/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 13:54:11,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 13:54:11,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 13:54:11,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 13:54:11,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 13:54:11,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 13:54:11,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 13:54:11,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 13:54:11,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 13:54:11,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 13:54:11,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 13:54:11,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 13:54:11,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 13:54:11,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 13:54:11,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 13:54:11,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 13:54:11,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 13:54:11,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 13:54:11,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 13:54:11,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 13:54:11,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 13:54:11,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 13:54:11,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 13:54:11,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 13:54:11,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 13:54:11,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 13:54:11,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 13:54:11,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 13:54:11,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 13:54:11,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 13:54:11,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 13:54:11,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 13:54:11,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 13:54:11,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 13:54:11,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 13:54:11,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 13:54:11,344 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 13:54:11,365 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 13:54:11,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 13:54:11,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 13:54:11,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 13:54:11,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 13:54:11,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 13:54:11,366 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 13:54:11,366 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 13:54:11,366 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 13:54:11,366 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 13:54:11,367 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 13:54:11,367 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 13:54:11,367 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 13:54:11,367 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 13:54:11,367 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 13:54:11,367 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 13:54:11,367 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 13:54:11,367 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 13:54:11,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 13:54:11,368 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 13:54:11,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 13:54:11,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 13:54:11,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 13:54:11,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 13:54:11,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 13:54:11,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 13:54:11,369 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 13:54:11,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 13:54:11,369 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 13:54:11,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 13:54:11,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 13:54:11,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 13:54:11,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:54:11,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 13:54:11,369 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 13:54:11,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 13:54:11,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 13:54:11,370 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 13:54:11,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 13:54:11,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 13:54:11,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 13:54:11,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 13:54:11,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 13:54:11,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 13:54:11,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 13:54:11,569 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 13:54:11,570 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 13:54:11,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2023-04-02 13:54:12,655 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 13:54:12,819 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 13:54:12,819 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2023-04-02 13:54:12,822 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86d1d4930/cedb6eb6ec30454381a041b50eaa691f/FLAG572bd8dc5 [2023-04-02 13:54:12,831 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86d1d4930/cedb6eb6ec30454381a041b50eaa691f [2023-04-02 13:54:12,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 13:54:12,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 13:54:12,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 13:54:12,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 13:54:12,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 13:54:12,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:12,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4261d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12, skipping insertion in model container [2023-04-02 13:54:12,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:12,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 13:54:12,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 13:54:12,966 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2023-04-02 13:54:12,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:54:12,987 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 13:54:12,997 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2023-04-02 13:54:13,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:54:13,019 INFO L208 MainTranslator]: Completed translation [2023-04-02 13:54:13,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13 WrapperNode [2023-04-02 13:54:13,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 13:54:13,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 13:54:13,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 13:54:13,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 13:54:13,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,069 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 13:54:13,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 13:54:13,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 13:54:13,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 13:54:13,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (1/1) ... [2023-04-02 13:54:13,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:54:13,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:13,096 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 13:54:13,109 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 13:54:13,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 13:54:13,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 13:54:13,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 13:54:13,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 13:54:13,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 13:54:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 13:54:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 13:54:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 13:54:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 13:54:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 13:54:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 13:54:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 13:54:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 13:54:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 13:54:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 13:54:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 13:54:13,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 13:54:13,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 13:54:13,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 13:54:13,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 13:54:13,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 13:54:13,236 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 13:54:13,238 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 13:54:13,516 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 13:54:13,589 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 13:54:13,589 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-02 13:54:13,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:13 BoogieIcfgContainer [2023-04-02 13:54:13,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 13:54:13,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 13:54:13,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 13:54:13,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 