/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 00:59:20,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 00:59:20,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 00:59:20,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 00:59:20,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 00:59:20,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 00:59:20,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 00:59:20,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 00:59:20,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 00:59:20,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 00:59:20,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 00:59:20,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 00:59:20,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 00:59:20,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 00:59:20,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 00:59:20,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 00:59:20,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 00:59:20,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 00:59:20,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 00:59:20,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 00:59:20,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 00:59:20,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 00:59:20,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 00:59:20,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 00:59:20,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 00:59:20,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 00:59:20,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 00:59:20,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 00:59:20,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 00:59:20,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 00:59:20,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 00:59:20,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 00:59:20,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 00:59:20,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 00:59:20,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 00:59:20,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 00:59:20,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 00:59:20,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 00:59:20,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 00:59:20,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 00:59:20,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 00:59:20,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 00:59:20,760 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 00:59:20,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 00:59:20,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 00:59:20,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 00:59:20,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 00:59:20,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 00:59:20,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 00:59:20,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 00:59:20,763 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 00:59:20,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 00:59:20,764 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 00:59:20,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 00:59:20,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 00:59:20,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 00:59:20,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 00:59:20,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 00:59:20,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 00:59:20,765 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 00:59:20,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 00:59:20,765 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 00:59:20,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 00:59:20,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 00:59:20,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 00:59:20,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 00:59:20,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:59:20,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 00:59:20,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 00:59:20,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 00:59:20,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 00:59:20,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 00:59:20,766 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 00:59:20,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 00:59:20,766 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 00:59:20,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 00:59:20,767 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 00:59:20,767 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 00:59:20,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 00:59:21,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 00:59:21,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 00:59:21,015 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 00:59:21,016 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 00:59:21,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2023-04-02 00:59:22,184 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 00:59:22,388 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 00:59:22,389 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2023-04-02 00:59:22,404 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1df88550/7b6d7204b91e42b3b16847e3dbcf7454/FLAGbbe56b962 [2023-04-02 00:59:22,421 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1df88550/7b6d7204b91e42b3b16847e3dbcf7454 [2023-04-02 00:59:22,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 00:59:22,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 00:59:22,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 00:59:22,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 00:59:22,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 00:59:22,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54dcbccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22, skipping insertion in model container [2023-04-02 00:59:22,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 00:59:22,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 00:59:22,761 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-ext2-properties/simple_and_skiplist_2lvl-2.i[24020,24033] [2023-04-02 00:59:22,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:59:22,777 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 00:59:22,820 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-ext2-properties/simple_and_skiplist_2lvl-2.i[24020,24033] [2023-04-02 00:59:22,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:59:22,846 INFO L208 MainTranslator]: Completed translation [2023-04-02 00:59:22,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22 WrapperNode [2023-04-02 00:59:22,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 00:59:22,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 00:59:22,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 00:59:22,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 00:59:22,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,912 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 00:59:22,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 00:59:22,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 00:59:22,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 00:59:22,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22" (1/1) ... [2023-04-02 00:59:22,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:59:22,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:59:22,956 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 00:59:22,981 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 00:59:22,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 00:59:23,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 00:59:23,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 00:59:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-02 00:59:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-02 00:59:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-02 00:59:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2023-04-02 00:59:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2023-04-02 00:59:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2023-04-02 00:59:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2023-04-02 00:59:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 00:59:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 00:59:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 00:59:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 00:59:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 00:59:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 00:59:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 00:59:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 00:59:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 00:59:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 00:59:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 00:59:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 00:59:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 00:59:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 00:59:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 00:59:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 00:59:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 00:59:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 00:59:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 00:59:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 00:59:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 00:59:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 00:59:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 00:59:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 00:59:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-02 00:59:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-02 00:59:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 00:59:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 00:59:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 00:59:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 00:59:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 00:59:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 00:59:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 00:59:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 00:59:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 00:59:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 00:59:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 00:59:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 00:59:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 00:59:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 00:59:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 00:59:23,009 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 00:59:23,009 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 00:59:23,009 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 00:59:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 00:59:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 00:59:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 00:59:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 00:59:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 00:59:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 