/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 13:54:11,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 13:54:11,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 13:54:11,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 13:54:11,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 13:54:11,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 13:54:11,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 13:54:11,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 13:54:11,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 13:54:11,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 13:54:11,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 13:54:11,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 13:54:11,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 13:54:11,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 13:54:11,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 13:54:11,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 13:54:11,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 13:54:11,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 13:54:11,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 13:54:11,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 13:54:11,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 13:54:11,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 13:54:11,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 13:54:11,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 13:54:11,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 13:54:11,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 13:54:11,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 13:54:11,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 13:54:11,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 13:54:11,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 13:54:11,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 13:54:11,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 13:54:11,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 13:54:11,428 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 13:54:11,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 13:54:11,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 13:54:11,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 13:54:11,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 13:54:11,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 13:54:11,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 13:54:11,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 13:54:11,432 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 13:54:11,446 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 13:54:11,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 13:54:11,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 13:54:11,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 13:54:11,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 13:54:11,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 13:54:11,447 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 13:54:11,447 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 13:54:11,447 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 13:54:11,447 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 13:54:11,448 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 13:54:11,448 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 13:54:11,448 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 13:54:11,448 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 13:54:11,448 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 13:54:11,448 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 13:54:11,448 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 13:54:11,448 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 13:54:11,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 13:54:11,449 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 13:54:11,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 13:54:11,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 13:54:11,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 13:54:11,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 13:54:11,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 13:54:11,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 13:54:11,449 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 13:54:11,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 13:54:11,450 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 13:54:11,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 13:54:11,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 13:54:11,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 13:54:11,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:54:11,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 13:54:11,450 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 13:54:11,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 13:54:11,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 13:54:11,450 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 13:54:11,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 13:54:11,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 13:54:11,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 13:54:11,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 13:54:11,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 13:54:11,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 13:54:11,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 13:54:11,668 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 13:54:11,669 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 13:54:11,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2023-04-02 13:54:12,593 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 13:54:12,783 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 13:54:12,783 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2023-04-02 13:54:12,788 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d8373118/3b6e5f67962f46329dbf69da338e0d22/FLAG4cfedc3d6 [2023-04-02 13:54:12,803 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d8373118/3b6e5f67962f46329dbf69da338e0d22 [2023-04-02 13:54:12,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 13:54:12,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 13:54:12,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 13:54:12,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 13:54:12,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 13:54:12,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:12,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@275800ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12, skipping insertion in model container [2023-04-02 13:54:12,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:12,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 13:54:12,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 13:54:12,920 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2023-04-02 13:54:12,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:54:12,948 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 13:54:12,963 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2023-04-02 13:54:12,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:54:12,987 INFO L208 MainTranslator]: Completed translation [2023-04-02 13:54:12,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12 WrapperNode [2023-04-02 13:54:12,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 13:54:12,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 13:54:12,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 13:54:12,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 13:54:12,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:12,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:13,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:13,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:13,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:13,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:13,021 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:13,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:13,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 13:54:13,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 13:54:13,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 13:54:13,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 13:54:13,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12" (1/1) ... [2023-04-02 13:54:13,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:54:13,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:13,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 13:54:13,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 13:54:13,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 13:54:13,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 13:54:13,084 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 13:54:13,085 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 13:54:13,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 13:54:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 13:54:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 13:54:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 13:54:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 13:54:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 13:54:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 13:54:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 13:54:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 13:54:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 13:54:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 13:54:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 13:54:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 13:54:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 13:54:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 13:54:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 13:54:13,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 13:54:13,161 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 13:54:13,163 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 13:54:13,307 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 13:54:13,388 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 13:54:13,389 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-04-02 13:54:13,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:13 BoogieIcfgContainer [2023-04-02 