/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:14:44,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:14:44,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:14:44,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:14:44,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:14:44,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:14:44,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:14:44,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:14:44,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:14:44,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:14:44,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:14:44,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:14:44,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:14:44,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:14:44,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:14:44,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:14:44,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:14:44,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:14:44,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:14:44,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:14:44,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:14:44,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:14:44,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:14:44,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:14:44,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:14:44,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:14:44,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:14:44,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:14:44,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:14:44,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:14:44,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:14:44,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:14:44,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:14:44,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:14:44,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:14:44,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:14:44,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:14:44,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:14:44,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:14:44,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:14:44,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:14:44,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:14:44,965 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:14:44,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:14:44,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:14:44,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:14:44,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:14:44,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:14:44,966 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:14:44,966 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:14:44,967 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:14:44,967 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:14:44,967 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:14:44,967 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:14:44,968 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:14:44,968 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:14:44,968 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:14:44,968 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:14:44,968 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:14:44,968 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:14:44,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:14:44,969 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:14:44,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:14:44,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:14:44,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:14:44,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:14:44,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:14:44,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:14:44,970 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:14:44,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:14:44,970 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:14:44,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:14:44,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:14:44,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:14:44,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:14:44,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:14:44,971 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:14:44,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:14:44,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:14:44,971 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:14:44,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:14:44,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:14:44,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:14:44,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:14:45,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:14:45,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:14:45,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:14:45,200 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:14:45,201 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:14:45,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2023-04-02 14:14:46,242 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:14:46,450 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:14:46,451 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2023-04-02 14:14:46,455 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aba82ea7/9d4018feef3240f2b1f7c9abc4e506be/FLAGa1bfe6335 [2023-04-02 14:14:46,467 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aba82ea7/9d4018feef3240f2b1f7c9abc4e506be [2023-04-02 14:14:46,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:14:46,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:14:46,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:14:46,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:14:46,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:14:46,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ec628f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46, skipping insertion in model container [2023-04-02 14:14:46,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:14:46,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:14:46,610 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/array-examples/standard_strcpy_ground-1.i[853,866] [2023-04-02 14:14:46,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:14:46,632 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:14:46,643 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/array-examples/standard_strcpy_ground-1.i[853,866] [2023-04-02 14:14:46,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:14:46,665 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:14:46,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46 WrapperNode [2023-04-02 14:14:46,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:14:46,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:14:46,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:14:46,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:14:46,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,689 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:14:46,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:14:46,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:14:46,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:14:46,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46" (1/1) ... [2023-04-02 14:14:46,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:14:46,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:14:46,726 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 14:14:46,727 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 14:14:46,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:14:46,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:14:46,751 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:14:46,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:14:46,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:14:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:14:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:14:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:14:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:14:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:14:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:14:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:14:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:14:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:14:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:14:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:14:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:14:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:14:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:14:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:14:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:14:46,832 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:14:46,833 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:14:46,952 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:14:46,976 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:14:46,976 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 14:14:46,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:14:46 BoogieIcfgContainer [2023-04-02 14:14:46,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:14:46,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:14:46,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:14:46,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:14:46,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:14:46" (1/3) ... [2023-04-02 14:14:46,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf77285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:14:46, skipping insertion in model container [2023-04-02 14:14:46,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:14:46" (2/3) ... [2023-04-02 14:14:46,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf77285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:14:46, skipping insertion in model container [2023-04-02 14:14:46,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:14:46" (3/3) ... [2023-04-02 14:14:46,986 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2023-04-02 14:14:47,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:14:47,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:14:47,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:14:47,038 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3912a060, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:14:47,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:14:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:14:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 14:14:47,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:14:47,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:14:47,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:14:47,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:14:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1041809, now seen corresponding path program 1 times [2023-04-02 14:14:47,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:14:47,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013908953] [2023-04-02 14:14:47,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:47,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:14:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:47,178 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 14:14:47,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:14:47,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013908953] [2023-04-02 14:14:47,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013908953] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:14:47,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:14:47,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 