/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:21:59,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:21:59,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:21:59,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 14:21:59,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:21:59,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:21:59,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:21:59,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:21:59,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:21:59,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:21:59,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:21:59,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:21:59,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:21:59,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:21:59,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:21:59,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:21:59,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 14:21:59,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:21:59,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:21:59,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:21:59,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:21:59,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:21:59,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:21:59,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:21:59,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:21:59,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:21:59,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:21:59,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:21:59,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:21:59,415 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:21:59,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:21:59,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:21:59,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:21:59,416 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:21:59,416 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:21:59,416 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:21:59,416 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:21:59,417 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:21:59,417 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:21:59,417 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:21:59,417 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:21:59,417 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:21:59,417 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:21:59,418 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:21:59,418 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:21:59,418 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:21:59,418 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:21:59,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:21:59,418 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:21:59,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:21:59,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:21:59,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:21:59,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:21:59,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:21:59,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:21:59,419 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:21:59,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:21:59,419 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:21:59,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:21:59,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:21:59,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:21:59,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:21:59,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:21:59,420 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:21:59,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:21:59,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:21:59,420 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:21:59,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:21:59,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:21:59,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:21:59,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:21:59,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:21:59,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:21:59,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:21:59,608 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:21:59,608 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:21:59,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i [2023-04-02 14:22:00,680 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:22:00,880 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:22:00,880 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i [2023-04-02 14:22:00,885 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367f00308/1eeab718c6e04cab8e5cc88bac8cd6cc/FLAG7520ab29f [2023-04-02 14:22:00,899 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367f00308/1eeab718c6e04cab8e5cc88bac8cd6cc [2023-04-02 14:22:00,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:22:00,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:22:00,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:22:00,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:22:00,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:22:00,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:22:00" (1/1) ... [2023-04-02 14:22:00,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@666f23f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:00, skipping insertion in model container [2023-04-02 14:22:00,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:22:00" (1/1) ... [2023-04-02 14:22:00,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:22:00,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:22:01,022 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i[865,878] [2023-04-02 14:22:01,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:22:02,058 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:22:02,068 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i[865,878] [2023-04-02 14:22:02,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:22:02,090 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:22:02,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02 WrapperNode [2023-04-02 14:22:02,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:22:02,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:22:02,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:22:02,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:22:02,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02" (1/1) ... [2023-04-02 14:22:02,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02" (1/1) ... [2023-04-02 14:22:02,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02" (1/1) ... [2023-04-02 14:22:02,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02" (1/1) ... [2023-04-02 14:22:02,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02" (1/1) ... [2023-04-02 14:22:02,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02" (1/1) ... [2023-04-02 14:22:02,116 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02" (1/1) ... [2023-04-02 14:22:02,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02" (1/1) ... [2023-04-02 14:22:02,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:22:02,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:22:02,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:22:02,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:22:02,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02" (1/1) ... [2023-04-02 14:22:02,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:22:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:22:02,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:22:02,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:22:02,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:22:02,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:22:02,178 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:22:02,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:22:02,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:22:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:22:02,178 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:22:02,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:22:02,257 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:22:02,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:22:02,448 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:22:02,501 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:22:02,501 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 14:22:02,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:22:02 BoogieIcfgContainer [2023-04-02 14:22:02,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:22:02,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:22:02,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:22:02,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:22:02,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:22:00" (1/3) ... [2023-04-02 14:22:02,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e4c119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:22:02, skipping insertion in model container [2023-04-02 14:22:02,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:22:02" (2/3) ... [2023-04-02 