/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/ldv-regression/test25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:49:45,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:49:45,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:49:45,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 04:49:45,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:49:45,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:49:45,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:49:45,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:49:45,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:49:45,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:49:45,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:49:45,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:49:45,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:49:45,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:49:45,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:49:45,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:49:45,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:49:45,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:49:45,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:49:45,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:49:45,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:49:45,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:49:45,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:49:45,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:49:45,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:49:45,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:49:45,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:49:45,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:49:45,285 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 04:49:45,305 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:49:45,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:49:45,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:49:45,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:49:45,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:49:45,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:49:45,307 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:49:45,308 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:49:45,308 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:49:45,308 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:49:45,309 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:49:45,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:49:45,309 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:49:45,309 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:49:45,309 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:49:45,309 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:49:45,309 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:49:45,309 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:49:45,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:49:45,310 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:49:45,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:49:45,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:49:45,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:49:45,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:49:45,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:49:45,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:49:45,311 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:49:45,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:49:45,311 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:49:45,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:49:45,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:49:45,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:49:45,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:49:45,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:49:45,312 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:49:45,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:49:45,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:49:45,313 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:49:45,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:49:45,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:49:45,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:49:45,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:49:45,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:49:45,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:49:45,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:49:45,570 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:49:45,571 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:49:45,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test25-1.c [2023-04-01 04:49:46,797 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:49:46,972 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:49:46,972 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c [2023-04-01 04:49:46,978 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66f5c0dab/96240a59fb9a46ce9b308065bc1848ca/FLAG5039e6a28 [2023-04-01 04:49:46,989 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66f5c0dab/96240a59fb9a46ce9b308065bc1848ca [2023-04-01 04:49:46,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:49:46,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:49:46,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:49:46,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:49:46,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:49:46,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:49:46" (1/1) ... [2023-04-01 04:49:47,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552a108d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47, skipping insertion in model container [2023-04-01 04:49:47,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:49:46" (1/1) ... [2023-04-01 04:49:47,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:49:47,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:49:47,162 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/ldv-regression/test25-1.c[936,949] [2023-04-01 04:49:47,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:49:47,178 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:49:47,201 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/ldv-regression/test25-1.c[936,949] [2023-04-01 04:49:47,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:49:47,219 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:49:47,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47 WrapperNode [2023-04-01 04:49:47,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:49:47,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:49:47,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:49:47,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:49:47,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47" (1/1) ... [2023-04-01 04:49:47,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47" (1/1) ... [2023-04-01 04:49:47,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47" (1/1) ... [2023-04-01 04:49:47,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47" (1/1) ... [2023-04-01 04:49:47,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47" (1/1) ... [2023-04-01 04:49:47,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47" (1/1) ... [2023-04-01 04:49:47,268 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47" (1/1) ... [2023-04-01 04:49:47,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47" (1/1) ... [2023-04-01 04:49:47,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:49:47,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:49:47,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:49:47,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:49:47,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47" (1/1) ... [2023-04-01 04:49:47,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:49:47,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:47,310 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 04:49:47,315 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 04:49:47,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:49:47,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:49:47,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:49:47,351 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 04:49:47,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:49:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:49:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:49:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:49:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:49:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:49:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 04:49:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:49:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:49:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:49:47,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:49:47,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:49:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:49:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:49:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:49:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:49:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:49:47,422 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:49:47,424 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:49:47,634 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:49:47,666 