [2023-04-01 04:47:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:54,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805043794] [2023-04-01 04:47:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:54,609 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 04:47:54,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:54,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805043794] [2023-04-01 04:47:54,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805043794] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:47:54,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:47:54,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 04:47:54,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049208350] [2023-04-01 04:47:54,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:47:54,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:47:54,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:54,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:47:54,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:47:54,611 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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 04:47:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:54,827 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2023-04-01 04:47:54,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:47:54,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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 28 [2023-04-01 04:47:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:54,828 INFO L225 Difference]: With dead ends: 123 [2023-04-01 04:47:54,828 INFO L226 Difference]: Without dead ends: 120 [2023-04-01 04:47:54,829 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 04:47:54,829 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 82 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 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, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:47:54,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:47:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-04-01 04:47:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2023-04-01 04:47:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.206896551724138) internal successors, (105), 99 states have internal predecessors, (105), 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 04:47:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2023-04-01 04:47:54,843 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 28 [2023-04-01 04:47:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:54,843 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2023-04-01 04:47:54,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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 04:47:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2023-04-01 04:47:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:47:54,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:54,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:47:54,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 04:47:54,845 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:54,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:54,845 INFO L85 PathProgramCache]: Analyzing trace with hash -299663970, now seen corresponding path program 1 times [2023-04-01 04:47:54,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:54,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804877058] [2023-04-01 04:47:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:54,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:47:54,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:54,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804877058] [2023-04-01 04:47:54,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804877058] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:47:54,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928478844] [2023-04-01 04:47:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:54,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:47:54,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:47:54,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:47:54,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:47:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:55,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 04:47:55,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:47:55,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-04-01 04:47:55,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-04-01 04:47:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:47:55,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:47:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:47:55,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928478844] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:47:55,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1880436615] [2023-04-01 04:47:55,567 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 04:47:55,567 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:47:55,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:47:55,575 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:47:55,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:47:55,642 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:47:55,833 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_before with input of size 16 for LOIs [2023-04-01 04:47:55,980 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 04:47:57,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:47:57,483 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 9 for LOIs [2023-04-01 04:47:57,484 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:47:58,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3513#(and (<= 1 |#StackHeapBarrier|) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:47:58,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:47:58,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:47:58,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-04-01 04:47:58,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448848059] [2023-04-01 04:47:58,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:47:58,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:47:58,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:58,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:47:58,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:47:58,003 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 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 04:47:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:58,157 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2023-04-01 04:47:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:47:58,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 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 33 [2023-04-01 04:47:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:58,159 INFO L225 Difference]: With dead ends: 113 [2023-04-01 04:47:58,159 INFO L226 Difference]: Without dead ends: 109 [2023-04-01 04:47:58,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-04-01 04:47:58,160 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 31 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:47:58,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 255 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:47:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-01 04:47:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-01 04:47:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 97 states have internal predecessors, (103), 16 states have call successors, (16), 8 states have call predecessors, (16), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:47:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2023-04-01 04:47:58,173 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 33 [2023-04-01 04:47:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:58,173 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2023-04-01 04:47:58,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 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 04:47:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2023-04-01 04:47:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 04:47:58,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:58,174 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:47:58,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:47:58,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 04:47:58,381 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:58,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:58,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1638158787, now seen corresponding path program 1 times [2023-04-01 04:47:58,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:58,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542427278] [2023-04-01 04:47:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:58,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:58,457 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 04:47:58,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:58,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542427278] [2023-04-01 04:47:58,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542427278] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:47:58,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:47:58,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:47:58,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644293390] [2023-04-01 04:47:58,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:47:58,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:47:58,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:47:58,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:47:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:47:58,460 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:47:58,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:47:58,554 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2023-04-01 04:47:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:47:58,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-04-01 04:47:58,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:47:58,559 