/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/list-properties/simple_built_from_end.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:29:35,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:29:35,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:29:35,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:29:35,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:29:35,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:29:35,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:29:35,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:29:35,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:29:35,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:29:35,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:29:35,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:29:35,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:29:35,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:29:35,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:29:35,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:29:35,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:29:35,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:29:35,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:29:35,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:29:35,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:29:35,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:29:35,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:29:35,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:29:35,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:29:35,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:29:35,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:29:35,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:29:35,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:29:35,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:29:35,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:29:35,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:29:35,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:29:35,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:29:35,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:29:35,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:29:35,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:29:35,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:29:35,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:29:35,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:29:35,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:29:35,921 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 21:29:35,943 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:29:35,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:29:35,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:29:35,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:29:35,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:29:35,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:29:35,944 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:29:35,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:29:35,944 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:29:35,945 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:29:35,945 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:29:35,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:29:35,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:29:35,945 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:29:35,945 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:29:35,945 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:29:35,946 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:29:35,946 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:29:35,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:29:35,946 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:29:35,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:29:35,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:29:35,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:29:35,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:29:35,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:29:35,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:29:35,947 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:29:35,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:29:35,947 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:29:35,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:29:35,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:29:35,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:29:35,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:29:35,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:29:35,948 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:29:35,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:29:35,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:29:35,948 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:29:35,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:29:35,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:29:35,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:29:35,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:29:36,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:29:36,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:29:36,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:29:36,161 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:29:36,161 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:29:36,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple_built_from_end.i [2023-04-02 21:29:37,151 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:29:37,461 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:29:37,462 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i [2023-04-02 21:29:37,470 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03b506d9/f7cfaa57913c47ab8de56ec51c6d7673/FLAG3856ef22a [2023-04-02 21:29:37,480 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03b506d9/f7cfaa57913c47ab8de56ec51c6d7673 [2023-04-02 21:29:37,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:29:37,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:29:37,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:29:37,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:29:37,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:29:37,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a6fb9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37, skipping insertion in model container [2023-04-02 21:29:37,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:29:37,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:29:37,766 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/list-properties/simple_built_from_end.i[23125,23138] [2023-04-02 21:29:37,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:29:37,777 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:29:37,807 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/list-properties/simple_built_from_end.i[23125,23138] [2023-04-02 21:29:37,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:29:37,834 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:29:37,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37 WrapperNode [2023-04-02 21:29:37,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:29:37,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:29:37,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:29:37,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:29:37,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,872 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:29:37,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:29:37,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:29:37,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:29:37,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37" (1/1) ... [2023-04-02 21:29:37,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:29:37,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:29:37,903 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 21:29:37,905 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 21:29:37,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:29:37,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:29:37,930 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:29:37,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-02 21:29:37,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-02 21:29:37,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2023-04-02 21:29:37,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2023-04-02 21:29:37,932 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2023-04-02 21:29:37,932 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-02 21:29:37,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:29:37,932 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:29:37,932 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:29:37,932 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 21:29:37,932 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 21:29:37,932 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 21:29:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 21:29:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 21:29:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 21:29:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 21:29:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 21:29:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 21:29:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 21:29:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 21:29:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-02 21:29:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-02 21:29:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2023-04-02 21:29:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2023-04-02 21:29:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2023-04-02 21:29:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 21:29:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 21:29:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 21:29:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 21:29:37,936 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 21:29:37,936 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 21:29:37,936 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 21:29:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 21:29:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 21:29:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 21:29:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 21:29:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 21:29:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 21:29:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 21:29:37,938 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 21:29:37,938 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 21:29:37,938 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 21:29:37,938 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 21:29:37,938 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 21:29:37,938 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 21:29:37,939 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 21:29:37,939 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 21:29:37,939 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 21:29:37,939 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 