/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 EqDomain -i ../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:41:08,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:41:08,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:41:08,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 08:41:08,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:41:08,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:41:08,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:41:08,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:41:08,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:41:08,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:41:08,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:41:08,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:41:08,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:41:08,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:41:08,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:41:08,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:41:08,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 08:41:08,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:41:08,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:41:08,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:41:08,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:41:08,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:41:08,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:41:08,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:41:08,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:41:08,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:41:08,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:41:08,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:41:08,111 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 [2023-04-01 08:41:08,143 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:41:08,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:41:08,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:41:08,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:41:08,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:41:08,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:41:08,144 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:41:08,144 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:41:08,146 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:41:08,146 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:41:08,147 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:41:08,147 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:41:08,147 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:41:08,147 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:41:08,147 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:41:08,148 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:41:08,148 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:41:08,148 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:41:08,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:41:08,149 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:41:08,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:41:08,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:41:08,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:41:08,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:41:08,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:41:08,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:41:08,150 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:41:08,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:41:08,150 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:41:08,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:41:08,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:41:08,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:41:08,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:41:08,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:41:08,151 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:41:08,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:41:08,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:41:08,151 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:41:08,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:41:08,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:41:08,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:41:08,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:41:08,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:41:08,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:41:08,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:41:08,398 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:41:08,399 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:41:08,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2023-04-01 08:41:09,569 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:41:09,746 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:41:09,746 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2023-04-01 08:41:09,751 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b509ace/b473a83c21da4205bb87db5f2aae7c14/FLAGc42b77099 [2023-04-01 08:41:09,763 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b509ace/b473a83c21da4205bb87db5f2aae7c14 [2023-04-01 08:41:09,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:41:09,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:41:09,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:41:09,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:41:09,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:41:09,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:09,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ddcacc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09, skipping insertion in model container [2023-04-01 08:41:09,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:09,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:41:09,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:41:09,924 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_copy3_ground-1.i[816,829] [2023-04-01 08:41:09,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:41:09,947 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:41:09,958 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_copy3_ground-1.i[816,829] [2023-04-01 08:41:09,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:41:09,976 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:41:09,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09 WrapperNode [2023-04-01 08:41:09,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:41:09,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:41:09,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:41:09,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:41:09,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:09,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:09,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:09,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:09,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:10,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:10,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:10,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:10,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:41:10,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:41:10,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:41:10,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:41:10,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09" (1/1) ... [2023-04-01 08:41:10,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:41:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:10,042 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) [2023-04-01 08:41:10,046 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 [2023-04-01 08:41:10,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:41:10,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:41:10,073 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:41:10,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:41:10,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:41:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:41:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:41:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:41:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:41:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:41:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:41:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:41:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:41:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:41:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:41:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:41:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:41:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:41:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:41:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:41:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:41:10,135 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:41:10,137 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:41:10,343 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:41:10,410 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:41:10,410 