14:14:47,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287822846] [2023-04-02 14:14:47,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:14:47,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 14:14:47,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:14:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 14:14:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 14:14:47,209 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 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 14:14:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:14:47,259 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-04-02 14:14:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 14:14:47,261 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 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 13 [2023-04-02 14:14:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:14:47,266 INFO L225 Difference]: With dead ends: 34 [2023-04-02 14:14:47,267 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 14:14:47,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 14:14:47,272 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:14:47,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:14:47,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 14:14:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-02 14:14:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:14:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 14:14:47,323 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2023-04-02 14:14:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:14:47,324 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 14:14:47,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 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 14:14:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 14:14:47,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 14:14:47,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:14:47,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:14:47,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:14:47,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:14:47,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:14:47,331 INFO L85 PathProgramCache]: Analyzing trace with hash -942771522, now seen corresponding path program 1 times [2023-04-02 14:14:47,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:14:47,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480227365] [2023-04-02 14:14:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:47,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:14:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:47,470 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 14:14:47,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:14:47,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480227365] [2023-04-02 14:14:47,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480227365] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:14:47,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:14:47,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:14:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363047380] [2023-04-02 14:14:47,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:14:47,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:14:47,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:14:47,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:14:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:14:47,474 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 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 14:14:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:14:47,488 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-04-02 14:14:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:14:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 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 14 [2023-04-02 14:14:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:14:47,490 INFO L225 Difference]: With dead ends: 31 [2023-04-02 14:14:47,490 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 14:14:47,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:14:47,492 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:14:47,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:14:47,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 14:14:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-02 14:14:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:14:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-04-02 14:14:47,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2023-04-02 14:14:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:14:47,497 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-04-02 14:14:47,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 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 14:14:47,498 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-04-02 14:14:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 14:14:47,498 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:14:47,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:14:47,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 14:14:47,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:14:47,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:14:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1748477900, now seen corresponding path program 1 times [2023-04-02 14:14:47,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:14:47,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614395131] [2023-04-02 14:14:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:47,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:14:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:14:47,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:14:47,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614395131] [2023-04-02 14:14:47,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614395131] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:14:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421508625] [2023-04-02 14:14:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:47,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:14:47,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:14:47,606 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 14:14:47,607 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 14:14:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:47,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:14:47,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:14:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:14:47,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:14:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:14:47,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421508625] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:14:47,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282973022] [2023-04-02 14:14:47,781 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:14:47,781 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:14:47,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:14:47,793 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:14:47,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:14:47,895 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:14:48,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:14:48,156 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:14:48,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [282973022] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:14:48,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:14:48,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 4, 4] total 16 [2023-04-02 14:14:48,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163968774] [2023-04-02 14:14:48,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:14:48,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 14:14:48,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:14:48,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 14:14:48,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-04-02 14:14:48,569 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 3 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 14:14:49,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:14:49,318 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-04-02 14:14:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 14:14:49,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 3 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 15 [2023-04-02 14:14:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:14:49,321 INFO L225 Difference]: With dead ends: 44 [2023-04-02 14:14:49,321 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 14:14:49,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2023-04-02 14:14:49,322 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:14:49,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 8 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:14:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 14:14:49,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2023-04-02 14:14:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:14:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-02 14:14:49,330 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2023-04-02 14:14:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:14:49,330 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-02 14:14:49,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (3), 3 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 14:14:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-02 14:14:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 14:14:49,331 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:14:49,331 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:14:49,343 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 14:14:49,541 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 14:14:49,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:14:49,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:14:49,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2069964037, now seen corresponding path program 1 times [2023-04-02 14:14:49,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:14:49,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94944442] [2023-04-02 14:14:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:49,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:14:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:14:49,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:14:49,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94944442] [2023-04-02 14:14:49,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94944442] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:14:49,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438622817] [2023-04-02 14:14:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:49,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:14:49,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:14:49,661 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 14:14:49,666 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 14:14:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:49,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:14:49,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:14:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:14:49,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:14:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:14:49,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438622817] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:14:49,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1832688247] [2023-04-02 14:14:49,756 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:14:49,756 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:14:49,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:14:49,757 