/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 [2023-04-02 21:25:47,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:25:47,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:25:47,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:25:47,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:25:47,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:25:47,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:25:47,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:25:47,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:25:47,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:25:47,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:25:47,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:25:47,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:25:47,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:25:47,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:25:47,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:25:47,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:25:47,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:25:47,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:25:47,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:25:47,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:25:47,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:25:47,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:25:47,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:25:47,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:25:47,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:25:47,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:25:47,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:25:47,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:25:47,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:25:47,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:25:47,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:25:47,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:25:47,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:25:47,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:25:47,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:25:47,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:25:47,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:25:47,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:25:47,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:25:47,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:25:47,620 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 [2023-04-02 21:25:47,655 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:25:47,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:25:47,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:25:47,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:25:47,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:25:47,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:25:47,656 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:25:47,656 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:25:47,657 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:25:47,657 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:25:47,657 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:25:47,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:25:47,657 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:25:47,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:25:47,657 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:25:47,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:25:47,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:25:47,658 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:25:47,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:25:47,658 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:25:47,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:25:47,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:25:47,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:25:47,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:25:47,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:25:47,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:25:47,659 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:25:47,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:25:47,659 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:25:47,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:25:47,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:25:47,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:25:47,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:25:47,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:25:47,660 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:25:47,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:25:47,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:25:47,663 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:25:47,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:25:47,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:25:47,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:25:47,663 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:25:47,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:25:47,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:25:47,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:25:47,942 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:25:47,943 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:25:47,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-04-02 21:25:49,066 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:25:49,354 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:25:49,354 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-04-02 21:25:49,371 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9abfd1877/488b5f278b40490198828f150b831bef/FLAG6cc19564a [2023-04-02 21:25:49,381 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9abfd1877/488b5f278b40490198828f150b831bef [2023-04-02 21:25:49,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:25:49,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:25:49,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:25:49,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:25:49,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:25:49,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd0a739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49, skipping insertion in model container [2023-04-02 21:25:49,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:25:49,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:25:49,638 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] [2023-04-02 21:25:49,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:25:49,669 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:25:49,711 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] [2023-04-02 21:25:49,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:25:49,764 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:25:49,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49 WrapperNode [2023-04-02 21:25:49,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:25:49,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:25:49,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:25:49,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:25:49,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,833 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:25:49,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:25:49,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:25:49,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:25:49,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49" (1/1) ... [2023-04-02 21:25:49,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:25:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:25:49,881 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) [2023-04-02 21:25:49,894 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 [2023-04-02 21:25:49,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:25:49,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:25:49,924 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:25:49,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-02 21:25:49,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-02 21:25:49,928 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-04-02 21:25:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2023-04-02 21:25:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2023-04-02 21:25:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2023-04-02 21:25:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2023-04-02 21:25:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2023-04-02 21:25:49,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:25:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:25:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:25:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 21:25:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 21:25:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:25:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:25:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-02 21:25:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-02 21:25:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 21:25:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 21:25:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 21:25:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 21:25:49,934 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 21:25:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 21:25:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 21:25:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 21:25:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 21:25:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 21:25:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 21:25:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 21:25:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 21:25:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 