21:29:37,939 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 21:29:37,940 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 21:29:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 21:29:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 21:29:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-02 21:29:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 21:29:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-02 21:29:37,941 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 21:29:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 21:29:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 21:29:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 21:29:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 21:29:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 21:29:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 21:29:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 21:29:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 21:29:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 21:29:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 21:29:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 21:29:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 21:29:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 21:29:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 21:29:37,947 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 21:29:37,947 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-02 21:29:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:29:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 21:29:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:29:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 21:29:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:29:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 21:29:37,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:29:37,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:29:37,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:29:37,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:29:38,167 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:29:38,169 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:29:38,204 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-02 21:29:38,254 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:29:38,270 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:29:38,271 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 21:29:38,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:29:38 BoogieIcfgContainer [2023-04-02 21:29:38,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:29:38,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:29:38,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:29:38,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:29:38,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:29:37" (1/3) ... [2023-04-02 21:29:38,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c08a4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:29:38, skipping insertion in model container [2023-04-02 21:29:38,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:29:37" (2/3) ... [2023-04-02 21:29:38,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c08a4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:29:38, skipping insertion in model container [2023-04-02 21:29:38,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:29:38" (3/3) ... [2023-04-02 21:29:38,277 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2023-04-02 21:29:38,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:29:38,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:29:38,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:29:38,322 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;@695da0b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:29:38,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:29:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:29:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-04-02 21:29:38,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:29:38,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:29:38,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:29:38,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:29:38,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1302516372, now seen corresponding path program 1 times [2023-04-02 21:29:38,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:29:38,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291630934] [2023-04-02 21:29:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:29:38,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:29:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:38,423 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 21:29:38,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:29:38,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291630934] [2023-04-02 21:29:38,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291630934] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:29:38,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:29:38,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 21:29:38,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125176597] [2023-04-02 21:29:38,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:29:38,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 21:29:38,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:29:38,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 21:29:38,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 21:29:38,448 INFO L87 Difference]: Start difference. First operand has 20 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:29:38,461 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-04-02 21:29:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 21:29:38,463 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-04-02 21:29:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:29:38,467 INFO L225 Difference]: With dead ends: 28 [2023-04-02 21:29:38,467 INFO L226 Difference]: Without dead ends: 14 [2023-04-02 21:29:38,469 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 21:29:38,471 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:29:38,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:29:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-02 21:29:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-04-02 21:29:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-04-02 21:29:38,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-04-02 21:29:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:29:38,491 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-04-02 21:29:38,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-04-02 21:29:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 21:29:38,492 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:29:38,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:29:38,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:29:38,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:29:38,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:29:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1708820551, now seen corresponding path program 1 times [2023-04-02 21:29:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:29:38,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425104265] [2023-04-02 21:29:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:29:38,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:29:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:38,543 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 21:29:38,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:29:38,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425104265] [2023-04-02 21:29:38,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425104265] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:29:38,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:29:38,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:29:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229353076] [2023-04-02 21:29:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:29:38,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:29:38,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:29:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:29:38,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:29:38,545 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:29:38,555 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2023-04-02 21:29:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:29:38,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-02 21:29:38,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:29:38,556 INFO L225 Difference]: With dead ends: 24 [2023-04-02 21:29:38,556 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 21:29:38,557 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 21:29:38,558 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:29:38,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:29:38,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 21:29:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2023-04-02 21:29:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-02 21:29:38,563 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2023-04-02 21:29:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:29:38,564 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-02 21:29:38,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-02 21:29:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 21:29:38,564 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:29:38,564 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:29:38,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 21:29:38,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:29:38,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:29:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1877039808, now seen corresponding path program 1 times [2023-04-02 21:29:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:29:38,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809036248] [2023-04-02 21:29:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:29:38,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:29:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:38,752 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 21:29:38,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:29:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809036248] [2023-04-02 21:29:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809036248] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:29:38,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:29:38,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 21:29:38,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872217902] [2023-04-02 21:29:38,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:29:38,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 21:29:38,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:29:38,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 21:29:38,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 21:29:38,754 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:29:38,791 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-04-02 21:29:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 21:29:38,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 21:29:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:29:38,792 INFO L225 