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:49:47,666 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 04:49:47,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:49:47 BoogieIcfgContainer [2023-04-01 04:49:47,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:49:47,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:49:47,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:49:47,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:49:47,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:49:46" (1/3) ... [2023-04-01 04:49:47,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6fa874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:49:47, skipping insertion in model container [2023-04-01 04:49:47,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:49:47" (2/3) ... [2023-04-01 04:49:47,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6fa874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:49:47, skipping insertion in model container [2023-04-01 04:49:47,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:49:47" (3/3) ... [2023-04-01 04:49:47,704 INFO L112 eAbstractionObserver]: Analyzing ICFG test25-1.c [2023-04-01 04:49:47,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:49:47,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:49:47,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:49:47,780 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;@6b6b1679, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:49:47,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:49:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 04:49:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 04:49:47,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:47,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:47,793 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:47,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:47,797 INFO L85 PathProgramCache]: Analyzing trace with hash 539874315, now seen corresponding path program 1 times [2023-04-01 04:49:47,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:47,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884336748] [2023-04-01 04:49:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:47,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:47,986 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 04:49:47,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:47,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884336748] [2023-04-01 04:49:47,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884336748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:49:47,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:49:47,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:49:47,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663379419] [2023-04-01 04:49:47,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:49:47,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:49:47,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:48,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:49:48,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:49:48,036 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:48,072 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2023-04-01 04:49:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:49:48,077 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-01 04:49:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:48,083 INFO L225 Difference]: With dead ends: 34 [2023-04-01 04:49:48,084 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 04:49:48,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:49:48,090 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:48,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:49:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 04:49:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-01 04:49:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 04:49:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-04-01 04:49:48,118 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-04-01 04:49:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:48,119 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-04-01 04:49:48,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-04-01 04:49:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 04:49:48,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:48,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:48,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:49:48,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:48,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:48,121 INFO L85 PathProgramCache]: Analyzing trace with hash -807993621, now seen corresponding path program 1 times [2023-04-01 04:49:48,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:48,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300829673] [2023-04-01 04:49:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:48,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:48,264 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 04:49:48,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300829673] [2023-04-01 04:49:48,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300829673] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:49:48,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:49:48,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:49:48,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647565785] [2023-04-01 04:49:48,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:49:48,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:49:48,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:48,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:49:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:49:48,269 INFO L87 Difference]: Start difference. First operand 17 states and 18 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), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:48,283 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-04-01 04:49:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:49:48,284 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), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-01 04:49:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:48,285 INFO L225 Difference]: With dead ends: 29 [2023-04-01 04:49:48,285 INFO L226 Difference]: Without dead ends: 18 [2023-04-01 04:49:48,285 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 04:49:48,286 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:48,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:49:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-01 04:49:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-01 04:49:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 04:49:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-04-01 04:49:48,292 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2023-04-01 04:49:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:48,292 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-04-01 04:49:48,292 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), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-04-01 04:49:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 04:49:48,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:48,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:48,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:49:48,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:48,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2104388636, now seen corresponding path program 1 times [2023-04-01 04:49:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:48,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833473542] [2023-04-01 04:49:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:48,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:48,472 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 04:49:48,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:48,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833473542] [2023-04-01 04:49:48,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833473542] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:48,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659868089] [2023-04-01 04:49:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:48,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:48,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:48,478 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 04:49:48,480 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 04:49:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:48,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 04:49:48,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:48,656 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 04:49:48,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:48,717 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 04:49:48,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659868089] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:48,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858378714] [2023-04-01 04:49:48,743 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 04:49:48,743 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:48,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:48,751 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:48,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:48,850 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:49:49,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:49,191 