21:25:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 21:25:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 21:25:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 21:25:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 21:25:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 21:25:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 21:25:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 21:25:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 21:25:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 21:25:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 21:25:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 21:25:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 21:25:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 21:25:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 21:25:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 21:25:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 21:25:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 21:25:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 21:25:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 21:25:49,937 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 21:25:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 21:25:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 21:25:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 21:25:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 21:25:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 21:25:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 21:25:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 21:25:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 21:25:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 21:25:49,938 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 21:25:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 21:25:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 21:25:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 21:25:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 21:25:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 21:25:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 21:25:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 21:25:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 21:25:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 21:25:49,939 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 21:25:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 21:25:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 21:25:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 21:25:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 21:25:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 21:25:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 21:25:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 21:25:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 21:25:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 21:25:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 21:25:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 21:25:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 21:25:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 21:25:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 21:25:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 21:25:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 21:25:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 21:25:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 21:25:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 21:25:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 21:25:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 21:25:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 21:25:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 21:25:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 21:25:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 21:25:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 21:25:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 21:25:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 21:25:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 21:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 21:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 21:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 21:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 21:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 21:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 21:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 21:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 21:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 21:25:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 21:25:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 21:25:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 21:25:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 21:25:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 21:25:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 21:25:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 21:25:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:25:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-04-02 21:25:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2023-04-02 21:25:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 21:25:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 21:25:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2023-04-02 21:25:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 21:25:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:25:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:25:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2023-04-02 21:25:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2023-04-02 21:25:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2023-04-02 21:25:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:25:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 21:25:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:25:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:25:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:25:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:25:50,237 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:25:50,239 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:25:50,557 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:25:50,625 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:25:50,625 INFO L302 CfgBuilder]: Removed 33 assume(true) statements. [2023-04-02 21:25:50,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:25:50 BoogieIcfgContainer [2023-04-02 21:25:50,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:25:50,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:25:50,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:25:50,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:25:50,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:25:49" (1/3) ... [2023-04-02 21:25:50,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c78d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:25:50, skipping insertion in model container [2023-04-02 21:25:50,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:25:49" (2/3) ... [2023-04-02 21:25:50,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c78d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:25:50, skipping insertion in model container [2023-04-02 21:25:50,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:25:50" (3/3) ... [2023-04-02 21:25:50,639 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2023-04-02 21:25:50,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:25:50,655 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:25:50,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:25:50,707 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;@274f5734, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:25:50,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:25:50,711 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) [2023-04-02 21:25:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 21:25:50,716 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:50,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:25:50,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:50,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:50,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1195293700, now seen corresponding path program 1 times [2023-04-02 21:25:50,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:50,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698227585] [2023-04-02 21:25:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:50,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:50,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698227585] [2023-04-02 21:25:50,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698227585] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:50,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:25:50,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 21:25:50,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215113876] [2023-04-02 21:25:50,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:50,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 21:25:50,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:50,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 21:25:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 21:25:50,933 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) [2023-04-02 21:25:51,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:51,016 INFO L93 Difference]: Finished difference Result 192 states and 327 transitions. [2023-04-02 21:25:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 21:25:51,018 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 [2023-04-02 21:25:51,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:51,027 INFO L225 Difference]: With dead ends: 192 [2023-04-02 21:25:51,027 INFO L226 Difference]: Without dead ends: 90 [2023-04-02 21:25:51,032 