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:14:49,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:14:49,778 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:14:50,029 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:14:50,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:14:50,054 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:14:50,557 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '500#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#src~0.base_BEFORE_CALL_1| Int) (|v_main_~#dst~0.base_BEFORE_CALL_1| Int)) (and (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_1|) 0))) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_1|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#dst~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_1| |v_main_~#dst~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_1|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:14:50,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:14:50,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:14:50,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:14:50,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186274539] [2023-04-02 14:14:50,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:14:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:14:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:14:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:14:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:14:50,559 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 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 14:14:50,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:14:50,586 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-04-02 14:14:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:14:50,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 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 14:14:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:14:50,593 INFO L225 Difference]: With dead ends: 38 [2023-04-02 14:14:50,593 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 14:14:50,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:14:50,597 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:14:50,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:14:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 14:14:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 14:14:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:14:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-02 14:14:50,611 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2023-04-02 14:14:50,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:14:50,611 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-02 14:14:50,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 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 14:14:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-02 14:14:50,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 14:14:50,612 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:14:50,612 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:14:50,623 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 14:14:50,817 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 14:14:50,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:14:50,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:14:50,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1456233235, now seen corresponding path program 2 times [2023-04-02 14:14:50,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:14:50,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905651651] [2023-04-02 14:14:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:50,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:14:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:14:50,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:14:50,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905651651] [2023-04-02 14:14:50,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905651651] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:14:50,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784277931] [2023-04-02 14:14:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:14:50,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:14:50,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:14:50,968 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 14:14:50,976 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 14:14:51,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:14:51,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:14:51,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 14:14:51,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:14:51,070 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 10 treesize of output 8 [2023-04-02 14:14:51,143 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 15 treesize of output 15 [2023-04-02 14:14:51,194 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 26 treesize of output 10 [2023-04-02 14:14:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:14:51,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:14:51,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:14:51,279 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 82 treesize of output 78 [2023-04-02 14:14:51,306 INFO L321 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-04-02 14:14:51,306 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 74 treesize of output 72 [2023-04-02 14:14:51,331 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-02 14:14:51,331 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 16 [2023-04-02 14:14:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:14:51,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784277931] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:14:51,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1607356292] [2023-04-02 14:14:51,392 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:14:51,392 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:14:51,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:14:51,393 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:14:51,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:14:51,412 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:14:51,591 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:14:51,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:14:51,628 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:14:52,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '741#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#dst~0.base_BEFORE_CALL_2| Int) (|v_main_~#src~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#dst~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_2|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_2| |v_main_~#dst~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_2|) 0))) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_2|) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_2|))) (= |#NULL.base| 0))' at error location [2023-04-02 14:14:52,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:14:52,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:14:52,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2023-04-02 14:14:52,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206471747] [2023-04-02 14:14:52,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:14:52,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 14:14:52,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:14:52,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 14:14:52,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2023-04-02 14:14:52,329 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:14:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:14:52,541 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-04-02 14:14:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 14:14:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-02 14:14:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:14:52,543 INFO L225 Difference]: With dead ends: 46 [2023-04-02 14:14:52,543 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 14:14:52,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:14:52,545 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:14:52,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 90 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:14:52,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 14:14:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-04-02 14:14:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:14:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-04-02 14:14:52,555 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2023-04-02 14:14:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:14:52,555 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-04-02 14:14:52,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:14:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-04-02 14:14:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 14:14:52,556 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:14:52,556 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:14:52,564 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 14:14:52,762 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 14:14:52,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:14:52,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:14:52,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1960782437, now seen corresponding path program 1 times [2023-04-02 14:14:52,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:14:52,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382379966] [2023-04-02 14:14:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:52,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:14:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:14:52,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:14:52,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382379966] [2023-04-02 14:14:52,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382379966] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:14:52,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218231985] [2023-04-02 14:14:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:52,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:14:52,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:14:52,857 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 14:14:52,860 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 14:14:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:52,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 14:14:52,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:14:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 14:14:52,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:14:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:14:53,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218231985] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:14:53,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104913211] [2023-04-02 14:14:53,005 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 14:14:53,005 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:14:53,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:14:53,005 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:14:53,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:14:53,018 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:14:53,345 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:14:53,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:14:53,377 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:14:54,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1064#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#src~0.base_BEFORE_CALL_7| Int) (|v_main_~#dst~0.base_BEFORE_CALL_7| Int) (v_main_~x~0_BEFORE_CALL_7 Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_7|) (<= 1 (+ v_main_~x~0_BEFORE_CALL_7 |#StackHeapBarrier|)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (<= 2 (+ v_main_~x~0_BEFORE_CALL_7 |v_main_~#dst~0.base_BEFORE_CALL_7|)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_7| |v_main_~#dst~0.base_BEFORE_CALL_7|)) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_7|) (* v_main_~x~0_BEFORE_CALL_7 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_7|) (* v_main_~x~0_BEFORE_CALL_7 4)))) (<= 0 v_main_~x~0_BEFORE_CALL_7) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_7|) (<= 2 (+ v_main_~x~0_BEFORE_CALL_7 |v_main_~#src~0.base_BEFORE_CALL_7|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#dst~0.base_BEFORE_CALL_7|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_7|) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_7|))) (= |#NULL.base| 0))' at error location [2023-04-02 14:14:54,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:14:54,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:14:54,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-04-02 14:14:54,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340942436] [2023-04-02 14:14:54,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:14:54,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 14:14:54,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:14:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 14:14:54,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2023-04-02 14:14:54,045 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:14:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:14:54,074 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-04-02 14:14:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 14:14:54,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-04-02 14:14:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:14:54,076 INFO L225 Difference]: With dead ends: 58 [2023-04-02 14:14:54,076 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 14:14:54,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2023-04-02 14:14:54,077 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:14:54,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:14:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 14:14:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-02 14:14:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:14:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-04-02 14:14:54,088 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 28 [2023-04-02 14:14:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:14:54,088 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-04-02 14:14:54,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:14:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-04-02 14:14:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 14:14:54,089 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:14:54,089 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:14:54,099 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 14:14:54,295 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 14:14:54,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:14:54,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:14:54,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1558793805, now seen corresponding path program 2 times [2023-04-02 14:14:54,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:14:54,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015849358] [2023-04-02 14:14:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:54,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:14:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:14:54,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:14:54,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015849358] [2023-04-02 14:14:54,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015849358] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:14:54,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550942668] [2023-04-02 14:14:54,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:14:54,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:14:54,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:14:54,538 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 14:14:54,540 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 14:14:54,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:14:54,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:14:54,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 14:14:54,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:14:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-02 14:14:54,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:14:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-02 14:14:54,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550942668] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:14:54,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111156019] [2023-04-02 14:14:54,745 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 14:14:54,745 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:14:54,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:14:54,746 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:14:54,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:14:54,762 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:14:55,098 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:14:55,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:14:55,130 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:14:55,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1459#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#src~0.base_BEFORE_CALL_14| Int) (v_main_~x~0_BEFORE_CALL_16 Int) (|v_main_~#dst~0.base_BEFORE_CALL_14| Int)) (and (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_14| |#StackHeapBarrier|)) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_14| |#StackHeapBarrier|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_14|) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_14| v_main_~x~0_BEFORE_CALL_16)) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_14|) (* v_main_~x~0_BEFORE_CALL_16 4)) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_14|) (* v_main_~x~0_BEFORE_CALL_16 4)))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_14|) (<= 0 v_main_~x~0_BEFORE_CALL_16) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_14| v_main_~x~0_BEFORE_CALL_16)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_14|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_14| |v_main_~#dst~0.base_BEFORE_CALL_14|)) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_16)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_14|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:14:55,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:14:55,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:14:55,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 21 [2023-04-02 14:14:55,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842391158] [2023-04-02 14:14:55,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:14:55,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 14:14:55,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:14:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 14:14:55,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 14:14:55,907 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:14:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:14:56,139 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-04-02 14:14:56,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 14:14:56,141 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2023-04-02 14:14:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:14:56,142 INFO L225 Difference]: With dead ends: 66 [2023-04-02 14:14:56,142 INFO L226 Difference]: Without dead ends: 41 [2023-04-02 14:14:56,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 14:14:56,144 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:14:56,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:14:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-02 14:14:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-02 14:14:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:14:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-04-02 14:14:56,156 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2023-04-02 14:14:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:14:56,156 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-04-02 14:14:56,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:14:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-04-02 14:14:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 14:14:56,157 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:14:56,157 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:14:56,162 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 14:14:56,360 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 14:14:56,361 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:14:56,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:14:56,361 INFO L85 PathProgramCache]: Analyzing trace with hash 157426454, now seen corresponding path program 3 times [2023-04-02 14:14:56,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:14:56,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134383166] [2023-04-02 14:14:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:56,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:14:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 14:14:56,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:14:56,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134383166] [2023-04-02 14:14:56,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134383166] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:14:56,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674526274] [2023-04-02 14:14:56,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:14:56,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:14:56,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:14:56,586 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 14:14:56,612 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 14:14:56,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:14:56,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:14:56,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 14:14:56,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:14:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:14:56,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:14:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 14:14:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674526274] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:14:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2099990813] [2023-04-02 14:14:56,991 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 14:14:56,991 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:14:56,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:14:56,991 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:14:56,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:14:57,004 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:14:57,314 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:14:57,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:14:57,354 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:14:58,069 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1926#(and (exists ((|v_main_~#dst~0.base_BEFORE_CALL_21| Int) (|v_main_~#src~0.base_BEFORE_CALL_21| Int) (v_main_~x~0_BEFORE_CALL_23 Int)) (and (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_21|) (* v_main_~x~0_BEFORE_CALL_23 4)) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_21|) (* v_main_~x~0_BEFORE_CALL_23 4)))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_21|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_21| |v_main_~#dst~0.base_BEFORE_CALL_21|)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_21|) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_21| v_main_~x~0_BEFORE_CALL_23)) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_21| v_main_~x~0_BEFORE_CALL_23)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_21| |#StackHeapBarrier|)) (<= 0 