/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:16:07,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:16:07,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:16:07,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:16:07,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:16:07,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:16:07,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:16:07,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:16:07,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:16:07,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:16:07,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:16:07,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:16:07,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:16:07,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:16:07,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:16:07,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:16:07,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:16:07,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:16:07,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:16:07,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:16:07,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:16:07,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:16:07,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:16:07,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:16:07,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 15:16:07,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:16:07,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:16:07,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:16:07,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:16:07,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:16:07,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:16:07,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:16:07,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:16:07,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:16:07,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:16:07,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:16:07,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 15:16:07,916 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:16:07,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:16:07,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:16:07,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:16:07,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:16:07,918 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:16:07,918 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:16:07,918 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:16:07,918 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:16:07,918 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:16:07,919 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:16:07,919 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:16:07,919 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:16:07,919 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:16:07,919 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:16:07,919 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:16:07,919 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:16:07,920 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:16:07,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:16:07,920 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:16:07,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:16:07,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:16:07,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:16:07,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:16:07,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:16:07,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:16:07,921 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:16:07,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:16:07,921 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:16:07,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:16:07,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:16:07,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:16:07,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:16:07,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:16:07,922 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:16:07,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:16:07,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:16:07,922 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:16:07,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:16:07,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:16:07,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:16:07,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:16:08,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:16:08,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:16:08,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:16:08,174 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:16:08,174 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:16:08,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2023-04-02 15:16:09,341 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:16:09,505 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:16:09,506 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2023-04-02 15:16:09,510 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2f28a213/e3779bb9c82d412d8d08066bd2885da3/FLAGfef673b45 [2023-04-02 15:16:09,521 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2f28a213/e3779bb9c82d412d8d08066bd2885da3 [2023-04-02 15:16:09,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:16:09,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:16:09,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:16:09,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:16:09,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:16:09,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c4de44c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09, skipping insertion in model container [2023-04-02 15:16:09,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:16:09,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:16:09,655 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-cav19/array_init_pair_symmetr2.c[415,428] [2023-04-02 15:16:09,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:16:09,675 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:16:09,684 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-cav19/array_init_pair_symmetr2.c[415,428] [2023-04-02 15:16:09,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:16:09,701 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:16:09,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09 WrapperNode [2023-04-02 15:16:09,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:16:09,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:16:09,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:16:09,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:16:09,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,723 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:16:09,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:16:09,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:16:09,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:16:09,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09" (1/1) ... [2023-04-02 15:16:09,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:16:09,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:16:09,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 15:16:09,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 15:16:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:16:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:16:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:16:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 15:16:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:16:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:16:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:16:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:16:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:16:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:16:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 15:16:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:16:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:16:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:16:09,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 15:16:09,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:16:09,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:16:09,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:16:09,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:16:09,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:16:09,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:16:09,848 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:16:09,850 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:16:10,057 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:16:10,084 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:16:10,085 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 15:16:10,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:16:10 BoogieIcfgContainer [2023-04-02 