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 [2023-04-02 21:25:51,037 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 [2023-04-02 21:25:51,038 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] [2023-04-02 21:25:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-02 21:25:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-04-02 21:25:51,071 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) [2023-04-02 21:25:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2023-04-02 21:25:51,073 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 12 [2023-04-02 21:25:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:51,074 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2023-04-02 21:25:51,074 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) [2023-04-02 21:25:51,076 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2023-04-02 21:25:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 21:25:51,077 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:51,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:25:51,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:25:51,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:51,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1762023615, now seen corresponding path program 1 times [2023-04-02 21:25:51,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:51,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630325993] [2023-04-02 21:25:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:51,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:51,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630325993] [2023-04-02 21:25:51,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630325993] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:51,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:25:51,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:25:51,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49185670] [2023-04-02 21:25:51,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:51,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:25:51,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:51,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:25:51,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:25:51,193 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) [2023-04-02 21:25:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:51,281 INFO L93 Difference]: Finished difference Result 175 states and 215 transitions. [2023-04-02 21:25:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:25:51,281 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 [2023-04-02 21:25:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:51,283 INFO L225 Difference]: With dead ends: 175 [2023-04-02 21:25:51,283 INFO L226 Difference]: Without dead ends: 92 [2023-04-02 21:25:51,284 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 [2023-04-02 21:25:51,285 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:25:51,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 195 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:25:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-04-02 21:25:51,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-04-02 21:25:51,300 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) [2023-04-02 21:25:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-04-02 21:25:51,301 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 13 [2023-04-02 21:25:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:51,302 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-04-02 21:25:51,302 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) [2023-04-02 21:25:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-04-02 21:25:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 21:25:51,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:51,303 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:25:51,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 21:25:51,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:51,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:51,305 INFO L85 PathProgramCache]: Analyzing trace with hash 598701301, now seen corresponding path program 1 times [2023-04-02 21:25:51,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:51,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879511945] [2023-04-02 21:25:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:51,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:51,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:51,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879511945] [2023-04-02 21:25:51,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879511945] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:51,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:25:51,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 21:25:51,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431132014] [2023-04-02 21:25:51,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:51,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:25:51,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:25:51,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:25:51,480 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) [2023-04-02 21:25:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:51,620 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2023-04-02 21:25:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:25:51,621 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 [2023-04-02 21:25:51,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:51,625 INFO L225 Difference]: With dead ends: 134 [2023-04-02 21:25:51,625 INFO L226 Difference]: Without dead ends: 129 [2023-04-02 21:25:51,625 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 [2023-04-02 21:25:51,626 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 [2023-04-02 21:25:51,627 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] [2023-04-02 21:25:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-02 21:25:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2023-04-02 21:25:51,643 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) [2023-04-02 21:25:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2023-04-02 21:25:51,644 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 15 [2023-04-02 21:25:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:51,644 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2023-04-02 21:25:51,648 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) [2023-04-02 21:25:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2023-04-02 21:25:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 21:25:51,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:51,649 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] [2023-04-02 21:25:51,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 21:25:51,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:51,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1491454638, now seen corresponding path program 1 times [2023-04-02 21:25:51,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:51,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659134920] [2023-04-02 21:25:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:51,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:25:51,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659134920] [2023-04-02 21:25:51,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659134920] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:51,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:25:51,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 21:25:51,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929308916] [2023-04-02 21:25:51,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:51,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:25:51,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:51,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:25:51,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:25:51,830 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) [2023-04-02 21:25:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:51,968 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2023-04-02 21:25:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:25:51,969 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 [2023-04-02 21:25:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:51,970 INFO L225 Difference]: With dead ends: 97 [2023-04-02 21:25:51,970 INFO L226 Difference]: Without dead ends: 94 [2023-04-02 21:25:51,971 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 [2023-04-02 21:25:51,973 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 [2023-04-02 21:25:51,973 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] [2023-04-02 21:25:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-02 21:25:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-04-02 21:25:51,982 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) [2023-04-02 21:25:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2023-04-02 21:25:51,983 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 22 [2023-04-02 21:25:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:51,983 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2023-04-02 21:25:51,983 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) [2023-04-02 21:25:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2023-04-02 21:25:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 21:25:51,984 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:51,984 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] [2023-04-02 21:25:51,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 21:25:51,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:51,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:51,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1816870628, now seen corresponding path program 1 times [2023-04-02 21:25:51,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:51,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39586352] [2023-04-02 