14:22:02,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e4c119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:22:02, skipping insertion in model container [2023-04-02 14:22:02,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:22:02" (3/3) ... [2023-04-02 14:22:02,516 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_single_elem_init.i [2023-04-02 14:22:02,531 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:22:02,531 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:22:02,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:22:02,577 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;@58dadf21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:22:02,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:22:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:22:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 14:22:02,586 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:22:02,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:22:02,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:22:02,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:22:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1789234444, now seen corresponding path program 1 times [2023-04-02 14:22:02,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:22:02,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160699427] [2023-04-02 14:22:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:22:02,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:22:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:22:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:02,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:22:02,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160699427] [2023-04-02 14:22:02,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160699427] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:22:02,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:22:02,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:22:02,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544359213] [2023-04-02 14:22:02,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:22:02,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:22:02,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:22:02,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:22:02,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:22:02,886 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:22:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:22:02,945 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-04-02 14:22:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:22:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 14:22:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:22:02,954 INFO L225 Difference]: With dead ends: 40 [2023-04-02 14:22:02,954 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 14:22:02,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:22:02,961 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:22:02,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:22:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 14:22:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2023-04-02 14:22:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:22:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 14:22:02,990 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-04-02 14:22:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:22:02,991 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 14:22:02,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:22:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 14:22:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 14:22:02,991 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:22:02,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:22:02,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:22:02,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:22:02,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:22:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash -64648684, now seen corresponding path program 1 times [2023-04-02 14:22:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:22:02,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613527274] [2023-04-02 14:22:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:22:02,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:22:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:22:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:03,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:22:03,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613527274] [2023-04-02 14:22:03,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613527274] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:22:03,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291383014] [2023-04-02 14:22:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:22:03,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:22:03,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:22:03,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:22:03,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:22:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:22:03,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:22:03,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:22:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:03,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:22:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:03,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291383014] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:22:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1810541481] [2023-04-02 14:22:03,250 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:22:03,250 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:22:03,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:22:03,257 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:22:03,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:22:03,366 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-04-02 14:22:03,524 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2023-04-02 14:22:03,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:22:03,585 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:22:04,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '189#(and (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| 3) 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_#length_26| (Array Int Int)) (|v_main_~#s1~0.base_BEFORE_CALL_1| Int) (|v_#valid_36| (Array Int Int))) (and (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_1|) 4) 0) (< |#StackHeapBarrier| |v_main_~#s1~0.base_BEFORE_CALL_1|) (= (store |v_#length_26| |v_main_~#s1~0.base_BEFORE_CALL_1| 8) |#length|) (= (store |v_#valid_36| |v_main_~#s1~0.base_BEFORE_CALL_1| 1) |#valid|) (not (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_1|) 0) 10)) (= (select |v_#valid_36| |v_main_~#s1~0.base_BEFORE_CALL_1|) 0) (not (= |v_main_~#s1~0.base_BEFORE_CALL_1| 0)) (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| 3) 0)))) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (exists ((|v_#memory_int_58| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_58| 3 (store (store (select |v_#memory_int_58| 3) 24 30) 28 40)))) (= |#NULL.base| 0))' at error location [2023-04-02 14:22:04,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:22:04,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:22:04,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:22:04,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875463054] [2023-04-02 14:22:04,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:22:04,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:22:04,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:22:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:22:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:22:04,082 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:22:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:22:04,119 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-04-02 14:22:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:22:04,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 14:22:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:22:04,121 INFO L225 Difference]: With dead ends: 48 [2023-04-02 14:22:04,121 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 14:22:04,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:22:04,122 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:22:04,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 45 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:22:04,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 14:22:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 21. [2023-04-02 14:22:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2023-04-02 14:22:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-02 14:22:04,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2023-04-02 14:22:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:22:04,126 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-02 14:22:04,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:22:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-02 14:22:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 14:22:04,127 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:22:04,127 