/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 IntervalDomain -i ../sv-benchmarks/c/array-fpi/sina4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:04:14,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:04:14,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:04:14,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:04:14,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:04:14,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:04:14,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:04:14,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:04:14,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:04:14,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:04:14,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:04:14,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:04:14,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:04:14,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:04:14,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:04:14,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:04:14,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:04:14,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:04:14,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:04:14,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:04:14,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:04:14,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:04:14,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:04:14,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:04:14,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:04:14,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:04:14,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:04:14,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:04:14,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:04:14,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:04:14,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:04:14,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:04:14,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:04:14,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:04:14,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:04:14,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:04:14,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:04:14,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:04:14,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:04:14,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:04:14,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:04:14,836 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 [2023-03-31 21:04:14,870 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:04:14,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:04:14,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:04:14,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:04:14,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:04:14,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:04:14,871 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:04:14,872 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:04:14,872 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:04:14,872 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:04:14,872 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:04:14,872 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:04:14,872 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:04:14,873 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:04:14,873 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:04:14,873 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:04:14,873 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:04:14,873 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:04:14,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:04:14,874 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:04:14,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:04:14,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:04:14,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:04:14,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:04:14,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:04:14,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:04:14,875 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:04:14,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:04:14,875 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:04:14,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:04:14,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:04:14,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:04:14,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:04:14,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:04:14,876 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:04:14,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:04:14,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:04:14,876 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:04:14,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:04:14,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:04:14,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:04:14,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:04:15,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:04:15,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:04:15,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:04:15,087 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:04:15,088 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:04:15,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sina4.c [2023-03-31 21:04:16,315 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:04:16,511 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:04:16,512 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina4.c [2023-03-31 21:04:16,517 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68da637b4/87a9dc023c284a2c952190049e4a1293/FLAG6f02d7ae1 [2023-03-31 21:04:16,529 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68da637b4/87a9dc023c284a2c952190049e4a1293 [2023-03-31 21:04:16,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:04:16,532 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:04:16,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:04:16,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:04:16,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:04:16,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5944fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16, skipping insertion in model container [2023-03-31 21:04:16,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:04:16,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:04:16,714 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-fpi/sina4.c[588,601] [2023-03-31 21:04:16,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:04:16,752 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:04:16,767 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-fpi/sina4.c[588,601] [2023-03-31 21:04:16,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:04:16,801 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:04:16,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16 WrapperNode [2023-03-31 21:04:16,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:04:16,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:04:16,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:04:16,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:04:16,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,834 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:04:16,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:04:16,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:04:16,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:04:16,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16" (1/1) ... [2023-03-31 21:04:16,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:04:16,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:16,870 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) [2023-03-31 21:04:16,888 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 [2023-03-31 21:04:16,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:04:16,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:04:16,919 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:04:16,919 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 21:04:16,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 21:04:16,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:04:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:04:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:04:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:04:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:04:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 21:04:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 21:04:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:04:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 21:04:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:04:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 21:04:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 21:04:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:04:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:04:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:04:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:04:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:04:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:04:16,986 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:04:16,988 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:04:17,193 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:04:17,259 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:04:17,259 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-03-31 21:04:17,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:04:17 BoogieIcfgContainer [2023-03-31 21:04:17,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:04:17,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:04:17,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:04:17,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:04:17,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:04:16" (1/3) ... [2023-03-31 21:04:17,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cedef33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:04:17, skipping insertion in model container [2023-03-31 21:04:17,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:04:16" (2/3) ... [2023-03-31 21:04:17,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cedef33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:04:17, skipping insertion in model container [2023-03-31 21:04:17,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:04:17" (3/3) ... [2023-03-31 21:04:17,275 INFO L112 eAbstractionObserver]: Analyzing ICFG sina4.c [2023-03-31 21:04:17,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:04:17,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:04:17,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:04:17,350 