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 08:41:10,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:41:10 BoogieIcfgContainer [2023-04-01 08:41:10,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:41:10,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:41:10,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:41:10,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:41:10,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:41:09" (1/3) ... [2023-04-01 08:41:10,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5fdfa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:41:10, skipping insertion in model container [2023-04-01 08:41:10,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:41:09" (2/3) ... [2023-04-01 08:41:10,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5fdfa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:41:10, skipping insertion in model container [2023-04-01 08:41:10,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:41:10" (3/3) ... [2023-04-01 08:41:10,419 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2023-04-01 08:41:10,440 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:41:10,440 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:41:10,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:41:10,487 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;@261d47fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:41:10,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:41:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:41:10,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 08:41:10,498 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:10,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:10,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:10,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash 529382403, now seen corresponding path program 1 times [2023-04-01 08:41:10,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:10,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17611718] [2023-04-01 08:41:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:10,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:41:10,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:10,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17611718] [2023-04-01 08:41:10,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17611718] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:41:10,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:41:10,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:41:10,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050463324] [2023-04-01 08:41:10,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:41:10,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:41:10,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:41:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:41:10,779 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) 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) [2023-04-01 08:41:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:10,830 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-04-01 08:41:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:41:10,833 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 [2023-04-01 08:41:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:10,838 INFO L225 Difference]: With dead ends: 37 [2023-04-01 08:41:10,838 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 08:41:10,840 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 [2023-04-01 08:41:10,844 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:10,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:41:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 08:41:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 08:41:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:41:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-04-01 08:41:10,882 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2023-04-01 08:41:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:10,883 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-04-01 08:41:10,883 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) [2023-04-01 08:41:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-04-01 08:41:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 08:41:10,885 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:10,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:10,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:41:10,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:10,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:10,889 INFO L85 PathProgramCache]: Analyzing trace with hash -831563118, now seen corresponding path program 1 times [2023-04-01 08:41:10,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:10,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087439695] [2023-04-01 08:41:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:10,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:41:11,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:11,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087439695] [2023-04-01 08:41:11,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087439695] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:41:11,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033912893] [2023-04-01 08:41:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:11,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:11,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:11,040 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) [2023-04-01 08:41:11,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:41:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:11,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 08:41:11,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:41:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:41:11,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:41:11,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033912893] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:41:11,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:41:11,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 08:41:11,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471177165] [2023-04-01 08:41:11,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:41:11,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:41:11,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:41:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:41:11,184 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2023-04-01 08:41:11,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:11,216 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2023-04-01 08:41:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:41:11,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2023-04-01 08:41:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:11,217 INFO L225 Difference]: With dead ends: 33 [2023-04-01 08:41:11,218 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 08:41:11,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:41:11,219 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:11,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:41:11,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 08:41:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 08:41:11,223 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) [2023-04-01 08:41:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 08:41:11,224 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2023-04-01 08:41:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:11,224 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 08:41:11,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2023-04-01 08:41:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 08:41:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 08:41:11,225 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:11,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:11,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:41:11,434 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 [2023-04-01 08:41:11,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:11,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:11,435 INFO L85 PathProgramCache]: Analyzing trace with hash 800798871, now seen corresponding path program 1 times [2023-04-01 08:41:11,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:11,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144858890] [2023-04-01 08:41:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:11,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 08:41:11,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:11,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144858890] [2023-04-01 08:41:11,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144858890] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:41:11,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741403236] [2023-04-01 08:41:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:11,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:11,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:11,557 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) [2023-04-01 