Difference]: With dead ends: 23 [2023-04-02 21:29:38,792 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 21:29:38,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:29:38,794 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:29:38,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:29:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 21:29:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-04-02 21:29:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-04-02 21:29:38,800 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2023-04-02 21:29:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:29:38,801 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-04-02 21:29:38,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-04-02 21:29:38,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 21:29:38,802 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:29:38,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:29:38,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 21:29:38,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:29:38,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:29:38,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1576458477, now seen corresponding path program 1 times [2023-04-02 21:29:38,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:29:38,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756823759] [2023-04-02 21:29:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:29:38,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:29:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:39,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:29:39,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756823759] [2023-04-02 21:29:39,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756823759] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:29:39,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359089786] [2023-04-02 21:29:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:29:39,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:39,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:29:39,127 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 21:29:39,155 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 21:29:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:39,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 21:29:39,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:29:39,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:29:39,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:29:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:39,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:29:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:39,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359089786] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:29:39,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734719166] [2023-04-02 21:29:39,459 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 21:29:39,459 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:29:39,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:29:39,465 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:29:39,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:29:39,546 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:29:39,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:29:39,850 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:29:39,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '205#true' at error location [2023-04-02 21:29:39,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:29:39,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:29:39,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 6 [2023-04-02 21:29:39,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098774510] [2023-04-02 21:29:39,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:29:39,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 21:29:39,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:29:39,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 21:29:40,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 21:29:40,000 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:29:40,027 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-04-02 21:29:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:29:40,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-02 21:29:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:29:40,028 INFO L225 Difference]: With dead ends: 33 [2023-04-02 21:29:40,028 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 21:29:40,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 21:29:40,030 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:29:40,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:29:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 21:29:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-04-02 21:29:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-02 21:29:40,033 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2023-04-02 21:29:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:29:40,033 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-02 21:29:40,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-02 21:29:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 21:29:40,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:29:40,033 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:29:40,039 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 21:29:40,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:40,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:29:40,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:29:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash 897600122, now seen corresponding path program 2 times [2023-04-02 21:29:40,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:29:40,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556205409] [2023-04-02 21:29:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:29:40,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:29:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:40,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:29:40,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556205409] [2023-04-02 21:29:40,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556205409] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:29:40,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026680966] [2023-04-02 21:29:40,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:29:40,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:40,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:29:40,519 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 21:29:40,570 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 21:29:40,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 21:29:40,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:29:40,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-02 21:29:40,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:29:40,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:29:40,660 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 21:29:40,673 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 21:29:40,674 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 21:29:40,692 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 11 treesize of output 7 [2023-04-02 21:29:40,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 20 [2023-04-02 21:29:40,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:29:40,739 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 27 treesize of output 15 [2023-04-02 21:29:40,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-02 21:29:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:40,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:29:40,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:40,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2023-04-02 21:29:40,820 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 30 treesize of output 22 [2023-04-02 21:29:40,823 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 21:29:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:40,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026680966] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:29:40,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1257009590] [2023-04-02 21:29:40,837 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 21:29:40,837 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:29:40,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:29:40,837 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:29:40,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:29:40,849 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:29:40,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:29:40,978 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:29:41,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#true' at error location [2023-04-02 21:29:41,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:29:41,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:29:41,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-04-02 21:29:41,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266631649] [2023-04-02 21:29:41,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:29:41,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 21:29:41,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:29:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 21:29:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=402, Unknown=2, NotChecked=0, Total=462 [2023-04-02 21:29:41,158 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:29:41,296 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-04-02 21:29:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 21:29:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 21:29:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:29:41,297 INFO L225 Difference]: With dead ends: 30 [2023-04-02 21:29:41,297 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 21:29:41,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=671, Unknown=2, NotChecked=0, Total=812 [2023-04-02 21:29:41,298 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:29:41,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 85 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:29:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 21:29:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-04-02 21:29:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-02 21:29:41,301 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2023-04-02 21:29:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:29:41,302 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-02 21:29:41,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-02 21:29:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 21:29:41,302 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:29:41,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:29:41,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 21:29:41,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:41,507 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:29:41,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:29:41,508 INFO L85 PathProgramCache]: Analyzing trace with hash -56335079, now seen corresponding path program 3 times [2023-04-02 21:29:41,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:29:41,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012593234] [2023-04-02 