00:59:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 00:59:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 00:59:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 00:59:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 00:59:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 00:59:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 00:59:23,013 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 00:59:23,013 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 00:59:23,013 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-02 00:59:23,013 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 00:59:23,013 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-02 00:59:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 00:59:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 00:59:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-02 00:59:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 00:59:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 00:59:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 00:59:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 00:59:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 00:59:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 00:59:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 00:59:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 00:59:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 00:59:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 00:59:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 00:59:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 00:59:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 00:59:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 00:59:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 00:59:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 00:59:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 00:59:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 00:59:23,018 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-02 00:59:23,019 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2023-04-02 00:59:23,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 00:59:23,020 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2023-04-02 00:59:23,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 00:59:23,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 00:59:23,021 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2023-04-02 00:59:23,024 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2023-04-02 00:59:23,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 00:59:23,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 00:59:23,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 00:59:23,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 00:59:23,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 00:59:23,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 00:59:23,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 00:59:23,301 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 00:59:23,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 00:59:23,359 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-02 00:59:23,720 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 00:59:23,726 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 00:59:23,726 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-02 00:59:23,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:59:23 BoogieIcfgContainer [2023-04-02 00:59:23,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 00:59:23,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 00:59:23,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 00:59:23,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 00:59:23,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 12:59:22" (1/3) ... [2023-04-02 00:59:23,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0cb1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:59:23, skipping insertion in model container [2023-04-02 00:59:23,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:59:22" (2/3) ... [2023-04-02 00:59:23,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0cb1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:59:23, skipping insertion in model container [2023-04-02 00:59:23,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:59:23" (3/3) ... [2023-04-02 00:59:23,735 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-2.i [2023-04-02 00:59:23,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 00:59:23,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 00:59:23,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 00:59:23,814 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=PETRI_NET, 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;@5dc949f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 00:59:23,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 00:59:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 43 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 00:59:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 00:59:23,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:59:23,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:59:23,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:59:23,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:59:23,834 INFO L85 PathProgramCache]: Analyzing trace with hash -140425679, now seen corresponding path program 1 times [2023-04-02 00:59:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:59:23,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114449742] [2023-04-02 00:59:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:23,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:59:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:24,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:59:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:24,042 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 00:59:24,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:59:24,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114449742] [2023-04-02 00:59:24,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114449742] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:59:24,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:59:24,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 00:59:24,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229516319] [2023-04-02 00:59:24,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:59:24,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 00:59:24,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:59:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 00:59:24,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 00:59:24,088 INFO L87 Difference]: Start difference. First operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 43 states have internal predecessors, (59), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 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 00:59:24,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:59:24,267 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2023-04-02 00:59:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 00:59:24,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 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) Word has length 13 [2023-04-02 00:59:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:59:24,274 INFO L225 Difference]: With dead ends: 92 [2023-04-02 00:59:24,274 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 00:59:24,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 00:59:24,281 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 00:59:24,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 10 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 00:59:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 00:59:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-02 00:59:24,312 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 00:59:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-04-02 00:59:24,314 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-04-02 00:59:24,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:59:24,315 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-04-02 00:59:24,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 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 00:59:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-04-02 00:59:24,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 00:59:24,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:59:24,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:59:24,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 00:59:24,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:59:24,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:59:24,318 INFO L85 PathProgramCache]: Analyzing trace with hash -500866268, now seen corresponding path program 1 times [2023-04-02 00:59:24,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:59:24,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370805059] [2023-04-02 00:59:24,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:24,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:59:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:24,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:59:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:24,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:59:24,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370805059] [2023-04-02 00:59:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370805059] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:59:24,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:59:24,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 00:59:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727645975] [2023-04-02 00:59:24,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:59:24,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 00:59:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:59:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 00:59:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 00:59:24,561 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 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 00:59:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:59:24,654 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-04-02 00:59:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 00:59:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 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) Word has length 14 [2023-04-02 00:59:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:59:24,655 INFO L225 Difference]: With dead ends: 33 [2023-04-02 00:59:24,655 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 00:59:24,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 00:59:24,657 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 00:59:24,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 21 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 00:59:24,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 00:59:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2023-04-02 00:59:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 00:59:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-02 00:59:24,663 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2023-04-02 00:59:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:59:24,664 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-02 00:59:24,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 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 00:59:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-02 