08:41:11,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:41:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:11,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:41:11,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:41:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 08:41:11,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:41:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 08:41:11,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741403236] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:41:11,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [713615258] [2023-04-01 08:41:11,747 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:41:11,748 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:41:11,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:41:11,755 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:41:11,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:41:11,894 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:41:12,814 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:41:12,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:41:12,872 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:41:13,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '362#(and (exists ((|v_main_~#a1~0.base_BEFORE_CALL_1| Int) (|v_old(#length)_BEFORE_CALL_1| (Array Int Int)) (|v_main_~#a4~0.base_BEFORE_CALL_1| Int) (|v_old(#memory_int)_BEFORE_CALL_1| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_1| (Array Int Int))) (and (not (= |v_old(#valid)_BEFORE_CALL_1| |v_old(#length)_BEFORE_CALL_1|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#valid)_BEFORE_CALL_1|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 0)) (not (= |v_main_~#a4~0.base_BEFORE_CALL_1| 0)) (= (select |v_old(#valid)_BEFORE_CALL_1| 1) 1) (not (= |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_1|)) (= (select |v_old(#length)_BEFORE_CALL_1| 2) 26) (= (select |v_old(#valid)_BEFORE_CALL_1| |v_main_~#a1~0.base_BEFORE_CALL_1|) 0) (not (= |v_main_~#a1~0.base_BEFORE_CALL_1| 1)) (= 2 (select |v_old(#length)_BEFORE_CALL_1| 1)) (not (= |v_main_~#a4~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_1| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#length)_BEFORE_CALL_1|)) (not (= 2 |v_main_~#a1~0.base_BEFORE_CALL_1|)) (= (select |v_old(#valid)_BEFORE_CALL_1| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 1) 0) (not (= (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_1|) 0))) (not (= |v_main_~#a1~0.base_BEFORE_CALL_1| 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:41:13,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:41:13,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:41:13,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:41:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507677589] [2023-04-01 08:41:13,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:41:13,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:41:13,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:41:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-04-01 08:41:13,651 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) [2023-04-01 08:41:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:13,692 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 08:41:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:41:13,693 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 [2023-04-01 08:41:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:13,694 INFO L225 Difference]: With dead ends: 40 [2023-04-01 08:41:13,695 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 08:41:13,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-04-01 08:41:13,696 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:13,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:41:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 08:41:13,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 08:41:13,701 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) [2023-04-01 08:41:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 08:41:13,705 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2023-04-01 08:41:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:13,706 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 08:41:13,706 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) [2023-04-01 08:41:13,706 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 08:41:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 08:41:13,708 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:13,708 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:13,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 08:41:13,914 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 [2023-04-01 08:41:13,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:13,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash 792809926, now seen corresponding path program 2 times [2023-04-01 08:41:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:13,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948514674] [2023-04-01 08:41:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:13,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:41:14,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:14,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948514674] [2023-04-01 08:41:14,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948514674] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:41:14,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768433085] [2023-04-01 08:41:14,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:41:14,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:14,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:14,066 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) [2023-04-01 08:41:14,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:41:14,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:41:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:41:14,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:41:14,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:41:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:41:14,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:41:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:41:14,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768433085] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:41:14,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615965483] [2023-04-01 08:41:14,171 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:41:14,172 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:41:14,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:41:14,172 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:41:14,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:41:14,205 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:41:14,625 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:41:14,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:41:14,663 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:41:15,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '612#(and (exists ((|v_main_~#a1~0.base_BEFORE_CALL_2| Int) (|v_old(#valid)_BEFORE_CALL_2| (Array Int Int)) (|v_main_~#a4~0.base_BEFORE_CALL_2| Int) (|v_old(#length)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_2| (Array Int (Array Int Int)))) (and (= 2 (select |v_old(#length)_BEFORE_CALL_2| 1)) (= (select |v_old(#valid)_BEFORE_CALL_2| |v_main_~#a1~0.base_BEFORE_CALL_2|) 0) (not (= |v_main_~#a4~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (= (select |v_old(#length)_BEFORE_CALL_2| 2) 26) (not (= |v_main_~#a1~0.base_BEFORE_CALL_2| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 1) 0) (not (= 2 |v_main_~#a1~0.base_BEFORE_CALL_2|)) (= (select |v_old(#valid)_BEFORE_CALL_2| 0) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 0)) (not (= |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_2|)) (not (= |v_old(#length)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| |v_old(#length)_BEFORE_CALL_2|)) (= (select |v_old(#valid)_BEFORE_CALL_2| 2) 1) (not (= |v_main_~#a1~0.base_BEFORE_CALL_2| 1)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_2|) 0))) (not (= |v_main_~#a4~0.base_BEFORE_CALL_2| 0)) (= (select |v_old(#valid)_BEFORE_CALL_2| 1) 1))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:41:15,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:41:15,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:41:15,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:41:15,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373055168] [2023-04-01 08:41:15,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:41:15,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:41:15,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:15,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:41:15,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-04-01 08:41:15,264 INFO L87 Difference]: Start difference. First operand 25 states and 29 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) [2023-04-01 08:41:15,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:15,318 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2023-04-01 08:41:15,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:41:15,319 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 21 [2023-04-01 08:41:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:15,319 INFO L225 Difference]: With dead ends: 47 [2023-04-01 08:41:15,319 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 08:41:15,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-04-01 08:41:15,321 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:15,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:41:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 08:41:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 08:41:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2023-04-01 08:41:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-04-01 08:41:15,326 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2023-04-01 08:41:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:15,326 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-04-01 08:41:15,326 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) [2023-04-01 08:41:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-04-01 08:41:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 08:41:15,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:15,327 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:15,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:41:15,533 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 [2023-04-01 08:41:15,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:15,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:15,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1473852803, now seen corresponding path program 3 times [2023-04-01 08:41:15,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:15,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456496406] [2023-04-01 08:41:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:15,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:41:15,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:15,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456496406] [2023-04-01 08:41:15,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456496406] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:41:15,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642211737] [2023-04-01 08:41:15,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:41:15,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:15,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:15,716 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) [2023-04-01 08:41:15,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:41:15,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:41:15,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:41:15,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:41:15,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:41:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:41:15,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:41:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:41:15,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642211737] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:41:15,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323563634] [2023-04-01 08:41:15,875 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:41:15,875 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:41:15,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:41:15,876 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:41:15,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:41:15,904 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:41:16,319 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:41:16,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:41:16,350 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:41:16,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '954#(and (exists ((|v_main_~#a1~0.base_BEFORE_CALL_3| Int) (|v_main_~#a4~0.base_BEFORE_CALL_3| Int) (|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int))) (and (not (= |v_main_~#a4~0.base_BEFORE_CALL_3| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= 0 (select |v_old(#valid)_BEFORE_CALL_3| |v_main_~#a1~0.base_BEFORE_CALL_3|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#length)_BEFORE_CALL_3| 2) 26) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_3|) 0))) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (not (= |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_3|)) (not (= 2 |v_main_~#a1~0.base_BEFORE_CALL_3|)) (not (= |v_main_~#a1~0.base_BEFORE_CALL_3| 1)) (not (= |v_main_~#a1~0.base_BEFORE_CALL_3| 0)) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (not (= |v_main_~#a4~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:41:16,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:41:16,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:41:16,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 08:41:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191358565] [2023-04-01 08:41:16,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:41:16,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 08:41:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 08:41:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-04-01 08:41:16,946 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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) [2023-04-01 08:41:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:16,990 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2023-04-01 08:41:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 08:41:16,990 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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 30 [2023-04-01 08:41:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:16,991 INFO L225 Difference]: With dead ends: 64 [2023-04-01 08:41:16,991 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 08:41:16,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-04-01 08:41:16,992 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:16,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:41:16,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 08:41:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-01 08:41:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 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) [2023-04-01 08:41:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-04-01 08:41:16,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2023-04-01 08:41:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:16,998 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-04-01 08:41:16,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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) [2023-04-01 08:41:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-04-01 08:41:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 08:41:16,999 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:16,999 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:17,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 08:41:17,205 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 [2023-04-01 08:41:17,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:17,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:17,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1069776093, now seen corresponding path program 4 times [2023-04-01 08:41:17,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:17,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641347747] [2023-04-01 08:41:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:17,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:41:17,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:17,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641347747] [2023-04-01 08:41:17,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641347747] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:41:17,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103181049] [2023-04-01 08:41:17,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:41:17,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:17,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:17,473 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) [2023-04-01 08:41:17,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 08:41:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:17,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:41:17,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:41:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:41:17,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:41:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:41:17,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103181049] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:41:17,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876817883] [2023-04-01 08:41:17,770 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:41:17,770 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:41:17,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:41:17,770 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:41:17,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:41:17,792 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:41:18,150 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:41:18,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:41:18,179 