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:22:04,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:22:04,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:22:04,332 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:22:04,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:22:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash -918515956, now seen corresponding path program 2 times [2023-04-02 14:22:04,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:22:04,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157472450] [2023-04-02 14:22:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:22:04,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:22:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:22:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:04,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:22:04,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157472450] [2023-04-02 14:22:04,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157472450] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:22:04,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23901371] [2023-04-02 14:22:04,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:22:04,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:22:04,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:22:04,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:22:04,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:22:04,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:22:04,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:22:04,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:22:04,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:22:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:04,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:22:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:04,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23901371] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:22:04,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948279924] [2023-04-02 14:22:04,668 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:22:04,668 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:22:04,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:22:04,669 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:22:04,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:22:04,703 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-04-02 14:22:04,797 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2023-04-02 14:22:04,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:22:04,831 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:22:05,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '409#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_int_79| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_79| 3 (store (store (select |v_#memory_int_79| 3) 24 30) 28 40)))) (= (select (select |#memory_int| 3) 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (exists ((|v_#valid_44| (Array Int Int)) (|v_#length_34| (Array Int Int)) (|v_main_~#s1~0.base_BEFORE_CALL_2| Int)) (and (= (select |v_#valid_44| |v_main_~#s1~0.base_BEFORE_CALL_2|) 0) (= |#length| (store |v_#length_34| |v_main_~#s1~0.base_BEFORE_CALL_2| 8)) (not (= |v_main_~#s1~0.base_BEFORE_CALL_2| 0)) (not (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_2|) 0) 10)) (= (store |v_#valid_44| |v_main_~#s1~0.base_BEFORE_CALL_2| 1) |#valid|) (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_2|) 4) 0) (= (select (select |#memory_int| 3) 0) (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_2|) 0)) (< |#StackHeapBarrier| |v_main_~#s1~0.base_BEFORE_CALL_2|))) (= |#NULL.base| 0))' at error location [2023-04-02 14:22:05,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:22:05,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:22:05,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:22:05,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075508568] [2023-04-02 14:22:05,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:22:05,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:22:05,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:22:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:22:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:22:05,258 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:22:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:22:05,324 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2023-04-02 14:22:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:22:05,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-02 14:22:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:22:05,326 INFO L225 Difference]: With dead ends: 84 [2023-04-02 14:22:05,326 INFO L226 Difference]: Without dead ends: 73 [2023-04-02 14:22:05,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:22:05,327 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:22:05,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 70 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:22:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-02 14:22:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 27. [2023-04-02 14:22:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:22:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-02 14:22:05,334 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2023-04-02 14:22:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:22:05,334 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-02 14:22:05,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:22:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-02 14:22:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 14:22:05,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:22:05,335 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:22:05,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:22:05,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 14:22:05,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:22:05,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:22:05,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1230582284, now seen corresponding path program 3 times [2023-04-02 14:22:05,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:22:05,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160380832] [2023-04-02 14:22:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:22:05,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:22:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:22:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:05,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:22:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160380832] [2023-04-02 14:22:05,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160380832] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:22:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314140161] [2023-04-02 14:22:05,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:22:05,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:22:05,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:22:05,766 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:22:05,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:22:05,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:22:05,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:22:05,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:22:05,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:22:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:05,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:22:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:06,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314140161] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:22:06,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834464800] [2023-04-02 14:22:06,056 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:22:06,056 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:22:06,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:22:06,056 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:22:06,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:22:06,079 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-04-02 14:22:06,128 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2023-04-02 14:22:06,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:22:06,151 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:22:06,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '743#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_int_118| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_118| 3 (store (store (select |v_#memory_int_118| 3) 24 30) 28 40)))) (exists ((|v_main_~#s1~0.base_BEFORE_CALL_3| Int) (|v_#length_48| (Array Int Int)) (|v_#valid_58| (Array Int Int))) (and (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_3|) 4) 0) (not (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_3|) 0) 10)) (< |#StackHeapBarrier| |v_main_~#s1~0.base_BEFORE_CALL_3|) (not (= |v_main_~#s1~0.base_BEFORE_CALL_3| 0)) (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| 3) 0)) (= 0 (select |v_#valid_58| |v_main_~#s1~0.base_BEFORE_CALL_3|)) (= (store |v_#valid_58| |v_main_~#s1~0.base_BEFORE_CALL_3| 1) |#valid|) (= |#length| (store |v_#length_48| |v_main_~#s1~0.base_BEFORE_CALL_3| 8)))) (= (select (select |#memory_int| 3) 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:22:06,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:22:06,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:22:06,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:22:06,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318142996] [2023-04-02 