13:54:13,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 13:54:13,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 13:54:13,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 13:54:13,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 13:54:13,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:54:12" (1/3) ... [2023-04-02 13:54:13,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599f5e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:13, skipping insertion in model container [2023-04-02 13:54:13,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:12" (2/3) ... [2023-04-02 13:54:13,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599f5e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:13, skipping insertion in model container [2023-04-02 13:54:13,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:13" (3/3) ... [2023-04-02 13:54:13,396 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2023-04-02 13:54:13,406 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 13:54:13,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 13:54:13,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 13:54:13,440 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;@1e8ba804, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 13:54:13,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 13:54:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 13:54:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 13:54:13,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:13,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:13,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:13,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:13,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1616914742, now seen corresponding path program 1 times [2023-04-02 13:54:13,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:13,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119090191] [2023-04-02 13:54:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:13,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:54:13,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:13,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119090191] [2023-04-02 13:54:13,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119090191] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:13,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:54:13,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:54:13,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700397537] [2023-04-02 13:54:13,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:13,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:54:13,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:54:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:54:13,664 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:13,723 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2023-04-02 13:54:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:54:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 13:54:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:13,738 INFO L225 Difference]: With dead ends: 51 [2023-04-02 13:54:13,738 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 13:54:13,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:54:13,743 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:13,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:13,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 13:54:13,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-02 13:54:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 13:54:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2023-04-02 13:54:13,766 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 13 [2023-04-02 13:54:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:13,767 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-04-02 13:54:13,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2023-04-02 13:54:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 13:54:13,768 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:13,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:13,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 13:54:13,768 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:13,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash -54295490, now seen corresponding path program 1 times [2023-04-02 13:54:13,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:13,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759058711] [2023-04-02 13:54:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:13,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:54:13,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:13,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759058711] [2023-04-02 13:54:13,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759058711] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:13,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138830478] [2023-04-02 13:54:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:13,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:13,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:13,898 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:13,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 13:54:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:13,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 13:54:13,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:13,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 13:54:13,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138830478] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:13,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 13:54:13,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 13:54:13,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396626508] [2023-04-02 13:54:13,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:13,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:54:13,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:54:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 13:54:13,996 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:14,053 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2023-04-02 13:54:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:54:14,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 13:54:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:14,054 INFO L225 Difference]: With dead ends: 45 [2023-04-02 13:54:14,054 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 13:54:14,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 13:54:14,055 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:14,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 33 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 13:54:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2023-04-02 13:54:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 13:54:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-04-02 13:54:14,061 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2023-04-02 13:54:14,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:14,062 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-04-02 13:54:14,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-04-02 13:54:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 13:54:14,062 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:14,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:14,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 13:54:14,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:14,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:14,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1196418365, now seen corresponding path program 1 times [2023-04-02 13:54:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:14,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624536291] [2023-04-02 13:54:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:14,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:54:14,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:14,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624536291] [2023-04-02 13:54:14,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624536291] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:14,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141003553] [2023-04-02 13:54:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:14,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:14,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:14,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:14,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 13:54:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:14,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:14,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:54:14,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:54:14,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141003553] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:14,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [606347790] [2023-04-02 13:54:14,451 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:54:14,451 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:14,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:14,456 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:14,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:14,530 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:14,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:14,587 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:14,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [606347790] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:14,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:14,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4, 4] total 14 [2023-04-02 13:54:14,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338897237] [2023-04-02 13:54:14,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:14,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 13:54:14,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:14,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 13:54:14,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-04-02 13:54:14,740 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 13:54:15,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:15,281 INFO L93 Difference]: Finished difference Result 67 states and 94 transitions. [2023-04-02 13:54:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 13:54:15,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 