/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/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:07:00,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:07:00,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:07:00,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:07:00,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:07:00,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:07:00,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:07:00,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:07:00,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:07:00,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:07:00,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:07:00,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:07:00,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:07:00,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:07:00,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:07:00,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:07:00,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:07:00,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:07:00,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:07:00,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:07:00,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:07:00,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:07:00,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:07:00,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:07:00,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 22:07:00,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:07:00,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:07:00,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:07:00,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:07:00,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:07:00,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:07:00,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:07:00,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:07:00,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:07:00,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:07:00,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:07:00,891 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 22:07:00,921 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:07:00,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:07:00,922 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:07:00,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:07:00,923 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:07:00,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:07:00,923 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:07:00,923 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:07:00,923 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:07:00,923 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:07:00,924 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:07:00,924 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:07:00,924 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:07:00,925 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:07:00,925 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:07:00,925 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:07:00,925 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:07:00,925 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:07:00,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:07:00,926 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:07:00,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:07:00,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:07:00,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:07:00,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:07:00,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:07:00,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:07:00,927 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:07:00,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:07:00,928 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:07:00,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:07:00,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:07:00,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:07:00,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:07:00,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:07:00,929 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:07:00,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:07:00,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:07:00,929 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:07:00,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:07:00,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:07:00,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:07:00,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:07:01,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:07:01,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:07:01,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:07:01,154 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:07:01,155 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:07:01,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i [2023-04-02 22:07:02,253 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:07:02,423 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:07:02,424 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_3.i [2023-04-02 22:07:02,428 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd0a678eb/78e8d065f99244d79d745415c43b82d9/FLAG3795262f4 [2023-04-02 22:07:02,441 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd0a678eb/78e8d065f99244d79d745415c43b82d9 [2023-04-02 22:07:02,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:07:02,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:07:02,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:07:02,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:07:02,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:07:02,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c8a7709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02, skipping insertion in model container [2023-04-02 22:07:02,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:07:02,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:07:02,610 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/loop-crafted/simple_array_index_value_3.i[920,933] [2023-04-02 22:07:02,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:07:02,633 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:07:02,646 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/loop-crafted/simple_array_index_value_3.i[920,933] [2023-04-02 22:07:02,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:07:02,661 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:07:02,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02 WrapperNode [2023-04-02 22:07:02,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:07:02,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:07:02,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:07:02,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:07:02,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,683 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:07:02,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:07:02,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:07:02,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:07:02,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02" (1/1) ... [2023-04-02 22:07:02,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:07:02,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:07:02,710 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 22:07:02,718 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 22:07:02,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:07:02,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:07:02,749 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:07:02,754 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:07:02,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:07:02,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:07:02,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:07:02,755 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:07:02,755 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 22:07:02,755 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 22:07:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:07:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:07:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:07:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:07:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:07:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 22:07:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:07:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:07:02,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:07:02,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:07:02,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:07:02,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:07:02,848 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:07:02,850 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:07:03,134 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:07:03,168 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:07:03,169 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:07:03,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:07:03 BoogieIcfgContainer [2023-04-02 22:07:03,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:07:03,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:07:03,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:07:03,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:07:03,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:07:02" (1/3) ... [2023-04-02 22:07:03,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187beb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:07:03, skipping insertion in model container [2023-04-02 22:07:03,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:07:02" (2/3) ... [2023-04-02 22:07:03,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187beb7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:07:03, skipping insertion in model container [2023-04-02 22:07:03,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:07:03" (3/3) ... [2023-04-02 22:07:03,177 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2023-04-02 22:07:03,190 