14:22:06,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:22:06,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:22:06,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:22:06,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:22:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:22:06,578 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:22:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:22:06,745 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2023-04-02 14:22:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:22:06,745 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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 22 [2023-04-02 14:22:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:22:06,746 INFO L225 Difference]: With dead ends: 156 [2023-04-02 14:22:06,747 INFO L226 Difference]: Without dead ends: 145 [2023-04-02 14:22:06,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:22:06,748 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 246 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:22:06,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 113 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:22:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-04-02 14:22:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 39. [2023-04-02 14:22:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:22:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-04-02 14:22:06,756 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2023-04-02 14:22:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:22:06,757 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-04-02 14:22:06,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:22:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-04-02 14:22:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 14:22:06,757 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:22:06,758 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:22:06,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:22:06,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:22:06,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:22:06,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:22:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2020063244, now seen corresponding path program 4 times [2023-04-02 14:22:06,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:22:06,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600990872] [2023-04-02 14:22:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:22:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:22:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:22:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:07,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:22:07,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600990872] [2023-04-02 14:22:07,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600990872] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:22:07,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945282766] [2023-04-02 14:22:07,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:22:07,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:22:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:22:07,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:22:07,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:22:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:22:07,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 14:22:07,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:22:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:07,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:22:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:08,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945282766] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:22:08,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [160652847] [2023-04-02 14:22:08,621 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:22:08,621 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:22:08,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:22:08,622 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:22:08,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:22:08,675 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-04-02 14:22:08,718 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2023-04-02 14:22:08,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:22:08,736 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:22:09,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1305#(and (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| 3) 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#s1~0.base_BEFORE_CALL_4| Int) (|v_#valid_84| (Array Int Int)) (|v_#length_74| (Array Int Int))) (and (= (select |v_#valid_84| |v_main_~#s1~0.base_BEFORE_CALL_4|) 0) (< |#StackHeapBarrier| |v_main_~#s1~0.base_BEFORE_CALL_4|) (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| 3) 0)) (= |#valid| (store |v_#valid_84| |v_main_~#s1~0.base_BEFORE_CALL_4| 1)) (not (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_4|) 0) 10)) (not (= |v_main_~#s1~0.base_BEFORE_CALL_4| 0)) (= |#length| (store |v_#length_74| |v_main_~#s1~0.base_BEFORE_CALL_4| 8)) (= (select (select |#memory_int| |v_main_~#s1~0.base_BEFORE_CALL_4|) 4) 0))) (= 3 |~#a~0.base|) (exists ((|v_#memory_int_193| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_193| 3 (store (store (select |v_#memory_int_193| 3) 24 30) 28 40)))) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:22:09,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:22:09,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:22:09,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 14:22:09,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768908413] [2023-04-02 14:22:09,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:22:09,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 14:22:09,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:22:09,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 14:22:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1356, Invalid=2184, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 14:22:09,159 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:22:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:22:09,544 INFO L93 Difference]: Finished difference Result 300 states and 417 transitions. [2023-04-02 14:22:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 14:22:09,545 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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 34 [2023-04-02 14:22:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:22:09,547 INFO L225 Difference]: With dead ends: 300 [2023-04-02 14:22:09,547 INFO L226 Difference]: Without dead ends: 289 [2023-04-02 14:22:09,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1356, Invalid=2184, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 14:22:09,549 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 548 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:22:09,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 210 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:22:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-04-02 14:22:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 63. [2023-04-02 14:22:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:22:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-04-02 14:22:09,561 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 34 [2023-04-02 14:22:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:22:09,561 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-04-02 14:22:09,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:22:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-04-02 14:22:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 14:22:09,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:22:09,563 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:22:09,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:22:09,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:22:09,769 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:22:09,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:22:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -986070004, now seen corresponding path program 5 times [2023-04-02 14:22:09,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:22:09,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663382860] [2023-04-02 14:22:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:22:09,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:22:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:22:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:11,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:22:11,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663382860] [2023-04-02 14:22:11,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663382860] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:22:11,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433219012] [2023-04-02 14:22:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:22:11,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:22:11,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:22:11,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:22:11,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process