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:41:18,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1390#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_4| Int) (|v_main_~#a4~0.base_BEFORE_CALL_4| Int) (|v_old(#memory_int)_BEFORE_CALL_4| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_4| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_4| (Array Int Int))) (and (= (select |v_old(#length)_BEFORE_CALL_4| 1) 2) (not (= |v_main_~#a4~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (not (= |v_main_~#a1~0.base_BEFORE_CALL_4| 1)) (not (= 2 |v_main_~#a1~0.base_BEFORE_CALL_4|)) (= (select |v_old(#valid)_BEFORE_CALL_4| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_4| |v_main_~#a1~0.base_BEFORE_CALL_4|) 0) (= (select |v_old(#valid)_BEFORE_CALL_4| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_4| |v_old(#length)_BEFORE_CALL_4|)) (not (= |v_main_~#a1~0.base_BEFORE_CALL_4| 0)) (not (= |v_main_~#a4~0.base_BEFORE_CALL_4| 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_4| 1) |v_old(#length)_BEFORE_CALL_4|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_4| 1) 1) 0) (not (= (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_4|) 0))) (= (select |v_old(#length)_BEFORE_CALL_4| 2) 26) (not (= |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_4|)) (not (= |v_old(#valid)_BEFORE_CALL_4| (select |v_old(#memory_int)_BEFORE_CALL_4| 1))) (= (select |v_old(#valid)_BEFORE_CALL_4| 2) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_4| 1) 0)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:41:18,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:41:18,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:41:18,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 08:41:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785697877] [2023-04-01 08:41:18,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:41:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 08:41:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 08:41:18,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 08:41:18,795 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 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) [2023-04-01 08:41:18,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:18,861 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2023-04-01 08:41:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 08:41:18,862 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 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 36 [2023-04-01 08:41:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:18,862 INFO L225 Difference]: With dead ends: 76 [2023-04-01 08:41:18,862 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 08:41:18,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 08:41:18,864 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:18,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:41:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 08:41:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-04-01 08:41:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 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) [2023-04-01 08:41:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-04-01 08:41:18,870 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 36 [2023-04-01 08:41:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:18,870 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-04-01 08:41:18,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 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) [2023-04-01 08:41:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-04-01 08:41:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 08:41:18,871 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:18,871 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:18,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 08:41:19,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:19,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:19,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash -925698461, now seen corresponding path program 5 times [2023-04-01 08:41:19,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:19,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204214692] [2023-04-01 08:41:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:19,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:41:19,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:19,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204214692] [2023-04-01 08:41:19,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204214692] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:41:19,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76546276] [2023-04-01 08:41:19,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:41:19,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:19,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:19,628 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) [2023-04-01 08:41:19,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 08:41:19,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:41:19,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:41:19,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:41:19,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:41:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-04-01 08:41:19,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:41:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-04-01 08:41:19,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76546276] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:41:19,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2129093746] [2023-04-01 08:41:19,934 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:41:19,934 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:41:19,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:41:19,934 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:41:19,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:41:19,965 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:41:20,349 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:41:20,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:41:20,394 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:41:21,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1956#(and (exists ((|v_main_~#a4~0.base_BEFORE_CALL_5| Int) (|v_old(#memory_int)_BEFORE_CALL_5| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_5| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_5| (Array Int Int)) (|v_main_~#a1~0.base_BEFORE_CALL_5| Int)) (and (not (= |v_old(#valid)_BEFORE_CALL_5| (select |v_old(#memory_int)_BEFORE_CALL_5| 1))) (not (= 2 |v_main_~#a1~0.base_BEFORE_CALL_5|)) (= (select |v_old(#valid)_BEFORE_CALL_5| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_5| |v_main_~#a1~0.base_BEFORE_CALL_5|) 0) (not (= |v_main_~#a1~0.base_BEFORE_CALL_5| 1)) (not (= |v_main_~#a1~0.base_BEFORE_CALL_5| 0)) (not (= |v_main_~#a4~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (not (= |v_main_~#a4~0.base_BEFORE_CALL_5| 0)) (= (select |v_old(#valid)_BEFORE_CALL_5| 2) 1) (not (= |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_5|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_5| 1) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_5| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_5| 1) |v_old(#length)_BEFORE_CALL_5|)) (= (select |v_old(#valid)_BEFORE_CALL_5| 0) 0) (= 26 (select |v_old(#length)_BEFORE_CALL_5| 2)) (not (= |v_old(#valid)_BEFORE_CALL_5| |v_old(#length)_BEFORE_CALL_5|)) (= 2 (select |v_old(#length)_BEFORE_CALL_5| 1)) (not (= (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_5|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_5|) 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:41:21,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:41:21,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:41:21,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-01 08:41:21,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052982832] [2023-04-01 08:41:21,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:41:21,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 08:41:21,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:21,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 08:41:21,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1587, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 08:41:21,033 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 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) [2023-04-01 08:41:21,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:21,162 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2023-04-01 08:41:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 08:41:21,163 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 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 48 [2023-04-01 08:41:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:21,164 INFO L225 Difference]: With dead ends: 95 [2023-04-01 08:41:21,164 INFO L226 Difference]: Without dead ends: 71 [2023-04-01 08:41:21,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=393, Invalid=1587, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 08:41:21,165 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:21,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:41:21,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-01 