15:16:10,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:16:10,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:16:10,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:16:10,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:16:10,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:16:09" (1/3) ... [2023-04-02 15:16:10,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317551a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:16:10, skipping insertion in model container [2023-04-02 15:16:10,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:16:09" (2/3) ... [2023-04-02 15:16:10,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@317551a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:16:10, skipping insertion in model container [2023-04-02 15:16:10,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:16:10" (3/3) ... [2023-04-02 15:16:10,094 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2023-04-02 15:16:10,108 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:16:10,108 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:16:10,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:16:10,149 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;@45fb121, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:16:10,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:16:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:16:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 15:16:10,157 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:16:10,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:16:10,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:16:10,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:16:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1196746822, now seen corresponding path program 1 times [2023-04-02 15:16:10,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:16:10,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229196609] [2023-04-02 15:16:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:16:10,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:16:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:16:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:16:10,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:16:10,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229196609] [2023-04-02 15:16:10,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229196609] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:16:10,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:16:10,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 15:16:10,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914611098] [2023-04-02 15:16:10,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:16:10,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 15:16:10,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:16:10,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 15:16:10,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:16:10,595 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:16:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:16:10,700 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2023-04-02 15:16:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 15:16:10,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 15:16:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:16:10,709 INFO L225 Difference]: With dead ends: 44 [2023-04-02 15:16:10,709 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 15:16:10,711 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 [2023-04-02 15:16:10,714 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:16:10,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:16:10,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 15:16:10,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-04-02 15:16:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 15:16:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-04-02 15:16:10,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2023-04-02 15:16:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:16:10,761 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-04-02 15:16:10,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 15:16:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-04-02 15:16:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 15:16:10,762 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:16:10,762 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:16:10,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 15:16:10,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:16:10,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:16:10,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1815884035, now seen corresponding path program 1 times [2023-04-02 15:16:10,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:16:10,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984393771] [2023-04-02 15:16:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:16:10,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:16:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:16:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 15:16:10,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:16:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984393771] [2023-04-02 15:16:10,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984393771] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:16:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900823558] [2023-04-02 15:16:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:16:10,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:16:10,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:16:10,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:16:10,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:16:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:16:11,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:16:11,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:16:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 15:16:11,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:16:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 15:16:11,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900823558] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:16:11,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095092135] [2023-04-02 15:16:11,288 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 15:16:11,288 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:16:11,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:16:11,295 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:16:11,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:16:11,379 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 15:16:12,455 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 15:16:12,472 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2023-04-02 15:16:12,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:16:12,482 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:16:13,403 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '288#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#c~0.base_BEFORE_CALL_22| Int)) (and (<= 2 |v_main_~#c~0.base_BEFORE_CALL_22|) (<= (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_22|) 4) 0) (<= 3 (+ |#StackHeapBarrier| |v_main_~#c~0.base_BEFORE_CALL_22|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_22|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-02 15:16:13,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:16:13,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:16:13,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-04-02 15:16:13,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317155547] [2023-04-02 15:16:13,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:16:13,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 15:16:13,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:16:13,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 15:16:13,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-04-02 15:16:13,409 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-02 15:16:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:16:13,584 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2023-04-02 15:16:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 15:16:13,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 24 [2023-04-02 15:16:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:16:13,587 INFO L225 Difference]: With dead ends: 60 [2023-04-02 15:16:13,587 INFO L226 Difference]: Without dead ends: 49 [2023-04-02 15:16:13,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2023-04-02 15:16:13,590 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:16:13,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 37 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:16:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-02 15:16:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2023-04-02 15:16:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 15 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 15:16:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2023-04-02 15:16:13,611 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 24 [2023-04-02 15:16:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:16:13,612 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2023-04-02 