/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/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 13:54:19,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 13:54:19,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 13:54:19,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 13:54:19,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 13:54:19,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 13:54:19,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 13:54:19,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 13:54:19,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 13:54:19,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 13:54:19,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 13:54:19,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 13:54:19,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 13:54:19,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 13:54:19,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 13:54:19,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 13:54:19,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 13:54:19,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 13:54:19,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 13:54:19,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 13:54:19,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 13:54:19,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 13:54:19,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 13:54:19,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 13:54:19,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 13:54:19,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 13:54:19,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 13:54:19,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 13:54:19,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 13:54:19,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 13:54:19,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 13:54:19,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 13:54:19,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 13:54:19,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 13:54:19,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 13:54:19,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 13:54:19,765 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 13:54:19,794 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 13:54:19,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 13:54:19,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 13:54:19,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 13:54:19,795 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 13:54:19,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 13:54:19,796 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 13:54:19,796 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 13:54:19,796 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 13:54:19,796 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 13:54:19,797 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 13:54:19,797 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 13:54:19,797 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 13:54:19,798 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 13:54:19,798 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 13:54:19,798 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 13:54:19,798 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 13:54:19,798 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 13:54:19,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 13:54:19,799 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 13:54:19,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 13:54:19,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 13:54:19,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 13:54:19,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 13:54:19,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 13:54:19,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 13:54:19,801 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 13:54:19,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 13:54:19,801 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 13:54:19,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 13:54:19,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 13:54:19,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 13:54:19,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:54:19,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 13:54:19,802 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 13:54:19,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 13:54:19,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 13:54:19,803 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 13:54:19,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 13:54:19,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 13:54:19,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 13:54:19,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 13:54:20,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 13:54:20,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 13:54:20,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 13:54:20,046 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 13:54:20,047 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 13:54:20,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-04-02 13:54:21,197 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 13:54:21,423 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 13:54:21,424 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-04-02 13:54:21,430 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043f8c723/7aa1b48b470d4bb99ba7c6e1cdccde25/FLAGa8c762081 [2023-04-02 13:54:21,446 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043f8c723/7aa1b48b470d4bb99ba7c6e1cdccde25 [2023-04-02 13:54:21,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 13:54:21,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 13:54:21,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 13:54:21,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 13:54:21,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 13:54:21,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aca263c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21, skipping insertion in model container [2023-04-02 13:54:21,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 13:54:21,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 13:54:21,634 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/standard_allDiff2_ground.i[817,830] [2023-04-02 13:54:21,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:54:21,661 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 13:54:21,672 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/standard_allDiff2_ground.i[817,830] [2023-04-02 13:54:21,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:54:21,692 INFO L208 MainTranslator]: Completed translation [2023-04-02 13:54:21,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21 WrapperNode [2023-04-02 13:54:21,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 13:54:21,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 13:54:21,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 13:54:21,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 13:54:21,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,728 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 13:54:21,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 13:54:21,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 13:54:21,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 13:54:21,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21" (1/1) ... [2023-04-02 13:54:21,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:54:21,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:21,770 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 13:54:21,785 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 13:54:21,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 13:54:21,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 13:54:21,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 13:54:21,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 13:54:21,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 13:54:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 13:54:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 13:54:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 13:54:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 13:54:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 13:54:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 13:54:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 13:54:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 13:54:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 13:54:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 13:54:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 13:54:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 13:54:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 13:54:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 13:54:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 13:54:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 13:54:21,871 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 13:54:21,873 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 13:54:22,071 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 13:54:22,118 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 13:54:22,118 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-02 13:54:22,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:22 BoogieIcfgContainer [2023-04-02 13:54:22,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 13:54:22,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 13:54:22,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 13:54:22,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 13:54:22,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:54:21" (1/3) ... [2023-04-02 13:54:22,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2035bb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:22, skipping