/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:23:37,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:23:37,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:23:37,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:23:37,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:23:37,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:23:37,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:23:37,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:23:37,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:23:37,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:23:37,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:23:37,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:23:37,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:23:37,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:23:37,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:23:37,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:23:37,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:23:37,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:23:37,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:23:37,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:23:37,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:23:37,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:23:37,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:23:37,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:23:37,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 14:23:37,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:23:37,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:23:37,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:23:37,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:23:37,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:23:37,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:23:37,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:23:37,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:23:37,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:23:37,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:23:37,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:23:37,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:23:37,540 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:23:37,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:23:37,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:23:37,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:23:37,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:23:37,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:23:37,542 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:23:37,542 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:23:37,542 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:23:37,543 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:23:37,543 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:23:37,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:23:37,544 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:23:37,544 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:23:37,544 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:23:37,544 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:23:37,544 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:23:37,544 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:23:37,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:23:37,545 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:23:37,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:23:37,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:23:37,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:23:37,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:23:37,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:23:37,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:23:37,546 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:23:37,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:23:37,546 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:23:37,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:23:37,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:23:37,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:23:37,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:23:37,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:23:37,547 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:23:37,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:23:37,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:23:37,547 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:23:37,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:23:37,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:23:37,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:23:37,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:23:37,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:23:37,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:23:37,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:23:37,791 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:23:37,792 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:23:37,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-04-02 14:23:38,897 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:23:39,061 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:23:39,061 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2023-04-02 14:23:39,066 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73e35cab3/cf6196e19a04456a8f939d934a30500c/FLAG94fda9e56 [2023-04-02 14:23:39,078 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73e35cab3/cf6196e19a04456a8f939d934a30500c [2023-04-02 14:23:39,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:23:39,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:23:39,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:23:39,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:23:39,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:23:39,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba439cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39, skipping insertion in model container [2023-04-02 14:23:39,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:23:39,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:23:39,259 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-04-02 14:23:39,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:23:39,305 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:23:39,317 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2023-04-02 14:23:39,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:23:39,356 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:23:39,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39 WrapperNode [2023-04-02 14:23:39,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:23:39,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:23:39,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:23:39,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:23:39,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,408 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:23:39,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:23:39,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:23:39,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:23:39,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39" (1/1) ... [2023-04-02 14:23:39,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:23:39,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:23:39,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:23:39,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:23:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:23:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:23:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:23:39,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:23:39,486 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2023-04-02 14:23:39,486 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2023-04-02 14:23:39,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:23:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:23:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:23:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:23:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:23:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:23:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:23:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2023-04-02 14:23:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:23:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2023-04-02 14:23:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:23:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:23:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:23:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:23:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:23:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:23:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:23:39,577 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:23:39,579 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:23:39,778 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:23:39,856 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:23:39,856 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-02 14:23:39,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:23:39 BoogieIcfgContainer [2023-04-02 14:23:39,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:23:39,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:23:39,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:23:39,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:23:39,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:23:39" (1/3) ... [2023-04-02 14:23:39,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5278a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:23:39, skipping insertion in model container [2023-04-02 14:23:39,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:23:39" (2/3) ... [2023-04-02 14:23:39,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5278a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:23:39, skipping insertion in model container [2023-04-02 14:23:39,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:23:39" (3/3) ... [2023-04-02 14:23:39,877 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2023-04-02 14:23:39,895 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:23:39,895 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:23:39,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:23:39,949 