15:16:13,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-02 15:16:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2023-04-02 15:16:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 15:16:13,614 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:16:13,615 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:16:13,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 15:16:13,820 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 [2023-04-02 15:16:13,821 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:16:13,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:16:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1897663622, now seen corresponding path program 2 times [2023-04-02 15:16:13,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:16:13,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861202908] [2023-04-02 15:16:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:16:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:16:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:16:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-04-02 15:16:14,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:16:14,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861202908] [2023-04-02 15:16:14,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861202908] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:16:14,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797870960] [2023-04-02 15:16:14,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:16:14,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:16:14,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:16:14,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:16:14,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 15:16:14,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 15:16:14,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:16:14,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 15:16:14,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:16:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-04-02 15:16:14,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:16:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-04-02 15:16:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797870960] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:16:14,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998054734] [2023-04-02 15:16:14,541 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 15:16:14,541 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:16:14,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:16:14,543 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:16:14,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:16:14,564 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 15:16:15,205 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 15:16:15,218 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2023-04-02 15:16:15,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:16:15,223 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:16:16,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '855#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#c~0.base_BEFORE_CALL_44| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#c~0.base_BEFORE_CALL_44|)) (<= (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_44|) 4) 0) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_44|) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_44|))) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-02 15:16:16,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:16:16,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:16:16,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-04-02 15:16:16,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570333682] [2023-04-02 15:16:16,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:16:16,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 15:16:16,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:16:16,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 15:16:16,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 15:16:16,043 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2023-04-02 15:16:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:16:16,367 INFO L93 Difference]: Finished difference Result 117 states and 169 transitions. [2023-04-02 15:16:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 15:16:16,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 60 [2023-04-02 15:16:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:16:16,369 INFO L225 Difference]: With dead ends: 117 [2023-04-02 15:16:16,369 INFO L226 Difference]: Without dead ends: 103 [2023-04-02 15:16:16,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 15:16:16,371 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:16:16,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 38 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:16:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-04-02 15:16:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 78. [2023-04-02 15:16:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 33 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-02 15:16:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2023-04-02 15:16:16,388 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 60 [2023-04-02 15:16:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:16:16,389 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2023-04-02 15:16:16,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 8 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2023-04-02 15:16:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2023-04-02 15:16:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-02 15:16:16,392 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:16:16,393 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:16:16,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 15:16:16,599 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 [2023-04-02 15:16:16,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:16:16,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:16:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash -443025690, now seen corresponding path program 3 times [2023-04-02 15:16:16,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:16:16,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981464618] [2023-04-02 15:16:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:16:16,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:16:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:16:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2023-04-02 15:16:17,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:16:17,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981464618] [2023-04-02 15:16:17,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981464618] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:16:17,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792203436] [2023-04-02 15:16:17,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:16:17,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:16:17,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:16:17,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:16:17,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 15:16:18,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:16:18,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:16:18,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 15:16:18,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:16:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2023-04-02 15:16:19,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:16:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2023-04-02 15:16:19,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792203436] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:16:19,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996813389] [2023-04-02 15:16:19,656 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 15:16:19,656 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:16:19,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:16:19,656 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:16:19,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:16:19,674 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 15:16:20,259 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 15:16:20,268 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2023-04-02 15:16:20,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:16:20,272 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:16:20,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2046#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#c~0.base_BEFORE_CALL_66| Int)) (and (<= (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_66|) 4) 0) (<= 3 (+ |#StackHeapBarrier| |v_main_~#c~0.base_BEFORE_CALL_66|)) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_66|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_66|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-02 15:16:20,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:16:20,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:16:20,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2023-04-02 15:16:20,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238052837] [2023-04-02 