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;@16b419c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:04:17,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:04:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 21:04:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 21:04:17,360 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:17,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:17,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:17,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2027176233, now seen corresponding path program 1 times [2023-03-31 21:04:17,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:17,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835851682] [2023-03-31 21:04:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:17,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:17,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:17,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835851682] [2023-03-31 21:04:17,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835851682] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:04:17,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:04:17,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 21:04:17,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490794210] [2023-03-31 21:04:17,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:04:17,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 21:04:17,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:17,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 21:04:17,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 21:04:17,868 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:04:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:17,975 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-03-31 21:04:17,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 21:04:17,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-03-31 21:04:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:17,984 INFO L225 Difference]: With dead ends: 54 [2023-03-31 21:04:17,984 INFO L226 Difference]: Without dead ends: 30 [2023-03-31 21:04:17,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 21:04:17,990 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:17,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 39 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:04:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-31 21:04:18,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-03-31 21:04:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:04:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-03-31 21:04:18,026 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2023-03-31 21:04:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:18,026 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-03-31 21:04:18,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:04:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-03-31 21:04:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 21:04:18,027 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:18,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:18,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:04:18,028 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:18,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash -323741674, now seen corresponding path program 1 times [2023-03-31 21:04:18,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:18,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203253282] [2023-03-31 21:04:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:18,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:19,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:19,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203253282] [2023-03-31 21:04:19,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203253282] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:19,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630069960] [2023-03-31 21:04:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:19,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:19,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:19,600 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) [2023-03-31 21:04:19,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:04:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:19,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 56 conjunts are in the unsatisfiable core [2023-03-31 21:04:19,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:19,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 21:04:19,876 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 [2023-03-31 21:04:19,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-31 21:04:20,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-03-31 21:04:20,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2023-03-31 21:04:20,276 INFO L321 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2023-03-31 21:04:20,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2023-03-31 21:04:20,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:04:20,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 58 [2023-03-31 21:04:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:20,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:22,650 WARN L839 $PredicateComparison]: unable to prove that (forall ((main_~b~0.base Int)) (= (+ c_~N~0 2) (select (let ((.cse0 (* c_main_~i~0 8))) (store (select |c_#memory_int| main_~b~0.base) (+ .cse0 c_main_~b~0.offset) (+ (select (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset .cse0)) 1))) c_main_~b~0.offset))) is different from false [2023-03-31 21:04:22,860 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-03-31 21:04:22,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630069960] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:22,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1768950759] [2023-03-31 21:04:23,004 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 21:04:23,004 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:23,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:23,011 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:23,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:23,086 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:23,239 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-03-31 21:04:23,254 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:23,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:23,270 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:24,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '329#(and (exists ((v_main_~b~0.base_BEFORE_CALL_1 Int)) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_1) 0) (+ 2 ~N~0)))) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:24,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:24,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:24,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 37 [2023-03-31 21:04:24,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459710503] [2023-03-31 21:04:24,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:24,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-03-31 21:04:24,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-03-31 21:04:24,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2289, Unknown=1, NotChecked=98, Total=2652 [2023-03-31 21:04:24,104 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 37 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 21:04:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:24,789 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-03-31 21:04:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-31 21:04:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2023-03-31 21:04:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:24,807 INFO L225 Difference]: With dead ends: 48 [2023-03-31 21:04:24,807 INFO L226 Difference]: Without dead ends: 46 [2023-03-31 21:04:24,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=345, Invalid=2964, Unknown=1, NotChecked=112, Total=3422 [2023-03-31 21:04:24,809 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 66 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:24,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 108 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 442 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2023-03-31 21:04:24,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-31 21:04:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2023-03-31 21:04:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 32 states have internal predecessors, (41), 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) [2023-03-31 21:04:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-03-31 21:04:24,838 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 23 [2023-03-31 21:04:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:24,838 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-03-31 21:04:24,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 21:04:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-03-31 21:04:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 21:04:24,839 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:24,839 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:24,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:04:25,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:25,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:25,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash 743504784, now seen corresponding path program 2 times [2023-03-31 21:04:25,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:25,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137238392] [2023-03-31 21:04:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:25,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 21:04:25,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:25,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137238392] [2023-03-31 21:04:25,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137238392] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:25,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479038534] [2023-03-31 21:04:25,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:04:25,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:25,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:25,142 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) [2023-03-31 21:04:25,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:04:25,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 21:04:25,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:04:25,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:04:25,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 21:04:25,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 21:04:25,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479038534] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:25,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [441667066] [2023-03-31 21:04:25,297 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 21:04:25,297 