13:54:13,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:54:12" (1/3) ... [2023-04-02 13:54:13,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7685c6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:13, skipping insertion in model container [2023-04-02 13:54:13,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:13" (2/3) ... [2023-04-02 13:54:13,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7685c6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:13, skipping insertion in model container [2023-04-02 13:54:13,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:13" (3/3) ... [2023-04-02 13:54:13,627 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2023-04-02 13:54:13,652 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 13:54:13,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 13:54:13,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 13:54:13,745 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;@e58260, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 13:54:13,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 13:54:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 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 13:54:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 13:54:13,753 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:13,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:13,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:13,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:13,774 INFO L85 PathProgramCache]: Analyzing trace with hash 789727649, now seen corresponding path program 1 times [2023-04-02 13:54:13,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:13,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510821973] [2023-04-02 13:54:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:13,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,038 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 13:54:14,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:14,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510821973] [2023-04-02 13:54:14,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510821973] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:14,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:54:14,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:54:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452008667] [2023-04-02 13:54:14,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:14,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:54:14,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:14,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:54:14,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:54:14,077 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 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 13:54:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:14,119 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-04-02 13:54:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:54:14,121 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 13:54:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:14,124 INFO L225 Difference]: With dead ends: 37 [2023-04-02 13:54:14,125 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 13:54:14,126 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 13:54:14,130 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:14,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 13:54:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-02 13:54:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 13:54:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-04-02 13:54:14,156 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2023-04-02 13:54:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:14,157 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-04-02 13:54:14,157 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 13:54:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-04-02 13:54:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 13:54:14,158 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:14,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:14,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 13:54:14,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:14,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:14,162 INFO L85 PathProgramCache]: Analyzing trace with hash -15636784, now seen corresponding path program 1 times [2023-04-02 13:54:14,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:14,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015587071] [2023-04-02 13:54:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:14,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:14,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:14,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015587071] [2023-04-02 13:54:14,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015587071] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:14,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:54:14,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:54:14,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178613858] [2023-04-02 13:54:14,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:14,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:54:14,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:14,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:54:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:54:14,251 INFO L87 Difference]: Start difference. First operand 19 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 13:54:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:14,271 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-04-02 13:54:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:54:14,272 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 13:54:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:14,272 INFO L225 Difference]: With dead ends: 30 [2023-04-02 13:54:14,273 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 13:54:14,276 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 13:54:14,278 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:14,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 13:54:14,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-02 13:54:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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 13:54:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-02 13:54:14,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2023-04-02 13:54:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:14,291 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-02 13:54:14,291 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 13:54:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-02 13:54:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 13:54:14,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:14,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:14,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 13:54:14,292 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:14,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:14,293 INFO L85 PathProgramCache]: Analyzing trace with hash 578410913, now seen corresponding path program 1 times [2023-04-02 13:54:14,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:14,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777859365] [2023-04-02 13:54:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:14,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:14,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:14,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777859365] [2023-04-02 13:54:14,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777859365] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:14,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750702683] [2023-04-02 13:54:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:14,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:14,363 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 13:54:14,364 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 13:54:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 13:54:14,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:14,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 13:54:14,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750702683] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:14,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 13:54:14,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 13:54:14,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658305741] [2023-04-02 13:54:14,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:14,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:54:14,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:14,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:54:14,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 13:54:14,444 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13:54:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:14,463 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-04-02 13:54:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:54:14,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2023-04-02 13:54:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:14,465 INFO L225 Difference]: With dead ends: 33 [2023-04-02 13:54:14,465 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 13:54:14,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 13:54:14,468 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:14,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 13:54:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 13:54:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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 13:54:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-02 13:54:14,474 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2023-04-02 13:54:14,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:14,474 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-02 