00:59:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 00:59:24,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:59:24,665 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:59:24,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 00:59:24,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:59:24,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:59:24,665 INFO L85 PathProgramCache]: Analyzing trace with hash -585734747, now seen corresponding path program 1 times [2023-04-02 00:59:24,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:59:24,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861605458] [2023-04-02 00:59:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:24,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:59:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:24,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:59:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:24,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:59:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861605458] [2023-04-02 00:59:24,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861605458] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:59:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305565722] [2023-04-02 00:59:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:24,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:59:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:59:25,001 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 00:59:25,005 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 00:59:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:25,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 00:59:25,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:59:25,250 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 00:59:25,259 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 00:59:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:25,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:59:25,347 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 21 [2023-04-02 00:59:25,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 00:59:25,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 00:59:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:25,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305565722] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:59:25,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:59:25,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 9 [2023-04-02 00:59:25,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477916981] [2023-04-02 00:59:25,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:59:25,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 00:59:25,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:59:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 00:59:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 00:59:25,394 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:59:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:59:25,527 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-04-02 00:59:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 00:59:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 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 00:59:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:59:25,529 INFO L225 Difference]: With dead ends: 37 [2023-04-02 00:59:25,529 INFO L226 Difference]: Without dead ends: 27 [2023-04-02 00:59:25,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-04-02 00:59:25,532 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 00:59:25,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 27 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 00:59:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-02 00:59:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-04-02 00:59:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 00:59:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-02 00:59:25,545 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2023-04-02 00:59:25,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:59:25,545 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-02 00:59:25,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:59:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-02 00:59:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 00:59:25,546 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:59:25,546 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:59:25,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 00:59:25,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:59:25,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:59:25,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:59:25,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1821561269, now seen corresponding path program 1 times [2023-04-02 00:59:25,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:59:25,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039067035] [2023-04-02 00:59:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:25,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:59:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:26,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:59:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:26,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:59:26,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039067035] [2023-04-02 00:59:26,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039067035] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:59:26,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188085775] [2023-04-02 00:59:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:26,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:59:26,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:59:26,080 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 00:59:26,082 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 00:59:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:26,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-02 00:59:26,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:59:26,227 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 00:59:26,295 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 00:59:26,305 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 00:59:26,305 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 00:59:26,352 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 18 [2023-04-02 00:59:26,398 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 00:59:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:26,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:59:26,510 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 169 treesize of output 161 [2023-04-02 00:59:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:26,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188085775] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:59:26,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:59:26,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-04-02 00:59:26,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830550225] [2023-04-02 00:59:26,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:59:26,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 00:59:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:59:26,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 00:59:26,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-04-02 00:59:26,648 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:59:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:59:26,935 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-04-02 00:59:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 00:59:26,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-02 00:59:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:59:26,938 INFO L225 Difference]: With dead ends: 27 [2023-04-02 00:59:26,938 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 00:59:26,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2023-04-02 00:59:26,939 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 00:59:26,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 40 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 00:59:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 00:59:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-04-02 00:59:26,943 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 00:59:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-02 00:59:26,944 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2023-04-02 00:59:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:59:26,944 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-02 00:59:26,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:59:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-02 00:59:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 00:59:26,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:59:26,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:59:26,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 00:59:27,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 00:59:27,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:59:27,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:59:27,154 INFO L85 PathProgramCache]: Analyzing trace with hash 784889118, now seen corresponding path program 1 times [2023-04-02 00:59:27,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:59:27,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959980888] [2023-04-02 00:59:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:27,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:59:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:27,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:59:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:27,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:59:27,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959980888] [2023-04-02 00:59:27,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959980888] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:59:27,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741763707] [2023-04-02 00:59:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:27,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:59:27,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:59:27,586 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 00:59:27,589 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 00:59:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:27,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-02 00:59:27,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:59:27,726 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 00:59:27,760 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 00:59:27,760 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 00:59:27,792 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 00:59:27,800 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 00:59:27,860 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-02 00:59:27,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2023-04-02 00:59:27,882 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 00:59:27,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2023-04-02 00:59:27,943 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 00:59:27,948 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 00:59:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:27,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:59:27,995 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 452 treesize of output 408 [2023-04-02 00:59:28,026 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~a~0.offset 4))) (and (forall ((v_ArrVal_183 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_183) c_main_~a~0.base) .cse0) c_main_~p~0.base)) (forall ((v_ArrVal_179 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_179) c_main_~a~0.base) .cse0) c_main_~p~0.offset)))) is different from false [2023-04-02 00:59:28,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:28,087 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 00:59:28,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:28,094 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-04-02 00:59:28,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-02 00:59:28,137 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-04-02 00:59:28,138 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2023-04-02 00:59:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-02 00:59:28,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741763707] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:59:28,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:59:28,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2023-04-02 00:59:28,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136568579] [2023-04-02 00:59:28,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:59:28,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 00:59:28,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:59:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 00:59:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=202, Unknown=1, NotChecked=28, Total=272 [2023-04-02 00:59:28,245 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:59:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:59:28,633 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-04-02 00:59:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 00:59:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 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 00:59:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:59:28,635 INFO L225 Difference]: With dead ends: 36 [2023-04-02 00:59:28,635 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 00:59:28,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=437, Unknown=1, NotChecked=44, Total=600 [2023-04-02 00:59:28,636 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 17 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 00:59:28,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 42 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 131 Invalid, 30 Unknown, 29 Unchecked, 0.2s Time] [2023-04-02 00:59:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 00:59:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2023-04-02 00:59:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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 00:59:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-02 00:59:28,643 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2023-04-02 00:59:28,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:59:28,643 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-02 00:59:28,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:59:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-02 00:59:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 00:59:28,644 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:59:28,644 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:59:28,653 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 00:59:28,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:59:28,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:59:28,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:59:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash 834623851, now seen corresponding path program 2 times [2023-04-02 00:59:28,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:59:28,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999512393] [2023-04-02 00:59:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:59:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:29,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:59:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:29,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:59:29,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999512393] [2023-04-02 00:59:29,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999512393] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:59:29,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094162948] [2023-04-02 00:59:29,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 00:59:29,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:59:29,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:59:29,355 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 00:59:29,381 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 00:59:29,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 00:59:29,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 00:59:29,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 00:59:29,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:59:29,510 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 00:59:29,536 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 00:59:29,537 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 00:59:29,580 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 00:59:29,589 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 00:59:29,648 INFO L321 Elim1Store]: treesize reduction 18, result has 21.7 percent of original size [2023-04-02 00:59:29,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-04-02 00:59:29,653 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 12 treesize of output 11 [2023-04-02 00:59:29,658 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 00:59:29,661 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 12 treesize of output 11 [2023-04-02 00:59:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:29,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:59:29,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:29,869 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 00:59:29,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:29,874 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 00:59:29,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:29,885 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 00:59:29,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:29,892 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 00:59:29,902 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_main_~a~0.offset 4)) (.cse2 (+ c_main_~p~0.offset 4))) (and (forall ((v_arrayElimArr_6 (Array Int Int)) (v_arrayElimArr_5 (Array Int Int))) (or (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_arrayElimArr_6))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_arrayElimArr_5) c_main_~a~0.base) .cse1)) (+ 4 (select (select .cse0 c_main_~a~0.base) .cse1)))) 0) (not (= (select v_arrayElimArr_6 .cse2) 0)) (not (= (select v_arrayElimArr_5 .cse2) 0)))) (forall ((v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int))) (or (= (select (let ((.cse3 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_arrayElimArr_3))) (select .cse3 (select (select .cse3 c_main_~a~0.base) .cse1))) (+ (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_arrayElimArr_4) c_main_~a~0.base) .cse1) 4)) 0) (not (= (select v_arrayElimArr_4 .cse2) 0)) (not (= (select v_arrayElimArr_3 .cse2) 0)))))) is different from false [2023-04-02 00:59:29,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:29,953 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 60 treesize of output 61 [2023-04-02 00:59:29,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:29,959 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 50 treesize of output 41 [2023-04-02 00:59:29,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:29,972 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 71 [2023-04-02 00:59:30,157 INFO L321 Elim1Store]: treesize reduction 42, result has 82.1 percent of original size [2023-04-02 00:59:30,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 208 treesize of output 335 [2023-04-02 00:59:30,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:30,203 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 137 treesize of output 109 [2023-04-02 00:59:30,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:30,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 166 [2023-04-02 00:59:36,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:36,775 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 60 treesize of output 61 [2023-04-02 00:59:36,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:36,783 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 50 treesize of output 41 [2023-04-02 00:59:36,830 INFO L321 Elim1Store]: treesize reduction 84, result has 25.0 percent of original size [2023-04-02 00:59:36,830 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 111 [2023-04-02 00:59:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 00:59:36,841 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 43 treesize of output 37 [2023-04-02 00:59:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 00:59:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 00:59:36,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 67 [2023-04-02 00:59:36,869 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 8 treesize of output 4 [2023-04-02 00:59:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-02 00:59:37,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094162948] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:59:37,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:59:37,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-04-02 00:59:37,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887041596] [2023-04-02 00:59:37,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:59:37,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 00:59:37,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:59:37,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 00:59:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=230, Unknown=1, NotChecked=30, Total=306 [2023-04-02 00:59:37,082 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:59:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:59:37,379 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-04-02 00:59:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 00:59:37,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 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 00:59:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:59:37,380 INFO L225 Difference]: With dead ends: 42 [2023-04-02 00:59:37,380 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 00:59:37,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=449, Unknown=1, NotChecked=44, Total=600 [2023-04-02 00:59:37,381 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 98 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 00:59:37,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 45 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 150 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2023-04-02 00:59:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 00:59:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-04-02 00:59:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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 00:59:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-04-02 00:59:37,386 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2023-04-02 00:59:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:59:37,386 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-04-02 