21:29:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:29:41,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:29:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:41,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:29:41,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012593234] [2023-04-02 21:29:41,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012593234] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:29:41,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790306855] [2023-04-02 21:29:41,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 21:29:41,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:41,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:29:41,850 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 21:29:41,852 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 21:29:41,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 21:29:41,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:29:41,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 21:29:41,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:29:41,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:29:41,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:29:41,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:29:42,002 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 21:29:42,002 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 21:29:42,020 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:29:42,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-04-02 21:29:42,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 18 [2023-04-02 21:29:42,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:29:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:42,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:29:42,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:42,162 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 21:29:42,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:42,167 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 21:29:42,172 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_main_~p~0.offset 4)) (.cse0 (+ c_main_~t~0.offset 4))) (and (forall ((v_arrayElimArr_4 (Array Int Int))) (or (not (= c_main_~p~0.base (select v_arrayElimArr_4 .cse0))) (= (select (select (store |c_#memory_$Pointer$.base| c_main_~t~0.base v_arrayElimArr_4) c_main_~p~0.base) .cse1) 0))) (forall ((v_arrayElimArr_3 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.offset| c_main_~t~0.base v_arrayElimArr_3) c_main_~p~0.base) .cse1) 0) (not (= (select v_arrayElimArr_3 .cse0) c_main_~p~0.offset)))))) is different from false [2023-04-02 21:29:42,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:42,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-04-02 21:29:42,241 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 36 treesize of output 24 [2023-04-02 21:29:42,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:42,246 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 18 treesize of output 20 [2023-04-02 21:29:42,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:42,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-04-02 21:29:42,271 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 36 treesize of output 24 [2023-04-02 21:29:42,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:42,276 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 18 treesize of output 20 [2023-04-02 21:29:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-02 21:29:42,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790306855] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:29:42,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715938318] [2023-04-02 21:29:42,383 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 21:29:42,383 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:29:42,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:29:42,384 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:29:42,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:29:42,394 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:29:42,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:29:42,490 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:29:42,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '630#true' at error location [2023-04-02 21:29:42,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:29:42,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:29:42,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-04-02 21:29:42,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004162321] [2023-04-02 21:29:42,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:29:42,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 21:29:42,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:29:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 21:29:42,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=403, Unknown=1, NotChecked=40, Total=506 [2023-04-02 21:29:42,682 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:29:46,856 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2023-04-02 21:29:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 21:29:46,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-02 21:29:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:29:46,857 INFO L225 Difference]: With dead ends: 43 [2023-04-02 21:29:46,857 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 21:29:46,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=69, Invalid=440, Unknown=1, NotChecked=42, Total=552 [2023-04-02 21:29:46,858 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:29:46,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 82 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2023-04-02 21:29:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 21:29:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-02 21:29:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-04-02 21:29:46,861 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2023-04-02 21:29:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:29:46,862 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-04-02 21:29:46,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-04-02 21:29:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 21:29:46,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:29:46,862 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:29:46,873 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 21:29:47,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:47,074 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:29:47,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:29:47,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2047406034, now seen corresponding path program 4 times [2023-04-02 21:29:47,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:29:47,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112340970] [2023-04-02 21:29:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:29:47,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:29:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:47,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:29:47,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112340970] [2023-04-02 21:29:47,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112340970] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:29:47,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420270339] [2023-04-02 21:29:47,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 21:29:47,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:47,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:29:47,673 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 21:29:47,698 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 21:29:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:47,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 63 conjunts are in the unsatisfiable core [2023-04-02 21:29:47,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:29:47,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:29:47,825 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 21:29:47,861 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 21:29:47,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 21:29:47,933 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 11 treesize of output 7 [2023-04-02 21:29:47,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 20 [2023-04-02 21:29:47,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:29:47,995 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-04-02 21:29:47,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-04-02 21:29:48,055 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:29:48,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-04-02 21:29:48,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 36 [2023-04-02 21:29:48,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:48,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 23 [2023-04-02 21:29:48,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:29:48,219 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 21:29:48,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2023-04-02 21:29:48,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-02 21:29:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:48,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:29:48,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:48,288 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2023-04-02 21:29:48,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:48,292 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2023-04-02 21:29:48,302 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_8 (Array Int Int)) (v_arrayElimArr_9 (Array Int Int)) (v_ArrVal_258 (Array Int Int))) (let ((.cse0 (+ c_main_~t~0.offset 4))) (or (not (= c_main_~p~0.base (select v_arrayElimArr_8 .cse0))) (not (= c_main_~p~0.offset (select v_arrayElimArr_9 .cse0))) (= (let ((.cse1 (+ c_main_~p~0.offset 4))) (select (select (store |c_#memory_int| c_main_~t~0.base v_ArrVal_258) (select (select (store |c_#memory_$Pointer$.base| c_main_~t~0.base v_arrayElimArr_8) c_main_~p~0.base) .cse1)) (select (select (store |c_#memory_$Pointer$.offset| c_main_~t~0.base v_arrayElimArr_9) c_main_~p~0.base) .cse1))) 1)))) is different from false [2023-04-02 21:29:48,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:48,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 52 [2023-04-02 21:29:48,382 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 94 treesize of output 82 [2023-04-02 21:29:48,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:48,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2023-04-02 21:29:48,394 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 120 treesize of output 102 [2023-04-02 21:29:48,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:48,403 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 32 treesize of output 34 [2023-04-02 21:29:48,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:48,412 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 28 treesize of output 30 [2023-04-02 21:29:48,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:48,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2023-04-02 21:29:48,720 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 60 treesize of output 52 [2023-04-02 21:29:48,725 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 40 treesize of output 36 [2023-04-02 21:29:48,727 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 