13:54:14,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13:54:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-02 13:54:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 13:54:14,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:14,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:14,495 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 13:54:14,680 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 13:54:14,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:14,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:14,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1120817467, now seen corresponding path program 1 times [2023-04-02 13:54:14,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:14,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655779981] [2023-04-02 13:54:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:14,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:14,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:14,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655779981] [2023-04-02 13:54:14,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655779981] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:14,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678681159] [2023-04-02 13:54:14,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:14,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:14,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:14,756 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 13:54:14,758 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 13:54:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:14,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:14,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:14,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678681159] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004305989] [2023-04-02 13:54:14,942 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:54:14,942 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:14,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:14,951 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:14,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:15,008 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:15,204 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 13:54:15,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:15,214 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:19,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '440#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_1| Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) (+ |v_main_~#a~0.offset_BEFORE_CALL_1| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) |v_main_~#a~0.offset_BEFORE_CALL_1|))))' at error location [2023-04-02 13:54:19,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:19,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:19,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:54:19,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920543856] [2023-04-02 13:54:19,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:19,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:54:19,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:19,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:54:19,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:54:19,417 INFO L87 Difference]: Start difference. First operand 21 states and 25 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 13:54:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:19,446 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-04-02 13:54:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:54:19,446 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 17 [2023-04-02 13:54:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:19,447 INFO L225 Difference]: With dead ends: 38 [2023-04-02 13:54:19,447 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 13:54:19,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:54:19,448 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:19,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 13:54:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 13:54:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 13:54:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-04-02 13:54:19,451 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2023-04-02 13:54:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:19,451 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-04-02 13:54:19,451 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 13:54:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-04-02 13:54:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 13:54:19,452 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:19,452 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:19,457 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 13:54:19,656 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 13:54:19,656 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:19,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1798724972, now seen corresponding path program 2 times [2023-04-02 13:54:19,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:19,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180951589] [2023-04-02 13:54:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:19,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:19,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:19,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180951589] [2023-04-02 13:54:19,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180951589] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:19,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077572388] [2023-04-02 13:54:19,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:19,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:19,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:19,709 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 13:54:19,711 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 13:54:19,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 13:54:19,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:19,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:54:19,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:19,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:19,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077572388] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:19,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415668218] [2023-04-02 13:54:19,835 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:54:19,835 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:19,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:19,835 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:19,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:19,852 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:20,014 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 13:54:20,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:20,023 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:24,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '686#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (|v_main_~#a~0.offset_BEFORE_CALL_2| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) (+ |v_main_~#a~0.offset_BEFORE_CALL_2| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) |v_main_~#a~0.offset_BEFORE_CALL_2|))))' at error location [2023-04-02 13:54:24,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:24,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:24,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-04-02 13:54:24,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305428587] [2023-04-02 13:54:24,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:24,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 13:54:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:24,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 13:54:24,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-04-02 13:54:24,246 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 13:54:24,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:24,293 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2023-04-02 13:54:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 13:54:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 20 [2023-04-02 13:54:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:24,294 INFO L225 Difference]: With dead ends: 45 [2023-04-02 13:54:24,294 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 13:54:24,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-04-02 13:54:24,295 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:24,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 13:54:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-02 13:54:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 13:54:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-04-02 13:54:24,298 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2023-04-02 13:54:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:24,298 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-04-02 13:54:24,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 13:54:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-04-02 13:54:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 13:54:24,299 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:24,299 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:24,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 13:54:24,504 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 13:54:24,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:24,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:24,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1311085102, now seen corresponding path program 3 times [2023-04-02 13:54:24,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:24,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117421214] [2023-04-02 