INFO L225 Difference]: With dead ends: 134 [2023-04-01 04:47:58,559 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 04:47:58,559 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 04:47:58,560 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 34 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:47:58,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 329 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:47:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 04:47:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 114. [2023-04-01 04:47:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 100 states have internal predecessors, (108), 17 states have call successors, (17), 9 states have call predecessors, (17), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:47:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2023-04-01 04:47:58,572 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 36 [2023-04-01 04:47:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:47:58,573 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2023-04-01 04:47:58,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:47:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2023-04-01 04:47:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 04:47:58,575 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:47:58,575 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:47:58,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 04:47:58,576 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:47:58,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:47:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1193814081, now seen corresponding path program 1 times [2023-04-01 04:47:58,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:47:58,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246018116] [2023-04-01 04:47:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:58,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:47:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:58,839 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 04:47:58,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:47:58,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246018116] [2023-04-01 04:47:58,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246018116] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:47:58,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936386366] [2023-04-01 04:47:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:47:58,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:47:58,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:47:58,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:47:58,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:47:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:47:58,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 04:47:58,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:47:59,032 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 04:47:59,038 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 04:47:59,216 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 04:47:59,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:47:59,297 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 04:47:59,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936386366] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:47:59,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [646407057] [2023-04-01 04:47:59,303 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-01 04:47:59,304 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:47:59,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:47:59,304 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:47:59,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:47:59,356 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:47:59,531 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_after with input of size 23 for LOIs [2023-04-01 04:47:59,547 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_before with input of size 16 for LOIs [2023-04-01 04:47:59,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:47:59,610 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:48:00,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [646407057] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:48:00,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:48:00,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [7, 8, 7] total 33 [2023-04-01 04:48:00,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787223568] [2023-04-01 04:48:00,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:48:00,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 04:48:00,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:48:00,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 04:48:00,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 04:48:00,630 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:48:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:48:03,776 INFO L93 Difference]: Finished difference Result 224 states and 271 transitions. [2023-04-01 04:48:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-01 04:48:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-04-01 04:48:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:48:03,778 INFO L225 Difference]: With dead ends: 224 [2023-04-01 04:48:03,778 INFO L226 Difference]: Without dead ends: 182 [2023-04-01 04:48:03,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=517, Invalid=2905, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 04:48:03,781 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 620 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:48:03,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 7 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 04:48:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-04-01 04:48:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 122. [2023-04-01 04:48:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 107 states have internal predecessors, (115), 17 states have call successors, (17), 9 states have call predecessors, (17), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 04:48:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2023-04-01 04:48:03,807 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 39 [2023-04-01 04:48:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:48:03,807 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2023-04-01 04:48:03,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:48:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2023-04-01 04:48:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 04:48:03,808 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:48:03,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:48:03,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:48:04,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 04:48:04,016 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:48:04,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:48:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash 309961835, now seen corresponding path program 1 times [2023-04-01 04:48:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:48:04,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599159270] [2023-04-01 04:48:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:04,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:48:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:48:04,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:48:04,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599159270] [2023-04-01 04:48:04,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599159270] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:48:04,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126821127] [2023-04-01 04:48:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:04,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:48:04,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:48:04,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:48:04,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:48:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:04,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 04:48:04,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:48:04,490 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 04:48:04,494 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 04:48:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:48:04,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:48:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:48:04,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126821127] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:48:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551075954] [2023-04-01 04:48:04,652 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 04:48:04,652 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:48:04,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:48:04,653 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:48:04,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:48:04,670 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:48:04,757 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_before with input of size 16 for LOIs [2023-04-01 04:48:04,855 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 04:48:06,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:48:06,124 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 35 for LOIs [2023-04-01 04:48:06,127 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:48:10,720 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5319#(and (<= 1 |#StackHeapBarrier|) (exists ((v_inspect_before_~shape.base_BEFORE_CALL_2 Int) (v_inspect_before_~shape.offset_BEFORE_CALL_2 Int)) (and (or (not (= (select (select |#memory_$Pointer$.offset| v_inspect_before_~shape.base_BEFORE_CALL_2) (+ 4 v_inspect_before_~shape.offset_BEFORE_CALL_2)) 0)) (not (= (select (select |#memory_$Pointer$.base| v_inspect_before_~shape.base_BEFORE_CALL_2) (+ 4 v_inspect_before_~shape.offset_BEFORE_CALL_2)) 0))) (= (select (select |#memory_$Pointer$.offset| v_inspect_before_~shape.base_BEFORE_CALL_2) v_inspect_before_~shape.offset_BEFORE_CALL_2) 0) (= (select (select |#memory_$Pointer$.base| v_inspect_before_~shape.base_BEFORE_CALL_2) v_inspect_before_~shape.offset_BEFORE_CALL_2) 0) (or (not (= v_inspect_before_~shape.offset_BEFORE_CALL_2 0)) (not (= v_inspect_before_~shape.base_BEFORE_CALL_2 0))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:48:10,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:48:10,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:48:10,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-04-01 04:48:10,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558454718] [2023-04-01 04:48:10,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:48:10,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 04:48:10,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:48:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 04:48:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=769, Unknown=2, NotChecked=0, Total=870 [2023-04-01 04:48:10,722 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 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 04:48:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:48:11,023 INFO L93 Difference]: Finished difference Result 238 states and 272 transitions. [2023-04-01 04:48:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:48:11,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 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 39 [2023-04-01 04:48:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:48:11,025 INFO L225 Difference]: With dead ends: 238 [2023-04-01 04:48:11,025 INFO L226 Difference]: Without dead ends: 147 [2023-04-01 04:48:11,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=114, Invalid=876, Unknown=2, NotChecked=0, Total=992 [2023-04-01 04:48:11,026 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 53 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:48:11,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 568 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:48:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-01 04:48:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2023-04-01 04:48:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 118 states have (on average 1.152542372881356) internal successors, (136), 128 states have internal predecessors, (136), 18 states have call successors, (18), 10 states have call predecessors, (18), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 04:48:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2023-04-01 04:48:11,056 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 39 [2023-04-01 04:48:11,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:48:11,056 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2023-04-01 04:48:11,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 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 04:48:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2023-04-01 04:48:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 04:48:11,057 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:48:11,057 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:48:11,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:48:11,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:48:11,268 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:48:11,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:48:11,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1825662294, now seen corresponding path program 1 times [2023-04-01 04:48:11,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:48:11,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601702968] [2023-04-01 04:48:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:11,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:48:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:11,445 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 04:48:11,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:48:11,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601702968] [2023-04-01 04:48:11,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601702968] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:48:11,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:48:11,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 04:48:11,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044536480] [2023-04-01 04:48:11,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:48:11,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 04:48:11,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:48:11,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 04:48:11,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:48:11,446 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:48:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:48:11,664 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2023-04-01 04:48:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:48:11,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2023-04-01 04:48:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:48:11,666 INFO L225 Difference]: With dead ends: 160 [2023-04-01 04:48:11,666 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 04:48:11,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:48:11,667 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 41 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:48:11,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 381 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:48:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 04:48:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2023-04-01 04:48:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 131 states have internal predecessors, (139), 18 states have call successors, (18), 10 states have call predecessors, (18), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 04:48:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 165 transitions. [2023-04-01 04:48:11,718 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 165 transitions. Word has length 42 [2023-04-01 04:48:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:48:11,718 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 165 transitions. [2023-04-01 04:48:11,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:48:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 165 transitions. [2023-04-01 04:48:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:48:11,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:48:11,719 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:48:11,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 04:48:11,719 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:48:11,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:48:11,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1369900769, now seen corresponding path program 2 times [2023-04-01 04:48:11,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:48:11,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54510531] [2023-04-01 04:48:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:11,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:48:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:48:12,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:48:12,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54510531] [2023-04-01 04:48:12,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54510531] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:48:12,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807285038] [2023-04-01 04:48:12,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:48:12,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:48:12,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:48:12,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:48:12,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:48:12,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:48:12,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:48:12,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 75 conjunts are in the unsatisfiable core [2023-04-01 04:48:12,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:48:12,503 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 04:48:12,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-04-01 04:48:12,510 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 04:48:12,516 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 04:48:12,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:48:12,612 INFO L321 Elim1Store]: treesize reduction 73, result has 33.0 percent of original size [2023-04-01 04:48:12,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 102 [2023-04-01 04:48:12,629 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 04:48:12,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-04-01 04:48:12,698 INFO L321 Elim1Store]: treesize reduction 73, result has 33.0 percent of original size [2023-04-01 04:48:12,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 102 [2023-04-01 04:48:12,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2023-04-01 04:48:12,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 15 [2023-04-01 04:48:12,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 15 [2023-04-01 04:48:12,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2023-04-01 04:48:12,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 18 [2023-04-01 04:48:13,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 18 [2023-04-01 04:48:13,093 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:48:13,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2023-04-01 04:48:13,116 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:48:13,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 60 [2023-04-01 04:48:13,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 04:48:17,213 INFO L321 Elim1Store]: treesize reduction 48, result has 90.8 percent of original size [2023-04-01 04:48:17,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 520 treesize of output 948 [2023-04-01 04:48:18,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 04:48:36,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 04:48:41,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3