22 treesize of output 20 [2023-04-02 21:29:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-04-02 21:29:48,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420270339] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:29:48,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1133632140] [2023-04-02 21:29:48,772 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 21:29:48,772 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:29:48,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:29:48,773 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:29:48,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:29:48,796 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:29:48,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:29:48,939 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:29:49,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '894#true' at error location [2023-04-02 21:29:49,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:29:49,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:29:49,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 27 [2023-04-02 21:29:49,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665402362] [2023-04-02 21:29:49,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:29:49,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 21:29:49,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:29:49,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 21:29:49,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=4, NotChecked=64, Total=1190 [2023-04-02 21:29:49,178 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:29:49,632 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2023-04-02 21:29:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 21:29:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-02 21:29:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:29:49,633 INFO L225 Difference]: With dead ends: 37 [2023-04-02 21:29:49,633 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 21:29:49,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=4, NotChecked=84, Total=1980 [2023-04-02 21:29:49,635 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:29:49,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 157 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2023-04-02 21:29:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 21:29:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2023-04-02 21:29:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-04-02 21:29:49,638 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2023-04-02 21:29:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:29:49,638 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-04-02 21:29:49,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-04-02 21:29:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 21:29:49,639 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:29:49,639 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:29:49,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 21:29:49,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:49,843 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:29:49,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:29:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1447403713, now seen corresponding path program 5 times [2023-04-02 21:29:49,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:29:49,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990081080] [2023-04-02 21:29:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:29:49,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:29:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:50,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:29:50,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990081080] [2023-04-02 21:29:50,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990081080] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:29:50,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629382737] [2023-04-02 21:29:50,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:29:50,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:29:50,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:29:50,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 21:29:50,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 21:29:50,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:29:50,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 73 conjunts are in the unsatisfiable core [2023-04-02 21:29:50,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:29:50,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:29:50,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:29:50,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:29:50,631 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 21:29:50,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 21:29:50,662 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:29:50,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 21 [2023-04-02 21:29:50,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 18 [2023-04-02 21:29:50,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:29:50,723 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-04-02 21:29:50,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-04-02 21:29:50,771 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:29:50,780 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-02 21:29:50,780 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 51 [2023-04-02 21:29:50,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:50,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 41 [2023-04-02 21:29:50,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:29:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:51,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:29:51,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,087 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 49 [2023-04-02 21:29:51,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,091 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2023-04-02 21:29:51,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,098 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2023-04-02 21:29:51,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,101 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-04-02 21:29:51,111 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_main_~p~0.offset 4)) (.cse0 (+ c_main_~t~0.offset 4))) (and (forall ((v_arrayElimArr_15 (Array Int Int)) (v_arrayElimArr_16 (Array Int Int))) (or (not (= c_main_~p~0.base (select v_arrayElimArr_15 .cse0))) (not (= (select v_arrayElimArr_16 .cse0) c_main_~p~0.offset)) (= (let ((.cse1 (store |c_#memory_$Pointer$.offset| c_main_~t~0.base v_arrayElimArr_16))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$.base| c_main_~t~0.base v_arrayElimArr_15) c_main_~p~0.base) .cse2)) (+ (select (select .cse1 c_main_~p~0.base) .cse2) 4))) 0))) (forall ((v_arrayElimArr_17 (Array Int Int)) (v_arrayElimArr_18 (Array Int Int))) (or (= (select (let ((.cse3 (store |c_#memory_$Pointer$.base| c_main_~t~0.base v_arrayElimArr_17))) (select .cse3 (select (select .cse3 c_main_~p~0.base) .cse2))) (+ (select (select (store |c_#memory_$Pointer$.offset| c_main_~t~0.base v_arrayElimArr_18) c_main_~p~0.base) .cse2) 4)) 0) (not (= (select v_arrayElimArr_17 .cse0) c_main_~p~0.base)) (not (= (select v_arrayElimArr_18 .cse0) c_main_~p~0.offset)))))) is different from false [2023-04-02 21:29:51,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,232 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2023-04-02 21:29:51,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,236 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2023-04-02 21:29:51,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,250 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2023-04-02 21:29:51,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,254 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2023-04-02 21:29:51,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 76 [2023-04-02 21:29:51,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2023-04-02 21:29:51,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:29:51,595 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 44 treesize of output 38 [2023-04-02 21:29:51,598 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:29:51,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:51,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 178 [2023-04-02 21:29:51,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,623 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 86 treesize of output 76 [2023-04-02 21:29:51,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 67 [2023-04-02 21:29:51,633 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 27 treesize of output 21 [2023-04-02 21:29:51,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 66 [2023-04-02 21:29:51,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 56 [2023-04-02 21:29:51,757 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:29:51,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:51,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:51,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 346 [2023-04-02 21:29:51,768 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:29:51,769 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 90 treesize of output 84 [2023-04-02 21:29:51,776 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 99 treesize of output 87 [2023-04-02 21:29:51,797 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 78 treesize of output 64 [2023-04-02 21:29:51,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,804 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 68 [2023-04-02 21:29:51,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:51,812 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 35 treesize of output 33 [2023-04-02 21:29:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-04-02 21:29:52,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629382737] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:29:52,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [379654493] [2023-04-02 21:29:52,049 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 21:29:52,049 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:29:52,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:29:52,050 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:29:52,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:29:52,060 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:29:52,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:29:52,174 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:29:52,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1210#true' at error location [2023-04-02 21:29:52,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:29:52,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:29:52,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2023-04-02 21:29:52,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76608934] [2023-04-02 21:29:52,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:29:52,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 21:29:52,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:29:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 21:29:52,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=833, Unknown=3, NotChecked=58, Total=992 [2023-04-02 