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;@2a7ae849, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:23:39,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:23:39,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:23:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 14:23:39,959 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:23:39,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:23:39,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:23:39,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:23:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2072096722, now seen corresponding path program 1 times [2023-04-02 14:23:39,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:23:39,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791248292] [2023-04-02 14:23:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:39,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:23:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:23:40,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:23:40,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791248292] [2023-04-02 14:23:40,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791248292] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:23:40,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:23:40,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 14:23:40,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239545064] [2023-04-02 14:23:40,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:23:40,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 14:23:40,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:23:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 14:23:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:23:40,280 INFO L87 Difference]: Start difference. First operand has 37 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:23:40,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:23:40,424 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2023-04-02 14:23:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:23:40,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 14:23:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:23:40,434 INFO L225 Difference]: With dead ends: 77 [2023-04-02 14:23:40,434 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 14:23:40,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:23:40,441 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 57 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:23:40,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 46 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:23:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 14:23:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-04-02 14:23:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:23:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-04-02 14:23:40,487 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2023-04-02 14:23:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:23:40,489 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-04-02 14:23:40,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:23:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-04-02 14:23:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 14:23:40,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:23:40,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:23:40,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:23:40,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:23:40,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:23:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1225767276, now seen corresponding path program 1 times [2023-04-02 14:23:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:23:40,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234344907] [2023-04-02 14:23:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:23:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:40,617 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 14:23:40,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:23:40,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234344907] [2023-04-02 14:23:40,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234344907] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:23:40,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:23:40,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 14:23:40,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855617580] [2023-04-02 14:23:40,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:23:40,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 14:23:40,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:23:40,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 14:23:40,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:23:40,620 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:23:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:23:40,697 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2023-04-02 14:23:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:23:40,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-02 14:23:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:23:40,701 INFO L225 Difference]: With dead ends: 54 [2023-04-02 14:23:40,701 INFO L226 Difference]: Without dead ends: 41 [2023-04-02 14:23:40,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:23:40,708 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:23:40,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 38 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:23:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-02 14:23:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-04-02 14:23:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:23:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-04-02 14:23:40,723 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 16 [2023-04-02 14:23:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:23:40,723 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-04-02 14:23:40,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:23:40,723 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-04-02 14:23:40,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 14:23:40,724 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:23:40,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:23:40,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 14:23:40,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:23:40,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:23:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash -67286699, now seen corresponding path program 1 times [2023-04-02 14:23:40,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:23:40,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289794346] [2023-04-02 14:23:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:23:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:40,913 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 14:23:40,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:23:40,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289794346] [2023-04-02 14:23:40,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289794346] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:23:40,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:23:40,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 14:23:40,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313953078] [2023-04-02 14:23:40,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:23:40,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 14:23:40,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:23:40,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 14:23:40,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:23:40,917 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 14:23:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:23:40,992 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2023-04-02 14:23:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:23:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-04-02 14:23:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:23:40,994 INFO L225 Difference]: With dead ends: 66 [2023-04-02 14:23:40,995 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 14:23:40,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:23:40,996 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:23:40,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:23:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 14:23:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-02 14:23:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 14:23:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-04-02 14:23:41,003 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 25 [2023-04-02 14:23:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:23:41,003 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-04-02 14:23:41,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 14:23:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-04-02 14:23:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 14:23:41,004 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:23:41,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:23:41,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 14:23:41,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:23:41,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:23:41,005 INFO L85 PathProgramCache]: Analyzing trace with hash -615290471, now seen corresponding path program 1 times [2023-04-02 14:23:41,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:23:41,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876305395] [2023-04-02 14:23:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:41,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:23:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:41,115 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 14:23:41,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:23:41,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876305395] [2023-04-02 14:23:41,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876305395] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:23:41,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:23:41,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 14:23:41,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839544509] [2023-04-02 14:23:41,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:23:41,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 14:23:41,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:23:41,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 14:23:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:23:41,119 