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:07:03,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:07:03,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:07:03,234 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;@7715e7fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:07:03,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:07:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 22:07:03,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 22:07:03,244 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:07:03,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:07:03,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:07:03,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:07:03,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1172449209, now seen corresponding path program 1 times [2023-04-02 22:07:03,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:07:03,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106491053] [2023-04-02 22:07:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:07:03,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:07:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:07:03,528 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 22:07:03,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:07:03,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106491053] [2023-04-02 22:07:03,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106491053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:07:03,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:07:03,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:07:03,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139010519] [2023-04-02 22:07:03,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:07:03,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:07:03,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:07:03,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:07:03,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:07:03,561 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 22:07:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:07:03,600 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-04-02 22:07:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:07:03,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2023-04-02 22:07:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:07:03,608 INFO L225 Difference]: With dead ends: 34 [2023-04-02 22:07:03,609 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 22:07:03,611 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 22:07:03,614 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:07:03,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:07:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 22:07:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2023-04-02 22:07:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 22:07:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-02 22:07:03,644 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-04-02 22:07:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:07:03,644 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-02 22:07:03,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 22:07:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-02 22:07:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 22:07:03,645 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:07:03,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:07:03,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:07:03,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:07:03,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:07:03,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1315783267, now seen corresponding path program 1 times [2023-04-02 22:07:03,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:07:03,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525083898] [2023-04-02 22:07:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:07:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:07:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:07:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:07:03,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:07:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525083898] [2023-04-02 22:07:03,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525083898] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:07:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082039747] [2023-04-02 22:07:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:07:03,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:07:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:07:03,821 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 22:07:03,846 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 22:07:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:07:03,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 22:07:03,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:07:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:07:03,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:07:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:07:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082039747] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:07:04,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969814616] [2023-04-02 22:07:04,048 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:07:04,049 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:07:04,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:07:04,056 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:07:04,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:07:04,159 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 22:07:04,439 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 61 for LOIs [2023-04-02 22:07:04,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:07:04,548 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:07:05,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '173#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#array~0.base_BEFORE_CALL_1| Int) (v_main_~index~0_29 Int)) (and (<= 1 (+ v_main_~index~0_29 |#StackHeapBarrier|)) (<= 2 (+ |v_main_~#array~0.base_BEFORE_CALL_1| v_main_~index~0_29)) (not (= (mod (select (select |#memory_int| |v_main_~#array~0.base_BEFORE_CALL_1|) 0) 4294967296) 0)) (<= 2 |v_main_~#array~0.base_BEFORE_CALL_1|) (<= 0 v_main_~index~0_29) (<= 10000 (mod v_main_~index~0_29 4294967296)) (<= 3 (+ |v_main_~#array~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#array~0.base_BEFORE_CALL_1|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:07:05,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:07:05,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:07:05,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 22:07:05,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308513723] [2023-04-02 22:07:05,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:07:05,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 22:07:05,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:07:05,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 22:07:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-02 22:07:05,024 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 22:07:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:07:05,168 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2023-04-02 22:07:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:07:05,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 12 [2023-04-02 22:07:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:07:05,171 INFO L225 Difference]: With dead ends: 38 [2023-04-02 22:07:05,171 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 22:07:05,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-04-02 22:07:05,173 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:07:05,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:07:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 22:07:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2023-04-02 22:07:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 22:07:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-02 22:07:05,185 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2023-04-02 22:07:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:07:05,186 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-02 22:07:05,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 22:07:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-02 22:07:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 22:07:05,187 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:07:05,187 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:07:05,202 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 22:07:05,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:07:05,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:07:05,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:07:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1658289607, now seen corresponding path program 2 times [2023-04-02 22:07:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:07:05,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166395511] [2023-04-02 22:07:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:07:05,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:07:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:07:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:07:05,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:07:05,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166395511] [2023-04-02 22:07:05,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166395511] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:07:05,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198750049] [2023-04-02 22:07:05,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:07:05,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:07:05,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:07:05,657 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 22:07:05,665 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 22:07:05,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:07:05,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:07:05,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 22:07:05,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:07:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:07:05,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:07:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:07:05,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198750049] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:07:05,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229731919] [2023-04-02 