21:29:52,477 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:52,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:29:52,735 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2023-04-02 21:29:52,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 21:29:52,737 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2023-04-02 21:29:52,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:29:52,738 INFO L225 Difference]: With dead ends: 53 [2023-04-02 21:29:52,738 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 21:29:52,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=107, Invalid=886, Unknown=3, NotChecked=60, Total=1056 [2023-04-02 21:29:52,739 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 21:29:52,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 211 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2023-04-02 21:29:52,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 21:29:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-04-02 21:29:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-04-02 21:29:52,742 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2023-04-02 21:29:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:29:52,742 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-04-02 21:29:52,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:29:52,743 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-04-02 21:29:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 21:29:52,743 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:29:52,743 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:29:52,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 21:29:52,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:52,944 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:29:52,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:29:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash 877347816, now seen corresponding path program 6 times [2023-04-02 21:29:52,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:29:52,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113463735] [2023-04-02 21:29:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:29:52,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:29:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:29:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:53,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:29:53,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113463735] [2023-04-02 21:29:53,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113463735] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:29:53,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683487733] [2023-04-02 21:29:53,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 21:29:53,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:29:53,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:29:53,861 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:29:53,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 21:29:53,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 21:29:53,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:29:53,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 97 conjunts are in the unsatisfiable core [2023-04-02 21:29:53,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:29:53,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:29:53,987 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 21:29:54,005 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 21:29:54,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 21:29:54,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:29:54,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-02 21:29:54,059 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 11 treesize of output 7 [2023-04-02 21:29:54,115 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-04-02 21:29:54,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-04-02 21:29:54,185 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:29:54,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-02 21:29:54,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-04-02 21:29:54,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 53 treesize of output 43 [2023-04-02 21:29:54,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:29:54,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:54,276 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2023-04-02 21:29:54,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2023-04-02 21:29:54,375 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:29:54,386 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-02 21:29:54,386 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 69 [2023-04-02 21:29:54,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-02 21:29:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:54,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 41 [2023-04-02 21:29:54,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:29:54,859 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-04-02 21:29:54,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 62 [2023-04-02 21:29:54,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-04-02 21:29:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:29:54,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:29:55,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:55,204 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 88 [2023-04-02 21:29:55,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:55,207 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 73 [2023-04-02 21:29:55,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:55,395 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 117 [2023-04-02 21:29:55,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:55,400 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2023-04-02 21:29:55,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:55,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 143 [2023-04-02 21:29:55,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:55,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 113 [2023-04-02 21:29:55,725 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:29:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:55,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 756 treesize of output 706 [2023-04-02 21:29:55,738 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:29:55,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:29:55,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1460 treesize of output 1374 [2023-04-02 21:29:55,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:55,783 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 198 treesize of output 172 [2023-04-02 21:29:55,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:55,792 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 136 treesize of output 126 [2023-04-02 21:29:55,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:55,802 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 136 [2023-04-02 21:29:55,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:29:55,815 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 61 treesize of output 59 [2023-04-02 21:31:02,018 WARN L223 SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 373 DAG size of output: 184 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 21:31:02,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:02,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 52 [2023-04-02 21:31:02,624 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:02,624 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:02,626 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 248 treesize of output 236 [2023-04-02 21:31:02,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:02,643 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 61 treesize of output 63 [2023-04-02 21:31:02,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:02,656 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 102 treesize of output 100 [2023-04-02 21:31:02,664 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 41 treesize of output 39 [2023-04-02 21:31:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 35 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:31:02,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683487733] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:31:02,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1064694934] [2023-04-02 21:31:02,977 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 21:31:02,977 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:31:02,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:31:02,978 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:31:02,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:31:02,990 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:31:03,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:31:03,088 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:31:03,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1547#true' at error location [2023-04-02 21:31:03,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:31:03,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:31:03,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2023-04-02 21:31:03,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860810704] [2023-04-02 21:31:03,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:31:03,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-02 21:31:03,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:31:03,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-02 21:31:03,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2608, Unknown=5, NotChecked=0, Total=2862 [2023-04-02 21:31:03,519 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 46 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:31:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:31:12,075 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-04-02 21:31:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 21:31:12,076 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 46 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-04-02 21:31:12,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:31:12,076 INFO L225 Difference]: With dead ends: 44 [2023-04-02 21:31:12,076 INFO L226 Difference]: Without dead ends: 42 [2023-04-02 21:31:12,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 72.7s TimeCoverageRelationStatistics Valid=597, Invalid=3919, Unknown=40, NotChecked=0, Total=4556 [2023-04-02 21:31:12,078 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 92 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 18 mSolverCounterUnsat, 83 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 83 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 21:31:12,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 248 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 420 Invalid, 83 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 21:31:12,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-02 21:31:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-04-02 21:31:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:31:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2023-04-02 21:31:12,082 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2023-04-02 21:31:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:31:12,083 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2023-04-02 