08:41:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-04-01 08:41:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 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) [2023-04-01 08:41:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-04-01 08:41:21,172 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 48 [2023-04-01 08:41:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:21,173 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-04-01 08:41:21,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 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) [2023-04-01 08:41:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-04-01 08:41:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 08:41:21,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:21,174 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:21,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:41:21,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:21,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:21,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash -484088814, now seen corresponding path program 6 times [2023-04-01 08:41:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:21,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783560106] [2023-04-01 08:41:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:21,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-01 08:41:22,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:22,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783560106] [2023-04-01 08:41:22,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783560106] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:41:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947664025] [2023-04-01 08:41:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:41:22,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:22,121 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) [2023-04-01 08:41:22,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 08:41:22,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:41:22,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:41:22,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 08:41:22,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:41:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-01 08:41:22,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:41:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-01 08:41:22,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947664025] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:41:22,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727282216] [2023-04-01 08:41:22,970 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:41:22,970 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:41:22,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:41:22,971 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:41:22,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:41:23,000 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:41:23,369 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:41:23,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:41:23,399 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:41:24,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2728#(and (exists ((|v_old(#valid)_BEFORE_CALL_6| (Array Int Int)) (|v_main_~#a4~0.base_BEFORE_CALL_6| Int) (|v_old(#memory_int)_BEFORE_CALL_6| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_6| (Array Int Int)) (|v_main_~#a1~0.base_BEFORE_CALL_6| Int)) (and (not (= |v_main_~#a1~0.base_BEFORE_CALL_6| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_6| 1) 1) 0) (not (= 2 |v_main_~#a1~0.base_BEFORE_CALL_6|)) (not (= |v_old(#valid)_BEFORE_CALL_6| |v_old(#length)_BEFORE_CALL_6|)) (not (= |v_main_~#a4~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_6|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_6| 1) 0) 48) (not (= (select |v_old(#memory_int)_BEFORE_CALL_6| 1) |v_old(#length)_BEFORE_CALL_6|)) (not (= |v_main_~#a4~0.base_BEFORE_CALL_6| 0)) (= (select |v_old(#valid)_BEFORE_CALL_6| 2) 1) (not (= |v_main_~#a1~0.base_BEFORE_CALL_6| 1)) (= (select |v_old(#length)_BEFORE_CALL_6| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_6| (select |v_old(#memory_int)_BEFORE_CALL_6| 1))) (= (select |v_old(#valid)_BEFORE_CALL_6| |v_main_~#a1~0.base_BEFORE_CALL_6|) 0) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_6|) 0))) (= (select |v_old(#valid)_BEFORE_CALL_6| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_6| 0) 0) (= (select |v_old(#length)_BEFORE_CALL_6| 2) 26))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:41:24,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:41:24,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:41:24,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-01 08:41:24,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171678198] [2023-04-01 08:41:24,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:41:24,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-01 08:41:24,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-01 08:41:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=2357, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 08:41:24,048 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 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) [2023-04-01 08:41:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:24,124 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2023-04-01 08:41:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-01 08:41:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 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 67 [2023-04-01 08:41:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:24,126 INFO L225 Difference]: With dead ends: 138 [2023-04-01 08:41:24,126 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 08:41:24,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1303, Invalid=2357, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 08:41:24,128 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:24,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:41:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 08:41:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-04-01 08:41:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 90 states have internal predecessors, (95), 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) [2023-04-01 08:41:24,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2023-04-01 08:41:24,136 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 67 [2023-04-01 08:41:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:24,137 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2023-04-01 08:41:24,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 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) [2023-04-01 08:41:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2023-04-01 08:41:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 08:41:24,138 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:24,138 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:24,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 08:41:24,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:24,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:24,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 998655843, now seen corresponding path program 7 times [2023-04-01 08:41:24,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:24,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80040838] [2023-04-01 08:41:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:24,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-01 08:41:26,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:26,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80040838] [2023-04-01 08:41:26,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80040838] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:41:26,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181401729] [2023-04-01 08:41:26,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:41:26,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:26,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:26,422 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) [2023-04-01 08:41:26,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 08:41:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:26,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 08:41:26,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:41:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-01 08:41:26,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:41:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-01 08:41:29,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181401729] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:41:29,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1684598730] [2023-04-01 08:41:29,188 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:41:29,188 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:41:29,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:41:29,188 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:41:29,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:41:29,210 