v_main_~x~0_BEFORE_CALL_23) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_21| |#StackHeapBarrier|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_21|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_21|) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_23)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:14:58,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:14:58,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:14:58,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-04-02 14:14:58,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363643060] [2023-04-02 14:14:58,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:14:58,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 14:14:58,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:14:58,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 14:14:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 14:14:58,072 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:14:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:14:58,123 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2023-04-02 14:14:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 14:14:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-04-02 14:14:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:14:58,124 INFO L225 Difference]: With dead ends: 78 [2023-04-02 14:14:58,124 INFO L226 Difference]: Without dead ends: 56 [2023-04-02 14:14:58,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 14:14:58,126 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:14:58,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:14:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-02 14:14:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-04-02 14:14:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:14:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2023-04-02 14:14:58,138 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 38 [2023-04-02 14:14:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:14:58,140 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2023-04-02 14:14:58,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:14:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2023-04-02 14:14:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 14:14:58,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:14:58,141 INFO L195 NwaCegarLoop]: trace histogram [28, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:14:58,146 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 14:14:58,342 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 14:14:58,343 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:14:58,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:14:58,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1259117028, now seen corresponding path program 4 times [2023-04-02 14:14:58,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:14:58,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119138201] [2023-04-02 14:14:58,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:14:58,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:14:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 14:14:59,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:14:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119138201] [2023-04-02 14:14:59,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119138201] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:14:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183414825] [2023-04-02 14:14:59,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:14:59,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:14:59,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:14:59,055 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 14:14:59,057 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 14:14:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:14:59,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-02 14:14:59,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:14:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:14:59,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 14:15:00,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183414825] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:00,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427531858] [2023-04-02 14:15:00,177 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 14:15:00,177 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:00,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:00,177 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:00,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:00,191 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:00,499 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:15:00,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:00,528 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:01,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2542#(and (<= 1 |#StackHeapBarrier|) (exists ((v_main_~x~0_BEFORE_CALL_30 Int) (|v_main_~#src~0.base_BEFORE_CALL_28| Int) (|v_main_~#dst~0.base_BEFORE_CALL_28| Int)) (and (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_28| v_main_~x~0_BEFORE_CALL_30)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_28|) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_28| v_main_~x~0_BEFORE_CALL_30)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_28|) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_28|) (<= 0 v_main_~x~0_BEFORE_CALL_30) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_28| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_28| |v_main_~#dst~0.base_BEFORE_CALL_28|)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_28| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_28|) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_28|) (* v_main_~x~0_BEFORE_CALL_30 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_28|) (* v_main_~x~0_BEFORE_CALL_30 4)))) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_30)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:15:01,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:15:01,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:01,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2023-04-02 14:15:01,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944818734] [2023-04-02 14:15:01,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:15:01,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-04-02 14:15:01,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:01,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-04-02 14:15:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1877, Invalid=3525, Unknown=0, NotChecked=0, Total=5402 [2023-04-02 14:15:01,485 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 61 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:15:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:01,569 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2023-04-02 14:15:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-04-02 14:15:01,570 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 61 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2023-04-02 14:15:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:01,571 INFO L225 Difference]: With dead ends: 108 [2023-04-02 14:15:01,571 INFO L226 Difference]: Without dead ends: 86 [2023-04-02 14:15:01,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1877, Invalid=3525, Unknown=0, NotChecked=0, Total=5402 [2023-04-02 14:15:01,574 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:01,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:15:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-02 14:15:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-04-02 14:15:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:15:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2023-04-02 14:15:01,616 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 53 [2023-04-02 14:15:01,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:01,616 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2023-04-02 14:15:01,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 61 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:15:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2023-04-02 14:15:01,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-02 14:15:01,623 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:01,623 INFO L195 NwaCegarLoop]: trace histogram [58, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:01,629 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 14:15:01,829 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 14:15:01,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:01,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:01,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1684994140, now seen corresponding path program 5 times [2023-04-02 14:15:01,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:01,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040876073] [2023-04-02 14:15:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:01,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 2 proven. 1711 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 14:15:04,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040876073] [2023-04-02 14:15:04,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040876073] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13091997] [2023-04-02 14:15:04,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:15:04,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:04,256 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 14:15:04,258 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 14:15:04,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:15:04,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:15:04,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 14:15:04,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:04,379 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 10 treesize of output 8 [2023-04-02 14:15:04,656 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 17 treesize of output 17 [2023-04-02 14:15:06,749 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#dst~0.base_BEFORE_CALL_31| Int) (|v_main_~#dst~0.offset_BEFORE_CALL_31| Int) (|v_main_~#src~0.base_BEFORE_CALL_31| Int)) (and (= (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_31|) 4) (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_31|) (+ |v_main_~#dst~0.offset_BEFORE_CALL_31| 4))) (not (= |v_main_~#src~0.base_BEFORE_CALL_31| |v_main_~#dst~0.base_BEFORE_CALL_31|)))) is different from true [2023-04-02 14:15:11,006 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 30 treesize of output 10 [2023-04-02 14:15:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 1 not checked. [2023-04-02 14:15:13,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:15,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:15:15,309 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 92 treesize of output 88 [2023-04-02 14:15:15,358 INFO L321 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2023-04-02 14:15:15,359 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 34 treesize of output 36 [2023-04-02 14:15:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-04-02 14:15:15,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13091997] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:15,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1198485759] [2023-04-02 14:15:15,520 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 14:15:15,520 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:15,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:15,520 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:15,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:15,537 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:15,866 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:15:15,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:15,898 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:25,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3476#(and (exists ((|v_main_~#src~0.base_BEFORE_CALL_37| Int) (v_main_~x~0_BEFORE_CALL_39 Int) (|v_main_~#dst~0.base_BEFORE_CALL_37| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_37|) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_37| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_37|) (* v_main_~x~0_BEFORE_CALL_39 4)) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_37|) (* v_main_~x~0_BEFORE_CALL_39 4)))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_37|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_37| |v_main_~#dst~0.base_BEFORE_CALL_37|)) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_39)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_37|) (<= 0 v_main_~x~0_BEFORE_CALL_39) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_37| v_main_~x~0_BEFORE_CALL_39)) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_37| v_main_~x~0_BEFORE_CALL_39)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_37| |#StackHeapBarrier|)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_37|))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:15:25,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:15:25,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:25,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 13, 10] total 79 [2023-04-02 14:15:25,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476031540] [2023-04-02 14:15:25,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:15:25,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-04-02 14:15:25,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-04-02 14:15:25,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1931, Invalid=6256, Unknown=7, NotChecked=178, Total=8372 [2023-04-02 14:15:25,445 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 79 states, 78 states have (on average 1.358974358974359) internal successors, (106), 76 states have internal predecessors, (106), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:15:50,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 14:15:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:50,037 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2023-04-02 14:15:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-04-02 14:15:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.358974358974359) internal successors, (106), 76 states have internal predecessors, (106), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 83 [2023-04-02 14:15:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:50,038 INFO L225 Difference]: With dead ends: 117 [2023-04-02 14:15:50,038 INFO L226 Difference]: Without dead ends: 95 [2023-04-02 14:15:50,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 214 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4978 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=5683, Invalid=18180, Unknown=11, NotChecked=306, Total=24180 [2023-04-02 14:15:50,044 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:50,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 183 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 396 Invalid, 1 Unknown, 171 Unchecked, 2.2s Time] [2023-04-02 14:15:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-02 14:15:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2023-04-02 14:15:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 85 states have internal predecessors, (87), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:15:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2023-04-02 14:15:50,065 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 83 [2023-04-02 14:15:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:50,065 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2023-04-02 14:15:50,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.358974358974359) internal successors, (106), 76 states have internal predecessors, (106), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:15:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2023-04-02 14:15:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-02 14:15:50,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:50,067 INFO L195 NwaCegarLoop]: trace histogram [59, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:50,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 14:15:50,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 14:15:50,269 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:50,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:50,269 INFO L85 PathProgramCache]: Analyzing trace with hash -61519318, now seen corresponding path program 6 times [2023-04-02 14:15:50,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:50,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698630476] [2023-04-02 14:15:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:50,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 4 proven. 1770 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 14:15:52,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:52,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698630476] [2023-04-02 14:15:52,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698630476] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:52,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316872600] [2023-04-02 14:15:52,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:15:52,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:52,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:52,400 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:15:52,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 14:15:52,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:15:52,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:15:52,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 14:15:52,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2023-04-02 14:15:52,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2023-04-02 14:15:53,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316872600] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:53,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213750965] [2023-04-02 14:15:53,087 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 14:15:53,087 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:53,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:53,087 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:53,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:53,103 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:53,398 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:15:53,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:53,440 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:54,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4603#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#dst~0.base_BEFORE_CALL_44| Int) (v_main_~x~0_BEFORE_CALL_50 Int) (|v_main_~#src~0.base_BEFORE_CALL_44| Int)) (and (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_44| |v_main_~#dst~0.base_BEFORE_CALL_44|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_44|) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_44| v_main_~x~0_BEFORE_CALL_50)) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_44|) (* v_main_~x~0_BEFORE_CALL_50 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_44|) (* v_main_~x~0_BEFORE_CALL_50 4)))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_44|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_44|) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_44| |#StackHeapBarrier|)) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_44| v_main_~x~0_BEFORE_CALL_50)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_44| |#StackHeapBarrier|)) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_50)) (<= 0 v_main_~x~0_BEFORE_CALL_50) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_44|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:15:54,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:15:54,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:54,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 8, 8] total 71 [2023-04-02 14:15:54,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350261317] [2023-04-02 14:15:54,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:15:54,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-04-02 14:15:54,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:54,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-04-02 14:15:54,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1977, Invalid=4995, Unknown=0, NotChecked=0, Total=6972 [2023-04-02 14:15:54,730 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 71 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 71 states have internal predecessors, (95), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:15:56,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:56,480 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2023-04-02 14:15:56,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-04-02 14:15:56,481 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 71 states have internal predecessors, (95), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 91 [2023-04-02 14:15:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:56,482 INFO L225 Difference]: With dead ends: 134 [2023-04-02 14:15:56,482 INFO L226 Difference]: Without dead ends: 97 [2023-04-02 14:15:56,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4344 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5877, Invalid=14715, Unknown=0, NotChecked=0, Total=20592 [2023-04-02 14:15:56,485 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:56,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:15:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-04-02 14:15:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-04-02 14:15:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 88 states have internal predecessors, (90), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:15:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2023-04-02 14:15:56,511 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 91 [2023-04-02 14:15:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:56,511 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2023-04-02 14:15:56,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 71 states have internal predecessors, (95), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:15:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2023-04-02 14:15:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-02 14:15:56,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:56,513 INFO L195 NwaCegarLoop]: trace histogram [60, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:56,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-02 14:15:56,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:56,722 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:56,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1882922187, now seen corresponding path program 7 times [2023-04-02 14:15:56,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:56,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038577040] [2023-04-02 14:15:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:56,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1857 backedges. 4 proven. 1830 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 14:15:58,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038577040] [2023-04-02 14:15:58,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038577040] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779349353] [2023-04-02 14:15:58,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:15:58,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:58,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:58,885 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:15:58,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 14:15:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:59,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 62 conjunts are in the unsatisfiable core [2023-04-02 14:15:59,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1857 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 14:15:59,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:16:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1857 backedges. 4 proven. 1830 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 14:16:02,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779349353] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:16:02,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714705539] [2023-04-02 14:16:02,777 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 14:16:02,777 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:16:02,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:16:02,778 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:16:02,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:16:02,786 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:16:03,059 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:16:03,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:16:03,086 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:16:04,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5826#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#dst~0.base_BEFORE_CALL_51| Int) (v_main_~x~0_BEFORE_CALL_57 Int) (|v_main_~#src~0.base_BEFORE_CALL_51| Int)) (and (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_51| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_51|) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_51| v_main_~x~0_BEFORE_CALL_57)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_51| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_51|) (* v_main_~x~0_BEFORE_CALL_57 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_51|) (* v_main_~x~0_BEFORE_CALL_57 4)))) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_51| v_main_~x~0_BEFORE_CALL_57)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_51|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_51| |v_main_~#dst~0.base_BEFORE_CALL_51|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_51|) (<= 0 v_main_~x~0_BEFORE_CALL_57) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_57)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_51|))) (= |#NULL.base| 0))' at error location [2023-04-02 14:16:04,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:16:04,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:16:04,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 125 [2023-04-02 14:16:04,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204945971] [2023-04-02 14:16:04,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:16:04,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-04-02 14:16:04,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:16:04,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-04-02 14:16:04,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7797, Invalid=11109, Unknown=0, NotChecked=0, Total=18906 [2023-04-02 14:16:04,302 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 125 states, 125 states have (on average 1.128) internal successors, (141), 125 states have internal predecessors, (141), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:16:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:16:04,463 INFO L93 Difference]: Finished difference Result 190 states and 255 transitions. [2023-04-02 14:16:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-04-02 14:16:04,463 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.128) internal successors, (141), 125 states have internal predecessors, (141), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 94 [2023-04-02 14:16:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:16:04,464 INFO L225 Difference]: With dead ends: 190 [2023-04-02 14:16:04,464 INFO L226 Difference]: Without dead ends: 159 [2023-04-02 14:16:04,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 203 SyntacticMatches, 5 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3560 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=7797, Invalid=11109, Unknown=0, NotChecked=0, Total=18906 [2023-04-02 14:16:04,466 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:16:04,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:16:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-04-02 14:16:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-04-02 14:16:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 150 states have internal predecessors, (152), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:16:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2023-04-02 14:16:04,501 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 94 [2023-04-02 14:16:04,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:16:04,501 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2023-04-02 14:16:04,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.128) internal successors, (141), 125 states have internal predecessors, (141), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:16:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2023-04-02 14:16:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-02 14:16:04,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:16:04,503 INFO L195 NwaCegarLoop]: trace histogram [122, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:16:04,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:16:04,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:16:04,704 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:16:04,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:16:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash -580271349, now seen corresponding path program 8 times [2023-04-02 14:16:04,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:16:04,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756434986] [2023-04-02 14:16:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:16:04,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:16:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:16:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7530 backedges. 4 proven. 7503 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 14:16:11,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:16:11,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756434986] [2023-04-02 14:16:11,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756434986] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:16:11,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387529030] [2023-04-02 14:16:11,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:16:11,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:16:11,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:16:11,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:16:11,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 14:16:12,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 14:16:12,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:16:12,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-02 14:16:12,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:16:12,142 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 10 treesize of output 8 [2023-04-02 14:16:12,769 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 17 treesize of output 17 [2023-04-02 14:16:14,920 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#dst~0.base_BEFORE_CALL_54| Int) (|v_main_~#src~0.base_BEFORE_CALL_54| Int) (|v_main_~#dst~0.offset_BEFORE_CALL_54| Int)) (and (= (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_54|) 8) (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_54|) (+ |v_main_~#dst~0.offset_BEFORE_CALL_54| 8))) (not (= |v_main_~#src~0.base_BEFORE_CALL_54| |v_main_~#dst~0.base_BEFORE_CALL_54|)))) is different from true [2023-04-02 14:16:17,114 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#dst~0.base_BEFORE_CALL_55| Int) (|v_main_~#src~0.base_BEFORE_CALL_55| Int) (|v_main_~#dst~0.offset_BEFORE_CALL_55| Int)) (and (= (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_55|) (+ |v_main_~#dst~0.offset_BEFORE_CALL_55| 8)) (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_55|) 8)) (not (= |v_main_~#src~0.base_BEFORE_CALL_55| |v_main_~#dst~0.base_BEFORE_CALL_55|)))) is different from true [2023-04-02 14:16:21,456 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 30 treesize of output 10 [2023-04-02 14:16:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7530 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 7503 trivial. 7 not checked. [2023-04-02 14:16:23,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:16:26,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:16:26,077 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 92 treesize of output 88 [2023-04-02 14:16:26,119 INFO L321 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2023-04-02 14:16:26,119 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 34 treesize of output 36 [2023-04-02 14:16:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7530 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 7507 trivial. 0 not checked. [2023-04-02 14:16:26,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387529030] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:16:26,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869012627] [2023-04-02 14:16:26,585 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 14:16:26,585 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:16:26,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:16:26,585 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:16:26,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:16:26,601 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:16:26,910 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:16:26,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:16:26,936 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:16:37,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7562#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#dst~0.base_BEFORE_CALL_62| Int) (v_main_~x~0_BEFORE_CALL_68 Int) (|v_main_~#src~0.base_BEFORE_CALL_62| Int)) (and (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_68)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_62|) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_62| |#StackHeapBarrier|)) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_62| v_main_~x~0_BEFORE_CALL_68)) (<= 0 v_main_~x~0_BEFORE_CALL_68) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_62| v_main_~x~0_BEFORE_CALL_68)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_62|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_62| |v_main_~#dst~0.base_BEFORE_CALL_62|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_62|) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_62|) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_62| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_62|) (* v_main_~x~0_BEFORE_CALL_68 4)) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_62|) (* v_main_~x~0_BEFORE_CALL_68 4)))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:16:37,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:16:37,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:16:37,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 16, 12] total 148 [2023-04-02 14:16:37,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545012142] [2023-04-02 14:16:37,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:16:37,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2023-04-02 14:16:37,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:16:37,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2023-04-02 14:16:37,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7883, Invalid=17239, Unknown=8, NotChecked=630, Total=25760 [2023-04-02 14:16:37,200 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 148 states, 147 states have (on average 1.2312925170068028) internal successors, (181), 145 states have internal predecessors, (181), 7 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:16:46,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 14:17:09,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 14:17:11,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 14:17:13,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 14:17:25,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 14:17:27,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 14:17:29,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 14:17:31,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 14:17:32,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:17:32,086 INFO L93 Difference]: Finished difference Result 246 states and 261 transitions. [2023-04-02 14:17:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2023-04-02 14:17:32,087 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 147 states have (on average 1.2312925170068028) internal successors, (181), 145 states have internal predecessors, (181), 7 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 156 [2023-04-02 14:17:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:17:32,088 INFO L225 Difference]: With dead ends: 246 [2023-04-02 14:17:32,088 INFO L226 Difference]: Without dead ends: 215 [2023-04-02 14:17:32,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 427 SyntacticMatches, 7 SemanticMatches, 298 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 16632 ImplicationChecksByTransitivity, 66.9s TimeCoverageRelationStatistics Valid=24024, Invalid=64473, Unknown=17, NotChecked=1186, Total=89700 [2023-04-02 14:17:32,095 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 20 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 1137 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:17:32,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 174 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 470 Invalid, 8 Unknown, 1137 Unchecked, 16.3s Time] [2023-04-02 14:17:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-04-02 14:17:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2023-04-02 14:17:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 184 states have (on average 1.0271739130434783) internal successors, (189), 187 states have internal predecessors, (189), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 14:17:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 216 transitions. [2023-04-02 14:17:32,160 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 216 transitions. Word has length 156 [2023-04-02 14:17:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:17:32,160 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 216 transitions. [2023-04-02 14:17:32,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 147 states have (on average 1.2312925170068028) internal successors, (181), 145 states have internal predecessors, (181), 7 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:17:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 216 transitions. [2023-04-02 14:17:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-02 14:17:32,163 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:32,163 INFO L195 NwaCegarLoop]: trace histogram [123, 6, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:32,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 14:17:32,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 14:17:32,367 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:32,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash 285303607, now seen corresponding path program 9 times [2023-04-02 14:17:32,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:32,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025395746] [2023-04-02 14:17:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:32,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7671 backedges. 4 proven. 7626 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-02 14:17:39,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:17:39,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025395746] [2023-04-02 14:17:39,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025395746] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:17:39,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199701057] [2023-04-02 14:17:39,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:17:39,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:39,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:17:39,747 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:17:39,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 14:17:40,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:17:40,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:17:40,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 125 conjunts are in the unsatisfiable core [2023-04-02 14:17:40,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:17:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7671 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 14:17:40,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:17:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7671 backedges. 4 proven. 7626 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-02 14:17:55,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199701057] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:17:55,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859502728] [2023-04-02 14:17:55,127 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 14:17:55,127 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:17:55,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:17:55,127 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:17:55,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:17:55,143 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:17:55,417 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:17:55,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:17:55,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:17:57,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9868#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~x~0_BEFORE_CALL_75 Int) (|v_main_~#src~0.base_BEFORE_CALL_69| Int) (|v_main_~#dst~0.base_BEFORE_CALL_69| Int)) (and (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_69| |#StackHeapBarrier|)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_69| |#StackHeapBarrier|)) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_69| v_main_~x~0_BEFORE_CALL_75)) (<= 0 v_main_~x~0_BEFORE_CALL_75) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_69|) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_69|) (<= 1 (+ |#StackHeapBarrier| v_main_~x~0_BEFORE_CALL_75)) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_69|) (* v_main_~x~0_BEFORE_CALL_75 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_69|) (* v_main_~x~0_BEFORE_CALL_75 4)))) (<= 2 (+ |v_main_~#dst~0.base_BEFORE_CALL_69| v_main_~x~0_BEFORE_CALL_75)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_69|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_69| |v_main_~#dst~0.base_BEFORE_CALL_69|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_69|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:17:57,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:17:57,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:17:57,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126, 126] total 251 [2023-04-02 14:17:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401135182] [2023-04-02 14:17:57,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:17:57,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 251 states [2023-04-02 14:17:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:17:57,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 251 interpolants. [2023-04-02 14:17:57,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31422, Invalid=38010, Unknown=0, NotChecked=0, Total=69432 [2023-04-02 14:17:57,832 INFO L87 Difference]: Start difference. First operand 207 states and 216 transitions. Second operand has 251 states, 251 states have (on average 1.0637450199203187) internal successors, (267), 251 states have internal predecessors, (267), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:17:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:17:58,406 INFO L93 Difference]: Finished difference Result 410 states and 552 transitions. [2023-04-02 14:17:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2023-04-02 14:17:58,407 INFO L78 Accepts]: Start accepts. Automaton has has 251 states, 251 states have (on average 1.0637450199203187) internal successors, (267), 251 states have internal predecessors, (267), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 161 [2023-04-02 14:17:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:17:58,408 INFO L225 Difference]: With dead ends: 410 [2023-04-02 14:17:58,408 INFO L226 Difference]: Without dead ends: 332 [2023-04-02 14:17:58,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 339 SyntacticMatches, 7 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7960 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=31422, Invalid=38010, Unknown=0, NotChecked=0, Total=69432 [2023-04-02 14:17:58,413 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:17:58,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:17:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-04-02 14:17:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2023-04-02 14:17:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 309 states have (on average 1.0161812297734627) internal successors, (314), 312 states have internal predecessors, (314), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 14:17:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 341 transitions. [2023-04-02 14:17:58,482 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 341 transitions. Word has length 161 [2023-04-02 14:17:58,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:17:58,482 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 341 transitions. [2023-04-02 14:17:58,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 251 states, 251 states have (on average 1.0637450199203187) internal successors, (267), 251 states have internal predecessors, (267), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:17:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 341 transitions. [2023-04-02 14:17:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-04-02 14:17:58,485 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:58,485 INFO L195 NwaCegarLoop]: trace histogram [248, 6, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:58,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 14:17:58,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 14:17:58,694 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:58,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:58,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1118288919, now seen corresponding path program 10 times [2023-04-02 14:17:58,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:58,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102636208] [2023-04-02 14:17:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:58,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:18:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30921 backedges. 4 proven. 30876 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-02 14:18:27,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:18:27,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102636208] [2023-04-02 14:18:27,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102636208] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:18:27,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748576897] [2023-04-02 14:18:27,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:18:27,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:18:27,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:18:27,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:18:27,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 14:18:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:18:28,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 2395 conjuncts, 250 conjunts are in the unsatisfiable core [2023-04-02 14:18:28,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:18:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30921 backedges. 0 proven. 30876 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 14:18:28,852 INFO L327 TraceCheckSpWp]: Computing backward predicates...