13:54:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:15,284 INFO L225 Difference]: With dead ends: 67 [2023-04-02 13:54:15,284 INFO L226 Difference]: Without dead ends: 48 [2023-04-02 13:54:15,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-04-02 13:54:15,288 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 129 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:15,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 5 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:54:15,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-02 13:54:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2023-04-02 13:54:15,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 13:54:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-04-02 13:54:15,308 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 15 [2023-04-02 13:54:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:15,308 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-04-02 13:54:15,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 13:54:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-04-02 13:54:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 13:54:15,310 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:15,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:15,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:15,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 13:54:15,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:15,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1153723750, now seen corresponding path program 1 times [2023-04-02 13:54:15,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:15,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839408276] [2023-04-02 13:54:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:15,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:15,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839408276] [2023-04-02 13:54:15,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839408276] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:15,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91710961] [2023-04-02 13:54:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:15,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:15,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:15,589 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:15,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 13:54:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:15,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:15,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:15,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:15,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91710961] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:15,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503166872] [2023-04-02 13:54:15,678 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:54:15,679 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:15,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:15,679 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:15,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:15,707 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:15,851 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-02 13:54:15,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:15,878 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:16,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '691#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_1| Int) (v_main_~i~0_BEFORE_CALL_1 Int) (v_main_~s~0_BEFORE_CALL_1 Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int) (v_main_~tmp~0_BEFORE_CALL_1 Int)) (and (or (= v_main_~i~0_BEFORE_CALL_1 v_main_~s~0_BEFORE_CALL_1) (exists ((|v_#memory_int_38| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_38| |v_main_~#a~0.base_BEFORE_CALL_1| (store (store (select |v_#memory_int_38| |v_main_~#a~0.base_BEFORE_CALL_1|) (+ |v_main_~#a~0.offset_BEFORE_CALL_1| (* v_main_~s~0_BEFORE_CALL_1 4)) (select (select |v_#memory_int_38| |v_main_~#a~0.base_BEFORE_CALL_1|) (+ |v_main_~#a~0.offset_BEFORE_CALL_1| (* v_main_~i~0_BEFORE_CALL_1 4)))) (+ |v_main_~#a~0.offset_BEFORE_CALL_1| (* v_main_~i~0_BEFORE_CALL_1 4)) v_main_~tmp~0_BEFORE_CALL_1)) |#memory_int|) (= v_main_~tmp~0_BEFORE_CALL_1 (select (select |v_#memory_int_38| |v_main_~#a~0.base_BEFORE_CALL_1|) (+ |v_main_~#a~0.offset_BEFORE_CALL_1| (* v_main_~s~0_BEFORE_CALL_1 4))))))) (< 1 v_main_~i~0_BEFORE_CALL_1) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) (+ |v_main_~#a~0.offset_BEFORE_CALL_1| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) |v_main_~#a~0.offset_BEFORE_CALL_1|)))))' at error location [2023-04-02 13:54:16,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:16,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:16,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:54:16,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381015027] [2023-04-02 13:54:16,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:16,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:54:16,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:54:16,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=284, Unknown=3, NotChecked=0, Total=342 [2023-04-02 13:54:16,240 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:16,288 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2023-04-02 13:54:16,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:54:16,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-02 13:54:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:16,289 INFO L225 Difference]: With dead ends: 52 [2023-04-02 13:54:16,289 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 13:54:16,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=284, Unknown=3, NotChecked=0, Total=342 [2023-04-02 13:54:16,290 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:16,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:16,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 13:54:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-02 13:54:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 13:54:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-04-02 13:54:16,297 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 16 [2023-04-02 13:54:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:16,298 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-04-02 13:54:16,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-04-02 13:54:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 13:54:16,298 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:16,298 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:16,311 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 13:54:16,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:16,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:16,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:16,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2133646226, now seen corresponding path program 2 times [2023-04-02 13:54:16,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:16,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828965670] [2023-04-02 13:54:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:16,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 13:54:16,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:16,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828965670] [2023-04-02 13:54:16,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828965670] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:16,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:54:16,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 13:54:16,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835029931] [2023-04-02 13:54:16,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:16,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 13:54:16,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 13:54:16,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 13:54:16,576 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:16,623 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2023-04-02 13:54:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 13:54:16,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 13:54:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:16,624 INFO L225 Difference]: With dead ends: 58 [2023-04-02 13:54:16,625 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 13:54:16,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 13:54:16,625 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:16,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:16,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 13:54:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2023-04-02 13:54:16,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 13:54:16,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-04-02 13:54:16,639 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 19 [2023-04-02 13:54:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:16,640 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-04-02 13:54:16,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:16,640 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-04-02 13:54:16,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 13:54:16,640 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:16,640 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:16,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 13:54:16,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:16,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1349965354, now seen corresponding path program 1 times [2023-04-02 13:54:16,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:16,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750351790] [2023-04-02 13:54:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:16,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:16,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:16,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750351790] [2023-04-02 13:54:16,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750351790] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:16,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257880499] [2023-04-02 13:54:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:16,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:16,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:16,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:16,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 