21:25:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:51,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:25:52,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:52,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39586352] [2023-04-02 21:25:52,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39586352] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:52,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:25:52,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 21:25:52,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868224767] [2023-04-02 21:25:52,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:52,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:25:52,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:52,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:25:52,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:25:52,082 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) [2023-04-02 21:25:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:52,218 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2023-04-02 21:25:52,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:25:52,219 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 [2023-04-02 21:25:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:52,220 INFO L225 Difference]: With dead ends: 96 [2023-04-02 21:25:52,220 INFO L226 Difference]: Without dead ends: 93 [2023-04-02 21:25:52,221 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 [2023-04-02 21:25:52,223 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 [2023-04-02 21:25:52,223 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] [2023-04-02 21:25:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-02 21:25:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-04-02 21:25:52,237 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) [2023-04-02 21:25:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2023-04-02 21:25:52,241 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 22 [2023-04-02 21:25:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:52,241 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2023-04-02 21:25:52,241 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) [2023-04-02 21:25:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2023-04-02 21:25:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 21:25:52,245 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:52,246 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] [2023-04-02 21:25:52,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 21:25:52,247 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:52,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:52,247 INFO L85 PathProgramCache]: Analyzing trace with hash 251895696, now seen corresponding path program 1 times [2023-04-02 21:25:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:52,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730895483] [2023-04-02 21:25:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:52,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:52,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730895483] [2023-04-02 21:25:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730895483] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:52,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:25:52,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 21:25:52,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908813562] [2023-04-02 21:25:52,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:52,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 21:25:52,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:52,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 21:25:52,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 21:25:52,451 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) [2023-04-02 21:25:52,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:52,634 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2023-04-02 21:25:52,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 21:25:52,635 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 [2023-04-02 21:25:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:52,636 INFO L225 Difference]: With dead ends: 126 [2023-04-02 21:25:52,636 INFO L226 Difference]: Without dead ends: 123 [2023-04-02 21:25:52,636 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 [2023-04-02 21:25:52,637 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 91 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:25:52,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:25:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-02 21:25:52,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2023-04-02 21:25:52,648 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) [2023-04-02 21:25:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-04-02 21:25:52,648 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 25 [2023-04-02 21:25:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:52,649 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-04-02 21:25:52,649 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) [2023-04-02 21:25:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-04-02 21:25:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 21:25:52,650 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:52,650 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] [2023-04-02 21:25:52,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 21:25:52,650 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:52,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:52,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1038832177, now seen corresponding path program 1 times [2023-04-02 21:25:52,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:52,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501827426] [2023-04-02 21:25:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:52,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:52,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:52,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501827426] [2023-04-02 21:25:52,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501827426] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:52,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:25:52,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 21:25:52,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458989093] [2023-04-02 21:25:52,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:52,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 21:25:52,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:52,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 21:25:52,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 21:25:52,784 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) [2023-04-02 21:25:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:53,008 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2023-04-02 21:25:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 21:25:53,008 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 [2023-04-02 21:25:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:53,009 INFO L225 Difference]: With dead ends: 125 [2023-04-02 21:25:53,009 INFO L226 Difference]: Without dead ends: 122 [2023-04-02 21:25:53,009 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 [2023-04-02 21:25:53,010 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 [2023-04-02 21:25:53,010 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] [2023-04-02 21:25:53,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-04-02 21:25:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2023-04-02 21:25:53,028 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) [2023-04-02 21:25:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2023-04-02 21:25:53,028 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 25 [2023-04-02 21:25:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:53,029 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2023-04-02 21:25:53,029 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) [2023-04-02 21:25:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2023-04-02 21:25:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 21:25:53,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:53,030 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] [2023-04-02 21:25:53,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 21:25:53,030 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:53,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash 694641243, now seen corresponding path program 1 times [2023-04-02 21:25:53,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:53,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963039834] [2023-04-02 21:25:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:53,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:53,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:53,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963039834] [2023-04-02 21:25:53,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963039834] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:53,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:25:53,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 21:25:53,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255693943] [2023-04-02 21:25:53,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:53,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 21:25:53,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:53,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 21:25:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 21:25:53,425 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) [2023-04-02 21:25:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:53,630 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2023-04-02 21:25:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 21:25:53,631 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 [2023-04-02 