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:23:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:23:41,180 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2023-04-02 14:23:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:23:41,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-04-02 14:23:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:23:41,182 INFO L225 Difference]: With dead ends: 81 [2023-04-02 14:23:41,183 INFO L226 Difference]: Without dead ends: 50 [2023-04-02 14:23:41,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 14:23:41,184 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:23:41,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 101 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:23:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-02 14:23:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2023-04-02 14:23:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 32 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-02 14:23:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2023-04-02 14:23:41,192 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 26 [2023-04-02 14:23:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:23:41,192 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2023-04-02 14:23:41,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:23:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2023-04-02 14:23:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 14:23:41,193 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:23:41,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:23:41,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 14:23:41,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:23:41,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:23:41,194 INFO L85 PathProgramCache]: Analyzing trace with hash 699420199, now seen corresponding path program 1 times [2023-04-02 14:23:41,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:23:41,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106000604] [2023-04-02 14:23:41,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:41,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:23:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:23:41,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:23:41,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106000604] [2023-04-02 14:23:41,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106000604] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:23:41,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:23:41,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 14:23:41,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251865509] [2023-04-02 14:23:41,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:23:41,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 14:23:41,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:23:41,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 14:23:41,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:23:41,295 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:23:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:23:41,341 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2023-04-02 14:23:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 14:23:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-04-02 14:23:41,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:23:41,348 INFO L225 Difference]: With dead ends: 56 [2023-04-02 14:23:41,349 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 14:23:41,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:23:41,352 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:23:41,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 40 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:23:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 14:23:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-02 14:23:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-02 14:23:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-04-02 14:23:41,367 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 29 [2023-04-02 14:23:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:23:41,367 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-04-02 14:23:41,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:23:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-04-02 14:23:41,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 14:23:41,369 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:23:41,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:23:41,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 14:23:41,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:23:41,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:23:41,370 INFO L85 PathProgramCache]: Analyzing trace with hash 181095061, now seen corresponding path program 1 times [2023-04-02 14:23:41,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:23:41,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277207776] [2023-04-02 14:23:41,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:41,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:23:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 14:23:41,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:23:41,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277207776] [2023-04-02 14:23:41,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277207776] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:23:41,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:23:41,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:23:41,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071449489] [2023-04-02 14:23:41,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:23:41,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:23:41,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:23:41,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:23:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:23:41,426 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 14:23:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:23:41,458 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2023-04-02 14:23:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:23:41,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-04-02 14:23:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:23:41,462 INFO L225 Difference]: With dead ends: 54 [2023-04-02 14:23:41,462 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 14:23:41,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:23:41,464 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:23:41,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:23:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 14:23:41,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-02 14:23:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 33 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-02 14:23:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-04-02 14:23:41,479 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 30 [2023-04-02 14:23:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:23:41,479 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-04-02 14:23:41,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 14:23:41,480 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-04-02 14:23:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 14:23:41,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:23:41,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:23:41,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 14:23:41,486 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:23:41,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:23:41,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1896790991, now seen corresponding path program 1 times [2023-04-02 14:23:41,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:23:41,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901477847] [2023-04-02 14:23:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:41,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:23:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:23:41,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:23:41,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901477847] [2023-04-02 14:23:41,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901477847] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:23:41,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866304227] [2023-04-02 14:23:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:41,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:23:41,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:23:41,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:23:41,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:23:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:41,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:23:41,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:23:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:23:41,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:23:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:23:41,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866304227] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:23:41,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898867044] [2023-04-02 14:23:41,856 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 14:23:41,857 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:23:41,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:23:41,863 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:23:41,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:23:41,941 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:23:42,700 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 41 for LOIs [2023-04-02 14:23:42,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:23:42,735 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 27 for LOIs [2023-04-02 14:23:42,771 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:23:43,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1898867044] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:23:43,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:23:43,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [5, 5, 5] total 25 [2023-04-02 14:23:43,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120557936] [2023-04-02 14:23:43,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:23:43,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 14:23:43,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:23:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 14:23:43,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-04-02 14:23:43,899 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 17 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:23:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:23:46,359 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2023-04-02 14:23:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 14:23:46,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-04-02 14:23:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:23:46,361 INFO L225 Difference]: With dead ends: 120 [2023-04-02 14:23:46,361 INFO L226 Difference]: Without dead ends: 106 [2023-04-02 14:23:46,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=346, Invalid=1460, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 14:23:46,362 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 210 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 14:23:46,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 6 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 14:23:46,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-02 14:23:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 60. [2023-04-02 14:23:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 9 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-02 14:23:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2023-04-02 14:23:46,380 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 31 [2023-04-02 14:23:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:23:46,381 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2023-04-02 14:23:46,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:23:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2023-04-02 14:23:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 14:23:46,382 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:23:46,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:23:46,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 14:23:46,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:23:46,589 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:23:46,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:23:46,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1314103134, now seen corresponding path program 1 times [2023-04-02 14:23:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:23:46,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3529890] [2023-04-02 14:23:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:23:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 14:23:46,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:23:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3529890] [2023-04-02 14:23:46,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3529890] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:23:46,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439071788] [2023-04-02 14:23:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:46,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:23:46,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:23:46,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:23:46,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:23:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:46,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:23:46,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:23:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 14:23:46,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:23:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 14:23:46,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439071788] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:23:46,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200977680] [2023-04-02 14:23:46,877 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 14:23:46,877 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:23:46,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:23:46,878 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:23:46,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:23:46,898 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:23:49,580 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:23:49,601 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 77 for LOIs [2023-04-02 14:23:49,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:23:49,622 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 36 for LOIs [2023-04-02 14:23:49,660 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:23:52,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1727#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_28| Int)) (and (<= 0 (+ (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_28|) 0) 2147483648)) (<= 0 (+ 2147483647 (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_28|) 0) |#StackHeapBarrier|)) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_28|) 0) 2147483647) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_28| |#StackHeapBarrier|)) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_28|) 0) (+ 2147483645 |v_main_~#set~0.base_BEFORE_CALL_28|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_28|) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_28|) (<= 0 (+ |v_main_~#set~0.base_BEFORE_CALL_28| (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_28|) 0) 2147483646)) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_28|) 0) (+ |#StackHeapBarrier| 2147483646)))) (= |#NULL.base| 0))' at error location [2023-04-02 14:23:52,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:23:52,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:23:52,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-04-02 14:23:52,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001658180] [2023-04-02 14:23:52,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:23:52,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 14:23:52,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:23:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 14:23:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 14:23:52,582 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 14:23:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:23:52,764 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2023-04-02 14:23:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:23:52,764 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 41 [2023-04-02 14:23:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:23:52,765 INFO L225 Difference]: With dead ends: 146 [2023-04-02 14:23:52,765 INFO L226 Difference]: Without dead ends: 93 [2023-04-02 14:23:52,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=270, Invalid=1536, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 14:23:52,768 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:23:52,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 49 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:23:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-02 14:23:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2023-04-02 14:23:52,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.24) internal successors, (62), 53 states have internal predecessors, (62), 8 states have call successors, (8), 7 states have call predecessors, (8), 9 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-02 14:23:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2023-04-02 14:23:52,787 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 41 [2023-04-02 14:23:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:23:52,787 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2023-04-02 14:23:52,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 14:23:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2023-04-02 14:23:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 14:23:52,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:23:52,788 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:23:52,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:23:52,993 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,SelfDestructingSolverStorable7 [2023-04-02 14:23:52,993 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:23:52,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:23:52,994 INFO L85 PathProgramCache]: Analyzing trace with hash -677740296, now seen corresponding path program 2 times [2023-04-02 14:23:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:23:52,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306330230] [2023-04-02 14:23:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:23:52,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:23:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:23:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 14:23:53,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:23:53,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306330230] [2023-04-02 14:23:53,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306330230] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:23:53,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068599425] [2023-04-02 14:23:53,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:23:53,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:23:53,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:23:53,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:23:53,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:23:53,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:23:53,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:23:53,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 14:23:53,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:23:53,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-04-02 14:23:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:23:53,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:23:53,511 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-02 14:23:53,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-04-02 14:23:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:23:53,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068599425] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:23:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841820716] [2023-04-02 14:23:53,546 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 14:23:53,546 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:23:53,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:23:53,546 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:23:53,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:23:53,566 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:23:55,744 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:23:55,759 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 77 for LOIs [2023-04-02 14:23:55,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:23:55,776 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 36 for LOIs [2023-04-02 14:23:55,803 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:23:59,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2374#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_47| Int)) (and (<= 0 (+ 2147483648 (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_47|) 0))) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_47|) 0) (+ 2147483645 |v_main_~#set~0.base_BEFORE_CALL_47|)) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_47| |#StackHeapBarrier|)) (<= 0 (+ 2147483647 |#StackHeapBarrier| (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_47|) 0))) (<= 0 (+ |v_main_~#set~0.base_BEFORE_CALL_47| (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_47|) 0) 2147483646)) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_47|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_47|) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_47|) 0) (+ |#StackHeapBarrier| 2147483646)) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_47|) 0) 2147483647))) (= |#NULL.base| 0))' at error location [2023-04-02 14:23:59,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:23:59,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:23:59,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 22 [2023-04-02 14:23:59,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058877499] [2023-04-02 14:23:59,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:23:59,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 14:23:59,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:23:59,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 14:23:59,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2136, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 14:23:59,043 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 5 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 14:23:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:23:59,770 INFO L93 Difference]: Finished difference Result 172 states and 211 transitions. [2023-04-02 14:23:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 14:23:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 5 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 45 [2023-04-02 14:23:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:23:59,773 INFO L225 Difference]: With dead ends: 172 [2023-04-02 14:23:59,773 INFO L226 Difference]: Without dead ends: 114 [2023-04-02 14:23:59,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=590, Invalid=5416, Unknown=0, NotChecked=0, Total=6006 [2023-04-02 14:23:59,775 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:23:59,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 195 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:23:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-04-02 14:23:59,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 77. [2023-04-02 14:23:59,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 61 states have internal predecessors, (70), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-02 14:23:59,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2023-04-02 14:23:59,797 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 45 [2023-04-02 14:23:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:23:59,797 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2023-04-02 14:23:59,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 5 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 14:23:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2023-04-02 14:23:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 14:23:59,798 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:23:59,798 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:23:59,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:24:00,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:00,005 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:24:00,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:24:00,006 INFO L85 PathProgramCache]: Analyzing trace with hash 866362353, now seen corresponding path program 1 times [2023-04-02 14:24:00,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:24:00,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052384810] [2023-04-02 14:24:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:24:00,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:24:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:24:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:24:00,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:24:00,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052384810] [2023-04-02 14:24:00,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052384810] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:24:00,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860607458] [2023-04-02 14:24:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:24:00,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:00,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:24:00,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:24:00,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:24:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:24:00,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 14:24:00,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:24:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:24:00,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:24:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:24:00,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860607458] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:24:00,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219183673] [2023-04-02 14:24:00,366 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 14:24:00,366 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:24:00,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:24:00,367 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:24:00,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:24:00,391 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:24:02,549 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:24:02,567 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 77 for LOIs [2023-04-02 14:24:02,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:24:02,585 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 36 for LOIs [2023-04-02 14:24:02,615 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:24:05,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3136#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#set~0.base_BEFORE_CALL_66| Int)) (and (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_66|) 0) (+ |#StackHeapBarrier| 2147483646)) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_66|) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_66|) 0) (+ 2147483645 |v_main_~#set~0.base_BEFORE_CALL_66|)) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_66| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_66|) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_66|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_66|) 0) 2147483648)) (<= 0 (+ (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_66|) 0) |v_main_~#set~0.base_BEFORE_CALL_66| 2147483646)) (<= 0 (+ (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_66|) 0) 2147483647 |#StackHeapBarrier|)))) (= ~SIZE~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:24:05,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:24:05,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:24:05,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-04-02 14:24:05,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417084377] [2023-04-02 14:24:05,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:24:05,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 14:24:05,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:24:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 14:24:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1967, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 14:24:05,510 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:24:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:24:05,811 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2023-04-02 14:24:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 14:24:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2023-04-02 14:24:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:24:05,813 INFO L225 Difference]: With dead ends: 201 [2023-04-02 14:24:05,813 INFO L226 Difference]: Without dead ends: 135 [2023-04-02 14:24:05,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=499, Invalid=2471, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 14:24:05,815 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:24:05,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 87 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:24:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-04-02 14:24:05,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2023-04-02 14:24:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.203125) internal successors, (77), 68 states have internal predecessors, (77), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-02 14:24:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2023-04-02 14:24:05,837 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 47 [2023-04-02 14:24:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:24:05,838 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2023-04-02 14:24:05,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:24:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2023-04-02 14:24:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 14:24:05,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:24:05,839 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:24:05,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:24:06,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:06,046 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:24:06,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:24:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 475583435, now seen corresponding path program 2 times [2023-04-02 14:24:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:24:06,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656550461] [2023-04-02 14:24:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:24:06,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:24:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:24:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:24:06,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:24:06,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656550461] [2023-04-02 14:24:06,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656550461] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:24:06,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324722129] [2023-04-02 14:24:06,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:24:06,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:06,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:24:06,441 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:24:06,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:24:06,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:24:06,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:24:06,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 14:24:06,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:24:06,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-04-02 14:24:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-04-02 14:24:06,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:24:06,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2023-04-02 14:24:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-04-02 14:24:06,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324722129] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:24:06,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [945534008] [2023-04-02 14:24:06,860 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 14:24:06,860 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:24:06,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:24:06,860 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:24:06,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:24:06,878 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:24:08,915 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:24:08,931 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 77 for LOIs [2023-04-02 14:24:08,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:24:08,948 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 36 for LOIs [2023-04-02 14:24:08,980 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:24:12,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3960#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#set~0.base_BEFORE_CALL_85| Int)) (and (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_85| |#StackHeapBarrier|)) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_85|) 0) (+ |#StackHeapBarrier| 2147483646)) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_85|) 0) (+ 2147483645 |v_main_~#set~0.base_BEFORE_CALL_85|)) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_85|) 0) 2147483647) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_85|) (<= 0 (+ |v_main_~#set~0.base_BEFORE_CALL_85| (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_85|) 0) 2147483646)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_85|) (<= 0 (+ 2147483647 |#StackHeapBarrier| (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_85|) 0))) (<= 0 (+ 2147483648 (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_85|) 0))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:24:12,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:24:12,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:24:12,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 27 [2023-04-02 14:24:12,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356332640] [2023-04-02 14:24:12,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:24:12,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 14:24:12,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:24:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 14:24:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 14:24:12,102 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 14:24:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:24:13,998 INFO L93 Difference]: Finished difference Result 382 states and 517 transitions. [2023-04-02 14:24:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-04-02 14:24:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2023-04-02 14:24:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:24:14,001 INFO L225 Difference]: With dead ends: 382 [2023-04-02 14:24:14,001 INFO L226 Difference]: Without dead ends: 316 [2023-04-02 14:24:14,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5529 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3092, Invalid=11670, Unknown=0, NotChecked=0, Total=14762 [2023-04-02 14:24:14,006 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 413 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:24:14,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 137 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:24:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-04-02 14:24:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 115. [2023-04-02 14:24:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 99 states have internal predecessors, (122), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-02 14:24:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 142 transitions. [2023-04-02 14:24:14,055 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 142 transitions. Word has length 54 [2023-04-02 14:24:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:24:14,055 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 142 transitions. [2023-04-02 14:24:14,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-02 14:24:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 142 transitions. [2023-04-02 14:24:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 14:24:14,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:24:14,056 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:24:14,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:24:14,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 14:24:14,260 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:24:14,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:24:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1736478744, now seen corresponding path program 3 times [2023-04-02 14:24:14,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:24:14,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342561676] [2023-04-02 14:24:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:24:14,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:24:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:24:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:24:14,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:24:14,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342561676] [2023-04-02 14:24:14,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342561676] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:24:14,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73047906] [2023-04-02 14:24:14,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:24:14,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:14,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:24:14,793 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:24:14,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:24:14,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:24:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:24:14,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-02 14:24:14,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:24:15,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:24:15,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2023-04-02 14:24:15,224 INFO L321 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2023-04-02 14:24:15,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2023-04-02 14:24:15,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:24:15,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 12 [2023-04-02 14:24:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-04-02 14:24:15,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:24:15,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 82 [2023-04-02 14:24:15,780 INFO L321 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-04-02 14:24:15,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 509 treesize of output 355 [2023-04-02 14:24:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-04-02 14:24:15,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73047906] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:24:15,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253669367] [2023-04-02 14:24:15,881 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 14:24:15,882 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:24:15,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:24:15,883 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:24:15,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:24:15,903 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:24:17,875 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:24:17,896 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 77 for LOIs [2023-04-02 14:24:17,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:24:17,919 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 36 for LOIs [2023-04-02 14:24:17,955 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:24:21,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5330#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#set~0.base_BEFORE_CALL_104| Int)) (and (<= 0 (+ |v_main_~#set~0.base_BEFORE_CALL_104| (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_104|) 0) 2147483646)) (<= 3 (+ |v_main_~#set~0.base_BEFORE_CALL_104| |#StackHeapBarrier|)) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_104|) 0) 2147483647) (<= 0 (+ 2147483647 |#StackHeapBarrier| (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_104|) 0))) (<= 2 |v_main_~#set~0.base_BEFORE_CALL_104|) (<= 0 (+ (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_104|) 0) 2147483648)) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_104|) 0) (+ |#StackHeapBarrier| 2147483646)) (<= (select (select |#memory_int| |v_main_~#set~0.base_BEFORE_CALL_104|) 0) (+ 2147483645 |v_main_~#set~0.base_BEFORE_CALL_104|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#set~0.base_BEFORE_CALL_104|))) (= ~SIZE~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:24:21,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:24:21,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:24:21,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 13] total 43 [2023-04-02 14:24:21,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071003331] [2023-04-02 14:24:21,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:24:21,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-02 14:24:21,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:24:21,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-02 14:24:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=4387, Unknown=1, NotChecked=0, Total=4830 [2023-04-02 14:24:21,753 INFO L87 Difference]: Start difference. First operand 115 states and 142 transitions. Second operand has 43 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:24:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:24:28,585 INFO L93 Difference]: Finished difference Result 424 states and 548 transitions. [2023-04-02 14:24:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-04-02 14:24:28,586 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-04-02 14:24:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:24:28,588 INFO L225 Difference]: With dead ends: 424 [2023-04-02 14:24:28,588 INFO L226 Difference]: Without dead ends: 331 [2023-04-02 14:24:28,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6982 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3610, Invalid=19951, Unknown=1, NotChecked=0, Total=23562 [2023-04-02 14:24:28,594 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 661 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:24:28,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 259 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 14:24:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-04-02 14:24:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 162. [2023-04-02 14:24:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 139 states have (on average 1.20863309352518) internal successors, (168), 144 states have internal predecessors, (168), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2023-04-02 14:24:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2023-04-02 14:24:28,670 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 60 [2023-04-02 14:24:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:24:28,670 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2023-04-02 14:24:28,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:24:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2023-04-02 14:24:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-02 14:24:28,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:24:28,671 INFO L195 NwaCegarLoop]: trace histogram [17, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:24:28,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:24:28,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:28,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:24:28,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:24:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1709506206, now seen corresponding path program 1 times [2023-04-02 14:24:28,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:24:28,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548473233] [2023-04-02 14:24:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:24:28,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:24:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:24:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 14:24:29,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:24:29,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548473233] [2023-04-02 14:24:29,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548473233] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:24:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303338288] [2023-04-02 14:24:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:24:29,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:29,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:24:29,389 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:24:29,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:24:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:24:29,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 14:24:29,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:24:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 14:24:29,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:24:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 14:24:30,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303338288] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:24:30,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419079979] [2023-04-02 14:24:30,286 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-02 14:24:30,286 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:24:30,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:24:30,287 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:24:30,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:24:30,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:24:32,345 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 14:24:32,357 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 77 for LOIs [2023-04-02 14:24:32,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:24:32,381 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 36 for LOIs [2023-04-02 14:24:32,401 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:24:35,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6984#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:24:35,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:24:35,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:24:35,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2023-04-02 14:24:35,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541676388] [2023-04-02 14:24:35,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:24:35,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-04-02 14:24:35,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:24:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-04-02 14:24:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1607, Invalid=5703, Unknown=0, NotChecked=0, Total=7310 [2023-04-02 14:24:35,951 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand has 58 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 58 states have internal predecessors, (94), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 14:24:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:24:37,151 INFO L93 Difference]: Finished difference Result 477 states and 610 transitions. [2023-04-02 14:24:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-02 14:24:37,151 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 58 states have internal predecessors, (94), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2023-04-02 14:24:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:24:37,153 INFO L225 Difference]: With dead ends: 477 [2023-04-02 14:24:37,153 INFO L226 Difference]: Without dead ends: 338 [2023-04-02 14:24:37,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5186 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2347, Invalid=8365, Unknown=0, NotChecked=0, Total=10712 [2023-04-02 14:24:37,156 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 594 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:24:37,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 100 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:24:37,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-04-02 14:24:37,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 181. [2023-04-02 14:24:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 158 states have (on average 1.1835443037974684) internal successors, (187), 163 states have internal predecessors, (187), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2023-04-02 14:24:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 211 transitions. [2023-04-02 14:24:37,220 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 211 transitions. Word has length 69 [2023-04-02 14:24:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:24:37,220 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 211 transitions. [2023-04-02 14:24:37,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 58 states have internal predecessors, (94), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 14:24:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 211 transitions. [2023-04-02 14:24:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-02 14:24:37,221 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:24:37,221 INFO L195 NwaCegarLoop]: trace histogram [36, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:24:37,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 14:24:37,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:37,424 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:24:37,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:24:37,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2115771964, now seen corresponding path program 2 times [2023-04-02 14:24:37,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:24:37,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167501077] [2023-04-02 14:24:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:24:37,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:24:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:24:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 2 proven. 666 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 14:24:38,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:24:38,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167501077] [2023-04-02 14:24:38,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167501077] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:24:38,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375494698] [2023-04-02 14:24:38,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:24:38,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:38,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:24:38,750 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:24:38,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 14:24:38,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:24:38,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:24:38,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 14:24:38,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:24:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2023-04-02 14:24:39,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:24:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-02 14:24:39,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375494698] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:24:39,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501112347] [2023-04-02 14:24:39,206 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-02 14:24:39,206 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:24:39,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:24:39,207 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:24:39,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:24:39,222 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:24:41,120 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 14:24:41,131 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 77 for LOIs [2023-04-02 14:24:41,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:24:41,143 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 36 for LOIs [2023-04-02 14:24:41,163 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:24:45,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8731#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:24:45,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:24:45,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:24:45,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 6, 6] total 47 [2023-04-02 14:24:45,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291481857] [2023-04-02 14:24:45,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:24:45,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-04-02 14:24:45,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:24:45,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-04-02 14:24:45,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=4610, Unknown=0, NotChecked=0, Total=5550 [2023-04-02 14:24:45,214 INFO L87 Difference]: Start difference. First operand 181 states and 211 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-02 14:24:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:24:46,852 INFO L93 Difference]: Finished difference Result 556 states and 710 transitions. [2023-04-02 14:24:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-02 14:24:46,853 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 88 [2023-04-02 14:24:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:24:46,857 INFO L225 Difference]: With dead ends: 556 [2023-04-02 14:24:46,857 INFO L226 Difference]: Without dead ends: 417 [2023-04-02 14:24:46,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2447, Invalid=10435, Unknown=0, NotChecked=0, Total=12882 [2023-04-02 14:24:46,859 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 529 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 14:24:46,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 100 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 14:24:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2023-04-02 14:24:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 245. [2023-04-02 14:24:46,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 207 states have (on average 1.1594202898550725) internal successors, (240), 207 states have internal predecessors, (240), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (39), 28 states have call predecessors, (39), 25 states have call successors, (39) [2023-04-02 14:24:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 305 transitions. [2023-04-02 14:24:46,964 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 305 transitions. Word has length 88 [2023-04-02 14:24:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:24:46,964 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 305 transitions. [2023-04-02 14:24:46,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-02 14:24:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 305 transitions. [2023-04-02 14:24:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 14:24:46,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:24:46,968 INFO L195 NwaCegarLoop]: trace histogram [37, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:24:46,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-02 14:24:47,175 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,SelfDestructingSolverStorable13 [2023-04-02 14:24:47,175 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:24:47,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:24:47,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1470965270, now seen corresponding path program 3 times [2023-04-02 14:24:47,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:24:47,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712767316] [2023-04-02 14:24:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:24:47,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:24:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:24:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 2 proven. 703 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-04-02 14:24:48,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:24:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712767316] [2023-04-02 14:24:48,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712767316] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:24:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328625269] [2023-04-02 14:24:48,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:24:48,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:24:48,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:24:48,608 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:24:48,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 14:24:48,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:24:48,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:24:48,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-02 14:24:48,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:24:49,244 INFO L321 Elim1Store]: treesize reduction 78, result has 31.6 percent of original size [2023-04-02 14:24:49,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 58 [2023-04-02 14:24:49,324 INFO L321 Elim1Store]: treesize reduction 38, result has 43.3 percent of original size [2023-04-02 14:24:49,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 48 [2023-04-02 14:24:49,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-04-02 14:24:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2023-04-02 14:24:49,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:24:54,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2023-04-02 14:24:54,425 INFO L321 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2023-04-02 14:24:54,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 457 treesize of output 308 [2023-04-02 14:24:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2023-04-02 14:24:54,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328625269] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:24:54,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010723877] [2023-04-02 14:24:54,640 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-02 14:24:54,640 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:24:54,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:24:54,641 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:24:54,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:24:54,652 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:24:56,547 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 14:24:56,559 INFO L197 IcfgInterpreter]: Interpreting procedure insert with input of size 77 for LOIs [2023-04-02 14:24:56,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:24:56,571 INFO L197 IcfgInterpreter]: Interpreting procedure elem_exists with input of size 36 for LOIs [2023-04-02 14:24:56,605 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:25:01,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10984#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:25:01,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:25:01,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:25:01,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 18, 16] total 67 [2023-04-02 14:25:01,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355220232] [2023-04-02 14:25:01,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:25:01,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-04-02 14:25:01,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:25:01,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-04-02 14:25:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1068, Invalid=7862, Unknown=0, NotChecked=0, Total=8930 [2023-04-02 14:25:01,629 INFO L87 Difference]: Start difference. First operand 245 states and 305 transitions. Second operand has 67 states, 66 states have (on average 1.6818181818181819) internal successors, (111), 65 states have internal predecessors, (111), 6 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-02 14:25:09,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 14:25:11,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 14:25:13,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-02 14:25:27,628 WARN L223 SmtUtils]: Spent 14.28s on a formula simplification. DAG size of input: 78 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 14:26:08,412 WARN L223 SmtUtils]: Spent 29.41s on a formula simplification. DAG size of input: 92 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 14:26:20,210 WARN L223 SmtUtils]: Spent 9.59s on a formula simplification. DAG size of input: 78 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 14:26:22,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 14:26:24,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 14:26:26,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-02 14:26:28,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-02 14:26:30,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-02 14:26:43,317 WARN L223 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 78 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 14:26:45,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 14:26:47,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-02 14:26:59,860 WARN L223 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 85 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 14:27:13,505 WARN L223 SmtUtils]: Spent 11.31s on a formula simplification. DAG size of input: 78 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 14:27:15,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 14:27:17,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 14:27:19,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-02 14:27:35,774 WARN L223 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 85 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 14:27:44,188 WARN L223 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 78 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 14:27:46,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-02 14:27:47,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]