00:59:37,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:59:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-04-02 00:59:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 00:59:37,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:59:37,387 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:59:37,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 00:59:37,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:59:37,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:59:37,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:59:37,594 INFO L85 PathProgramCache]: Analyzing trace with hash 830742551, now seen corresponding path program 3 times [2023-04-02 00:59:37,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:59:37,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821775588] [2023-04-02 00:59:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:37,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:59:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:38,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:59:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:38,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:59:38,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821775588] [2023-04-02 00:59:38,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821775588] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:59:38,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124027168] [2023-04-02 00:59:38,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 00:59:38,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:59:38,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:59:38,232 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 00:59:38,234 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 00:59:38,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 00:59:38,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 00:59:38,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 71 conjunts are in the unsatisfiable core [2023-04-02 00:59:38,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:59:38,388 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 00:59:38,421 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 00:59:38,422 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 00:59:38,456 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 00:59:38,465 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 00:59:38,502 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 00:59:38,509 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 00:59:38,514 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 00:59:38,528 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-04-02 00:59:38,529 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 16 treesize of output 18 [2023-04-02 00:59:38,599 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-04-02 00:59:38,600 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 69 [2023-04-02 00:59:38,608 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 27 treesize of output 22 [2023-04-02 00:59:38,621 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 31 treesize of output 26 [2023-04-02 00:59:38,699 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-04-02 00:59:38,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 77 [2023-04-02 00:59:38,707 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 26 treesize of output 28 [2023-04-02 00:59:38,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 00:59:38,715 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 00:59:38,722 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 16 treesize of output 15 [2023-04-02 00:59:38,787 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 00:59:38,787 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 73 treesize of output 40 [2023-04-02 00:59:38,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 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 00:59:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:38,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:59:38,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:38,833 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 00:59:38,840 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_348 (Array Int Int)) (v_arrayElimArr_11 (Array Int Int)) (v_ArrVal_352 (Array Int Int))) (or (not (= (select v_arrayElimArr_11 (+ c_main_~p~0.offset 4)) 0)) (= (let ((.cse0 (+ c_main_~a~0.offset 4))) (select (select (store |c_#memory_int| c_main_~p~0.base v_ArrVal_348) (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_352) c_main_~a~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_arrayElimArr_11) c_main_~a~0.base) .cse0))) 1))) is different from false [2023-04-02 00:59:38,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:38,944 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 57 treesize of output 61 [2023-04-02 00:59:38,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:38,954 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 70 [2023-04-02 00:59:38,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:38,965 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 131 [2023-04-02 00:59:38,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:38,974 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 99 treesize of output 97 [2023-04-02 00:59:38,980 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 45 treesize of output 27 [2023-04-02 00:59:39,009 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 8 treesize of output 4 [2023-04-02 00:59:39,027 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 8 treesize of output 4 [2023-04-02 00:59:39,039 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 30 treesize of output 22 [2023-04-02 00:59:39,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:39,137 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 29 treesize of output 30 [2023-04-02 00:59:39,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:39,144 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 85 [2023-04-02 00:59:39,148 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 70 treesize of output 62 [2023-04-02 00:59:39,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:39,156 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 72 treesize of output 56 [2023-04-02 00:59:39,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:39,220 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 34 treesize of output 35 [2023-04-02 00:59:39,222 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 00:59:39,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:39,229 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2023-04-02 00:59:39,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:39,238 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 41 treesize of output 33 [2023-04-02 00:59:39,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:39,286 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 25 treesize of output 26 [2023-04-02 00:59:39,288 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 00:59:39,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:39,295 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-04-02 00:59:39,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:39,300 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 20 treesize of output 20 [2023-04-02 00:59:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-04-02 00:59:39,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124027168] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 00:59:39,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 00:59:39,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2023-04-02 00:59:39,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474927153] [2023-04-02 00:59:39,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 00:59:39,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 00:59:39,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:59:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 00:59:39,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=384, Unknown=12, NotChecked=40, Total=506 [2023-04-02 00:59:39,553 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:59:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:59:40,230 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-04-02 00:59:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 00:59:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-02 00:59:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:59:40,231 INFO L225 Difference]: With dead ends: 42 [2023-04-02 00:59:40,231 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 00:59:40,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=860, Unknown=18, NotChecked=62, Total=1122 [2023-04-02 00:59:40,232 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 00:59:40,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 56 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 299 Invalid, 2 Unknown, 35 Unchecked, 0.3s Time] [2023-04-02 00:59:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 00:59:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-04-02 00:59:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 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 00:59:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-04-02 00:59:40,237 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2023-04-02 00:59:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:59:40,237 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-04-02 00:59:40,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 00:59:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-04-02 00:59:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 00:59:40,238 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:59:40,238 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:59:40,245 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 00:59:40,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:59:40,441 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:59:40,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:59:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1054646226, now seen corresponding path program 4 times [2023-04-02 00:59:40,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:59:40,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420314195] [2023-04-02 00:59:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:59:40,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:59:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:41,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:59:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:59:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:41,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:59:41,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420314195] [2023-04-02 00:59:41,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420314195] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 00:59:41,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510048926] [2023-04-02 00:59:41,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 00:59:41,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 00:59:41,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:59:41,273 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 00:59:41,297 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 00:59:41,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 00:59:41,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 00:59:41,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-02 00:59:41,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 00:59:41,424 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 00:59:41,454 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 00:59:41,454 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 00:59:41,496 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 00:59:41,501 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 00:59:41,563 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-02 00:59:41,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 31 treesize of output 29 [2023-04-02 00:59:41,579 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-04-02 00:59:41,579 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 00:59:41,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 00:59:41,587 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 14 treesize of output 16 [2023-04-02 00:59:41,639 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-04-02 00:59:41,639 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2023-04-02 00:59:41,645 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 82 [2023-04-02 00:59:41,721 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-04-02 00:59:41,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 134 [2023-04-02 00:59:41,739 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-04-02 00:59:41,739 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 133 treesize of output 123 [2023-04-02 00:59:41,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 73 [2023-04-02 00:59:41,847 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-04-02 00:59:41,848 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 118 treesize of output 49 [2023-04-02 00:59:41,851 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2023-04-02 00:59:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:59:41,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 00:59:41,910 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 1028 treesize of output 912 [2023-04-02 00:59:41,931 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_main_~a~0.offset 4))) (and (forall ((v_ArrVal_452 (Array Int Int)) (v_ArrVal_454 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_452))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_454) c_main_~a~0.base) .cse1)) (+ (select (select .cse0 c_main_~a~0.base) .cse1) 4))) c_main_~p~0.offset)) (forall ((v_ArrVal_452 (Array Int Int)) (v_ArrVal_454 (Array Int Int))) (= c_main_~p~0.base (select (let ((.cse2 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_454))) (select .cse2 (select (select .cse2 c_main_~a~0.base) .cse1))) (+ (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_452) c_main_~a~0.base) .cse1) 4)))) (forall ((v_ArrVal_452 (Array Int Int)) (v_ArrVal_454 (Array Int Int))) (let ((.cse6 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_452)) (.cse3 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_454))) (let ((.cse4 (select (select .cse3 c_main_~a~0.base) .cse1)) (.cse5 (+ (select (select .cse6 c_main_~a~0.base) .cse1) 4))) (or (not (= c_main_~p~0.base (select (select .cse3 .cse4) .cse5))) (not (= (select (select .cse6 .cse4) .cse5) (+ c_main_~p~0.offset 4))))))))) is different from false [2023-04-02 00:59:42,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:42,407 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 109 treesize of output 103 [2023-04-02 00:59:42,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:42,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 137 [2023-04-02 00:59:42,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-04-02 00:59:42,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:42,540 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 85 treesize of output 86 [2023-04-02 00:59:42,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:42,547 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 00:59:42,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:42,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 2718 treesize of output 1887 [2023-04-02 00:59:42,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:42,677 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 5316 treesize of output 4961 [2023-04-02 00:59:42,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:42,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 640 treesize of output 640 [2023-04-02 00:59:42,904 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 800 treesize of output 704 [2023-04-02 00:59:42,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:42,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 526 treesize of output 514 [2023-04-02 00:59:43,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 00:59:43,040 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 670 treesize of output 530 [2023-04-02 01:01:56,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:01:56,336 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 85 treesize of output 86 [2023-04-02 01:01:56,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:01:56,342 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 99 treesize of output 90 [2023-04-02 01:01:56,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:01:56,351 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 235 [2023-04-02 01:01:56,360 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 01:01:56,617 INFO L321 Elim1Store]: treesize reduction 122, result has 72.1 percent of original size [2023-04-02 01:01:56,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 2568 treesize of output 2321 [2023-04-02 01:01:56,690 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 566 treesize of output 510 [2023-04-02 01:01:56,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:01:56,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 410 [2023-04-02 01:01:56,750 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 311 [2023-04-02 01:01:56,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:01:56,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 510 treesize of output 374 [2023-04-02 01:02:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-04-02 01:02:11,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510048926] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:02:11,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:02:11,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2023-04-02 01:02:11,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717992007] [2023-04-02 01:02:11,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:02:11,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 01:02:11,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:02:11,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 01:02:11,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=553, Unknown=17, NotChecked=48, Total=702 [2023-04-02 01:02:11,132 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:02:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:02:16,197 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2023-04-02 01:02:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 01:02:16,198 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 1 states have call successors, (3), 2 states have call predecessors, (3), 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 01:02:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:02:16,198 INFO L225 Difference]: With dead ends: 45 [2023-04-02 01:02:16,198 INFO L226 Difference]: Without dead ends: 43 [2023-04-02 01:02:16,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=191, Invalid=1122, Unknown=23, NotChecked=70, Total=1406 [2023-04-02 01:02:16,201 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:02:16,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 79 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 418 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2023-04-02 01:02:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-02 01:02:16,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2023-04-02 01:02:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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 01:02:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-04-02 01:02:16,207 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2023-04-02 01:02:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:02:16,207 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-04-02 01:02:16,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:02:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-04-02 01:02:16,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 01:02:16,208 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:02:16,208 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:02:16,216 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 01:02:16,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:02:16,413 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:02:16,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:02:16,413 INFO L85 PathProgramCache]: Analyzing trace with hash -938498416, now seen corresponding path program 5 times [2023-04-02 01:02:16,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:02:16,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136432441] [2023-04-02 01:02:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:02:16,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:02:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:02:17,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:02:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:02:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:02:17,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:02:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136432441] [2023-04-02 01:02:17,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136432441] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:02:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654011950] [2023-04-02 01:02:17,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:02:17,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:02:17,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:02:17,266 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 01:02:17,293 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 01:02:17,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-04-02 01:02:17,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:02:17,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 86 conjunts are in the unsatisfiable core [2023-04-02 01:02:17,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:02:17,458 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 01:02:17,490 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 01:02:17,491 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 01:02:17,520 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 01:02:17,526 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 01:02:17,559 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 01:02:17,567 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 01:02:17,573 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 01:02:17,599 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-04-02 01:02:17,599 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 22 treesize of output 33 [2023-04-02 01:02:17,679 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-04-02 01:02:17,679 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 74 [2023-04-02 01:02:17,690 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 31 treesize of output 26 [2023-04-02 01:02:17,700 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 27 treesize of output 22 [2023-04-02 01:02:17,785 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-04-02 01:02:17,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 65 [2023-04-02 01:02:17,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:02:17,802 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-04-02 01:02:17,802 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 01:02:17,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:02:17,809 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 23 treesize of output 22 [2023-04-02 01:02:17,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:02:17,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:02:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:02:17,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2023-04-02 01:02:17,917 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-04-02 01:02:17,917 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 85 [2023-04-02 01:02:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:02:17,923 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 33 treesize of output 38 [2023-04-02 01:02:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:02:17,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2023-04-02 01:02:18,032 INFO L321 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2023-04-02 01:02:18,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 97 [2023-04-02 01:02:18,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:02:18,039 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 27 treesize of output 32 [2023-04-02 01:02:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:02:18,056 INFO L321 Elim1Store]: treesize reduction 29, result has 48.2 percent of original size [2023-04-02 01:02:18,057 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 1 case distinctions, treesize of input 35 treesize of output 54 [2023-04-02 01:02:18,078 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 30 treesize of output 24 [2023-04-02 01:02:18,173 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 01:02:18,174 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 58 treesize of output 33 [2023-04-02 01:02:18,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-02 01:02:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:02:18,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:02:18,240 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_591 (Array Int Int)) (v_ArrVal_593 (Array Int Int)) (v_ArrVal_592 (Array Int Int))) (= (let ((.cse0 (+ c_main_~a~0.offset 4))) (select (select (store |c_#memory_int| c_main_~p~0.base v_ArrVal_591) (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_593) c_main_~a~0.base) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_592) c_main_~a~0.base) .cse0))) 1)) is different from false [2023-04-02 01:02:18,258 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_586 Int) (v_ArrVal_591 (Array Int Int)) (v_ArrVal_593 (Array Int Int)) (v_ArrVal_592 (Array Int Int)) (v_ArrVal_587 (Array Int Int))) (= (let ((.cse1 (+ c_main_~a~0.offset 4))) (select (let ((.cse0 (+ c_main_~p~0.offset 4))) (select (store (store |c_#memory_int| c_main_~p~0.base (store (select |c_#memory_int| c_main_~p~0.base) .cse0 v_ArrVal_586)) c_main_~t~0.base v_ArrVal_591) (select (select (store (store |c_#memory_$Pointer$.base| c_main_~p~0.base (store (select |c_#memory_$Pointer$.base| c_main_~p~0.base) .cse0 c_main_~t~0.base)) c_main_~t~0.base v_ArrVal_593) c_main_~a~0.base) .cse1))) (select (select (store (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_587) c_main_~t~0.base v_ArrVal_592) c_main_~a~0.base) .cse1))) 1)) is different from false [2023-04-02 01:02:18,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:18,271 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 52 treesize of output 56 [2023-04-02 01:02:18,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:18,814 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 97 [2023-04-02 01:02:18,902 INFO L321 Elim1Store]: treesize reduction 121, result has 41.5 percent of original size [2023-04-02 01:02:18,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 145 [2023-04-02 01:02:18,993 INFO L321 Elim1Store]: treesize reduction 15, result has 93.0 percent of original size [2023-04-02 01:02:18,994 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 336 [2023-04-02 01:02:19,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:19,010 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 239 treesize of output 227 [2023-04-02 01:02:19,023 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 53 treesize of output 30 [2023-04-02 01:02:19,191 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 8 treesize of output 4 [2023-04-02 01:02:19,198 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 8 treesize of output 4 [2023-04-02 01:02:19,285 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 36 treesize of output 32 [2023-04-02 01:02:19,302 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 64 treesize of output 58 [2023-04-02 01:02:19,351 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 46 treesize of output 38 [2023-04-02 01:02:19,364 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 68 treesize of output 52 [2023-04-02 01:02:20,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:20,297 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 34 treesize of output 35 [2023-04-02 01:02:20,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:20,307 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 34 treesize of output 35 [2023-04-02 01:02:20,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:20,324 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 360 treesize of output 353 [2023-04-02 01:02:20,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:20,345 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 86 [2023-04-02 01:02:20,355 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 73 treesize of output 65 [2023-04-02 01:02:20,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:20,374 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 624 treesize of output 605 [2023-04-02 01:02:20,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:20,396 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 308 treesize of output 264 [2023-04-02 01:02:20,420 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 126 treesize of output 110 [2023-04-02 01:02:20,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:20,439 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 234 treesize of output 220 [2023-04-02 01:02:20,450 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 62 treesize of output 46 [2023-04-02 01:02:21,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:21,076 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 57 treesize of output 47 [2023-04-02 01:02:21,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:21,088 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 541 treesize of output 522 [2023-04-02 01:02:21,109 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 181 treesize of output 165 [2023-04-02 01:02:21,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:21,123 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 118 treesize of output 114 [2023-04-02 01:02:21,135 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 172 treesize of output 140 [2023-04-02 01:02:21,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:21,609 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 34 treesize of output 35 [2023-04-02 01:02:21,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:21,619 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 38 treesize of output 39 [2023-04-02 01:02:21,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:21,635 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 325 [2023-04-02 01:02:21,649 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 146 treesize of output 130 [2023-04-02 01:02:21,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:21,666 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 72 treesize of output 72 [2023-04-02 01:02:21,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:21,690 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 760 treesize of output 741 [2023-04-02 01:02:21,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:21,714 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 320 treesize of output 268 [2023-04-02 01:02:21,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:21,728 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 254 treesize of output 228 [2023-04-02 01:02:21,739 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 54 treesize of output 46 [2023-04-02 01:02:21,748 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 110 treesize of output 94 [2023-04-02 01:02:22,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:22,291 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 73 treesize of output 63 [2023-04-02 01:02:22,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:22,306 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 773 treesize of output 754 [2023-04-02 01:02:22,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:22,335 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 372 treesize of output 268 [2023-04-02 01:02:22,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:22,350 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 254 treesize of output 236 [2023-04-02 01:02:22,359 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 125 treesize of output 93 [2023-04-02 01:02:22,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:22,835 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 37 treesize of output 38 [2023-04-02 01:02:22,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:22,845 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 402 [2023-04-02 01:02:22,856 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 182 treesize of output 166 [2023-04-02 01:02:22,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:22,864 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 192 treesize of output 156 [2023-04-02 01:02:22,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:22,876 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 120 [2023-04-02 01:02:23,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:23,120 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 25 treesize of output 26 [2023-04-02 01:02:23,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:23,128 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 69 [2023-04-02 01:02:23,134 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 54 treesize of output 46 [2023-04-02 01:02:23,140 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 24 treesize of output 20 [2023-04-02 01:02:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2023-04-02 01:02:23,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654011950] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:02:23,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:02:23,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2023-04-02 01:02:23,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291474768] [2023-04-02 01:02:23,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:02:23,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 01:02:23,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:02:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 01:02:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=597, Unknown=7, NotChecked=102, Total=812 [2023-04-02 01:02:23,814 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:02:35,536 WARN L223 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 65 DAG size of output: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:02:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:02:36,185 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2023-04-02 01:02:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 01:02:36,185 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-02 01:02:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:02:36,186 INFO L225 Difference]: With dead ends: 63 [2023-04-02 01:02:36,186 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 01:02:36,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=280, Invalid=1524, Unknown=10, NotChecked=166, Total=1980 [2023-04-02 01:02:36,187 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 120 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 27 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:02:36,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 68 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 429 Invalid, 29 Unknown, 91 Unchecked, 1.3s Time] [2023-04-02 01:02:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 01:02:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2023-04-02 01:02:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 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 01:02:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-04-02 01:02:36,195 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 29 [2023-04-02 01:02:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:02:36,195 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-04-02 01:02:36,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:02:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-04-02 01:02:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 01:02:36,196 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:02:36,196 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:02:36,204 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 01:02:36,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:02:36,401 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:02:36,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:02:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1284817463, now seen corresponding path program 6 times [2023-04-02 01:02:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:02:36,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978470090] [2023-04-02 01:02:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:02:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:02:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:02:37,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:02:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:02:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:02:37,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:02:37,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978470090] [2023-04-02 01:02:37,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978470090] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:02:37,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689869675] [2023-04-02 01:02:37,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:02:37,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:02:37,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:02:37,337 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 01:02:37,339 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 01:02:37,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-04-02 01:02:37,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:02:37,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 69 conjunts are in the unsatisfiable core [2023-04-02 01:02:37,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:02:37,510 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 01:02:37,560 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 01:02:37,561 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 01:02:37,608 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 01:02:37,616 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 01:02:37,668 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-04-02 01:02:37,669 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 16 treesize of output 18 [2023-04-02 01:02:37,676 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 14 treesize of output 16 [2023-04-02 01:02:37,685 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 14 treesize of output 16 [2023-04-02 01:02:37,751 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-04-02 01:02:37,752 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 51 [2023-04-02 01:02:37,762 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 27 treesize of output 22 [2023-04-02 01:02:37,862 INFO L321 Elim1Store]: treesize reduction 58, result has 15.9 percent of original size [2023-04-02 01:02:37,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 70 [2023-04-02 01:02:37,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 01:02:37,873 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 61 treesize of output 60 [2023-04-02 01:02:37,877 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 26 treesize of output 25 [2023-04-02 01:02:37,884 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 26 treesize of output 25 [2023-04-02 01:02:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:02:38,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:02:38,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:38,368 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 01:02:38,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:38,374 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 01:02:38,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:38,392 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 01:02:38,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:38,400 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 81 treesize of output 75 [2023-04-02 01:02:38,420 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_main_~a~0.offset 4)) (.cse0 (+ c_main_~p~0.offset 4))) (and (forall ((v_arrayElimArr_37 (Array Int Int)) (v_arrayElimArr_38 (Array Int Int))) (or (not (= (select v_arrayElimArr_38 .cse0) 0)) (= (let ((.cse1 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_arrayElimArr_38)) (.cse2 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_arrayElimArr_37))) (let ((.cse3 (select (select .cse2 c_main_~a~0.base) .cse5)) (.cse4 (+ (select (select .cse1 c_main_~a~0.base) .cse5) 4))) (select (select .cse1 (select (select .cse2 .cse3) .cse4)) (+ (select (select .cse1 .cse3) .cse4) 4)))) 0) (not (= (select v_arrayElimArr_37 .cse0) 0)))) (forall ((v_arrayElimArr_39 (Array Int Int)) (v_arrayElimArr_40 (Array Int Int))) (or (= (let ((.cse9 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_arrayElimArr_40)) (.cse6 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_arrayElimArr_39))) (let ((.cse7 (select (select .cse6 c_main_~a~0.base) .cse5)) (.cse8 (+ (select (select .cse9 c_main_~a~0.base) .cse5) 4))) (select (select .cse6 (select (select .cse6 .cse7) .cse8)) (+ (select (select .cse9 .cse7) .cse8) 4)))) 0) (not (= (select v_arrayElimArr_40 .cse0) 0)) (not (= (select v_arrayElimArr_39 .cse0) 0)))))) is different from false [2023-04-02 01:02:38,519 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse8 (+ c_main_~p~0.offset 4))) (let ((.cse5 (+ c_main_~a~0.offset 4)) (.cse6 (store |c_#memory_$Pointer$.base| c_main_~p~0.base (store (select |c_#memory_$Pointer$.base| c_main_~p~0.base) .cse8 c_main_~t~0.base))) (.cse7 (select |c_#memory_$Pointer$.offset| c_main_~p~0.base))) (and (forall ((v_arrayElimArr_37 (Array Int Int)) (v_arrayElimArr_38 (Array Int Int)) (v_main_~p~0.offset_74 Int)) (let ((.cse0 (+ v_main_~p~0.offset_74 4))) (or (not (= (select v_arrayElimArr_38 .cse0) 0)) (= (let ((.cse1 (store (store |c_#memory_$Pointer$.offset| c_main_~p~0.base (store .cse7 .cse8 v_main_~p~0.offset_74)) c_main_~t~0.base v_arrayElimArr_38)) (.cse2 (store .cse6 c_main_~t~0.base v_arrayElimArr_37))) (let ((.cse3 (select (select .cse2 c_main_~a~0.base) .cse5)) (.cse4 (+ (select (select .cse1 c_main_~a~0.base) .cse5) 4))) (select (select .cse1 (select (select .cse2 .cse3) .cse4)) (+ (select (select .cse1 .cse3) .cse4) 4)))) 0) (not (= (select v_arrayElimArr_37 .cse0) 0))))) (forall ((v_arrayElimArr_39 (Array Int Int)) (v_main_~p~0.offset_74 Int) (v_arrayElimArr_40 (Array Int Int))) (let ((.cse9 (+ v_main_~p~0.offset_74 4))) (or (not (= (select v_arrayElimArr_39 .cse9) 0)) (= (let ((.cse13 (store (store |c_#memory_$Pointer$.offset| c_main_~p~0.base (store .cse7 .cse8 v_main_~p~0.offset_74)) c_main_~t~0.base v_arrayElimArr_40)) (.cse10 (store .cse6 c_main_~t~0.base v_arrayElimArr_39))) (let ((.cse11 (select (select .cse10 c_main_~a~0.base) .cse5)) (.cse12 (+ 4 (select (select .cse13 c_main_~a~0.base) .cse5)))) (select (select .cse10 (select (select .cse10 .cse11) .cse12)) (+ (select (select .cse13 .cse11) .cse12) 4)))) 0) (not (= (select v_arrayElimArr_40 .cse9) 0)))))))) is different from false [2023-04-02 01:02:38,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:38,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 279 treesize of output 274 [2023-04-02 01:02:38,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:38,586 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 260 treesize of output 234 [2023-04-02 01:02:38,657 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 13 treesize of output 1 [2023-04-02 01:02:38,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:38,875 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 185 treesize of output 156 [2023-04-02 01:02:38,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:02:38,886 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 145 treesize of output 126 [2023-04-02 01:02:43,348 INFO L321 Elim1Store]: treesize reduction 62, result has 98.6 percent of original size [2023-04-02 01:02:43,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 21 new quantified variables, introduced 91 case distinctions, treesize of input 56536 treesize of output 49609 [2023-04-02 01:02:47,188 INFO L321 Elim1Store]: treesize reduction 414, result has 57.9 percent of original size [2023-04-02 01:02:47,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 128599 treesize of output 112360 [2023-04-02 01:02:52,324 WARN L223 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 1340 DAG size of output: 1128 (called from [L 809] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-04-02 01:03:00,123 WARN L223 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 401 DAG size of output: 397 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-04-02 01:03:00,130 INFO L321 Elim1Store]: treesize reduction 12, result has 98.8 percent of original size [2023-04-02 01:03:00,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 19 new quantified variables, introduced 91 case distinctions, treesize of input 39439 treesize of output 39079 [2023-04-02 01:03:07,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 01:03:07,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51883 treesize of output 34699 [2023-04-02 01:03:10,797 INFO L217 Elim1Store]: Index analysis took 188 ms [2023-04-02 01:03:16,101 WARN L223 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 397 DAG size of output: 393 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-04-02 01:03:16,102 INFO L321 Elim1Store]: treesize reduction 10, result has 98.7 percent of original size [2023-04-02 01:03:16,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 18 new quantified variables, introduced 91 case distinctions, treesize of input 26309 treesize of output 25881 [2023-04-02 01:03:25,885 WARN L223 SmtUtils]: Spent 9.78s on a formula simplification. DAG size of input: 1732 DAG size of output: 1723 (called from [L 809] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)