21:25:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:53,632 INFO L225 Difference]: With dead ends: 124 [2023-04-02 21:25:53,632 INFO L226 Difference]: Without dead ends: 121 [2023-04-02 21:25:53,633 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 [2023-04-02 21:25:53,633 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 84 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-04-02 21:25:53,634 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] [2023-04-02 21:25:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-02 21:25:53,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2023-04-02 21:25:53,652 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) [2023-04-02 21:25:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2023-04-02 21:25:53,653 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 28 [2023-04-02 21:25:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:53,653 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2023-04-02 21:25:53,654 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) [2023-04-02 21:25:53,654 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2023-04-02 21:25:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 21:25:53,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:53,655 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] [2023-04-02 21:25:53,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 21:25:53,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:53,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1846756687, now seen corresponding path program 1 times [2023-04-02 21:25:53,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:53,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747933762] [2023-04-02 21:25:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:53,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:53,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747933762] [2023-04-02 21:25:53,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747933762] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:53,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:25:53,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 21:25:53,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923851510] [2023-04-02 21:25:53,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:53,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 21:25:53,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:53,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 21:25:53,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 21:25:53,984 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) [2023-04-02 21:25:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:54,179 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2023-04-02 21:25:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 21:25:54,181 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 [2023-04-02 21:25:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:54,182 INFO L225 Difference]: With dead ends: 123 [2023-04-02 21:25:54,182 INFO L226 Difference]: Without dead ends: 120 [2023-04-02 21:25:54,182 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 [2023-04-02 21:25:54,182 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 [2023-04-02 21:25:54,183 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] [2023-04-02 21:25:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-04-02 21:25:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2023-04-02 21:25:54,196 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) [2023-04-02 21:25:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2023-04-02 21:25:54,196 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 28 [2023-04-02 21:25:54,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:54,197 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2023-04-02 21:25:54,197 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) [2023-04-02 21:25:54,198 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2023-04-02 21:25:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 21:25:54,200 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:54,200 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] [2023-04-02 21:25:54,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 21:25:54,200 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:54,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:54,201 INFO L85 PathProgramCache]: Analyzing trace with hash -299663970, now seen corresponding path program 1 times [2023-04-02 21:25:54,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:54,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235444440] [2023-04-02 21:25:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:54,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:25:54,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:54,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235444440] [2023-04-02 21:25:54,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235444440] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:25:54,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655855942] [2023-04-02 21:25:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:54,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:25:54,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:25:54,299 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) [2023-04-02 21:25:54,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 21:25:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:54,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 21:25:54,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:25:54,648 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 [2023-04-02 21:25:54,653 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 [2023-04-02 21:25:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:25:54,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:25:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:25:54,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655855942] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:25:54,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [614825391] [2023-04-02 21:25:54,807 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 21:25:54,807 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:25:54,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:25:54,839 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:25:54,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:25:54,908 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:25:55,132 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_before with input of size 16 for LOIs [2023-04-02 21:25:55,311 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 21:25:56,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:25:56,724 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 9 for LOIs [2023-04-02 21:25:56,726 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:25:57,271 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 [2023-04-02 21:25:57,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:25:57,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:25:57,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-04-02 21:25:57,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925528643] [2023-04-02 21:25:57,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:25:57,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 21:25:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:57,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 21:25:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-04-02 21:25:57,273 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) [2023-04-02 21:25:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:57,415 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2023-04-02 21:25:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:25:57,416 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 [2023-04-02 21:25:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:57,417 INFO L225 Difference]: With dead ends: 113 [2023-04-02 21:25:57,417 INFO L226 Difference]: Without dead ends: 109 [2023-04-02 21:25:57,418 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 [2023-04-02 21:25:57,418 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 [2023-04-02 21:25:57,419 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] [2023-04-02 21:25:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-02 21:25:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-02 21:25:57,430 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) [2023-04-02 21:25:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2023-04-02 21:25:57,431 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 33 [2023-04-02 21:25:57,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:57,431 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2023-04-02 21:25:57,431 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) [2023-04-02 21:25:57,432 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2023-04-02 21:25:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 21:25:57,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:57,437 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] [2023-04-02 21:25:57,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 21:25:57,643 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 [2023-04-02 21:25:57,643 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:57,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1638158787, now seen corresponding path program 1 times [2023-04-02 21:25:57,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:57,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569175772] [2023-04-02 21:25:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:57,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:57,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:57,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569175772] [2023-04-02 