13:54:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:24,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 13:54:24,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:24,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117421214] [2023-04-02 13:54:24,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117421214] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:24,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562750147] [2023-04-02 13:54:24,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:24,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:24,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:24,599 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 13:54:24,601 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 13:54:24,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:24,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:24,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:54:24,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 13:54:24,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 13:54:24,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562750147] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:24,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685223577] [2023-04-02 13:54:24,931 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:54:24,931 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:24,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:24,931 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:24,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:24,946 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:25,040 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 13:54:25,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:25,046 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:29,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1015#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (|v_main_~#a~0.offset_BEFORE_CALL_3| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) (+ |v_main_~#a~0.offset_BEFORE_CALL_3| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) |v_main_~#a~0.offset_BEFORE_CALL_3|))))' at error location [2023-04-02 13:54:29,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:29,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:29,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 27 [2023-04-02 13:54:29,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560034770] [2023-04-02 13:54:29,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:29,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 13:54:29,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:29,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 13:54:29,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 13:54:29,272 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 13:54:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:29,338 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2023-04-02 13:54:29,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 13:54:29,341 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 27 [2023-04-02 13:54:29,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:29,342 INFO L225 Difference]: With dead ends: 59 [2023-04-02 13:54:29,342 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 13:54:29,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 13:54:29,343 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:29,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 13:54:29,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-02 13:54:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 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 13:54:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-04-02 13:54:29,347 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2023-04-02 13:54:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:29,347 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-04-02 13:54:29,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 13:54:29,347 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-04-02 13:54:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 13:54:29,348 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:29,348 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:29,357 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 13:54:29,548 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 13:54:29,548 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:29,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:29,549 INFO L85 PathProgramCache]: Analyzing trace with hash -740729484, now seen corresponding path program 4 times [2023-04-02 13:54:29,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:29,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523973494] [2023-04-02 13:54:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:29,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 13:54:30,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:30,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523973494] [2023-04-02 13:54:30,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523973494] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:30,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061519100] [2023-04-02 13:54:30,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:54:30,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:30,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:30,203 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 13:54:30,206 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 13:54:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:30,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 13:54:30,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 13:54:30,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 13:54:30,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061519100] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:30,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300772124] [2023-04-02 13:54:30,886 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:54:30,886 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:30,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:30,886 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:30,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:30,898 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:30,993 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 13:54:30,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:30,999 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:35,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1498#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (|v_main_~#a~0.offset_BEFORE_CALL_4| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) (+ |v_main_~#a~0.offset_BEFORE_CALL_4| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) |v_main_~#a~0.offset_BEFORE_CALL_4|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 13:54:35,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:35,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:35,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 13:54:35,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390823495] [2023-04-02 13:54:35,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:35,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 13:54:35,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:35,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 13:54:35,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1207, Invalid=2333, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 13:54:35,264 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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 13:54:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:35,323 INFO L93 Difference]: Finished difference Result 84 states and 115 transitions. [2023-04-02 13:54:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 13:54:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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 40 [2023-04-02 13:54:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:35,324 INFO L225 Difference]: With dead ends: 84 [2023-04-02 13:54:35,324 INFO L226 Difference]: Without dead ends: 68 [2023-04-02 13:54:35,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1207, Invalid=2333, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 13:54:35,326 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:35,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-02 13:54:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-04-02 13:54:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 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 13:54:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2023-04-02 13:54:35,331 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 40 [2023-04-02 13:54:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:35,331 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2023-04-02 13:54:35,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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 13:54:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2023-04-02 13:54:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 13:54:35,332 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:35,332 INFO L195 NwaCegarLoop]: trace histogram [46, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:35,348 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 13:54:35,537 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 13:54:35,538 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:35,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1763014388, now seen corresponding path program 5 times [2023-04-02 13:54:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:35,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254337950] [2023-04-02 13:54:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 13:54:36,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:36,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254337950] [2023-04-02 