insertion in model container [2023-04-02 13:54:22,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:21" (2/3) ... [2023-04-02 13:54:22,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2035bb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:22, skipping insertion in model container [2023-04-02 13:54:22,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:22" (3/3) ... [2023-04-02 13:54:22,128 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2023-04-02 13:54:22,143 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 13:54:22,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 13:54:22,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 13:54:22,190 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;@4c9b51a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 13:54:22,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 13:54:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:22,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 13:54:22,208 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:22,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:22,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:22,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:22,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1795763941, now seen corresponding path program 1 times [2023-04-02 13:54:22,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:22,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888365733] [2023-04-02 13:54:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:22,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:22,476 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 13:54:22,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888365733] [2023-04-02 13:54:22,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888365733] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:22,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:54:22,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:54:22,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900774234] [2023-04-02 13:54:22,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:22,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:54:22,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:22,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:54:22,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:54:22,511 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) 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 13:54:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:22,553 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-04-02 13:54:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:54:22,555 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 13:54:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:22,560 INFO L225 Difference]: With dead ends: 41 [2023-04-02 13:54:22,561 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 13:54:22,564 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 13:54:22,569 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:22,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 13:54:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-02 13:54:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:54:22,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-02 13:54:22,595 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2023-04-02 13:54:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:22,596 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-02 13:54:22,596 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 13:54:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-02 13:54:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 13:54:22,597 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:22,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:22,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 13:54:22,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:22,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1052173814, now seen corresponding path program 1 times [2023-04-02 13:54:22,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:22,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897991974] [2023-04-02 13:54:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:22,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:22,784 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 13:54:22,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:22,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897991974] [2023-04-02 13:54:22,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897991974] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:22,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:54:22,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 13:54:22,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333210742] [2023-04-02 13:54:22,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:22,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 13:54:22,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:22,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 13:54:22,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 13:54:22,787 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 13:54:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:22,845 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-04-02 13:54:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 13:54:22,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 13:54:22,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:22,846 INFO L225 Difference]: With dead ends: 33 [2023-04-02 13:54:22,847 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 13:54:22,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 13:54:22,852 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:22,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 13:54:22,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-04-02 13:54:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:54:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-02 13:54:22,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2023-04-02 13:54:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:22,863 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-02 13:54:22,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 13:54:22,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-02 13:54:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 13:54:22,864 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:22,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:22,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 13:54:22,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:22,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:22,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1962572682, now seen corresponding path program 1 times [2023-04-02 13:54:22,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:22,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286023851] [2023-04-02 13:54:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:22,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:22,943 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 13:54:22,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:22,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286023851] [2023-04-02 13:54:22,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286023851] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:22,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586078510] [2023-04-02 13:54:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:22,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:22,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:22,948 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 13:54:22,983 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 13:54:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:23,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:23,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:23,068 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 13:54:23,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:23,095 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 13:54:23,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586078510] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:23,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950789693] [2023-04-02 13:54:23,113 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 13:54:23,113 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:23,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:23,121 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:23,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:23,198 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:23,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:23,307 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:23,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1950789693] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:23,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:23,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4, 4] total 14 [2023-04-02 13:54:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274815447] [2023-04-02 13:54:23,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:23,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 13:54:23,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 13:54:23,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-04-02 13:54:23,522 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 13:54:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:24,018 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2023-04-02 13:54:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 13:54:24,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2023-04-02 13:54:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:24,020 INFO L225 Difference]: With dead ends: 36 [2023-04-02 13:54:24,020 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 13:54:24,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-04-02 13:54:24,021 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:24,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 4 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 13:54:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-04-02 13:54:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:54:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-02 13:54:24,036 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2023-04-02 13:54:24,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:24,036 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-02 13:54:24,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 13:54:24,037 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-02 13:54:24,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 13:54:24,038 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:24,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:24,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:24,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:24,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:24,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash 262720732, now seen corresponding path program 1 times [2023-04-02 13:54:24,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:24,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215376113] [2023-04-02 13:54:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:24,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:24,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:24,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215376113] [2023-04-02 13:54:24,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215376113] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:24,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944144531] [2023-04-02 13:54:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:24,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:24,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:24,347 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 13:54:24,368 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 13:54:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:24,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:24,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:24,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 13:54:24,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944144531] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:24,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [356773641] [2023-04-02 13:54:24,465 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 13:54:24,466 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:24,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:24,466 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:24,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:24,510 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:24,879 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:24,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:24,909 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:25,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '537#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_1|) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_1|)))) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:25,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:25,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:25,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:54:25,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990588762] [2023-04-02 13:54:25,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:25,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:54:25,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:54:25,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-04-02 13:54:25,507 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 13:54:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:25,577 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2023-04-02 13:54:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:54:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 18 [2023-04-02 13:54:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:25,585 INFO L225 Difference]: With dead ends: 54 [2023-04-02 13:54:25,586 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 13:54:25,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-04-02 13:54:25,589 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:25,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 63 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 13:54:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2023-04-02 13:54:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:54:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-02 13:54:25,611 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2023-04-02 13:54:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:25,611 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-02 13:54:25,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 13:54:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-02 13:54:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 13:54:25,613 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:25,613 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:25,623 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 13:54:25,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 13:54:25,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:25,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:25,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1021154411, now seen corresponding path program 2 times [2023-04-02 13:54:25,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:25,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248870905] [2023-04-02 13:54:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:25,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 13:54:25,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:25,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248870905] [2023-04-02 13:54:25,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248870905] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:25,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841142069] [2023-04-02 13:54:25,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:25,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:25,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:25,908 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 13:54:25,911 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 13:54:25,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 13:54:25,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:25,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 13:54:25,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 13:54:25,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 13:54:26,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841142069] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:26,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138778944] [2023-04-02 13:54:26,014 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 13:54:26,014 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:26,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:26,015 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:26,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:26,036 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:26,212 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:26,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:26,228 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:26,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '813#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_2|) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0)))) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:26,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:26,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:26,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-04-02 13:54:26,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442224974] [2023-04-02 13:54:26,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:26,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 13:54:26,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:26,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 13:54:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-04-02 13:54:26,768 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 13:54:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:26,857 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-04-02 13:54:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 13:54:26,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 21 [2023-04-02 13:54:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:26,859 INFO L225 Difference]: With dead ends: 44 [2023-04-02 13:54:26,859 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 13:54:26,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-04-02 13:54:26,860 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:26,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 13:54:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-02 13:54:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:54:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-04-02 13:54:26,876 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 21 [2023-04-02 13:54:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:26,876 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-04-02 13:54:26,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 13:54:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-04-02 13:54:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 13:54:26,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:26,877 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:26,885 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 13:54:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:27,083 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:27,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash 319523883, now seen corresponding path program 3 times [2023-04-02 13:54:27,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:27,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892276799] [2023-04-02 13:54:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 13:54:27,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:27,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892276799] [2023-04-02 13:54:27,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892276799] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:27,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690106048] [2023-04-02 13:54:27,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:27,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:27,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:27,194 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 13:54:27,197 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 13:54:27,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:27,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:27,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 13:54:27,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 13:54:27,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 13:54:27,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690106048] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:27,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [552084177] [2023-04-02 13:54:27,347 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 13:54:27,347 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:27,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:27,348 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:27,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:27,364 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:27,535 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:27,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:27,552 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:28,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1131#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int)) (and (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 4)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_3|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:28,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:28,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:28,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2023-04-02 13:54:28,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205370911] [2023-04-02 13:54:28,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:28,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 13:54:28,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 13:54:28,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2023-04-02 13:54:28,103 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 13:54:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:28,292 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2023-04-02 13:54:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 13:54:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-02 13:54:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:28,293 INFO L225 Difference]: With dead ends: 77 [2023-04-02 13:54:28,293 INFO L226 Difference]: Without dead ends: 50 [2023-04-02 13:54:28,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 13:54:28,294 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:28,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 65 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-02 13:54:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-04-02 13:54:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:54:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2023-04-02 13:54:28,310 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 27 [2023-04-02 13:54:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:28,311 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2023-04-02 13:54:28,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 13:54:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2023-04-02 13:54:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 13:54:28,312 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:28,312 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:28,321 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 13:54:28,518 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 13:54:28,518 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:28,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1810561220, now seen corresponding path program 4 times [2023-04-02 13:54:28,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:28,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798397089] [2023-04-02 13:54:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 13:54:28,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:28,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798397089] [2023-04-02 13:54:28,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798397089] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:28,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522913457] [2023-04-02 13:54:28,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:54:28,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:28,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:28,801 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 13:54:28,804 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 13:54:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:28,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 13:54:28,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 13:54:28,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 13:54:29,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522913457] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:29,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303163105] [2023-04-02 13:54:29,141 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 13:54:29,141 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:29,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:29,141 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:29,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:29,155 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:29,330 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:29,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:29,347 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:29,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1682#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_4|) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 4)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_4|)))) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:29,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:29,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:29,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-04-02 13:54:29,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145911507] [2023-04-02 13:54:29,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:29,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 13:54:29,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:29,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 13:54:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1226, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 13:54:29,892 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 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 13:54:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:30,186 INFO L93 Difference]: Finished difference Result 187 states and 277 transitions. [2023-04-02 13:54:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 13:54:30,186 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 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 46 [2023-04-02 13:54:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:30,187 INFO L225 Difference]: With dead ends: 187 [2023-04-02 13:54:30,187 INFO L226 Difference]: Without dead ends: 154 [2023-04-02 13:54:30,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=1226, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 13:54:30,189 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 428 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:30,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 88 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:54:30,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-04-02 13:54:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 63. [2023-04-02 13:54:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:54:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-04-02 13:54:30,211 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 46 [2023-04-02 13:54:30,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:30,212 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-04-02 13:54:30,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 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 13:54:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-04-02 13:54:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 13:54:30,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:30,213 INFO L195 NwaCegarLoop]: trace histogram [24, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:30,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:30,419 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 13:54:30,420 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:30,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:30,420 INFO L85 PathProgramCache]: Analyzing trace with hash -820834069, now seen corresponding path program 5 times [2023-04-02 13:54:30,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:30,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673337809] [2023-04-02 13:54:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:30,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 13:54:31,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:31,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673337809] [2023-04-02 13:54:31,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673337809] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:31,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929969144] [2023-04-02 13:54:31,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:31,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:31,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:31,099 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 13:54:31,100 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 13:54:31,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 13:54:31,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:31,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 13:54:31,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-04-02 13:54:31,239 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 13:54:31,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929969144] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:31,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 13:54:31,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [27] total 30 [2023-04-02 13:54:31,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518241659] [2023-04-02 13:54:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:31,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 13:54:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:31,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 13:54:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2023-04-02 13:54:31,241 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 13:54:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:31,309 INFO L93 Difference]: Finished difference Result 108 states and 148 transitions. [2023-04-02 13:54:31,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:54:31,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 59 [2023-04-02 13:54:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:31,311 INFO L225 Difference]: With dead ends: 108 [2023-04-02 13:54:31,311 INFO L226 Difference]: Without dead ends: 97 [2023-04-02 13:54:31,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2023-04-02 13:54:31,312 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:31,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-04-02 13:54:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2023-04-02 13:54:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:54:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2023-04-02 13:54:31,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 59 [2023-04-02 13:54:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:31,333 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2023-04-02 13:54:31,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 13:54:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2023-04-02 13:54:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 13:54:31,334 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:31,334 INFO L195 NwaCegarLoop]: trace histogram [24, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:31,343 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 13:54:31,539 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 13:54:31,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:31,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash -123542629, now seen corresponding path program 6 times [2023-04-02 13:54:31,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:31,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199937159] [2023-04-02 13:54:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:31,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-02 13:54:32,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:32,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199937159] [2023-04-02 13:54:32,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199937159] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:32,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840918553] [2023-04-02 13:54:32,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:32,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:32,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:32,122 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 13:54:32,147 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 13:54:32,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:32,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:32,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 13:54:32,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-04-02 13:54:32,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-04-02 13:54:32,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840918553] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:32,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177960910] [2023-04-02 13:54:32,582 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 13:54:32,582 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:32,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:32,582 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:32,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:32,615 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:32,767 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:32,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:32,783 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:33,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3070#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int)) (and (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) 4) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) 0)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_5|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:33,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:33,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:33,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 39 [2023-04-02 13:54:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146535602] [2023-04-02 13:54:33,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:33,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 13:54:33,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:33,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 13:54:33,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1988, Unknown=0, NotChecked=0, Total=2756 [2023-04-02 13:54:33,418 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 39 states have internal predecessors, (88), 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 13:54:34,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:34,212 INFO L93 Difference]: Finished difference Result 236 states and 350 transitions. [2023-04-02 13:54:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-04-02 13:54:34,213 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 39 states have internal predecessors, (88), 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 60 [2023-04-02 13:54:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:34,214 INFO L225 Difference]: With dead ends: 236 [2023-04-02 13:54:34,214 INFO L226 Difference]: Without dead ends: 177 [2023-04-02 13:54:34,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1468, Invalid=4538, Unknown=0, NotChecked=0, Total=6006 [2023-04-02 13:54:34,217 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 147 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:34,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 130 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:54:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-04-02 13:54:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 126. [2023-04-02 13:54:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.3333333333333333) internal successors, (160), 120 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:54:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 165 transitions. [2023-04-02 13:54:34,265 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 165 transitions. Word has length 60 [2023-04-02 13:54:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:34,265 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 165 transitions. [2023-04-02 13:54:34,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 39 states have internal predecessors, (88), 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 13:54:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 165 transitions. [2023-04-02 13:54:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 13:54:34,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:34,267 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:34,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:34,475 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 13:54:34,475 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:34,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:34,475 INFO L85 PathProgramCache]: Analyzing trace with hash 742050715, now seen corresponding path program 7 times [2023-04-02 13:54:34,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:34,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218119721] [2023-04-02 13:54:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:34,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2023-04-02 13:54:35,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:35,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218119721] [2023-04-02 13:54:35,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218119721] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:35,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866992743] [2023-04-02 13:54:35,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:54:35,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:35,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:35,759 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 13:54:35,762 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 13:54:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:35,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-02 13:54:35,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2023-04-02 13:54:35,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2023-04-02 13:54:37,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866992743] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:37,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113390416] [2023-04-02 13:54:37,604 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 13:54:37,604 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:37,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:37,604 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:37,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:37,626 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:37,757 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:37,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:37,769 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:38,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4616#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_6| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_6|) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) 4)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_6|))) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:38,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:38,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:38,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2023-04-02 13:54:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448494407] [2023-04-02 13:54:38,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:38,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-04-02 13:54:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:38,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-04-02 13:54:38,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2989, Invalid=5201, Unknown=0, NotChecked=0, Total=8190 [2023-04-02 13:54:38,456 INFO L87 Difference]: Start difference. First operand 126 states and 165 transitions. Second operand has 77 states, 77 states have (on average 1.155844155844156) internal successors, (89), 77 states have internal predecessors, (89), 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 13:54:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:39,649 INFO L93 Difference]: Finished difference Result 591 states and 896 transitions. [2023-04-02 13:54:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-04-02 13:54:39,650 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.155844155844156) internal successors, (89), 77 states have internal predecessors, (89), 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 122 [2023-04-02 13:54:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:39,653 INFO L225 Difference]: With dead ends: 591 [2023-04-02 13:54:39,653 INFO L226 Difference]: Without dead ends: 507 [2023-04-02 13:54:39,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2989, Invalid=5201, Unknown=0, NotChecked=0, Total=8190 [2023-04-02 13:54:39,656 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1408 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:39,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1446 Valid, 199 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 13:54:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-04-02 13:54:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 164. [2023-04-02 13:54:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.2531645569620253) internal successors, (198), 158 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:54:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2023-04-02 13:54:39,735 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 122 [2023-04-02 13:54:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:39,735 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2023-04-02 13:54:39,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.155844155844156) internal successors, (89), 77 states have internal predecessors, (89), 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 13:54:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2023-04-02 13:54:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-02 13:54:39,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:39,743 INFO L195 NwaCegarLoop]: trace histogram [74, 35, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:39,751 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 13:54:39,949 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 13:54:39,949 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:39,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash -778212549, now seen corresponding path program 8 times [2023-04-02 13:54:39,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:39,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954281834] [2023-04-02 13:54:39,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:39,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2023-04-02 13:54:43,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:43,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954281834] [2023-04-02 13:54:43,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954281834] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:43,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692458908] [2023-04-02 13:54:43,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:43,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:43,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:43,609 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 13:54:43,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 13:54:43,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 13:54:43,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:43,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:54:43,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 3965 trivial. 0 not checked. [2023-04-02 13:54:43,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 3965 trivial. 0 not checked. [2023-04-02 13:54:44,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692458908] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:44,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419300347] [2023-04-02 13:54:44,097 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 13:54:44,097 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:44,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:44,097 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:44,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:44,110 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:44,247 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:54:44,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:44,260 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:45,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7082#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_7| Int)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_7|) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) 4)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_7|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_7|)))) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:45,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:45,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 6, 6] total 84 [2023-04-02 13:54:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748132529] [2023-04-02 13:54:45,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:45,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-04-02 13:54:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:45,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-04-02 13:54:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=6266, Unknown=0, NotChecked=0, Total=9506 [2023-04-02 13:54:45,196 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:55:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:55:07,080 INFO L93 Difference]: Finished difference Result 4034 states and 6132 transitions. [2023-04-02 13:55:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2023-04-02 13:55:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2023-04-02 13:55:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:55:07,097 INFO L225 Difference]: With dead ends: 4034 [2023-04-02 13:55:07,098 INFO L226 Difference]: Without dead ends: 3875 [2023-04-02 13:55:07,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76981 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=45655, Invalid=174775, Unknown=0, NotChecked=0, Total=220430 [2023-04-02 13:55:07,118 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1643 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 1417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1417 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:55:07,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1643 Valid, 116 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1417 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 13:55:07,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2023-04-02 13:55:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 395. [2023-04-02 13:55:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 389 states have (on average 1.588688946015424) internal successors, (618), 389 states have internal predecessors, (618), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:55:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 623 transitions. [2023-04-02 13:55:07,438 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 623 transitions. Word has length 160 [2023-04-02 13:55:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:55:07,438 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 623 transitions. [2023-04-02 13:55:07,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:55:07,439 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 623 transitions. [2023-04-02 13:55:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-04-02 13:55:07,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:55:07,444 INFO L195 NwaCegarLoop]: trace histogram [151, 76, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:55:07,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 13:55:07,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:55:07,650 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:55:07,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:55:07,651 INFO L85 PathProgramCache]: Analyzing trace with hash -859527317, now seen corresponding path program 9 times [2023-04-02 13:55:07,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:55:07,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882001852] [2023-04-02 13:55:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:55:07,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:55:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:55:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 28275 trivial. 0 not checked. [2023-04-02 13:55:13,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:55:13,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882001852] [2023-04-02 13:55:13,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882001852] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:55:13,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453992305] [2023-04-02 13:55:13,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:55:13,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:55:13,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:55:13,257 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:55:13,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 13:55:13,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:55:13,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:55:13,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 2042 conjuncts, 78 conjunts are in the unsatisfiable core [2023-04-02 13:55:13,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:55:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 28045 refuted. 0 times theorem prover too weak. 3156 trivial. 0 not checked. [2023-04-02 13:55:14,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:55:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 28045 refuted. 0 times theorem prover too weak. 3156 trivial. 0 not checked. [2023-04-02 13:55:19,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453992305] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:55:19,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1791540904] [2023-04-02 13:55:19,857 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 13:55:19,857 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:55:19,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:55:19,857 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:55:19,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:55:19,869 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:55:20,022 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:55:20,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:55:20,034 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:55:20,970 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19100#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_8| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_8|) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_8|) 4)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_8|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_8|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:55:20,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:55:20,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:55:20,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 156 [2023-04-02 13:55:20,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785462596] [2023-04-02 13:55:20,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:55:20,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2023-04-02 13:55:20,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:55:20,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2023-04-02 13:55:20,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12000, Invalid=16730, Unknown=0, NotChecked=0, Total=28730 [2023-04-02 13:55:20,979 INFO L87 Difference]: Start difference. First operand 395 states and 623 transitions. Second operand has 156 states, 156 states have (on average 3.5) internal successors, (546), 156 states have internal predecessors, (546), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:55:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:55:56,978 INFO L93 Difference]: Finished difference Result 34763 states and 60723 transitions. [2023-04-02 13:55:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2023-04-02 13:55:56,979 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 3.5) internal successors, (546), 156 states have internal predecessors, (546), 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 391 [2023-04-02 13:55:56,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:55:57,096 INFO L225 Difference]: With dead ends: 34763 [2023-04-02 13:55:57,096 INFO L226 Difference]: Without dead ends: 34373 [2023-04-02 13:55:57,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1328 GetRequests, 1083 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9747 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=18160, Invalid=42602, Unknown=0, NotChecked=0, Total=60762 [2023-04-02 13:55:57,114 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 314 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 13:55:57,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 91 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 13:55:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34373 states. [2023-04-02 13:56:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34373 to 626. [2023-04-02 13:56:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 620 states have (on average 1.4935483870967743) internal successors, (926), 620 states have internal predecessors, (926), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:56:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 931 transitions. [2023-04-02 13:56:00,010 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 931 transitions. Word has length 391 [2023-04-02 13:56:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:56:00,010 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 931 transitions. [2023-04-02 13:56:00,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 3.5) internal successors, (546), 156 states have internal predecessors, (546), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:56:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 931 transitions. [2023-04-02 13:56:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2023-04-02 13:56:00,022 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:56:00,022 INFO L195 NwaCegarLoop]: trace histogram [153, 152, 152, 151, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:56:00,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 13:56:00,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 13:56:00,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:56:00,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:56:00,232 INFO L85 PathProgramCache]: Analyzing trace with hash 144668060, now seen corresponding path program 10 times [2023-04-02 13:56:00,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:56:00,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520823890] [2023-04-02 13:56:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:56:00,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:56:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:56:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2023-04-02 13:56:16,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:56:16,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520823890] [2023-04-02 13:56:16,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520823890] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:56:16,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11147856] [2023-04-02 13:56:16,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:56:16,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:56:16,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:56:16,109 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 13:56:16,113 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 13:56:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:56:16,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 3274 conjuncts, 155 conjunts are in the unsatisfiable core [2023-04-02 13:56:16,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:56:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2023-04-02 13:56:16,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:56:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2023-04-02 13:56:39,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11147856] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:56:39,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857136935] [2023-04-02 13:56:39,206 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 13:56:39,206 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:56:39,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:56:39,206 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:56:39,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:56:39,216 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:56:39,322 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 13:56:39,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:56:39,333 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:56:40,806 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93986#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_9| Int)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_9|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_9|) (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_9|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_9|) 4)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_9|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:56:40,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:56:40,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:56:40,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156, 156] total 311 [2023-04-02 13:56:40,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61167804] [2023-04-02 13:56:40,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:56:40,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 311 states [2023-04-02 13:56:40,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:56:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 311 interpolants. [2023-04-02 13:56:40,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48268, Invalid=57032, Unknown=0, NotChecked=0, Total=105300 [2023-04-02 13:56:40,822 INFO L87 Difference]: Start difference. First operand 626 states and 931 transitions. Second operand has 311 states, 311 states have (on average 1.0385852090032155) internal successors, (323), 311 states have internal predecessors, (323), 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)