21:25:57,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569175772] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:57,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:25:57,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 21:25:57,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162769921] [2023-04-02 21:25:57,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:57,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:25:57,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:57,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:25:57,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:25:57,699 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) [2023-04-02 21:25:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:25:57,785 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2023-04-02 21:25:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:25:57,786 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 [2023-04-02 21:25:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:25:57,787 INFO L225 Difference]: With dead ends: 134 [2023-04-02 21:25:57,787 INFO L226 Difference]: Without dead ends: 131 [2023-04-02 21:25:57,787 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 [2023-04-02 21:25:57,788 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 [2023-04-02 21:25:57,788 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] [2023-04-02 21:25:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-02 21:25:57,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 114. [2023-04-02 21:25:57,798 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) [2023-04-02 21:25:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2023-04-02 21:25:57,799 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 36 [2023-04-02 21:25:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:25:57,799 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2023-04-02 21:25:57,799 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) [2023-04-02 21:25:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2023-04-02 21:25:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 21:25:57,801 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:25:57,801 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] [2023-04-02 21:25:57,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 21:25:57,801 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:25:57,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:25:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1193814081, now seen corresponding path program 1 times [2023-04-02 21:25:57,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:25:57,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334400700] [2023-04-02 21:25:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:57,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:25:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:58,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:25:58,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334400700] [2023-04-02 21:25:58,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334400700] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:25:58,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464970766] [2023-04-02 21:25:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:25:58,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:25:58,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:25:58,076 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) [2023-04-02 21:25:58,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 21:25:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:25:58,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-02 21:25:58,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:25:58,245 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 [2023-04-02 21:25:58,250 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 [2023-04-02 21:25:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:58,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:25:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:25:58,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464970766] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:25:58,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883616270] [2023-04-02 21:25:58,513 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-02 21:25:58,514 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:25:58,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:25:58,514 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:25:58,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:25:58,533 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:25:58,699 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_after with input of size 23 for LOIs [2023-04-02 21:25:58,712 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_before with input of size 16 for LOIs [2023-04-02 21:25:58,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:25:58,764 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:25:59,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [883616270] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:25:59,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:25:59,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [7, 8, 7] total 33 [2023-04-02 21:25:59,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551323284] [2023-04-02 21:25:59,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:25:59,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 21:25:59,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:25:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 21:25:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 21:25:59,734 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) [2023-04-02 21:26:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:26:02,913 INFO L93 Difference]: Finished difference Result 224 states and 271 transitions. [2023-04-02 21:26:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 21:26:02,914 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 [2023-04-02 21:26:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:26:02,915 INFO L225 Difference]: With dead ends: 224 [2023-04-02 21:26:02,915 INFO L226 Difference]: Without dead ends: 182 [2023-04-02 21:26:02,917 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 [2023-04-02 21:26:02,917 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 [2023-04-02 21:26:02,918 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] [2023-04-02 21:26:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-04-02 21:26:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 122. [2023-04-02 21:26:02,945 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) [2023-04-02 21:26:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2023-04-02 21:26:02,945 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 39 [2023-04-02 21:26:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:26:02,946 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2023-04-02 21:26:02,946 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) [2023-04-02 21:26:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2023-04-02 21:26:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 21:26:02,946 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:26:02,947 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] [2023-04-02 21:26:02,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 21:26:03,147 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 [2023-04-02 21:26:03,147 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:26:03,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:26:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash 309961835, now seen corresponding path program 1 times [2023-04-02 21:26:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:26:03,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7217148] [2023-04-02 21:26:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:26:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:26:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:26:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 21:26:03,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:26:03,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7217148] [2023-04-02 21:26:03,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7217148] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:26:03,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468296783] [2023-04-02 21:26:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:26:03,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:26:03,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:26:03,402 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) [2023-04-02 21:26:03,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 21:26:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:26:03,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 21:26:03,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:26:03,559 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 [2023-04-02 21:26:03,563 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 [2023-04-02 21:26:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 21:26:03,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:26:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 21:26:03,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468296783] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:26:03,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938314577] [2023-04-02 21:26:03,713 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 21:26:03,713 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:26:03,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:26:03,714 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:26:03,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:26:03,731 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:26:03,823 INFO L197 IcfgInterpreter]: Interpreting procedure inspect_before with input of size 16 for LOIs [2023-04-02 21:26:03,956 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 21:26:05,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:26:05,168 