21:31:12,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 46 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:31:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2023-04-02 21:31:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 21:31:12,083 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:31:12,083 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:31:12,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 21:31:12,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:31:12,284 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:31:12,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:31:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2097361685, now seen corresponding path program 7 times [2023-04-02 21:31:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:31:12,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454119360] [2023-04-02 21:31:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:31:12,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:31:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:31:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:31:14,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:31:14,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454119360] [2023-04-02 21:31:14,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454119360] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:31:14,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744399475] [2023-04-02 21:31:14,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 21:31:14,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:31:14,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:31:14,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:31:14,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 21:31:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:31:14,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-02 21:31:14,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:31:14,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:31:14,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:31:14,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:31:14,458 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 21:31:14,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 21:31:14,510 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:31:14,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 18 [2023-04-02 21:31:14,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 23 [2023-04-02 21:31:14,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:31:14,662 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-04-02 21:31:14,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-04-02 21:31:14,839 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:31:14,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-04-02 21:31:14,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:31:14,868 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-02 21:31:14,869 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 58 [2023-04-02 21:31:14,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:15,031 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2023-04-02 21:31:15,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2023-04-02 21:31:15,168 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:31:15,233 INFO L321 Elim1Store]: treesize reduction 56, result has 16.4 percent of original size [2023-04-02 21:31:15,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 84 [2023-04-02 21:31:15,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:15,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:15,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:15,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 63 [2023-04-02 21:31:15,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:31:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:31:16,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:31:17,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:17,078 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 95 [2023-04-02 21:31:17,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:17,085 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 75 [2023-04-02 21:31:17,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:17,115 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 90 [2023-04-02 21:31:17,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:17,122 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2023-04-02 21:31:17,148 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_main_~p~0.offset 4)) (.cse0 (+ c_main_~t~0.offset 4))) (and (forall ((v_arrayElimArr_42 (Array Int Int)) (v_arrayElimArr_41 (Array Int Int))) (or (not (= (select v_arrayElimArr_41 .cse0) c_main_~p~0.base)) (not (= (select v_arrayElimArr_42 .cse0) c_main_~p~0.offset)) (= (let ((.cse4 (store |c_#memory_$Pointer$.offset| c_main_~t~0.base v_arrayElimArr_42)) (.cse1 (store |c_#memory_$Pointer$.base| c_main_~t~0.base v_arrayElimArr_41))) (let ((.cse2 (select (select .cse1 c_main_~p~0.base) .cse5)) (.cse3 (+ 4 (select (select .cse4 c_main_~p~0.base) .cse5)))) (select (select .cse1 (select (select .cse1 .cse2) .cse3)) (+ (select (select .cse4 .cse2) .cse3) 4)))) 0))) (forall ((v_arrayElimArr_39 (Array Int Int)) (v_arrayElimArr_40 (Array Int Int))) (or (not (= (select v_arrayElimArr_40 .cse0) c_main_~p~0.offset)) (= (let ((.cse6 (store |c_#memory_$Pointer$.offset| c_main_~t~0.base v_arrayElimArr_40)) (.cse7 (store |c_#memory_$Pointer$.base| c_main_~t~0.base v_arrayElimArr_39))) (let ((.cse8 (select (select .cse7 c_main_~p~0.base) .cse5)) (.cse9 (+ (select (select .cse6 c_main_~p~0.base) .cse5) 4))) (select (select .cse6 (select (select .cse7 .cse8) .cse9)) (+ 4 (select (select .cse6 .cse8) .cse9))))) 0) (not (= (select v_arrayElimArr_39 .cse0) c_main_~p~0.base)))))) is different from false [2023-04-02 21:31:17,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:17,388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 116 [2023-04-02 21:31:17,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:17,398 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 96 [2023-04-02 21:31:17,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:17,432 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 111 [2023-04-02 21:31:17,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:17,442 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2023-04-02 21:31:18,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:18,036 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 146 [2023-04-02 21:31:18,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:18,051 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 131 [2023-04-02 21:31:18,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:18,122 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 151 [2023-04-02 21:31:18,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:18,136 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 131 [2023-04-02 21:31:19,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:19,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 177 [2023-04-02 21:31:19,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:19,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 147 [2023-04-02 21:31:19,393 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:19,394 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:19,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:19,397 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:19,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14192 treesize of output 13354 [2023-04-02 21:31:19,463 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:19,464 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:19,468 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 1558 treesize of output 1552 [2023-04-02 21:31:19,525 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 466 treesize of output 436 [2023-04-02 21:31:19,540 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 469 treesize of output 379 [2023-04-02 21:31:19,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:19,565 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 354 treesize of output 348 [2023-04-02 21:31:19,583 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 355 treesize of output 299 [2023-04-02 21:31:19,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:19,615 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 142 treesize of output 140 [2023-04-02 21:31:19,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:19,658 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 149 treesize of output 139 [2023-04-02 21:31:20,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:20,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 187 [2023-04-02 21:31:20,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:20,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 147 [2023-04-02 21:31:20,281 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:20,282 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:20,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:20,284 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:20,288 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 79 treesize of output 73 [2023-04-02 21:31:20,321 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:20,321 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:20,329 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:20,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:20,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:20,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 16262 treesize of output 15640 [2023-04-02 21:31:20,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:20,567 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 890 treesize of output 750 [2023-04-02 21:31:20,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:20,598 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 750 treesize of output 600 [2023-04-02 21:31:20,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:20,632 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 579 treesize of output 515 [2023-04-02 21:31:20,656 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 37 treesize of output 29 [2023-04-02 21:31:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-04-02 21:31:23,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744399475] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:31:23,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2057997723] [2023-04-02 21:31:23,292 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 21:31:23,292 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:31:23,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:31:23,292 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:31:23,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:31:23,309 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:31:23,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:31:23,451 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:31:24,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1951#true' at error location [2023-04-02 21:31:24,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:31:24,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:31:24,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 37 [2023-04-02 21:31:24,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432399091] [2023-04-02 21:31:24,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:31:24,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-02 