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:49,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [858378714] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:49:49,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:49,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 4, 4] total 16 [2023-04-01 04:49:49,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978730754] [2023-04-01 04:49:49,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:49:49,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 04:49:49,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:49,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 04:49:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-01 04:49:49,954 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 11 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:50,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:50,993 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-04-01 04:49:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 04:49:50,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 04:49:50,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:50,994 INFO L225 Difference]: With dead ends: 27 [2023-04-01 04:49:50,994 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 04:49:50,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:49:50,996 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:50,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 4 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:49:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 04:49:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 04:49:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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 04:49:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-01 04:49:51,028 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2023-04-01 04:49:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:51,029 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-01 04:49:51,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-01 04:49:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 04:49:51,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:51,030 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:51,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:49:51,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:51,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:51,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:51,237 INFO L85 PathProgramCache]: Analyzing trace with hash -88432031, now seen corresponding path program 1 times [2023-04-01 04:49:51,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:51,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241520306] [2023-04-01 04:49:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:51,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:49:51,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:51,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241520306] [2023-04-01 04:49:51,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241520306] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:51,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144085335] [2023-04-01 04:49:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:51,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:51,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:51,348 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 04:49:51,351 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 04:49:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:51,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 04:49:51,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:49:51,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:49:51,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144085335] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:51,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020095914] [2023-04-01 04:49:51,454 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 04:49:51,454 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:51,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:51,455 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:51,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:51,489 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:49:51,843 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 19 for LOIs [2023-04-01 04:49:51,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:51,855 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:52,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '494#(and (<= 1 |#StackHeapBarrier|) (= |main_~#array~0.offset| 0) (<= 10 main_~j~0) (<= (+ |#StackHeapBarrier| 1) |main_~#array~0.base|) (<= (+ |#StackHeapBarrier| 1) |main_~#cont~0.base|) (= |#NULL.offset| 0) (= |main_~#cont~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:52,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:52,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:52,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 04:49:52,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486952254] [2023-04-01 04:49:52,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:52,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 04:49:52,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:52,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 04:49:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-01 04:49:52,424 INFO L87 Difference]: Start difference. First operand 20 states and 21 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:52,445 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-04-01 04:49:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:49:52,445 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-04-01 04:49:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:52,446 INFO L225 Difference]: With dead ends: 36 [2023-04-01 04:49:52,446 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 04:49:52,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-01 04:49:52,447 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:52,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:49:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 04:49:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 04:49:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:49:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-04-01 04:49:52,456 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2023-04-01 04:49:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:52,456 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-04-01 04:49:52,457 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-04-01 04:49:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:49:52,457 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:52,458 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:52,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:49:52,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 04:49:52,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:52,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1663831632, now seen corresponding path program 2 times [2023-04-01 04:49:52,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:52,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581519600] [2023-04-01 04:49:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:52,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:49:52,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581519600] [2023-04-01 04:49:52,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581519600] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647640663] [2023-04-01 04:49:52,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:49:52,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:52,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:52,818 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 04:49:52,821 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 04:49:52,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 04:49:52,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:49:52,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 04:49:52,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:53,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:53,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 26 [2023-04-01 04:49:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 04:49:53,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:53,110 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-04-01 04:49:53,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2023-04-01 04:49:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 04:49:53,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647640663] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:53,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638976792] [2023-04-01 04:49:53,127 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 04:49:53,127 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:53,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:53,128 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:53,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:53,155 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:49:53,458 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 19 for LOIs [2023-04-01 04:49:53,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:53,467 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:54,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '740#(and (<= 1 |#StackHeapBarrier|) (= |main_~#array~0.offset| 0) (<= 10 main_~j~0) (<= (+ |#StackHeapBarrier| 1) |main_~#array~0.base|) (<= (+ |#StackHeapBarrier| 1) |main_~#cont~0.base|) (= |#NULL.offset| 0) (= |main_~#cont~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:54,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:54,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:54,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-04-01 04:49:54,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409402652] [2023-04-01 04:49:54,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:54,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 04:49:54,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 04:49:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-04-01 04:49:54,141 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:54,284 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-04-01 04:49:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 04:49:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2023-04-01 04:49:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:54,287 INFO L225 Difference]: With dead ends: 43 [2023-04-01 04:49:54,287 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 04:49:54,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-04-01 04:49:54,288 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:54,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:49:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 04:49:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 04:49:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 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 04:49:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-04-01 04:49:54,298 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 22 [2023-04-01 04:49:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:54,299 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-04-01 04:49:54,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-04-01 04:49:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:49:54,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:54,300 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:54,306 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 04:49:54,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:54,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:54,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:54,507 INFO L85 PathProgramCache]: Analyzing trace with hash 794302832, now seen corresponding path program 3 times [2023-04-01 04:49:54,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:54,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595016245] [2023-04-01 04:49:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:54,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 04:49:54,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:54,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595016245] [2023-04-01 04:49:54,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595016245] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:54,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262596919] [2023-04-01 04:49:54,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:49:54,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:54,635 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 04:49:54,657 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 04:49:54,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:49:54,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:49:54,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 04:49:54,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:54,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:54,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 26 [2023-04-01 04:49:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 04:49:54,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:55,067 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-04-01 04:49:55,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2023-04-01 04:49:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 04:49:55,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262596919] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:55,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081305267] [2023-04-01 04:49:55,089 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 04:49:55,089 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:55,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:55,097 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:55,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:55,119 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:49:55,348 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 19 for LOIs [2023-04-01 04:49:55,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:55,356 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:56,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1065#(and (<= 1 |#StackHeapBarrier|) (= |main_~#array~0.offset| 0) (<= 10 main_~j~0) (<= (+ |#StackHeapBarrier| 1) |main_~#array~0.base|) (<= (+ |#StackHeapBarrier| 1) |main_~#cont~0.base|) (= |#NULL.offset| 0) (= |main_~#cont~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:56,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:56,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:56,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2023-04-01 04:49:56,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554590974] [2023-04-01 04:49:56,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:56,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 04:49:56,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:56,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 04:49:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2023-04-01 04:49:56,139 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:56,420 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2023-04-01 04:49:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 04:49:56,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-04-01 04:49:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:56,430 INFO L225 Difference]: With dead ends: 62 [2023-04-01 04:49:56,430 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 04:49:56,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 04:49:56,431 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:56,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:49:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 04:49:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-01 04:49:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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 04:49:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2023-04-01 04:49:56,445 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 29 [2023-04-01 04:49:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:56,445 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2023-04-01 04:49:56,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2023-04-01 04:49:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 04:49:56,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:56,447 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:56,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:49:56,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:56,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:56,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:56,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1114044867, now seen corresponding path program 4 times [2023-04-01 04:49:56,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:56,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704947620] [2023-04-01 04:49:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:56,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 04:49:56,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704947620] [2023-04-01 04:49:56,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704947620] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456928658] [2023-04-01 04:49:56,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:49:56,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:56,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:56,825 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 04:49:56,827 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 04:49:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:56,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 04:49:56,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 04:49:56,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 04:49:57,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456928658] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:57,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [913755284] [2023-04-01 04:49:57,028 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 04:49:57,029 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:57,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:57,029 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:57,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:57,043 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:49:57,320 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 19 for LOIs [2023-04-01 04:49:57,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:57,330 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:58,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1521#(and (<= 1 |#StackHeapBarrier|) (= |main_~#array~0.offset| 0) (<= 10 