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:25,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:25,298 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:25,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:25,341 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:25,483 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-03-31 21:04:25,493 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:25,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:25,507 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:25,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '659#(and (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0.base_BEFORE_CALL_2 Int)) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_2) 0) (+ 2 ~N~0)))) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:25,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:25,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:25,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-03-31 21:04:25,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476148151] [2023-03-31 21:04:25,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:25,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 21:04:25,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:25,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 21:04:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-03-31 21:04:25,994 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:04:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:26,207 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-03-31 21:04:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 21:04:26,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-03-31 21:04:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:26,209 INFO L225 Difference]: With dead ends: 73 [2023-03-31 21:04:26,209 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 21:04:26,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-03-31 21:04:26,211 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:26,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 74 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:04:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 21:04:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2023-03-31 21:04:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 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) [2023-03-31 21:04:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-03-31 21:04:26,226 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 24 [2023-03-31 21:04:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:26,226 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-03-31 21:04:26,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:04:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-03-31 21:04:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 21:04:26,227 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:26,227 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:26,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:04:26,440 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,SelfDestructingSolverStorable2 [2023-03-31 21:04:26,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:26,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:26,440 INFO L85 PathProgramCache]: Analyzing trace with hash 476440108, now seen corresponding path program 3 times [2023-03-31 21:04:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:26,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473353805] [2023-03-31 21:04:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:26,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 21:04:26,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473353805] [2023-03-31 21:04:26,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473353805] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33722999] [2023-03-31 21:04:26,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:04:26,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:26,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:26,515 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) [2023-03-31 21:04:26,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:04:26,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:04:26,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:04:26,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:04:26,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 21:04:26,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 21:04:26,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33722999] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:26,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2090427757] [2023-03-31 21:04:26,644 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 21:04:26,644 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:26,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:26,645 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:26,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:26,682 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:26,819 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-03-31 21:04:26,836 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:26,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:26,851 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:27,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1028#(and (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((v_main_~b~0.base_BEFORE_CALL_3 Int)) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_3) 0) (+ 2 ~N~0)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:27,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:27,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:27,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-03-31 21:04:27,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336657952] [2023-03-31 21:04:27,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:27,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 21:04:27,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 21:04:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-03-31 21:04:27,315 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:04:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:27,445 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2023-03-31 21:04:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:04:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-03-31 21:04:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:27,447 INFO L225 Difference]: With dead ends: 67 [2023-03-31 21:04:27,448 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 21:04:27,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2023-03-31 21:04:27,452 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:27,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:04:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 21:04:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2023-03-31 21:04:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:04:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-03-31 21:04:27,480 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2023-03-31 21:04:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:27,480 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-03-31 21:04:27,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:04:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-03-31 21:04:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 21:04:27,481 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:27,482 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:27,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 21:04:27,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:27,687 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:27,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash 396050231, now seen corresponding path program 4 times [2023-03-31 21:04:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:27,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583226556] [2023-03-31 21:04:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:27,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:29,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:29,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583226556] [2023-03-31 21:04:29,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583226556] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:29,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835764681] [2023-03-31 21:04:29,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 21:04:29,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:29,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:29,041 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) [2023-03-31 21:04:29,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 21:04:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:29,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 75 conjunts are in the unsatisfiable core [2023-03-31 21:04:29,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:29,170 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 [2023-03-31 21:04:29,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 21:04:29,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-31 21:04:29,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-03-31 21:04:29,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-31 21:04:29,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-31 21:04:29,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-31 21:04:29,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-31 21:04:29,761 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2023-03-31 21:04:29,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 40 [2023-03-31 21:04:29,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:29,904 INFO L321 Elim1Store]: treesize reduction 51, result has 25.0 percent of original size [2023-03-31 21:04:29,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2023-03-31 21:04:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:30,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:48,092 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:48,095 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:04:48,099 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-03-31 21:04:48,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 1 [2023-03-31 21:04:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:48,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835764681] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:48,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1288603122] [2023-03-31 21:04:48,123 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 21:04:48,123 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:48,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:48,124 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:48,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:48,175 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:48,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-03-31 21:04:48,277 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:48,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:48,289 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:49,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1416#(and (exists ((v_main_~b~0.base_BEFORE_CALL_4 Int)) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_4) 0) (+ 2 ~N~0)))) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:49,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:49,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:49,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 18] total 48 [2023-03-31 21:04:49,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638705959] [2023-03-31 21:04:49,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:49,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-03-31 21:04:49,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-03-31 21:04:49,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=3643, Unknown=3, NotChecked=0, Total=3906 [2023-03-31 21:04:49,244 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 48 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:04:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:52,382 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-03-31 21:04:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-03-31 21:04:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-03-31 21:04:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:52,385 INFO L225 Difference]: With dead ends: 61 [2023-03-31 21:04:52,385 INFO L226 Difference]: Without dead ends: 59 [2023-03-31 21:04:52,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=454, Invalid=6023, Unknown=3, NotChecked=0, Total=6480 [2023-03-31 21:04:52,393 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:52,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 181 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 21:04:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-03-31 21:04:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2023-03-31 21:04:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 43 states have internal predecessors, (54), 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) [2023-03-31 21:04:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2023-03-31 21:04:52,423 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2023-03-31 21:04:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:52,423 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2023-03-31 21:04:52,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:04:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2023-03-31 21:04:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 21:04:52,424 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:52,424 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:52,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 21:04:52,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:52,631 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:52,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:52,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1362766415, now seen corresponding path program 5 times [2023-03-31 21:04:52,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:52,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889343632] [2023-03-31 21:04:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:52,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:04:52,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:52,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889343632] [2023-03-31 21:04:52,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889343632] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:52,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074960953] [2023-03-31 21:04:52,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:04:52,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:52,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:52,773 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) [2023-03-31 21:04:52,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 21:04:52,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 21:04:52,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:04:52,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 21:04:52,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:04:52,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:04:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:04:52,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074960953] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:04:52,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140893904] [2023-03-31 21:04:52,976 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 21:04:52,976 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:04:52,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:04:52,976 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:04:52,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:04:53,021 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:04:53,111 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-03-31 21:04:53,119 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:04:53,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:04:53,129 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:04:53,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1841#(and (<= ~N~0 2147483647) (exists ((v_main_~b~0.base_BEFORE_CALL_5 Int)) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_5) 0) (+ 2 ~N~0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< 0 ~N~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:04:53,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:04:53,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:04:53,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-03-31 21:04:53,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127693117] [2023-03-31 21:04:53,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:04:53,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 21:04:53,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:04:53,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 21:04:53,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2023-03-31 21:04:53,554 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:04:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:04:53,843 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2023-03-31 21:04:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 21:04:53,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-03-31 21:04:53,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:04:53,845 INFO L225 Difference]: With dead ends: 110 [2023-03-31 21:04:53,845 INFO L226 Difference]: Without dead ends: 86 [2023-03-31 21:04:53,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 21:04:53,847 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:04:53,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 149 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:04:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-03-31 21:04:53,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2023-03-31 21:04:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 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) [2023-03-31 21:04:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2023-03-31 21:04:53,871 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 28 [2023-03-31 21:04:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:04:53,871 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2023-03-31 21:04:53,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:04:53,871 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2023-03-31 21:04:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 21:04:53,872 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:04:53,872 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:04:53,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 21:04:54,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:54,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:04:54,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:04:54,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1986497334, now seen corresponding path program 6 times [2023-03-31 21:04:54,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:04:54,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002926802] [2023-03-31 21:04:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:04:54,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:04:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:04:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:55,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:04:55,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002926802] [2023-03-31 21:04:55,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002926802] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:04:55,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739324294] [2023-03-31 21:04:55,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:04:55,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:04:55,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:04:55,973 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) [2023-03-31 21:04:55,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 21:04:56,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:04:56,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:04:56,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 91 conjunts are in the unsatisfiable core [2023-03-31 21:04:56,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:04:56,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 21:04:56,090 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 [2023-03-31 21:04:56,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-03-31 21:04:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:56,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2023-03-31 21:04:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:56,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:56,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2023-03-31 21:04:56,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-03-31 21:04:56,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-03-31 21:04:56,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-03-31 21:04:56,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-03-31 21:04:56,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-03-31 21:04:56,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-03-31 21:04:56,798 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2023-03-31 21:04:56,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 40 [2023-03-31 21:04:56,921 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2023-03-31 21:04:56,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 52 [2023-03-31 21:04:57,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:04:57,034 INFO L321 Elim1Store]: treesize reduction 51, result has 25.0 percent of original size [2023-03-31 21:04:57,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2023-03-31 21:04:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:04:57,274 INFO L327 TraceCheckSpWp]: Computing backward predicates...