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 35 for LOIs [2023-04-02 21:26:05,171 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:26:09,767 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 [2023-04-02 21:26:09,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:26:09,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:26:09,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-04-02 21:26:09,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209113760] [2023-04-02 21:26:09,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:26:09,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 21:26:09,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:26:09,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 21:26:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=769, Unknown=2, NotChecked=0, Total=870 [2023-04-02 21:26:09,785 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) [2023-04-02 21:26:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:26:10,069 INFO L93 Difference]: Finished difference Result 238 states and 272 transitions. [2023-04-02 21:26:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 21:26:10,069 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 [2023-04-02 21:26:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:26:10,070 INFO L225 Difference]: With dead ends: 238 [2023-04-02 21:26:10,071 INFO L226 Difference]: Without dead ends: 147 [2023-04-02 21:26:10,071 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 [2023-04-02 21:26:10,072 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 [2023-04-02 21:26:10,072 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] [2023-04-02 21:26:10,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-02 21:26:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2023-04-02 21:26:10,097 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) [2023-04-02 21:26:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2023-04-02 21:26:10,098 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 39 [2023-04-02 21:26:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:26:10,098 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2023-04-02 21:26:10,098 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) [2023-04-02 21:26:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2023-04-02 21:26:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 21:26:10,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:26:10,099 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] [2023-04-02 21:26:10,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 21:26:10,304 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 [2023-04-02 21:26:10,305 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:26:10,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:26:10,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1825662294, now seen corresponding path program 1 times [2023-04-02 21:26:10,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:26:10,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159753956] [2023-04-02 21:26:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:26:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:26:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:26:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:26:10,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:26:10,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159753956] [2023-04-02 21:26:10,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159753956] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:26:10,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:26:10,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 21:26:10,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361791689] [2023-04-02 21:26:10,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:26:10,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 21:26:10,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:26:10,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 21:26:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 21:26:10,468 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) [2023-04-02 21:26:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:26:10,699 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2023-04-02 21:26:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 21:26:10,699 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 [2023-04-02 21:26:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:26:10,700 INFO L225 Difference]: With dead ends: 160 [2023-04-02 21:26:10,700 INFO L226 Difference]: Without dead ends: 157 [2023-04-02 21:26:10,701 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 [2023-04-02 21:26:10,701 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 [2023-04-02 21:26:10,701 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] [2023-04-02 21:26:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-02 21:26:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2023-04-02 21:26:10,728 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) [2023-04-02 21:26:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 165 transitions. [2023-04-02 21:26:10,729 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 165 transitions. Word has length 42 [2023-04-02 21:26:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:26:10,730 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 165 transitions. [2023-04-02 21:26:10,730 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) [2023-04-02 21:26:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 165 transitions. [2023-04-02 21:26:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 21:26:10,730 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:26:10,730 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] [2023-04-02 21:26:10,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 21:26:10,731 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:26:10,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:26:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1369900769, now seen corresponding path program 2 times [2023-04-02 21:26:10,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:26:10,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624069065] [2023-04-02 21:26:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:26:10,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:26:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:26:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:26:11,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:26:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624069065] [2023-04-02 21:26:11,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624069065] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:26:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806502610] [2023-04-02 21:26:11,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:26:11,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:26:11,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:26:11,321 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) [2023-04-02 21:26:11,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 21:26:11,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 21:26:11,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:26:11,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 75 conjunts are in the unsatisfiable core [2023-04-02 21:26:11,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:26:11,524 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-02 21:26:11,524 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 [2023-04-02 21:26:11,530 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 [2023-04-02 21:26:11,536 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 [2023-04-02 21:26:11,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:26:11,631 INFO L321 Elim1Store]: treesize reduction 73, result has 33.0 percent of original size [2023-04-02 21:26:11,632 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 [2023-04-02 21:26:11,648 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 21:26:11,649 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 [2023-04-02 21:26:11,710 INFO L321 Elim1Store]: treesize reduction 73, result has 33.0 percent of original size [2023-04-02 21:26:11,710 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 [2023-04-02 21:26:11,746 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 [2023-04-02 21:26:11,774 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 [2023-04-02 21:26:11,797 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 [2023-04-02 21:26:11,849 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 [2023-04-02 21:26:11,935 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 [2023-04-02 21:26:12,005 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 [2023-04-02 21:26:12,037 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:26:12,038 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 [2023-04-02 21:26:12,055 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:26:12,057 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 [2023-04-02 21:26:12,061 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 [2023-04-02 21:26:15,922 INFO L321 Elim1Store]: treesize reduction 48, result has 90.8 percent of original size [2023-04-02 21:26:15,923 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 [2023-04-02 21:26:17,130 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 [2023-04-02 21:26:32,043 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 [2023-04-02 21:26:36,043 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 [2023-04-02 21:26:39,738 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 [2023-04-02 21:26:41,640 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 222 treesize of output 216 [2023-04-02 21:26:43,414 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 [2023-04-02 21:26:44,388 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 [2023-04-02 21:26:45,937 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