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:41:29,572 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:41:29,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:41:29,601 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:41:30,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3836#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_main_~#a4~0.base_BEFORE_CALL_7| Int) (|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int)) (|v_main_~#a1~0.base_BEFORE_CALL_7| Int)) (and (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_7|) 0))) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (not (= |v_main_~#a1~0.base_BEFORE_CALL_7| 1)) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (not (= |v_main_~#a1~0.base_BEFORE_CALL_7| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (not (= 2 |v_main_~#a1~0.base_BEFORE_CALL_7|)) (= 26 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (not (= |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_7|)) (not (= |v_main_~#a4~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= |v_main_~#a4~0.base_BEFORE_CALL_7| 0)) (= (select |v_old(#valid)_BEFORE_CALL_7| |v_main_~#a1~0.base_BEFORE_CALL_7|) 0) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)))) (= |#NULL.base| 0))' at error location [2023-04-01 08:41:30,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:41:30,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:41:30,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-01 08:41:30,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310201628] [2023-04-01 08:41:30,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:41:30,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-01 08:41:30,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:30,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-01 08:41:30,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5078, Invalid=7132, Unknown=0, NotChecked=0, Total=12210 [2023-04-01 08:41:30,370 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 101 states have internal predecessors, (113), 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) [2023-04-01 08:41:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:30,504 INFO L93 Difference]: Finished difference Result 188 states and 245 transitions. [2023-04-01 08:41:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-01 08:41:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 101 states have internal predecessors, (113), 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 92 [2023-04-01 08:41:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:30,508 INFO L225 Difference]: With dead ends: 188 [2023-04-01 08:41:30,508 INFO L226 Difference]: Without dead ends: 146 [2023-04-01 08:41:30,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5078, Invalid=7132, Unknown=0, NotChecked=0, Total=12210 [2023-04-01 08:41:30,513 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:30,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:41:30,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-04-01 08:41:30,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-04-01 08:41:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.0357142857142858) internal successors, (145), 140 states have internal predecessors, (145), 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) [2023-04-01 08:41:30,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2023-04-01 08:41:30,537 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 92 [2023-04-01 08:41:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:30,537 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2023-04-01 08:41:30,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 101 states have internal predecessors, (113), 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) [2023-04-01 08:41:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2023-04-01 08:41:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-01 08:41:30,545 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:30,545 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:30,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 08:41:30,752 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,SelfDestructingSolverStorable8 [2023-04-01 08:41:30,752 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:30,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:30,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1805345213, now seen corresponding path program 8 times [2023-04-01 08:41:30,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:30,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048208472] [2023-04-01 08:41:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:30,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-01 08:41:36,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:36,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048208472] [2023-04-01 08:41:36,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048208472] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:41:36,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272844871] [2023-04-01 08:41:36,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:41:36,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:36,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:36,447 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) [2023-04-01 08:41:36,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 08:41:38,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 08:41:38,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:41:38,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:41:38,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:41:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2023-04-01 08:41:38,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:41:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2023-04-01 08:41:38,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272844871] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:41:38,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879251002] [2023-04-01 08:41:38,989 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:41:38,989 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:41:38,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:41:38,989 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:41:38,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:41:39,011 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:41:39,367 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:41:39,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:41:39,390 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:41:40,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5466#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_8| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_8| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_8| (Array Int Int)) (|v_main_~#a1~0.base_BEFORE_CALL_8| Int) (|v_main_~#a4~0.base_BEFORE_CALL_8| Int)) (and (not (= |v_old(#valid)_BEFORE_CALL_8| |v_old(#length)_BEFORE_CALL_8|)) (= (select |v_old(#length)_BEFORE_CALL_8| 2) 26) (not (= |v_main_~#a4~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)) (not (= |v_main_~#a1~0.base_BEFORE_CALL_8| 0)) (not (= |v_old(#length)_BEFORE_CALL_8| (select |v_old(#memory_int)_BEFORE_CALL_8| 1))) (not (= |v_main_~#a4~0.base_BEFORE_CALL_8| 0)) (= (select |v_old(#valid)_BEFORE_CALL_8| 1) 1) (not (= |v_main_~#a1~0.base_BEFORE_CALL_8| 1)) (= (select |v_old(#length)_BEFORE_CALL_8| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_8| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_8| 1) 0) 48) (not (= 2 |v_main_~#a1~0.base_BEFORE_CALL_8|)) (not (= |v_old(#valid)_BEFORE_CALL_8| (select |v_old(#memory_int)_BEFORE_CALL_8| 1))) (= (select |v_old(#valid)_BEFORE_CALL_8| |v_main_~#a1~0.base_BEFORE_CALL_8|) 0) (not (= (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_8|) 0))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_8| 1) 1) 0) (not (= |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_8|)) (= (select |v_old(#valid)_BEFORE_CALL_8| 2) 1))) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:41:40,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:41:40,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:41:40,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-01 08:41:40,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853020481] [2023-04-01 08:41:40,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:41:40,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-01 08:41:40,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:40,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-01 08:41:40,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5353, Invalid=12203, Unknown=0, NotChecked=0, Total=17556 [2023-04-01 08:41:40,570 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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) [2023-04-01 08:41:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:40,821 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2023-04-01 08:41:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-01 08:41:40,822 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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 142 [2023-04-01 08:41:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:40,823 INFO L225 Difference]: With dead ends: 225 [2023-04-01 08:41:40,823 INFO L226 Difference]: Without dead ends: 183 [2023-04-01 08:41:40,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3461 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5353, Invalid=12203, Unknown=0, NotChecked=0, Total=17556 [2023-04-01 08:41:40,826 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:40,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 08:41:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-04-01 08:41:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2023-04-01 08:41:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 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) [2023-04-01 08:41:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 187 transitions. [2023-04-01 08:41:40,836 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 187 transitions. Word has length 142 [2023-04-01 08:41:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:40,837 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 187 transitions. [2023-04-01 08:41:40,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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) [2023-04-01 08:41:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 187 transitions. [2023-04-01 08:41:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-01 08:41:40,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:40,839 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:40,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 08:41:41,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 08:41:41,047 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:41,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:41,048 INFO L85 PathProgramCache]: Analyzing trace with hash 642308754, now seen corresponding path program 9 times [2023-04-01 08:41:41,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:41,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753822272] [2023-04-01 08:41:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:41,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:41:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-01 08:41:46,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:41:46,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753822272] [2023-04-01 08:41:46,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753822272] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:41:46,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048131393] [2023-04-01 08:41:46,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:41:46,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:41:46,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:41:46,757 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) [2023-04-01 08:41:46,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 08:41:47,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:41:47,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:41:47,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 08:41:47,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:41:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-01 08:41:47,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:41:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-01 08:41:56,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048131393] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:41:56,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879764375] [2023-04-01 08:41:56,807 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 08:41:56,807 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:41:56,807 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:41:56,807 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:41:56,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:41:56,834 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:41:57,193 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:41:57,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:41:57,222 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:41:58,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7546#(and (exists ((|v_old(#valid)_BEFORE_CALL_9| (Array Int Int)) (|v_main_~#a1~0.base_BEFORE_CALL_9| Int) (|v_old(#length)_BEFORE_CALL_9| (Array Int Int)) (|v_main_~#a4~0.base_BEFORE_CALL_9| Int) (|v_old(#memory_int)_BEFORE_CALL_9| (Array Int (Array Int Int)))) (and (= (select |v_old(#valid)_BEFORE_CALL_9| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_9| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_9| 2) 1) (not (= |v_main_~#a1~0.base_BEFORE_CALL_9| 0)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_9|) 0) (select (select |#memory_int| |v_main_~#a4~0.base_BEFORE_CALL_9|) 0))) (not (= |v_main_~#a1~0.base_BEFORE_CALL_9| 1)) (not (= |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_9|)) (= (select |v_old(#valid)_BEFORE_CALL_9| 0) 0) (not (= 2 |v_main_~#a1~0.base_BEFORE_CALL_9|)) (not (= |v_old(#length)_BEFORE_CALL_9| (select |v_old(#memory_int)_BEFORE_CALL_9| 1))) (= 26 (select |v_old(#length)_BEFORE_CALL_9| 2)) (not (= |v_old(#valid)_BEFORE_CALL_9| (select |v_old(#memory_int)_BEFORE_CALL_9| 1))) (not (= |v_main_~#a4~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_9| |v_old(#length)_BEFORE_CALL_9|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_9| 1) 0)) (not (= |v_main_~#a4~0.base_BEFORE_CALL_9| 0)) (= (select |v_old(#valid)_BEFORE_CALL_9| |v_main_~#a1~0.base_BEFORE_CALL_9|) 0) (= (select |v_old(#length)_BEFORE_CALL_9| 1) 2))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:41:58,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:41:58,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:41:58,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-01 08:41:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636475807] [2023-04-01 08:41:58,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:41:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-01 08:41:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:41:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-01 08:41:58,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20531, Invalid=24625, Unknown=0, NotChecked=0, Total=45156 [2023-04-01 08:41:58,426 INFO L87 Difference]: Start difference. First operand 183 states and 187 transitions. Second operand has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 203 states have internal predecessors, (215), 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) [2023-04-01 08:41:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:41:58,797 INFO L93 Difference]: Finished difference Result 362 states and 470 transitions. [2023-04-01 08:41:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-01 08:41:58,798 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 203 states have internal predecessors, (215), 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 179 [2023-04-01 08:41:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:41:58,799 INFO L225 Difference]: With dead ends: 362 [2023-04-01 08:41:58,799 INFO L226 Difference]: Without dead ends: 284 [2023-04-01 08:41:58,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3411 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=20531, Invalid=24625, Unknown=0, NotChecked=0, Total=45156 [2023-04-01 08:41:58,803 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:41:58,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:41:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-04-01 08:41:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2023-04-01 08:41:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.0179856115107915) internal successors, (283), 278 states have internal predecessors, (283), 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) [2023-04-01 08:41:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 288 transitions. [2023-04-01 08:41:58,815 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 288 transitions. Word has length 179 [2023-04-01 08:41:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:41:58,815 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 288 transitions. [2023-04-01 08:41:58,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 203 states have internal predecessors, (215), 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) [2023-04-01 08:41:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 288 transitions. [2023-04-01 08:41:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-04-01 08:41:58,819 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:41:58,819 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:41:58,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 08:41:59,027 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,SelfDestructingSolverStorable10 [2023-04-01 08:41:59,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:41:59,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:41:59,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1600872227, now seen corresponding path program 10 times [2023-04-01 08:41:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:41:59,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986860737] [2023-04-01 08:41:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:41:59,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:41:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat