/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-industry-pattern/array_of_struct_break.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:20:24,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:20:24,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:20:24,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:20:24,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:20:24,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:20:24,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:20:24,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:20:24,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:20:24,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:20:24,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:20:24,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:20:24,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:20:24,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:20:24,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:20:24,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:20:24,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:20:24,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:20:24,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:20:24,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:20:24,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:20:24,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:20:24,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:20:24,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:20:24,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:20:24,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:20:24,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:20:24,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:20:24,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:20:24,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:20:24,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:20:24,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:20:24,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:20:24,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:20:24,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:20:24,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:20:24,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:20:24,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:20:24,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:20:24,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:20:24,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:20:24,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:20:24,449 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:20:24,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:20:24,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:20:24,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:20:24,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:20:24,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:20:24,451 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:20:24,451 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:20:24,451 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:20:24,451 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:20:24,451 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:20:24,451 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:20:24,451 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:20:24,451 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:20:24,452 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:20:24,452 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:20:24,452 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:20:24,452 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:20:24,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:20:24,453 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:20:24,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:20:24,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:20:24,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:20:24,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:20:24,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:20:24,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:20:24,454 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:20:24,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:20:24,454 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:20:24,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:20:24,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:20:24,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:20:24,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:20:24,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:20:24,455 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:20:24,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:20:24,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:20:24,455 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:20:24,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:20:24,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:20:24,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:20:24,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:20:24,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:20:24,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:20:24,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:20:24,697 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:20:24,698 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:20:24,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i [2023-04-02 14:20:25,843 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:20:26,026 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:20:26,026 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_break.i [2023-04-02 14:20:26,035 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27892084f/8c2d5f6fe5e5447e9c7a7ef65179be9c/FLAGfb746b24d [2023-04-02 14:20:26,057 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27892084f/8c2d5f6fe5e5447e9c7a7ef65179be9c [2023-04-02 14:20:26,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:20:26,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:20:26,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:20:26,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:20:26,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:20:26,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:20:26" (1/1) ... [2023-04-02 14:20:26,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71774a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:26, skipping insertion in model container [2023-04-02 14:20:26,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:20:26" (1/1) ... [2023-04-02 14:20:26,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:20:26,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:20:26,207 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-industry-pattern/array_of_struct_break.i[854,867] [2023-04-02 14:20:26,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:20:27,121 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:20:27,134 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-industry-pattern/array_of_struct_break.i[854,867] [2023-04-02 14:20:27,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:20:27,152 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:20:27,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27 WrapperNode [2023-04-02 14:20:27,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:20:27,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:20:27,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:20:27,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:20:27,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27" (1/1) ... [2023-04-02 14:20:27,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27" (1/1) ... [2023-04-02 14:20:27,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27" (1/1) ... [2023-04-02 14:20:27,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27" (1/1) ... [2023-04-02 14:20:27,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27" (1/1) ... [2023-04-02 14:20:27,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27" (1/1) ... [2023-04-02 14:20:27,180 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27" (1/1) ... [2023-04-02 14:20:27,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27" (1/1) ... [2023-04-02 14:20:27,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:20:27,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:20:27,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:20:27,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:20:27,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27" (1/1) ... [2023-04-02 14:20:27,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:20:27,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:27,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:20:27,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:20:27,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:20:27,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:20:27,249 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:20:27,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:20:27,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:20:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:20:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:20:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:20:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:20:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:20:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:20:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:20:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:20:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:20:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:20:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:20:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:20:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:20:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:20:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:20:27,329 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:20:27,331 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:20:27,556 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:20:27,598 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:20:27,598 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 14:20:27,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:20:27 BoogieIcfgContainer [2023-04-02 14:20:27,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:20:27,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:20:27,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:20:27,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:20:27,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:20:26" (1/3) ... [2023-04-02 14:20:27,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756ca63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:20:27, skipping insertion in model container [2023-04-02 14:20:27,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:27" (2/3) ... [2023-04-02 14:20:27,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756ca63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:20:27, skipping insertion in model container [2023-04-02 14:20:27,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:20:27" (3/3) ... [2023-04-02 14:20:27,610 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_break.i [2023-04-02 14:20:27,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:20:27,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:20:27,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:20:27,691 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;@1ceec58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:20:27,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:20:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:20:27,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 14:20:27,704 