main_~j~0) (<= (+ |#StackHeapBarrier| 1) |main_~#array~0.base|) (<= (+ |#StackHeapBarrier| 1) |main_~#cont~0.base|) (= |#NULL.offset| 0) (= |main_~#cont~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:58,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:58,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:58,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2023-04-01 04:49:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670174385] [2023-04-01 04:49:58,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:58,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 04:49:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 04:49:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:49:58,063 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:58,108 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2023-04-01 04:49:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 04:49:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-04-01 04:49:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:58,109 INFO L225 Difference]: With dead ends: 78 [2023-04-01 04:49:58,109 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 04:49:58,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 97 SyntacticMatches, 15 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:49:58,110 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:58,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:49:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 04:49:58,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 04:49:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 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 04:49:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-04-01 04:49:58,124 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2023-04-01 04:49:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:58,124 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-04-01 04:49:58,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:49:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-04-01 04:49:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 04:49:58,125 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:58,125 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:58,132 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 04:49:58,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:58,332 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:58,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:58,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1658485373, now seen corresponding path program 5 times [2023-04-01 04:49:58,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:58,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992407231] [2023-04-01 04:49:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:58,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:49:58,416 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 04:49:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:49:58,494 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 04:49:58,494 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 04:49:58,495 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 04:49:58,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 04:49:58,500 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1] [2023-04-01 04:49:58,503 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 04:49:58,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 04:49:58 BoogieIcfgContainer [2023-04-01 04:49:58,540 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 04:49:58,541 INFO L158 Benchmark]: Toolchain (without parser) took 11548.60ms. Allocated memory was 237.0MB in the beginning and 342.9MB in the end (delta: 105.9MB). Free memory was 187.6MB in the beginning and 138.0MB in the end (delta: 49.6MB). Peak memory consumption was 156.5MB. Max. memory is 8.0GB. [2023-04-01 04:49:58,541 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 195.0MB. Free memory is still 140.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:49:58,541 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.75ms. Allocated memory is still 237.0MB. Free memory was 187.6MB in the beginning and 177.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 04:49:58,541 INFO L158 Benchmark]: Boogie Preprocessor took 49.99ms. Allocated memory is still 237.0MB. Free memory was 177.1MB in the beginning and 175.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 04:49:58,542 INFO L158 Benchmark]: RCFGBuilder took 409.11ms. Allocated memory is still 237.0MB. Free memory was 175.0MB in the beginning and 160.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-04-01 04:49:58,542 INFO L158 Benchmark]: TraceAbstraction took 10858.00ms. Allocated memory was 237.0MB in the beginning and 342.9MB in the end (delta: 105.9MB). Free memory was 159.8MB in the beginning and 138.0MB in the end (delta: 21.8MB). Peak memory consumption was 128.2MB. Max. memory is 8.0GB. [2023-04-01 04:49:58,543 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 195.0MB. Free memory is still 140.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.75ms. Allocated memory is still 237.0MB. Free memory was 187.6MB in the beginning and 177.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 49.99ms. Allocated memory is still 237.0MB. Free memory was 177.1MB in the beginning and 175.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 409.11ms. Allocated memory is still 237.0MB. Free memory was 175.0MB in the beginning and 160.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 10858.00ms. Allocated memory was 237.0MB in the beginning and 342.9MB in the end (delta: 105.9MB). Free memory was 159.8MB in the beginning and 138.0MB in the end (delta: 21.8MB). Peak memory consumption was 128.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 47]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; VAL [array={5:0}, cont={6:0}, i=0, j=0] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=1] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=2] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=3] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=4] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=5] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=6] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=7] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=8] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=9] [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ VAL [array={5:0}, cont={6:0}, i=0, j=10] [L26] COND FALSE !(j < 10) VAL [array={5:0}, cont={6:0}, i=0, j=10] [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b VAL [array={5:0}, cont.array={5:0}, cont.array[0].b=17, cont={6:0}, i=0, j=10, pa={5:4}] [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=7, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=8, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=8, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=9, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=9, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=10, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=10, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=11, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=11, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=12, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=12, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=13, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=13, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=14, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=14, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=15, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=15, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=16, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=16, j=10, pa={5:4}] [L36] COND TRUE i < *pa [L37] ++i VAL [array={5:0}, cont={6:0}, i=17, j=10, pa={5:4}] [L36] EXPR \read(*pa) VAL [\read(*pa)=17, array={5:0}, cont={6:0}, i=17, j=10, pa={5:4}] [L36] COND FALSE !(i < *pa) [L39] CALL, EXPR check(&cont, i) VAL [\old(i)=17, pc={6:0}] [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] RET, EXPR check(&cont, i) VAL [array={5:0}, check(&cont, i)=0, cont={6:0}, i=17, j=10, pa={5:4}] [L39] COND TRUE !check(&cont, i) [L47] reach_error() VAL [array={5:0}, cont={6:0}, i=17, j=10, pa={5:4}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.7s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 39 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 309 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 221 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 284 IncrementalHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 88 mSDtfsCounter, 284 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 441 GetRequests, 289 SyntacticMatches, 24 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=7, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 335 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 401 ConstructedInterpolants, 0 QuantifiedInterpolants, 999 SizeOfPredicates, 24 NumberOfNonLiveVariables, 949 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 408/546 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 16, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 34, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.2s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 124, DAG_COMPRESSION_RETAINED_NODES: 49, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-01 04:49:58,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...