13:54:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:16,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:54:16,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:16,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:16,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257880499] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:16,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [482063687] [2023-04-02 13:54:16,912 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 13:54:16,913 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:16,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:16,913 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:16,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:16,935 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:17,045 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:54:17,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:17,066 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:17,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1127#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (|v_main_~#a~0.offset_BEFORE_CALL_2| Int) (v_main_~s~0_BEFORE_CALL_2 Int) (v_main_~tmp~0_BEFORE_CALL_2 Int) (v_main_~i~0_BEFORE_CALL_2 Int)) (and (or (exists ((|v_#memory_int_46| (Array Int (Array Int Int)))) (and (= v_main_~tmp~0_BEFORE_CALL_2 (select (select |v_#memory_int_46| |v_main_~#a~0.base_BEFORE_CALL_2|) (+ |v_main_~#a~0.offset_BEFORE_CALL_2| (* v_main_~s~0_BEFORE_CALL_2 4)))) (= (store |v_#memory_int_46| |v_main_~#a~0.base_BEFORE_CALL_2| (store (store (select |v_#memory_int_46| |v_main_~#a~0.base_BEFORE_CALL_2|) (+ |v_main_~#a~0.offset_BEFORE_CALL_2| (* v_main_~s~0_BEFORE_CALL_2 4)) (select (select |v_#memory_int_46| |v_main_~#a~0.base_BEFORE_CALL_2|) (+ |v_main_~#a~0.offset_BEFORE_CALL_2| (* v_main_~i~0_BEFORE_CALL_2 4)))) (+ |v_main_~#a~0.offset_BEFORE_CALL_2| (* v_main_~i~0_BEFORE_CALL_2 4)) v_main_~tmp~0_BEFORE_CALL_2)) |#memory_int|))) (= v_main_~i~0_BEFORE_CALL_2 v_main_~s~0_BEFORE_CALL_2)) (<= v_main_~i~0_BEFORE_CALL_2 0) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) |v_main_~#a~0.offset_BEFORE_CALL_2|) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) (+ |v_main_~#a~0.offset_BEFORE_CALL_2| (* v_main_~i~0_BEFORE_CALL_2 4)))))))' at error location [2023-04-02 13:54:17,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:17,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:17,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 13:54:17,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35764861] [2023-04-02 13:54:17,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:17,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 13:54:17,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:17,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 13:54:17,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=485, Unknown=3, NotChecked=0, Total=600 [2023-04-02 13:54:17,360 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:17,402 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2023-04-02 13:54:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 13:54:17,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 13:54:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:17,404 INFO L225 Difference]: With dead ends: 64 [2023-04-02 13:54:17,404 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 13:54:17,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=485, Unknown=3, NotChecked=0, Total=600 [2023-04-02 13:54:17,405 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:17,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 13:54:17,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-02 13:54:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 13:54:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-04-02 13:54:17,414 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 19 [2023-04-02 13:54:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:17,414 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-04-02 13:54:17,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-04-02 13:54:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 13:54:17,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:17,415 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:17,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:17,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:17,623 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:17,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:17,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1493829334, now seen corresponding path program 2 times [2023-04-02 13:54:17,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:17,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972272126] [2023-04-02 13:54:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:17,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:17,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972272126] [2023-04-02 13:54:17,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972272126] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737922747] [2023-04-02 13:54:17,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:17,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:17,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:17,761 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:17,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 13:54:17,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-04-02 13:54:17,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:17,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 13:54:17,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:17,882 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 15 treesize of output 7 [2023-04-02 13:54:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 13:54:17,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 13:54:17,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737922747] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:17,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 13:54:17,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-04-02 13:54:17,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018233399] [2023-04-02 13:54:17,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:17,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 13:54:17,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:17,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 13:54:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-04-02 13:54:17,909 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:17,991 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2023-04-02 13:54:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 13:54:17,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-02 13:54:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:17,992 INFO L225 Difference]: With dead ends: 51 [2023-04-02 13:54:17,992 INFO L226 Difference]: Without dead ends: 49 [2023-04-02 13:54:17,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-04-02 13:54:17,993 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:17,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 61 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-02 13:54:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-04-02 13:54:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 13:54:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2023-04-02 13:54:18,009 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 25 [2023-04-02 13:54:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:18,009 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2023-04-02 13:54:18,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:54:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2023-04-02 13:54:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 13:54:18,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:18,010 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:18,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 13:54:18,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:18,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:18,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1087655005, now seen corresponding path program 1 times [2023-04-02 13:54:18,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:18,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625014882] [2023-04-02 13:54:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:18,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 13:54:18,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:18,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625014882] [2023-04-02 13:54:18,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625014882] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:18,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146657543] [2023-04-02 13:54:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:18,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:18,341 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:18,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 13:54:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:18,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:54:18,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 13:54:18,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 13:54:18,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146657543] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:18,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925396665] [2023-04-02 13:54:18,609 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:54:18,609 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:18,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:18,609 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:18,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:18,627 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:18,793 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 13:54:18,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:18,807 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:19,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1794#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~i~0_BEFORE_CALL_9 Int) (|v_main_~#a~0.base_BEFORE_CALL_9| Int) (v_main_~x~0_BEFORE_CALL_9 Int) (|v_main_~#a~0.offset_BEFORE_CALL_9| Int)) (and (<= 0 v_main_~x~0_BEFORE_CALL_9) (< v_main_~x~0_BEFORE_CALL_9 