15:16:20,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:16:20,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-02 15:16:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:16:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-02 15:16:20,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=1920, Unknown=0, NotChecked=0, Total=2652 [2023-04-02 15:16:20,983 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (94), 4 states have call predecessors, (94), 3 states have return successors, (92), 32 states have call predecessors, (92), 31 states have call successors, (92) [2023-04-02 15:16:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:16:21,710 INFO L93 Difference]: Finished difference Result 231 states and 343 transitions. [2023-04-02 15:16:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 15:16:21,710 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (94), 4 states have call predecessors, (94), 3 states have return successors, (92), 32 states have call predecessors, (92), 31 states have call successors, (92) Word has length 132 [2023-04-02 15:16:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:16:21,713 INFO L225 Difference]: With dead ends: 231 [2023-04-02 15:16:21,713 INFO L226 Difference]: Without dead ends: 211 [2023-04-02 15:16:21,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1055, Invalid=2851, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 15:16:21,716 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 192 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:16:21,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 32 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:16:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-04-02 15:16:21,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 150. [2023-04-02 15:16:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 69 states have call successors, (69), 4 states have call predecessors, (69), 3 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-04-02 15:16:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2023-04-02 15:16:21,741 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 132 [2023-04-02 15:16:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:16:21,742 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2023-04-02 15:16:21,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (94), 4 states have call predecessors, (94), 3 states have return successors, (92), 32 states have call predecessors, (92), 31 states have call successors, (92) [2023-04-02 15:16:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2023-04-02 15:16:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-04-02 15:16:21,747 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:16:21,747 INFO L195 NwaCegarLoop]: trace histogram [66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:16:21,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:16:21,957 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 [2023-04-02 15:16:21,958 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:16:21,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:16:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1171608486, now seen corresponding path program 4 times [2023-04-02 15:16:21,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:16:21,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332876750] [2023-04-02 15:16:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:16:21,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:16:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:16:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2023-04-02 15:16:23,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:16:23,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332876750] [2023-04-02 15:16:23,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332876750] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:16:23,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281240906] [2023-04-02 15:16:23,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:16:23,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:16:23,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:16:23,333 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:16:23,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 15:16:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:16:23,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 15:16:23,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:16:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2023-04-02 15:16:24,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:16:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2023-04-02 15:16:25,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281240906] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:16:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052422982] [2023-04-02 15:16:25,312 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 15:16:25,312 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:16:25,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:16:25,312 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:16:25,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:16:25,333 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 15:16:25,890 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 15:16:25,898 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2023-04-02 15:16:25,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:16:25,902 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:16:26,728 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4485#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#c~0.base_BEFORE_CALL_88| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_88|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#c~0.base_BEFORE_CALL_88|)) (<= (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_88|) 4) 0) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_88|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-02 15:16:26,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:16:26,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:16:26,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 73 [2023-04-02 15:16:26,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983016867] [2023-04-02 15:16:26,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:16:26,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-04-02 15:16:26,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:16:26,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-04-02 15:16:26,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2532, Invalid=5124, Unknown=0, NotChecked=0, Total=7656 [2023-04-02 15:16:26,736 INFO L87 Difference]: Start difference. First operand 150 states and 217 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 70 states have call successors, (202), 4 states have call predecessors, (202), 3 states have return successors, (200), 68 states have call predecessors, (200), 67 states have call successors, (200) [2023-04-02 15:16:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:16:28,592 INFO L93 Difference]: Finished difference Result 459 states and 691 transitions. [2023-04-02 15:16:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 15:16:28,593 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 70 states have call successors, (202), 4 states have call predecessors, (202), 3 states have return successors, (200), 68 states have call predecessors, (200), 67 states have call successors, (200) Word has length 276 [2023-04-02 15:16:28,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:16:28,597 INFO L225 Difference]: With dead ends: 459 [2023-04-02 15:16:28,597 INFO L226 Difference]: Without dead ends: 427 [2023-04-02 15:16:28,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 767 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5311 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3755, Invalid=8455, Unknown=0, NotChecked=0, Total=12210 [2023-04-02 15:16:28,601 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 537 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 15:16:28,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 37 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 15:16:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2023-04-02 15:16:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 294. [2023-04-02 15:16:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 141 states have call successors, (141), 4 states have call predecessors, (141), 3 states have return successors, (140), 140 states have call predecessors, (140), 140 states have call successors, (140) [2023-04-02 15:16:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 433 transitions. [2023-04-02 15:16:28,650 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 433 transitions. Word has length 276 [2023-04-02 15:16:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:16:28,651 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 433 transitions. [2023-04-02 15:16:28,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 70 states have call successors, (202), 4 states have call predecessors, (202), 3 states have return successors, (200), 68 states have call predecessors, (200), 67 states have call successors, (200) [2023-04-02 15:16:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 433 transitions. [2023-04-02 15:16:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2023-04-02 15:16:28,662 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:16:28,662 INFO L195 NwaCegarLoop]: trace histogram [138, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:16:28,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 15:16:28,869 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 [2023-04-02 15:16:28,870 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:16:28,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:16:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash -114414298, now seen corresponding path program 5 times [2023-04-02 15:16:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:16:28,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477466416] [2023-04-02 15:16:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:16:28,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:16:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:16:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 19987 trivial. 0 not checked. [2023-04-02 15:16:33,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:16:33,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477466416] [2023-04-02 15:16:33,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477466416] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:16:33,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837840978] [2023-04-02 15:16:33,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:16:33,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:16:33,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:16:33,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:16:33,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 15:18:06,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-02 15:18:06,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:18:07,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 15:18:07,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:18:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 24127 trivial. 0 not checked. [2023-04-02 15:18:08,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:18:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 24127 trivial. 0 not checked. [2023-04-02 15:18:11,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837840978] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:18:11,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851309496] [2023-04-02 15:18:11,638 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 15:18:11,638 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:18:11,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:18:11,639 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:18:11,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:18:11,664 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 15:18:12,148 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 15:18:12,160 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 12 for LOIs [2023-04-02 15:18:12,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:18:12,165 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:18:13,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9420#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#c~0.base_BEFORE_CALL_110| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_110|) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_110|) (<= (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_110|) 4) 0) (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_110| |#StackHeapBarrier|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-02 15:18:13,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:18:13,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:18:13,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 145 [2023-04-02 15:18:13,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566504114] [2023-04-02 15:18:13,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:18:13,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2023-04-02 15:18:13,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:18:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2023-04-02 15:18:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9588, Invalid=15852, Unknown=0, NotChecked=0, Total=25440 [2023-04-02 15:18:13,154 INFO L87 Difference]: Start difference. First operand 294 states and 433 transitions. Second operand has 145 states, 145 states have (on average 1.4206896551724137) internal successors, (206), 145 states have internal predecessors, (206), 50 states have call successors, (148), 4 states have call predecessors, (148), 3 states have return successors, (146), 48 states have call predecessors, (146), 49 states have call successors, (146) [2023-04-02 15:18:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:18:20,470 INFO L93 Difference]: Finished difference Result 915 states and 1387 transitions. [2023-04-02 15:18:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-02 15:18:20,471 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.4206896551724137) internal successors, (206), 145 states have internal predecessors, (206), 50 states have call successors, (148), 4 states have call predecessors, (148), 3 states have return successors, (146), 48 states have call predecessors, (146), 49 states have call successors, (146) Word has length 564 [2023-04-02 15:18:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:18:20,477 INFO L225 Difference]: With dead ends: 915 [2023-04-02 15:18:20,477 INFO L226 Difference]: Without dead ends: 859 [2023-04-02 15:18:20,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1788 GetRequests, 1583 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17599 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=14339, Invalid=28303, Unknown=0, NotChecked=0, Total=42642 [2023-04-02 15:18:20,482 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 889 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 1961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 3102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1961 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 15:18:20,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 80 Invalid, 3102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1961 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 15:18:20,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2023-04-02 15:18:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 582. [2023-04-02 15:18:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 293 states have (on average 1.0102389078498293) internal successors, (296), 293 states have internal predecessors, (296), 285 states have call successors, (285), 4 states have call predecessors, (285), 3 states have return successors, (284), 284 states have call predecessors, (284), 284 states have call successors, (284) [2023-04-02 15:18:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 865 transitions. [2023-04-02 15:18:20,573 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 865 transitions. Word has length 564 [2023-04-02 15:18:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:18:20,574 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 865 transitions. [2023-04-02 15:18:20,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.4206896551724137) internal successors, (206), 145 states have internal predecessors, (206), 50 states have call successors, (148), 4 states have call predecessors, (148), 3 states have return successors, (146), 48 states have call predecessors, (146), 49 states have call successors, (146) [2023-04-02 15:18:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 865 transitions. [2023-04-02 15:18:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2023-04-02 15:18:20,621 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:18:20,622 INFO L195 NwaCegarLoop]: trace histogram [282, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:18:20,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 15:18:20,849 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 [2023-04-02 15:18:20,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:18:20,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:18:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1167613990, now seen corresponding path program 6 times [2023-04-02 15:18:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:18:20,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516378517] [2023-04-02 15:18:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:18:20,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:18:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 105656 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 83707 trivial. 0 not checked. [2023-04-02 15:18:35,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:18:35,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516378517] [2023-04-02 15:18:35,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516378517] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:18:35,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982573168] [2023-04-02 15:18:35,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:18:35,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:18:35,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:18:35,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:18:35,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process