22:07:05,840 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:07:05,840 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:07:05,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:07:05,840 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:07:05,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:07:05,861 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 22:07:05,967 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 61 for LOIs [2023-04-02 22:07:06,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:07:06,034 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:07:06,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '376#(and (<= 1 |#StackHeapBarrier|) (exists ((v_main_~index~0_42 Int) (|v_main_~#array~0.base_BEFORE_CALL_2| Int)) (and (<= 2 (+ |v_main_~#array~0.base_BEFORE_CALL_2| v_main_~index~0_42)) (<= 3 (+ |v_main_~#array~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= 1 (+ v_main_~index~0_42 |#StackHeapBarrier|)) (<= 10000 (mod v_main_~index~0_42 4294967296)) (not (= (mod (select (select |#memory_int| |v_main_~#array~0.base_BEFORE_CALL_2|) 0) 4294967296) 0)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#array~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#array~0.base_BEFORE_CALL_2|) (<= 0 v_main_~index~0_42))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:07:06,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:07:06,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:07:06,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 22:07:06,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984382117] [2023-04-02 22:07:06,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:07:06,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 22:07:06,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:07:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 22:07:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-04-02 22:07:06,518 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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 22:07:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:07:07,038 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-04-02 22:07:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 22:07:07,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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 15 [2023-04-02 22:07:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:07:07,040 INFO L225 Difference]: With dead ends: 62 [2023-04-02 22:07:07,040 INFO L226 Difference]: Without dead ends: 53 [2023-04-02 22:07:07,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:07:07,041 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:07:07,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 136 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:07:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-02 22:07:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 25. [2023-04-02 22:07:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 22:07:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-02 22:07:07,049 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2023-04-02 22:07:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:07:07,049 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-02 22:07:07,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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 22:07:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-02 22:07:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 22:07:07,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:07:07,050 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:07:07,068 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 22:07:07,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 22:07:07,268 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:07:07,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:07:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1525173767, now seen corresponding path program 3 times [2023-04-02 22:07:07,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:07:07,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608318656] [2023-04-02 22:07:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:07:07,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:07:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:07:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:07:07,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:07:07,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608318656] [2023-04-02 22:07:07,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608318656] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:07:07,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962810214] [2023-04-02 22:07:07,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:07:07,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:07:07,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:07:07,651 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 22:07:07,655 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 22:07:08,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:07:08,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:07:08,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-02 22:07:08,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:07:08,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 22:07:08,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 22:07:08,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 22:07:08,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 22:07:08,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 22:07:08,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 22:07:08,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 22:07:08,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 22:07:08,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 22:07:08,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 22:07:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:07:08,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:07:13,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 115 [2023-04-02 22:07:14,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25290914906094 treesize of output 25288767422446 [2023-04-02 22:08:05,050 WARN L223 SmtUtils]: Spent 50.60s on a formula simplification. DAG size of input: 52109 DAG size of output: 230 (called from [L 809] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-04-02 22:08:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:08:07,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962810214] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:08:07,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [451271845] [2023-04-02 22:08:07,141 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:08:07,141 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:08:07,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:08:07,142 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:08:07,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:08:07,157 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 22:08:07,226 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 61 for LOIs [2023-04-02 22:08:07,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:08:07,258 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:08:08,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '704#(and (<= 1 |#StackHeapBarrier|) (exists ((v_main_~index~0_66 Int) (|v_main_~#array~0.base_BEFORE_CALL_3| Int)) (and (<= 2 (+ |v_main_~#array~0.base_BEFORE_CALL_3| v_main_~index~0_66)) (<= 2 |v_main_~#array~0.base_BEFORE_CALL_3|) (<= 3 (+ |v_main_~#array~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= 10000 (mod v_main_~index~0_66 4294967296)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#array~0.base_BEFORE_CALL_3|) (not (= (mod (select (select |#memory_int| |v_main_~#array~0.base_BEFORE_CALL_3|) 0) 4294967296) 0)) (<= 0 v_main_~index~0_66) (<= 1 (+ v_main_~index~0_66 |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:08:08,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:08:08,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:08:08,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 42 [2023-04-02 22:08:08,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616398141] [2023-04-02 22:08:08,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:08:08,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-02 22:08:08,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:08:08,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-02 22:08:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2359, Unknown=0, NotChecked=0, Total=2652 [2023-04-02 22:08:08,354 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:08:09,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:08:09,963 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2023-04-02 22:08:09,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 22:08:09,964 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (5), 4 states have call predecessors, (5), 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 22:08:09,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:08:09,966 INFO L225 Difference]: With dead ends: 75 [2023-04-02 22:08:09,966 INFO L226 Difference]: Without dead ends: 66 [2023-04-02 22:08:09,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=354, Invalid=2726, Unknown=0, NotChecked=0, Total=3080 [2023-04-02 22:08:09,968 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 90 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 22:08:09,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 199 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 22:08:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-02 22:08:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 32. [2023-04-02 22:08:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:08:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-04-02 22:08:09,980 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 21 [2023-04-02 22:08:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:08:09,981 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-04-02 22:08:09,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:08:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-04-02 22:08:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 22:08:09,982 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:08:09,982 INFO L195 NwaCegarLoop]: trace histogram [11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:08:09,989 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 22:08:10,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:08:10,189 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:08:10,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:08:10,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1223724284, now seen corresponding path program 1 times [2023-04-02 22:08:10,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:08:10,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702189021] [2023-04-02 22:08:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:08:10,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:08:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:08:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:08:10,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:08:10,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702189021] [2023-04-02 22:08:10,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702189021] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:08:10,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646275363] [2023-04-02 22:08:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:08:10,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:08:10,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:08:10,497 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 22:08:10,512 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 22:08:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:08:11,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 88 conjunts are in the unsatisfiable core [2023-04-02 22:08:11,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:08:11,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 22:08:11,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-02 22:08:11,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 22:08:11,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-04-02 22:08:11,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 22:08:11,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 22:08:12,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 22:08:12,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 22:08:12,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 22:08:12,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 22:08:12,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 22:08:12,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 22:08:12,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 22:08:12,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 22:08:12,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 22:08:12,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 22:08:12,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 22:08:12,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 22:08:12,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 22:08:12,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 22:08:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:08:12,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:08:32,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 261 [2023-04-02 22:08:33,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12350127579 treesize of output 12349079003 [2023-04-02 22:09:41,177 WARN L223 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 77111 DAG size of output: 443 (called from [L 809] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-04-02 22:11:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:11:17,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646275363] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:11:17,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [635244766] [2023-04-02 22:11:17,022 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 22:11:17,022 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:11:17,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:11:17,023 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:11:17,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:11:17,044 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 22:11:17,371 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-02 22:11:17,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:11:17,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:11:24,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1120#(and (exists ((|v_main_~#array~0.base_BEFORE_CALL_12| Int) (|v_main_~#array~0.offset_BEFORE_CALL_12| Int) (v_main_~index~0_BEFORE_CALL_12 Int) (v_main_~tmp~0_BEFORE_CALL_10 Int)) (and (< (mod v_main_~index~0_BEFORE_CALL_12 4294967296) 10000) (not (= (mod (select (select |#memory_int| |v_main_~#array~0.base_BEFORE_CALL_12|) (+ (* 4 (mod v_main_~index~0_BEFORE_CALL_12 4294967296)) |v_main_~#array~0.offset_BEFORE_CALL_12|)) 4294967296) (* 2 (mod v_main_~index~0_BEFORE_CALL_12 2147483648)))) (not (= (mod (select (select |#memory_int| |v_main_~#array~0.base_BEFORE_CALL_12|) (+ (* 4 (mod v_main_~index~0_BEFORE_CALL_12 4294967296)) |v_main_~#array~0.offset_BEFORE_CALL_12|)) 4294967296) 0)) (or (and (<= 1 |#StackHeapBarrier|) (<= 0 v_main_~tmp~0_BEFORE_CALL_10) (= v_main_~index~0_BEFORE_CALL_12 0) (= |v_main_~#array~0.offset_BEFORE_CALL_12| 0) (<= (+ |#StackHeapBarrier| 1) |v_main_~#array~0.base_BEFORE_CALL_12|) (<= 2 (+ v_main_~tmp~0_BEFORE_CALL_10 |v_main_~#array~0.base_BEFORE_CALL_12|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#array~0.base_BEFORE_CALL_12|)) (<= 2 |v_main_~#array~0.base_BEFORE_CALL_12|) (= |#NULL.offset| 0) (<= 1 (+ v_main_~tmp~0_BEFORE_CALL_10 |#StackHeapBarrier|)) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (<= 0 v_main_~tmp~0_BEFORE_CALL_10) (<= 1 (+ v_main_~index~0_BEFORE_CALL_12 v_main_~tmp~0_BEFORE_CALL_10)) (= |v_main_~#array~0.offset_BEFORE_CALL_12| 0) (<= 1 v_main_~index~0_BEFORE_CALL_12) (<= 2 (+ v_main_~index~0_BEFORE_CALL_12 |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#array~0.base_BEFORE_CALL_12|) (<= 2 (+ v_main_~tmp~0_BEFORE_CALL_10 |v_main_~#array~0.base_BEFORE_CALL_12|)) (<= 3 (+ v_main_~index~0_BEFORE_CALL_12 |v_main_~#array~0.base_BEFORE_CALL_12|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#array~0.base_BEFORE_CALL_12|)) (<= 2 |v_main_~#array~0.base_BEFORE_CALL_12|) (= |#NULL.offset| 0) (<= 1 (+ v_main_~tmp~0_BEFORE_CALL_10 |#StackHeapBarrier|)) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:11:24,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:11:24,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:11:24,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 20] total 51 [2023-04-02 22:11:24,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847681770] [2023-04-02 22:11:24,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:11:24,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 22:11:24,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:11:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 22:11:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=3430, Unknown=3, NotChecked=0, Total=3782 [2023-04-02 22:11:24,999 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 48 states have internal predecessors, (61), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 22:11:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:11:32,983 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2023-04-02 22:11:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-02 22:11:32,984 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.22) internal successors, (61), 48 states have internal predecessors, (61), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-04-02 22:11:32,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:11:32,985 INFO L225 Difference]: With dead ends: 92 [2023-04-02 22:11:32,985 INFO L226 Difference]: Without dead ends: 77 [2023-04-02 22:11:32,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=641, Invalid=5518, Unknown=3, NotChecked=0, Total=6162 [2023-04-02 22:11:32,987 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 75 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:11:32,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 494 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-04-02 22:11:32,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-02 22:11:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2023-04-02 22:11:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 22:11:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-04-02 22:11:33,001 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 29 [2023-04-02 22:11:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:11:33,002 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-04-02 22:11:33,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.22) internal successors, (61), 48 states have internal predecessors, (61), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 22:11:33,002 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-04-02 22:11:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-02 22:11:33,003 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:11:33,003 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:11:33,009 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 22:11:33,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:11:33,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:11:33,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:11:33,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1225384601, now seen corresponding path program 2 times [2023-04-02 22:11:33,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:11:33,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523754995] [2023-04-02 22:11:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:11:33,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:11:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:11:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 22:11:33,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:11:33,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523754995] [2023-04-02 22:11:33,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523754995] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:11:33,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121439148] [2023-04-02 22:11:33,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:11:33,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:11:33,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:11:33,649 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 22:11:33,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process