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:27,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:27,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:27,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1797247767, now seen corresponding path program 1 times [2023-04-02 14:20:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:27,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706598763] [2023-04-02 14:20:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:27,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:27,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:27,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706598763] [2023-04-02 14:20:27,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706598763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:20:27,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:20:27,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:20:27,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757558181] [2023-04-02 14:20:27,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:20:27,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:20:27,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:27,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:20:27,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:20:27,989 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:28,061 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-04-02 14:20:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:20:28,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 14:20:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:28,070 INFO L225 Difference]: With dead ends: 45 [2023-04-02 14:20:28,070 INFO L226 Difference]: Without dead ends: 27 [2023-04-02 14:20:28,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:20:28,075 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:28,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:20:28,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-02 14:20:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-04-02 14:20:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:20:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-04-02 14:20:28,105 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2023-04-02 14:20:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:28,106 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-04-02 14:20:28,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:28,106 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-04-02 14:20:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 14:20:28,107 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:28,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:28,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:20:28,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:28,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash -293571886, now seen corresponding path program 1 times [2023-04-02 14:20:28,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:28,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367144309] [2023-04-02 14:20:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:28,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:28,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:28,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367144309] [2023-04-02 14:20:28,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367144309] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:20:28,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:20:28,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:20:28,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369382205] [2023-04-02 14:20:28,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:20:28,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:20:28,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:28,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:20:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:20:28,154 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:28,169 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-04-02 14:20:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:20:28,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 14:20:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:28,170 INFO L225 Difference]: With dead ends: 35 [2023-04-02 14:20:28,170 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 14:20:28,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:20:28,172 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:28,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:20:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 14:20:28,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-02 14:20:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:20:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-02 14:20:28,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2023-04-02 14:20:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:28,177 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-02 14:20:28,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-02 14:20:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 14:20:28,178 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:28,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:28,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 14:20:28,178 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:28,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:28,179 INFO L85 PathProgramCache]: Analyzing trace with hash -195052990, now seen corresponding path program 1 times [2023-04-02 14:20:28,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:28,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071401947] [2023-04-02 14:20:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:28,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:28,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:28,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071401947] [2023-04-02 14:20:28,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071401947] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:20:28,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730780768] [2023-04-02 14:20:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:28,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:28,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:28,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:20:28,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:20:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:28,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:20:28,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:20:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:28,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:20:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:28,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730780768] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:20:28,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413918046] [2023-04-02 14:20:28,460 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:20:28,460 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:20:28,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:20:28,478 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:20:28,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:20:28,660 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:20:28,808 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:20:28,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:20:28,845 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:20:29,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '290#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:20:29,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:20:29,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:20:29,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:20:29,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409382953] [2023-04-02 14:20:29,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:20:29,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:20:29,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:29,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:20:29,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-04-02 14:20:29,279 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:29,363 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2023-04-02 14:20:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:20:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 14:20:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:29,366 INFO L225 Difference]: With dead ends: 54 [2023-04-02 14:20:29,366 INFO L226 Difference]: Without dead ends: 42 [2023-04-02 14:20:29,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-04-02 14:20:29,370 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:29,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:20:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-02 14:20:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2023-04-02 14:20:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:20:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-04-02 14:20:29,383 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 15 [2023-04-02 14:20:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:29,383 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-04-02 14:20:29,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-04-02 14:20:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 14:20:29,385 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:29,385 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:29,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 14:20:29,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:29,591 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:29,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2029319373, now seen corresponding path program 2 times [2023-04-02 14:20:29,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:29,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632597562] [2023-04-02 14:20:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:29,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:29,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:29,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632597562] [2023-04-02 14:20:29,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632597562] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:20:29,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161614296] [2023-04-02 14:20:29,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:20:29,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:29,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:29,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:20:29,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:20:29,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 14:20:29,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:20:29,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:20:29,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:20:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:29,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:20:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:29,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161614296] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:20:29,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428507072] [2023-04-02 14:20:29,882 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:20:29,882 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:20:29,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:20:29,883 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:20:29,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:20:29,925 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:20:29,984 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:20:29,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:20:30,006 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:20:30,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '552#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:20:30,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:20:30,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:20:30,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:20:30,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357704275] [2023-04-02 14:20:30,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:20:30,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:20:30,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:30,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:20:30,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2023-04-02 14:20:30,402 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:30,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:30,510 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2023-04-02 14:20:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:20:30,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 14:20:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:30,512 INFO L225 Difference]: With dead ends: 96 [2023-04-02 14:20:30,512 INFO L226 Difference]: Without dead ends: 84 [2023-04-02 14:20:30,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2023-04-02 14:20:30,513 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:30,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 59 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:20:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-02 14:20:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 38. [2023-04-02 14:20:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:20:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-04-02 14:20:30,522 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 21 [2023-04-02 14:20:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:30,523 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-04-02 14:20:30,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-04-02 14:20:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 14:20:30,525 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:30,526 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:30,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:20:30,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 14:20:30,732 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:30,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash -638870237, now seen corresponding path program 3 times [2023-04-02 14:20:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:30,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088280706] [2023-04-02 14:20:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:30,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:31,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:31,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088280706] [2023-04-02 14:20:31,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088280706] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:20:31,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185517687] [2023-04-02 14:20:31,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:20:31,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:31,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:31,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:20:31,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:20:31,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:20:31,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:20:31,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:20:31,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:20:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:31,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:20:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:31,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185517687] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:20:31,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331594610] [2023-04-02 14:20:31,427 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:20:31,427 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:20:31,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:20:31,428 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:20:31,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:20:31,487 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:20:31,552 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:20:31,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:20:31,577 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:20:32,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '976#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:20:32,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:20:32,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:20:32,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:20:32,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867798117] [2023-04-02 14:20:32,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:20:32,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:20:32,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:32,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:20:32,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=941, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 14:20:32,015 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:32,270 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2023-04-02 14:20:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:20:32,271 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-04-02 14:20:32,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:32,272 INFO L225 Difference]: With dead ends: 180 [2023-04-02 14:20:32,272 INFO L226 Difference]: Without dead ends: 168 [2023-04-02 14:20:32,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=941, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 14:20:32,274 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 176 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:32,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 88 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:20:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-04-02 14:20:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 62. [2023-04-02 14:20:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:20:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-04-02 14:20:32,286 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 33 [2023-04-02 14:20:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:32,286 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-04-02 14:20:32,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-04-02 14:20:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 14:20:32,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:32,288 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:32,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:20:32,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:32,494 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:32,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:32,495 INFO L85 PathProgramCache]: Analyzing trace with hash 266533583, now seen corresponding path program 4 times [2023-04-02 14:20:32,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:32,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672420386] [2023-04-02 14:20:32,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:32,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:33,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:33,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672420386] [2023-04-02 14:20:33,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672420386] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:20:33,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131690079] [2023-04-02 14:20:33,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:20:33,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:33,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:20:33,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:20:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:33,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 14:20:33,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:20:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:33,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:20:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:34,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131690079] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:20:34,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [696019684] [2023-04-02 14:20:34,091 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:20:34,091 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:20:34,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:20:34,092 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:20:34,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:20:34,128 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:20:34,207 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:20:34,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:20:34,219 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:20:34,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1724#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:20:34,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:20:34,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:20:34,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 14:20:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434848371] [2023-04-02 14:20:34,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:20:34,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 14:20:34,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 14:20:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=2345, Unknown=0, NotChecked=0, Total=3660 [2023-04-02 14:20:34,671 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:35,275 INFO L93 Difference]: Finished difference Result 348 states and 418 transitions. [2023-04-02 14:20:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 14:20:35,275 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-02 14:20:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:35,278 INFO L225 Difference]: With dead ends: 348 [2023-04-02 14:20:35,278 INFO L226 Difference]: Without dead ends: 336 [2023-04-02 14:20:35,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1315, Invalid=2345, Unknown=0, NotChecked=0, Total=3660 [2023-04-02 14:20:35,280 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 524 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:35,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 121 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:20:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-04-02 14:20:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 110. [2023-04-02 14:20:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:20:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2023-04-02 14:20:35,296 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 57 [2023-04-02 14:20:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:35,300 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2023-04-02 14:20:35,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:20:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2023-04-02 14:20:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 14:20:35,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:35,303 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:35,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:20:35,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:35,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:35,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1722018343, now seen corresponding path program 5 times [2023-04-02 14:20:35,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:35,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77282187] [2023-04-02 14:20:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:35,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:37,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:37,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77282187] [2023-04-02 14:20:37,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77282187] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:20:37,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625271710] [2023-04-02 14:20:37,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:20:37,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:37,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:37,173 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:20:37,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:21:28,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2023-04-02 14:21:28,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:21:28,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 14:21:28,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:21:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:21:28,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:21:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:21:30,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625271710] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:21:30,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191873219] [2023-04-02 14:21:30,905 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:21:30,905 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:21:30,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:21:30,905 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:21:30,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:21:30,933 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:21:30,983 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:21:30,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:21:30,995 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:21:31,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3120#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:21:31,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:21:31,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:21:31,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-02 14:21:31,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019895832] [2023-04-02 14:21:31,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:21:31,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-02 14:21:31,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:21:31,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-02 14:21:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4891, Invalid=6881, Unknown=0, NotChecked=0, Total=11772 [2023-04-02 14:21:31,539 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:21:34,027 INFO L93 Difference]: Finished difference Result 684 states and 826 transitions. [2023-04-02 14:21:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-02 14:21:34,028 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2023-04-02 14:21:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:21:34,031 INFO L225 Difference]: With dead ends: 684 [2023-04-02 14:21:34,031 INFO L226 Difference]: Without dead ends: 672 [2023-04-02 14:21:34,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4891, Invalid=6881, Unknown=0, NotChecked=0, Total=11772 [2023-04-02 14:21:34,035 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1472 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 14:21:34,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1566 Valid, 152 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [889 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 14:21:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2023-04-02 14:21:34,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 206. [2023-04-02 14:21:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:21:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2023-04-02 14:21:34,061 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 105 [2023-04-02 14:21:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:21:34,061 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2023-04-02 14:21:34,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:21:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2023-04-02 14:21:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-04-02 14:21:34,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:21:34,064 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:21:34,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:21:34,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:34,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:21:34,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:21:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1388222679, now seen corresponding path program 6 times [2023-04-02 14:21:34,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:21:34,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751403795] [2023-04-02 14:21:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:21:34,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:21:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:21:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:21:39,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:21:39,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751403795] [2023-04-02 14:21:39,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751403795] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:21:39,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101068076] [2023-04-02 14:21:39,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:21:39,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:39,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:21:39,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:21:39,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:23:38,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:23:38,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:23:38,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-02 14:23:38,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:23:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:23:39,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:23:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:23:47,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101068076] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:23:47,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [249008512] [2023-04-02 14:23:47,555 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:23:47,556 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:23:47,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:23:47,556 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:23:47,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:23:47,599 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:23:47,645 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:23:47,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:23:47,657 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:23:48,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5812#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:23:48,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:23:48,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:23:48,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-04-02 14:23:48,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449860619] [2023-04-02 14:23:48,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:23:48,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-04-02 14:23:48,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:23:48,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-04-02 14:23:48,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18955, Invalid=22865, Unknown=0, NotChecked=0, Total=41820 [2023-04-02 14:23:48,429 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 193 states, 193 states have (on average 2.0207253886010363) internal successors, (390), 193 states have internal predecessors, (390), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:24:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:24:06,253 INFO L93 Difference]: Finished difference Result 1356 states and 1642 transitions. [2023-04-02 14:24:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-04-02 14:24:06,254 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0207253886010363) internal successors, (390), 193 states have internal predecessors, (390), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2023-04-02 14:24:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:24:06,261 INFO L225 Difference]: With dead ends: 1356 [2023-04-02 14:24:06,261 INFO L226 Difference]: Without dead ends: 1344 [2023-04-02 14:24:06,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4002 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=18955, Invalid=22865, Unknown=0, NotChecked=0, Total=41820 [2023-04-02 14:24:06,266 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2576 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 1529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2766 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1529 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 14:24:06,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2766 Valid, 256 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1529 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 14:24:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2023-04-02 14:24:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 398. [2023-04-02 14:24:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 392 states have (on average 1.0051020408163265) internal successors, (394), 392 states have internal predecessors, (394), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:24:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 399 transitions. [2023-04-02 14:24:06,335 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 399 transitions. Word has length 201 [2023-04-02 14:24:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:24:06,336 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 399 transitions. [2023-04-02 14:24:06,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0207253886010363) internal successors, (390), 193 states have internal predecessors, (390), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:24:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 399 transitions. [2023-04-02 14:24:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2023-04-02 14:24:06,341 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:24:06,341 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:24:06,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:24:06,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:06,569 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:24:06,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:24:06,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1613285833, now seen corresponding path program 7 times [2023-04-02 14:24:06,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:24:06,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349865309] [2023-04-02 14:24:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:24:06,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:24:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:24:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:24:25,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:24:25,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349865309] [2023-04-02 14:24:25,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349865309] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:24:25,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503888088] [2023-04-02 14:24:25,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:24:25,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:25,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:24:25,007 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:24:25,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:24:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:24:25,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 192 conjunts are in the unsatisfiable core [2023-04-02 14:24:25,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:24:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:24:25,854 INFO L327 TraceCheckSpWp]: Computing backward predicates...