13:54:36,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254337950] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:36,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355346413] [2023-04-02 13:54:36,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:36,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:36,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:36,937 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 13:54:36,939 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 13:54:37,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 13:54:37,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:37,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 13:54:37,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-02 13:54:37,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-02 13:54:37,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355346413] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:37,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2046842424] [2023-04-02 13:54:37,210 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:54:37,210 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:37,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:37,211 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:37,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:37,221 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:37,342 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 13:54:37,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:37,352 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:41,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2231#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int) (|v_main_~#a~0.offset_BEFORE_CALL_5| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) (+ |v_main_~#a~0.offset_BEFORE_CALL_5| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) |v_main_~#a~0.offset_BEFORE_CALL_5|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 13:54:41,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:41,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:41,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 6, 6] total 57 [2023-04-02 13:54:41,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993547463] [2023-04-02 13:54:41,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:41,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-04-02 13:54:41,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:41,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-04-02 13:54:41,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1251, Invalid=3305, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 13:54:41,757 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 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 13:54:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:41,823 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2023-04-02 13:54:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-04-02 13:54:41,823 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 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 64 [2023-04-02 13:54:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:41,829 INFO L225 Difference]: With dead ends: 90 [2023-04-02 13:54:41,829 INFO L226 Difference]: Without dead ends: 74 [2023-04-02 13:54:41,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1251, Invalid=3305, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 13:54:41,830 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:41,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-02 13:54:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-04-02 13:54:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 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 13:54:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2023-04-02 13:54:41,835 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 64 [2023-04-02 13:54:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:41,835 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2023-04-02 13:54:41,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 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 13:54:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2023-04-02 13:54:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 13:54:41,836 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:41,836 INFO L195 NwaCegarLoop]: trace histogram [47, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:41,855 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 13:54:42,036 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 13:54:42,037 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:42,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1442109311, now seen corresponding path program 6 times [2023-04-02 13:54:42,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:42,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677539845] [2023-04-02 13:54:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:42,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 13:54:43,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:43,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677539845] [2023-04-02 13:54:43,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677539845] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:43,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548819377] [2023-04-02 13:54:43,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:43,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:43,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:43,426 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 13:54:43,428 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 13:54:43,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:43,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:43,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 13:54:43,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 13:54:43,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 13:54:45,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548819377] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:45,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697233271] [2023-04-02 13:54:45,837 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:54:45,837 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:45,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:45,837 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:45,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:45,846 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:45,921 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 13:54:45,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:45,926 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:50,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3066#(and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_6| Int) (|v_main_~#a~0.base_BEFORE_CALL_6| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) (+ |v_main_~#a~0.offset_BEFORE_CALL_6| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) |v_main_~#a~0.offset_BEFORE_CALL_6|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 13:54:50,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:50,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:50,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2023-04-02 13:54:50,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958108651] [2023-04-02 13:54:50,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:50,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-04-02 13:54:50,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:50,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-04-02 13:54:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4882, Invalid=7108, Unknown=0, NotChecked=0, Total=11990 [2023-04-02 13:54:50,344 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 99 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 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 13:54:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:50,444 INFO L93 Difference]: Finished difference Result 144 states and 200 transitions. [2023-04-02 13:54:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-04-02 13:54:50,444 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 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 70 [2023-04-02 13:54:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:50,445 INFO L225 Difference]: With dead ends: 144 [2023-04-02 13:54:50,445 INFO L226 Difference]: Without dead ends: 123 [2023-04-02 13:54:50,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=4882, Invalid=7108, Unknown=0, NotChecked=0, Total=11990 [2023-04-02 13:54:50,448 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:50,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-02 13:54:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-04-02 13:54:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 states have internal predecessors, (122), 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 13:54:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2023-04-02 13:54:50,454 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 70 [2023-04-02 13:54:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:50,454 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2023-04-02 13:54:50,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 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 13:54:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2023-04-02 13:54:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-02 13:54:50,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:50,455 INFO L195 NwaCegarLoop]: trace histogram [96, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:50,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:50,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:50,666 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:50,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:50,667 INFO L85 PathProgramCache]: Analyzing trace with hash 808965938, now seen corresponding path program 7 times [2023-04-02 13:54:50,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:50,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677616253] [2023-04-02 13:54:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:50,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 13:54:55,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677616253] [2023-04-02 13:54:55,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677616253] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718349901] [2023-04-02 13:54:55,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:54:55,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:55,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:55,315 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:55,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 13:54:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:55,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-02 13:54:55,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 13:54:55,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:55:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 13:55:01,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718349901] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:55:01,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [185430604] [2023-04-02 13:55:01,117 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:55:01,117 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:55:01,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:55:01,117 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:55:01,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:55:01,136 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:55:01,231 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 13:55:01,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:55:01,237 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:55:05,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4499#(and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_7| Int) (|v_main_~#a~0.base_BEFORE_CALL_7| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) (+ |v_main_~#a~0.offset_BEFORE_CALL_7| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) |v_main_~#a~0.offset_BEFORE_CALL_7|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 13:55:05,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:55:05,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:55:05,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2023-04-02 13:55:05,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141506120] [2023-04-02 13:55:05,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:55:05,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-04-02 13:55:05,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:55:05,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-04-02 13:55:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19337, Invalid=23719, Unknown=0, NotChecked=0, Total=43056 [2023-04-02 13:55:05,700 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 197 states, 197 states have (on average 1.0558375634517767) internal successors, (208), 197 states have internal predecessors, (208), 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 13:55:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:55:06,015 INFO L93 Difference]: Finished difference Result 242 states and 347 transitions. [2023-04-02 13:55:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-04-02 13:55:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 1.0558375634517767) internal successors, (208), 197 states have internal predecessors, (208), 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 119 [2023-04-02 13:55:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:55:06,017 INFO L225 Difference]: With dead ends: 242 [2023-04-02 13:55:06,017 INFO L226 Difference]: Without dead ends: 221 [2023-04-02 13:55:06,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=19337, Invalid=23719, Unknown=0, NotChecked=0, Total=43056 [2023-04-02 13:55:06,019 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:55:06,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:55:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-04-02 13:55:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-04-02 13:55:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 215 states have (on average 1.0232558139534884) internal successors, (220), 215 states have internal predecessors, (220), 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 13:55:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2023-04-02 13:55:06,030 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 119 [2023-04-02 13:55:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:55:06,030 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2023-04-02 13:55:06,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 1.0558375634517767) internal successors, (208), 197 states have internal predecessors, (208), 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 13:55:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2023-04-02 13:55:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-02 13:55:06,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:55:06,032 INFO L195 NwaCegarLoop]: trace histogram [194, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:55:06,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 13:55:06,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 13:55:06,241 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:55:06,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:55:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash -929923310, now seen corresponding path program 8 times [2023-04-02 13:55:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:55:06,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138219178] [2023-04-02 13:55:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:55:06,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:55:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:55:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 13:55:19,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:55:19,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138219178] [2023-04-02 13:55:19,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138219178] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:55:19,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609388877] [2023-04-02 13:55:19,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:55:19,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:55:19,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:55:19,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:55:19,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 13:55:20,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 13:55:20,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:55:20,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 13:55:20,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:55:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 18915 trivial. 0 not checked. [2023-04-02 13:55:20,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:55:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 18915 trivial. 0 not checked. [2023-04-02 13:55:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609388877] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:55:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241527719] [2023-04-02 13:55:21,514 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:55:21,514 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:55:21,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:55:21,514 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:55:21,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:55:21,524 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:55:21,618 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 13:55:21,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:55:21,626 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:55:26,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6930#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_8| Int) (|v_main_~#a~0.offset_BEFORE_CALL_8| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_8|) (+ |v_main_~#a~0.offset_BEFORE_CALL_8| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_8|) |v_main_~#a~0.offset_BEFORE_CALL_8|))))' at error location [2023-04-02 13:55:26,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:55:26,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:55:26,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 11, 11] total 215 [2023-04-02 13:55:26,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692290594] [2023-04-02 13:55:26,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:55:26,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2023-04-02 13:55:26,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:55:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2023-04-02 13:55:26,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19526, Invalid=31324, Unknown=0, NotChecked=0, Total=50850 [2023-04-02 13:55:26,750 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 215 states, 215 states have (on average 1.0651162790697675) internal successors, (229), 215 states have internal predecessors, (229), 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 13:55:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:55:27,034 INFO L93 Difference]: Finished difference Result 253 states and 271 transitions. [2023-04-02 13:55:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2023-04-02 13:55:27,034 INFO L78 Accepts]: Start accepts. Automaton has has 215 states, 215 states have (on average 1.0651162790697675) internal successors, (229), 215 states have internal predecessors, (229), 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 217 [2023-04-02 13:55:27,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:55:27,036 INFO L225 Difference]: With dead ends: 253 [2023-04-02 13:55:27,036 INFO L226 Difference]: Without dead ends: 232 [2023-04-02 13:55:27,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 623 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=19526, Invalid=31324, Unknown=0, NotChecked=0, Total=50850 [2023-04-02 13:55:27,038 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:55:27,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:55:27,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-02 13:55:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2023-04-02 13:55:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0221238938053097) internal successors, (231), 226 states have internal predecessors, (231), 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 13:55:27,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 236 transitions. [2023-04-02 13:55:27,047 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 236 transitions. Word has length 217 [2023-04-02 13:55:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:55:27,047 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 236 transitions. [2023-04-02 13:55:27,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 215 states, 215 states have (on average 1.0651162790697675) internal successors, (229), 215 states have internal predecessors, (229), 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 13:55:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 236 transitions. [2023-04-02 13:55:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-04-02 13:55:27,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:55:27,050 INFO L195 NwaCegarLoop]: trace histogram [195, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:55:27,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 13:55:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:55:27,256 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:55:27,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:55:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1843049537, now seen corresponding path program 9 times [2023-04-02 13:55:27,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:55:27,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360516233] [2023-04-02 13:55:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:55:27,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:55:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:55:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 19282 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-02 13:55:41,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:55:41,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360516233] [2023-04-02 13:55:41,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360516233] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:55:41,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212759753] [2023-04-02 13:55:41,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:55:41,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:55:41,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:55:41,420 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:55:41,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 13:55:41,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:55:41,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:55:41,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 1999 conjuncts, 197 conjunts are in the unsatisfiable core [2023-04-02 13:55:41,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:55:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19282 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-02 13:55:42,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:56:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 19282 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-02 13:56:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212759753] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:56:07,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [962882729] [2023-04-02 13:56:07,110 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:56:07,110 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:56:07,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:56:07,110 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:56:07,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:56:07,138 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:56:07,264 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-04-02 13:56:07,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:56:07,269 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:56:12,220 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9651#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_9| Int) (|v_main_~#a~0.offset_BEFORE_CALL_9| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_9|) (+ |v_main_~#a~0.offset_BEFORE_CALL_9| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_9|) |v_main_~#a~0.offset_BEFORE_CALL_9|))))' at error location [2023-04-02 13:56:12,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:56:12,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:56:12,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198, 198] total 395 [2023-04-02 13:56:12,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477065925] [2023-04-02 13:56:12,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:56:12,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2023-04-02 13:56:12,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:56:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2023-04-02 13:56:12,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77846, Invalid=86584, Unknown=0, NotChecked=0, Total=164430 [2023-04-02 13:56:12,236 INFO L87 Difference]: Start difference. First operand 232 states and 236 transitions. Second operand has 395 states, 395 states have (on average 1.0278481012658227) internal successors, (406), 395 states have internal predecessors, (406), 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 13:56:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:56:13,854 INFO L93 Difference]: Finished difference Result 460 states and 664 transitions. [2023-04-02 13:56:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2023-04-02 13:56:13,855 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 1.0278481012658227) internal successors, (406), 395 states have internal predecessors, (406), 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 228 [2023-04-02 13:56:13,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:56:13,856 INFO L225 Difference]: With dead ends: 460 [2023-04-02 13:56:13,856 INFO L226 Difference]: Without dead ends: 429 [2023-04-02 13:56:13,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7269 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=77846, Invalid=86584, Unknown=0, NotChecked=0, Total=164430 [2023-04-02 13:56:13,862 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 13:56:13,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 13:56:13,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2023-04-02 13:56:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2023-04-02 13:56:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 423 states have (on average 1.011820330969267) internal successors, (428), 423 states have internal predecessors, (428), 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 13:56:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 433 transitions. [2023-04-02 13:56:13,873 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 433 transitions. Word has length 228 [2023-04-02 13:56:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:56:13,873 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 433 transitions. [2023-04-02 13:56:13,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 1.0278481012658227) internal successors, (406), 395 states have internal predecessors, (406), 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 13:56:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 433 transitions. [2023-04-02 13:56:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-04-02 13:56:13,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:56:13,877 INFO L195 NwaCegarLoop]: trace histogram [392, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:56:13,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 13:56:14,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 13:56:14,085 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:56:14,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:56:14,085 INFO L85 PathProgramCache]: Analyzing trace with hash -423697934, now seen corresponding path program 10 times [2023-04-02 13:56:14,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:56:14,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027830740] [2023-04-02 13:56:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:56:14,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:56:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:57:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 77200 backedges. 0 proven. 77028 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-02 13:57:13,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:57:13,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027830740] [2023-04-02 13:57:13,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027830740] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:57:13,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076089699] [2023-04-02 13:57:13,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:57:13,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:57:13,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:57:13,309 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:57:13,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 13:57:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:57:14,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 3772 conjuncts, 394 conjunts are in the unsatisfiable core [2023-04-02 13:57:14,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:57:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 77200 backedges. 0 proven. 77028 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-02 13:57:14,658 INFO L327 TraceCheckSpWp]: Computing backward predicates...