100000) (<= v_main_~i~0_BEFORE_CALL_9 v_main_~x~0_BEFORE_CALL_9) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_9|) (+ |v_main_~#a~0.offset_BEFORE_CALL_9| (* v_main_~x~0_BEFORE_CALL_9 4))) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_9|) (+ |v_main_~#a~0.offset_BEFORE_CALL_9| (* v_main_~i~0_BEFORE_CALL_9 4)))) (<= v_main_~i~0_BEFORE_CALL_9 0))))' at error location [2023-04-02 13:54:19,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:19,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:19,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 13:54:19,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140157310] [2023-04-02 13:54:19,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 13:54:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:19,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 13:54:19,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1139, Unknown=3, NotChecked=0, Total=1482 [2023-04-02 13:54:19,132 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:54:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:19,172 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2023-04-02 13:54:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 13:54:19,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-04-02 13:54:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:19,174 INFO L225 Difference]: With dead ends: 86 [2023-04-02 13:54:19,174 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 13:54:19,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=340, Invalid=1139, Unknown=3, NotChecked=0, Total=1482 [2023-04-02 13:54:19,175 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:19,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 13:54:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-02 13:54:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 13:54:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-04-02 13:54:19,188 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 32 [2023-04-02 13:54:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:19,188 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-04-02 13:54:19,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:54:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-04-02 13:54:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 13:54:19,189 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:19,189 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:19,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:19,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:19,416 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:19,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:19,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1723205213, now seen corresponding path program 2 times [2023-04-02 13:54:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:19,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037002007] [2023-04-02 13:54:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 13:54:19,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:19,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037002007] [2023-04-02 13:54:19,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037002007] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:19,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220349809] [2023-04-02 13:54:19,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:19,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:19,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:19,839 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:19,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 13:54:19,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 13:54:19,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:19,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 13:54:19,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2023-04-02 13:54:19,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-04-02 13:54:19,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220349809] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:19,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047120505] [2023-04-02 13:54:19,990 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:54:19,990 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:19,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:19,990 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:19,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:20,001 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:20,133 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 13:54:20,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:20,147 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:22,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2351#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_16| Int) (|v_main_~#a~0.base_BEFORE_CALL_16| Int) (v_main_~x~0_BEFORE_CALL_16 Int) (v_main_~i~0_BEFORE_CALL_16 Int)) (and (<= v_main_~i~0_BEFORE_CALL_16 v_main_~x~0_BEFORE_CALL_16) (<= v_main_~i~0_BEFORE_CALL_16 0) (<= 0 v_main_~x~0_BEFORE_CALL_16) (< v_main_~x~0_BEFORE_CALL_16 100000) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_16|) (+ |v_main_~#a~0.offset_BEFORE_CALL_16| (* v_main_~x~0_BEFORE_CALL_16 4))) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_16|) (+ |v_main_~#a~0.offset_BEFORE_CALL_16| (* v_main_~i~0_BEFORE_CALL_16 4)))))))' at error location [2023-04-02 13:54:22,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:22,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:22,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2023-04-02 13:54:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399821262] [2023-04-02 13:54:22,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:22,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 13:54:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:22,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 13:54:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1607, Unknown=5, NotChecked=0, Total=1980 [2023-04-02 13:54:22,648 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:54:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:23,218 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2023-04-02 13:54:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-02 13:54:23,218 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2023-04-02 13:54:23,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:23,219 INFO L225 Difference]: With dead ends: 104 [2023-04-02 13:54:23,219 INFO L226 Difference]: Without dead ends: 75 [2023-04-02 13:54:23,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1038, Invalid=4357, Unknown=7, NotChecked=0, Total=5402 [2023-04-02 13:54:23,223 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:23,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 114 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-04-02 13:54:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2023-04-02 13:54:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 57 states have internal predecessors, (66), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 13:54:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2023-04-02 13:54:23,235 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 44 [2023-04-02 13:54:23,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:23,235 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2023-04-02 13:54:23,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 31 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:54:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2023-04-02 13:54:23,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 13:54:23,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:23,236 INFO L195 NwaCegarLoop]: trace histogram [23, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:23,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 13:54:23,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:23,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:23,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1092517138, now seen corresponding path program 3 times [2023-04-02 13:54:23,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:23,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354040667] [2023-04-02 13:54:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:23,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 2 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:54:23,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:23,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354040667] [2023-04-02 13:54:23,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354040667] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:23,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222112800] [2023-04-02 13:54:23,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:23,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:23,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:23,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:23,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 13:54:24,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:24,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:24,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 13:54:24,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 13:54:24,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 2 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:54:24,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222112800] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:24,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708124012] [2023-04-02 13:54:24,634 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:54:24,635 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:24,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:24,635 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:24,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:24,644 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:24,743 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 13:54:24,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:24,754 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:29,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3062#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_23| Int) (v_main_~i~0_BEFORE_CALL_23 Int) (|v_main_~#a~0.base_BEFORE_CALL_23| Int) (v_main_~x~0_BEFORE_CALL_23 Int)) (and (<= v_main_~i~0_BEFORE_CALL_23 0) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_23|) (+ (* v_main_~x~0_BEFORE_CALL_23 4) |v_main_~#a~0.offset_BEFORE_CALL_23|)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_23|) (+ (* v_main_~i~0_BEFORE_CALL_23 4) |v_main_~#a~0.offset_BEFORE_CALL_23|))) (<= 0 v_main_~x~0_BEFORE_CALL_23) (<= v_main_~i~0_BEFORE_CALL_23 v_main_~x~0_BEFORE_CALL_23) (< v_main_~x~0_BEFORE_CALL_23 100000))))' at error location [2023-04-02 13:54:29,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:29,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:29,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-02 13:54:29,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504551359] [2023-04-02 13:54:29,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:29,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 13:54:29,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:29,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 13:54:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1313, Invalid=2842, Unknown=5, NotChecked=0, Total=4160 [2023-04-02 13:54:29,163 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:54:29,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:29,252 INFO L93 Difference]: Finished difference Result 130 states and 178 transitions. [2023-04-02 13:54:29,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 13:54:29,252 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2023-04-02 13:54:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:29,253 INFO L225 Difference]: With dead ends: 130 [2023-04-02 13:54:29,253 INFO L226 Difference]: Without dead ends: 92 [2023-04-02 13:54:29,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1313, Invalid=2842, Unknown=5, NotChecked=0, Total=4160 [2023-04-02 13:54:29,255 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:29,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-04-02 13:54:29,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-04-02 13:54:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 81 states have (on average 1.123456790123457) internal successors, (91), 82 states have internal predecessors, (91), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 13:54:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2023-04-02 13:54:29,271 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 48 [2023-04-02 13:54:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:29,271 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2023-04-02 13:54:29,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:54:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2023-04-02 13:54:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 13:54:29,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:29,272 INFO L195 NwaCegarLoop]: trace histogram [48, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:29,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:29,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 13:54:29,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:29,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:29,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1982263030, now seen corresponding path program 4 times [2023-04-02 13:54:29,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:29,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051889] [2023-04-02 13:54:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:29,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 2 proven. 1176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:54:30,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:30,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051889] [2023-04-02 13:54:30,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051889] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:30,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811862635] [2023-04-02 13:54:30,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:54:30,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:30,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:30,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:30,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 13:54:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:31,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 13:54:31,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 13:54:31,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 2 proven. 1176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:54:33,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811862635] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834572449] [2023-04-02 13:54:33,277 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:54:33,277 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:33,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:33,277 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:33,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:33,291 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:33,400 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 13:54:33,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:33,417 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:33,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4018#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_30| Int) (v_main_~x~0_BEFORE_CALL_30 Int) (v_main_~i~0_BEFORE_CALL_30 Int) (|v_main_~#a~0.offset_BEFORE_CALL_30| Int)) (and (<= v_main_~i~0_BEFORE_CALL_30 v_main_~x~0_BEFORE_CALL_30) (<= 0 v_main_~x~0_BEFORE_CALL_30) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_30|) (+ (* v_main_~x~0_BEFORE_CALL_30 4) |v_main_~#a~0.offset_BEFORE_CALL_30|)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_30|) (+ |v_main_~#a~0.offset_BEFORE_CALL_30| (* v_main_~i~0_BEFORE_CALL_30 4)))) (<= v_main_~i~0_BEFORE_CALL_30 0) (< v_main_~x~0_BEFORE_CALL_30 100000))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 13:54:33,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:33,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:33,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-02 13:54:33,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296133742] [2023-04-02 13:54:33,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:33,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-02 13:54:33,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:33,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-02 13:54:33,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5090, Invalid=8014, Unknown=6, NotChecked=0, Total=13110 [2023-04-02 13:54:33,990 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:54:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:34,119 INFO L93 Difference]: Finished difference Result 180 states and 253 transitions. [2023-04-02 13:54:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-02 13:54:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2023-04-02 13:54:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:34,121 INFO L225 Difference]: With dead ends: 180 [2023-04-02 13:54:34,121 INFO L226 Difference]: Without dead ends: 142 [2023-04-02 13:54:34,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5090, Invalid=8014, Unknown=6, NotChecked=0, Total=13110 [2023-04-02 13:54:34,124 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:34,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-02 13:54:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-04-02 13:54:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 131 states have (on average 1.0763358778625953) internal successors, (141), 132 states have internal predecessors, (141), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 13:54:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2023-04-02 13:54:34,149 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 73 [2023-04-02 13:54:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:34,149 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2023-04-02 13:54:34,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:54:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2023-04-02 13:54:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-02 13:54:34,150 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:34,150 INFO L195 NwaCegarLoop]: trace histogram [98, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:34,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:34,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:34,358 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:34,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1924598282, now seen corresponding path program 5 times [2023-04-02 13:54:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:34,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315181488] [2023-04-02 13:54:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:34,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 2 proven. 4851 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 13:54:39,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315181488] [2023-04-02 13:54:39,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315181488] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:39,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146251107] [2023-04-02 13:54:39,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:39,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:39,015 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:39,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 13:54:39,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 13:54:39,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:39,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 13:54:39,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4855 trivial. 0 not checked. [2023-04-02 13:54:39,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4853 trivial. 