21:31:24,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:31:24,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-02 21:31:24,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1743, Unknown=5, NotChecked=84, Total=1980 [2023-04-02 21:31:24,862 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 37 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:31:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:31:32,877 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2023-04-02 21:31:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 21:31:32,878 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 37 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-04-02 21:31:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:31:32,878 INFO L225 Difference]: With dead ends: 63 [2023-04-02 21:31:32,879 INFO L226 Difference]: Without dead ends: 45 [2023-04-02 21:31:32,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=262, Invalid=2817, Unknown=5, NotChecked=108, Total=3192 [2023-04-02 21:31:32,880 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 11 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 21:31:32,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 276 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 459 Invalid, 23 Unknown, 38 Unchecked, 1.8s Time] [2023-04-02 21:31:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-02 21:31:32,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2023-04-02 21:31:32,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:31:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2023-04-02 21:31:32,885 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2023-04-02 21:31:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:31:32,885 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2023-04-02 21:31:32,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 37 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:31:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2023-04-02 21:31:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 21:31:32,886 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:31:32,886 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:31:32,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 21:31:33,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:31:33,094 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:31:33,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:31:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash -130572316, now seen corresponding path program 8 times [2023-04-02 21:31:33,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:31:33,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577703369] [2023-04-02 21:31:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:31:33,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:31:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:31:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:31:35,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:31:35,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577703369] [2023-04-02 21:31:35,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577703369] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:31:35,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985088736] [2023-04-02 21:31:35,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:31:35,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:31:35,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:31:35,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:31:35,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 21:31:35,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 21:31:35,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:31:35,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 123 conjunts are in the unsatisfiable core [2023-04-02 21:31:35,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:31:35,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:31:35,467 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 21:31:35,511 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 21:31:35,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 21:31:35,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:31:35,560 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 11 treesize of output 7 [2023-04-02 21:31:35,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 20 [2023-04-02 21:31:35,703 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-04-02 21:31:35,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-04-02 21:31:35,842 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:31:35,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 53 treesize of output 43 [2023-04-02 21:31:35,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-04-02 21:31:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:35,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 23 [2023-04-02 21:31:35,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:31:36,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:36,099 INFO L321 Elim1Store]: treesize reduction 90, result has 36.6 percent of original size [2023-04-02 21:31:36,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 69 [2023-04-02 21:31:36,290 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:31:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:36,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-04-02 21:31:36,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:31:36,329 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-02 21:31:36,330 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 83 [2023-04-02 21:31:36,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-02 21:31:36,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:36,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:36,585 INFO L321 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2023-04-02 21:31:36,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 56 [2023-04-02 21:31:36,770 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-02 21:31:36,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2023-04-02 21:31:36,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:36,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:36,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:36,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2023-04-02 21:31:36,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 21:31:36,829 INFO L321 Elim1Store]: treesize reduction 56, result has 16.4 percent of original size [2023-04-02 21:31:36,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 172 treesize of output 102 [2023-04-02 21:31:38,844 INFO L321 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2023-04-02 21:31:38,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 88 [2023-04-02 21:31:38,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-04-02 21:31:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:31:39,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:31:40,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:40,178 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 180 [2023-04-02 21:31:40,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:40,191 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 145 [2023-04-02 21:31:40,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:40,680 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 241 [2023-04-02 21:31:40,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:40,694 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 206 [2023-04-02 21:31:41,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:41,455 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 300 [2023-04-02 21:31:41,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:41,467 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 265 [2023-04-02 21:31:41,801 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_766 (Array Int Int)) (v_main_~t~0.base_50 Int) (v_arrayElimArr_59 (Array Int Int)) (v_arrayElimArr_58 (Array Int Int)) (v_arrayElimArr_60 (Array Int Int)) (v_arrayElimArr_62 (Array Int Int)) (v_arrayElimArr_61 (Array Int Int)) (v_ArrVal_775 (Array Int Int)) (v_arrayElimArr_63 (Array Int Int)) (v_ArrVal_763 (Array Int Int))) (let ((.cse1 (select v_arrayElimArr_58 4)) (.cse2 (select v_arrayElimArr_61 4))) (let ((.cse0 (store |c_#valid| .cse2 1)) (.cse3 (store (store (store |c_#memory_int| .cse2 v_ArrVal_763) .cse1 v_ArrVal_766) v_main_~t~0.base_50 v_ArrVal_775))) (or (not (= (select (store .cse0 .cse1 1) v_main_~t~0.base_50) 0)) (not (= (select .cse0 .cse1) 0)) (not (= (select v_arrayElimArr_60 4) 0)) (not (= (select |c_#valid| .cse2) 0)) (not (= (select v_arrayElimArr_63 4) c_main_~p~0.base)) (not (= (select v_arrayElimArr_62 4) c_main_~p~0.offset)) (not (= (select v_arrayElimArr_59 4) 0)) (= (let ((.cse7 (store (store (store |c_#memory_$Pointer$.offset| .cse2 v_arrayElimArr_62) .cse1 v_arrayElimArr_60) v_main_~t~0.base_50 v_arrayElimArr_59)) (.cse4 (store (store (store |c_#memory_$Pointer$.base| .cse2 v_arrayElimArr_63) .cse1 v_arrayElimArr_61) v_main_~t~0.base_50 v_arrayElimArr_58))) (let ((.cse8 (select (select .cse4 .cse1) 4)) (.cse9 (+ 4 (select (select .cse7 .cse1) 4)))) (let ((.cse5 (select (select .cse4 .cse8) .cse9)) (.cse6 (+ 4 (select (select .cse7 .cse8) .cse9)))) (select (select .cse3 (select (select .cse4 .cse5) .cse6)) (select (select .cse7 .cse5) .cse6))))) 1) (not (= (select v_ArrVal_775 0) 1)) (not (= (select (select .cse3 .cse1) 0) 1)))))) is different from false [2023-04-02 21:31:41,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:41,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 429 treesize of output 370 [2023-04-02 21:31:41,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:41,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 359 treesize of output 300 [2023-04-02 21:31:41,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:41,900 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:41,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:41,902 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:41,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3040 treesize of output 2930 [2023-04-02 21:31:41,945 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:41,945 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:41,946 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:31:41,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:31:41,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17150 treesize of output 16824 [2023-04-02 21:31:42,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:42,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2743 treesize of output 2401 [2023-04-02 21:31:42,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:42,436 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 2385 treesize of output 2079 [2023-04-02 21:31:42,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:42,483 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 2034 treesize of output 1898 [2023-04-02 21:31:42,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:42,554 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 1745 treesize of output 1621 [2023-04-02 21:31:42,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:42,620 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 1758 treesize of output 1572 [2023-04-02 21:31:42,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:31:42,695 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 178