0 not checked. [2023-04-02 13:54:39,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146251107] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:39,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214688043] [2023-04-02 13:54:39,649 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:54:39,649 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:39,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:39,649 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:39,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:39,667 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:39,771 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 13:54:39,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:39,783 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:42,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5486#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_37| Int) (|v_main_~#a~0.base_BEFORE_CALL_37| Int) (v_main_~i~0_BEFORE_CALL_37 Int) (v_main_~x~0_BEFORE_CALL_37 Int)) (and (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_37|) (+ |v_main_~#a~0.offset_BEFORE_CALL_37| (* v_main_~x~0_BEFORE_CALL_37 4))) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_37|) (+ (* v_main_~i~0_BEFORE_CALL_37 4) |v_main_~#a~0.offset_BEFORE_CALL_37|))) (<= 0 v_main_~x~0_BEFORE_CALL_37) (<= v_main_~i~0_BEFORE_CALL_37 v_main_~x~0_BEFORE_CALL_37) (< v_main_~x~0_BEFORE_CALL_37 100000) (<= v_main_~i~0_BEFORE_CALL_37 0))))' at error location [2023-04-02 13:54:42,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:42,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:42,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 8, 8] total 113 [2023-04-02 13:54:42,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258794231] [2023-04-02 13:54:42,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:42,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-04-02 13:54:42,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-04-02 13:54:42,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5169, Invalid=10828, Unknown=5, NotChecked=0, Total=16002 [2023-04-02 13:54:42,794 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand has 113 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:54:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:47,395 INFO L93 Difference]: Finished difference Result 198 states and 237 transitions. [2023-04-02 13:54:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-04-02 13:54:47,395 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2023-04-02 13:54:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:47,396 INFO L225 Difference]: With dead ends: 198 [2023-04-02 13:54:47,396 INFO L226 Difference]: Without dead ends: 160 [2023-04-02 13:54:47,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10456 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=15586, Invalid=42227, Unknown=27, NotChecked=0, Total=57840 [2023-04-02 13:54:47,401 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 247 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:47,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 243 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:54:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-04-02 13:54:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2023-04-02 13:54:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 141 states have (on average 1.070921985815603) internal successors, (151), 142 states have internal predecessors, (151), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 13:54:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2023-04-02 13:54:47,428 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 123 [2023-04-02 13:54:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:47,428 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2023-04-02 13:54:47,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:54:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2023-04-02 13:54:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-02 13:54:47,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:47,430 INFO L195 NwaCegarLoop]: trace histogram [99, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:47,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:47,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 13:54:47,636 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:47,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1878622258, now seen corresponding path program 6 times [2023-04-02 13:54:47,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:47,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103609853] [2023-04-02 13:54:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:47,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 2 proven. 4950 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-02 13:54:52,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:52,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103609853] [2023-04-02 13:54:52,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103609853] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:52,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668425928] [2023-04-02 13:54:52,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:52,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:52,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:52,002 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:54:52,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 13:54:52,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:52,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:52,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-02 13:54:52,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-02 13:54:52,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:55:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 2 proven. 4950 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-02 13:55:01,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668425928] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:55:01,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012462616] [2023-04-02 13:55:01,245 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:55:01,245 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:55:01,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:55:01,246 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:55:01,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:55:01,255 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:55:01,395 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 13:55:01,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:55:01,408 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:55:02,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7368#(and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_44| Int) (v_main_~x~0_BEFORE_CALL_44 Int) (v_main_~i~0_BEFORE_CALL_44 Int) (|v_main_~#a~0.base_BEFORE_CALL_44| Int)) (and (< v_main_~x~0_BEFORE_CALL_44 100000) (<= 0 v_main_~x~0_BEFORE_CALL_44) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_44|) (+ |v_main_~#a~0.offset_BEFORE_CALL_44| (* v_main_~x~0_BEFORE_CALL_44 4))) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_44|) (+ |v_main_~#a~0.offset_BEFORE_CALL_44| (* v_main_~i~0_BEFORE_CALL_44 4)))) (<= v_main_~i~0_BEFORE_CALL_44 v_main_~x~0_BEFORE_CALL_44) (<= v_main_~i~0_BEFORE_CALL_44 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 13:55:02,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:55:02,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:55:02,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-02 13:55:02,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046209261] [2023-04-02 13:55:02,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:55:02,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-02 13:55:02,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:55:02,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-02 13:55:02,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20543, Invalid=26324, Unknown=5, NotChecked=0, Total=46872 [2023-04-02 13:55:02,310 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 203 states have internal predecessors, (219), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:55:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:55:02,679 INFO L93 Difference]: Finished difference Result 300 states and 424 transitions. [2023-04-02 13:55:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-02 13:55:02,680 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 203 states have internal predecessors, (219), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 130 [2023-04-02 13:55:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:55:02,681 INFO L225 Difference]: With dead ends: 300 [2023-04-02 13:55:02,681 INFO L226 Difference]: Without dead ends: 253 [2023-04-02 13:55:02,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4636 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=20543, Invalid=26324, Unknown=5, NotChecked=0, Total=46872 [2023-04-02 13:55:02,684 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:55:02,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 221 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:55:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-04-02 13:55:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2023-04-02 13:55:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 242 states have (on average 1.0413223140495869) internal successors, (252), 243 states have internal predecessors, (252), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 13:55:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 265 transitions. [2023-04-02 13:55:02,721 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 265 transitions. Word has length 130 [2023-04-02 13:55:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:55:02,721 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 265 transitions. [2023-04-02 13:55:02,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 203 states have internal predecessors, (219), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:55:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 265 transitions. [2023-04-02 13:55:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-04-02 13:55:02,723 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:55:02,723 INFO L195 NwaCegarLoop]: trace histogram [200, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:55:02,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 13:55:02,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 13:55:02,929 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:55:02,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:55:02,929 INFO L85 PathProgramCache]: Analyzing trace with hash 680684586, now seen corresponding path program 7 times [2023-04-02 13:55:02,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:55:02,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756271050] [2023-04-02 13:55:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:55:02,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:55:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:55:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20159 backedges. 2 proven. 20100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-02 13:55:20,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:55:20,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756271050] [2023-04-02 13:55:20,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756271050] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:55:20,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881719287] [2023-04-02 13:55:20,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:55:20,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:55:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:55:20,396 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:55:20,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 13:55:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:55:20,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-02 13:55:20,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:55:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20159 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-02 13:55:21,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:55:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20159 backedges. 2 proven. 20100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-02 13:55:56,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881719287] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:55:56,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183580480] [2023-04-02 13:55:56,855 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:55:56,855 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:55:56,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:55:56,856 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:55:56,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:55:56,865 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:55:56,961 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 13:55:56,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:55:56,974 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:55:58,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10238#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_51| Int) (v_main_~i~0_BEFORE_CALL_51 Int) (v_main_~x~0_BEFORE_CALL_51 Int) (|v_main_~#a~0.offset_BEFORE_CALL_51| Int)) (and (< v_main_~x~0_BEFORE_CALL_51 100000) (<= 0 v_main_~x~0_BEFORE_CALL_51) (<= v_main_~i~0_BEFORE_CALL_51 0) (<= v_main_~i~0_BEFORE_CALL_51 v_main_~x~0_BEFORE_CALL_51) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_51|) (+ |v_main_~#a~0.offset_BEFORE_CALL_51| (* v_main_~x~0_BEFORE_CALL_51 4))) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_51|) (+ |v_main_~#a~0.offset_BEFORE_CALL_51| (* v_main_~i~0_BEFORE_CALL_51 4)))))))' at error location [2023-04-02 13:55:58,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:55:58,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:55:58,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-04-02 13:55:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310934682] [2023-04-02 13:55:58,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:55:58,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-04-02 13:55:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:55:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-04-02 13:55:58,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81850, Invalid=93287, Unknown=5, NotChecked=0, Total=175142 [2023-04-02 13:55:58,567 INFO L87 Difference]: Start difference. First operand 253 states and 265 transitions. Second operand has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 405 states have internal predecessors, (421), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:56:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:56:00,057 INFO L93 Difference]: Finished difference Result 502 states and 727 transitions. [2023-04-02 13:56:00,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-04-02 13:56:00,058 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 405 states have internal predecessors, (421), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 231 [2023-04-02 13:56:00,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:56:00,059 INFO L225 Difference]: With dead ends: 502 [2023-04-02 13:56:00,059 INFO L226 Difference]: Without dead ends: 455 [2023-04-02 13:56:00,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9282 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=81850, Invalid=93287, Unknown=5, NotChecked=0, Total=175142 [2023-04-02 13:56:00,067 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 13:56:00,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 181 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 13:56:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-04-02 13:56:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2023-04-02 13:56:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 444 states have (on average 1.0225225225225225) internal successors, (454), 445 states have internal predecessors, (454), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 13:56:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 467 transitions. [2023-04-02 13:56:00,139 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 467 transitions. Word has length 231 [2023-04-02 13:56:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:56:00,139 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 467 transitions. [2023-04-02 13:56:00,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 405 states have internal predecessors, (421), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 13:56:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 467 transitions. [2023-04-02 13:56:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-04-02 13:56:00,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:56:00,143 INFO L195 NwaCegarLoop]: trace histogram [402, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:56:00,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 13:56:00,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 13:56:00,351 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:56:00,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:56:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2063273686, now seen corresponding path program 8 times [2023-04-02 13:56:00,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:56:00,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445771386] [2023-04-02 13:56:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:56:00,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:56:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:57:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 81062 backedges. 2 proven. 81003 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-02 13:57:15,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:57:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445771386] [2023-04-02 13:57:15,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445771386] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:57:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660738749] [2023-04-02 13:57:15,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:57:15,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:57:15,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:57:15,898 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:57:15,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 13:57:16,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 13:57:16,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:57:16,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 13:57:16,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:57:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 81062 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 81007 trivial. 0 not checked. [2023-04-02 13:57:18,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:57:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 81062 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 81005 trivial. 0 not checked. [2023-04-02 13:57:19,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660738749] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:57:19,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622375805] [2023-04-02 13:57:19,746 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:57:19,746 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:57:19,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:57:19,746 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:57:19,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:57:19,755 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:57:19,852 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 13:57:19,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:57:19,863 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:57:24,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15152#(and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_58| Int) (v_main_~i~0_BEFORE_CALL_58 Int) (|v_main_~#a~0.base_BEFORE_CALL_58| Int) (v_main_~x~0_BEFORE_CALL_58 Int)) (and (<= 0 v_main_~x~0_BEFORE_CALL_58) (<= v_main_~i~0_BEFORE_CALL_58 0) (<= v_main_~i~0_BEFORE_CALL_58 v_main_~x~0_BEFORE_CALL_58) (< v_main_~x~0_BEFORE_CALL_58 100000) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_58|) (+ |v_main_~#a~0.offset_BEFORE_CALL_58| (* v_main_~x~0_BEFORE_CALL_58 4))) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_58|) (+ |v_main_~#a~0.offset_BEFORE_CALL_58| (* v_main_~i~0_BEFORE_CALL_58 4)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 13:57:24,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:57:24,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:57:24,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 14, 14] total 429 [2023-04-02 13:57:24,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085090455] [2023-04-02 13:57:24,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:57:24,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 429 states [2023-04-02 13:57:24,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:57:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 429 interpolants. [2023-04-02 13:57:24,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82139, Invalid=113662, Unknown=5, NotChecked=0, Total=195806 [2023-04-02 13:57:24,971 INFO L87 Difference]: Start difference. First operand 455 states and 467 transitions. Second operand has 429 states, 429 states have (on average 1.0419580419580419) internal successors, (447), 429 states have internal predecessors, (447), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)