/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/loops-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:22:25,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:22:25,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:22:25,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:22:25,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:22:25,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:22:25,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:22:25,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:22:25,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:22:25,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:22:25,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:22:25,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:22:25,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:22:25,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:22:25,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:22:25,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:22:25,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:22:25,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:22:25,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:22:25,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:22:25,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:22:25,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:22:25,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:22:25,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:22:25,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 22:22:25,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:22:25,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:22:25,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:22:25,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:22:25,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:22:25,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:22:25,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:22:25,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:22:25,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:22:25,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:22:25,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:22:25,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:22:25,696 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:22:25,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:22:25,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:22:25,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:22:25,698 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:22:25,698 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:22:25,698 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:22:25,698 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:22:25,698 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:22:25,698 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:22:25,698 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:22:25,698 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:22:25,698 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:22:25,699 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:22:25,699 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:22:25,699 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:22:25,699 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:22:25,699 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:22:25,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:22:25,699 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:22:25,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:22:25,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:22:25,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:22:25,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:22:25,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:22:25,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:22:25,700 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:22:25,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:22:25,700 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:22:25,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:22:25,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:22:25,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:22:25,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:22:25,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:22:25,701 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:22:25,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:22:25,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:22:25,701 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:22:25,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:22:25,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:22:25,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:22:25,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:22:25,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:22:25,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:22:25,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:22:25,882 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:22:25,882 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:22:25,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2023-04-02 22:22:26,771 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:22:26,920 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:22:26,921 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2023-04-02 22:22:26,924 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/554742eed/820d1bee15be4dd4b110127ba5f1cf1a/FLAG5bcc089fa [2023-04-02 22:22:26,937 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/554742eed/820d1bee15be4dd4b110127ba5f1cf1a [2023-04-02 22:22:26,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:22:26,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:22:26,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:22:26,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:22:26,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:22:26,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:22:26" (1/1) ... [2023-04-02 22:22:26,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@206924d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:26, skipping insertion in model container [2023-04-02 22:22:26,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:22:26" (1/1) ... [2023-04-02 22:22:26,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:22:26,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:22:27,054 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/loops-crafted-1/mono-crafted_7.c[318,331] [2023-04-02 22:22:27,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:22:27,069 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:22:27,076 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/loops-crafted-1/mono-crafted_7.c[318,331] [2023-04-02 22:22:27,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:22:27,088 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:22:27,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27 WrapperNode [2023-04-02 22:22:27,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:22:27,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:22:27,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:22:27,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:22:27,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27" (1/1) ... [2023-04-02 22:22:27,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27" (1/1) ... [2023-04-02 22:22:27,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27" (1/1) ... [2023-04-02 22:22:27,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27" (1/1) ... [2023-04-02 22:22:27,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27" (1/1) ... [2023-04-02 22:22:27,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27" (1/1) ... [2023-04-02 22:22:27,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27" (1/1) ... [2023-04-02 22:22:27,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27" (1/1) ... [2023-04-02 22:22:27,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:22:27,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:22:27,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:22:27,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:22:27,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27" (1/1) ... [2023-04-02 22:22:27,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:22:27,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:22:27,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 22:22:27,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 22:22:27,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:22:27,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:22:27,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:22:27,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:22:27,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:22:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:22:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:22:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:22:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:22:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:22:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:22:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:22:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:22:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:22:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:22:27,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:22:27,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:22:27,190 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:22:27,191 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:22:27,257 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:22:27,274 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:22:27,274 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:22:27,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:22:27 BoogieIcfgContainer [2023-04-02 22:22:27,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:22:27,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:22:27,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:22:27,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:22:27,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:22:26" (1/3) ... [2023-04-02 22:22:27,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5978dae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:22:27, skipping insertion in model container [2023-04-02 22:22:27,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:22:27" (2/3) ... [2023-04-02 22:22:27,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5978dae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:22:27, skipping insertion in model container [2023-04-02 22:22:27,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:22:27" (3/3) ... [2023-04-02 22:22:27,281 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2023-04-02 22:22:27,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:22:27,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:22:27,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:22:27,329 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;@58181d2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:22:27,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:22:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:22:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 22:22:27,336 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:22:27,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:22:27,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:22:27,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:22:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2129081965, now seen corresponding path program 1 times [2023-04-02 22:22:27,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:22:27,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467145827] [2023-04-02 22:22:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:27,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:22:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:22:27,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:22:27,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467145827] [2023-04-02 22:22:27,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467145827] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:22:27,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:22:27,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:22:27,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472201264] [2023-04-02 22:22:27,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:22:27,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:22:27,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:22:27,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:22:27,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:22:27,521 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:22:27,557 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-02 22:22:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:22:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 22:22:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:22:27,562 INFO L225 Difference]: With dead ends: 31 [2023-04-02 22:22:27,562 INFO L226 Difference]: Without dead ends: 13 [2023-04-02 22:22:27,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:22:27,566 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:22:27,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:22:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-02 22:22:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-04-02 22:22:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-04-02 22:22:27,591 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-04-02 22:22:27,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:22:27,591 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-04-02 22:22:27,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-04-02 22:22:27,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 22:22:27,592 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:22:27,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:22:27,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:22:27,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:22:27,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:22:27,593 INFO L85 PathProgramCache]: Analyzing trace with hash 780476817, now seen corresponding path program 1 times [2023-04-02 22:22:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:22:27,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086272928] [2023-04-02 22:22:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:22:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:22:27,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:22:27,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086272928] [2023-04-02 22:22:27,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086272928] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:22:27,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918363541] [2023-04-02 22:22:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:27,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:27,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:22:27,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:22:27,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:22:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:27,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 22:22:27,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:22:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:22:27,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:22:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:22:27,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918363541] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 22:22:27,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:22:27,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-04-02 22:22:27,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522945245] [2023-04-02 22:22:27,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:22:27,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 22:22:27,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:22:27,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 22:22:27,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-02 22:22:27,953 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:22:28,001 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-04-02 22:22:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:22:28,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 22:22:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:22:28,006 INFO L225 Difference]: With dead ends: 19 [2023-04-02 22:22:28,006 INFO L226 Difference]: Without dead ends: 14 [2023-04-02 22:22:28,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-02 22:22:28,007 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:22:28,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:22:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-02 22:22:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-04-02 22:22:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-04-02 22:22:28,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-04-02 22:22:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:22:28,010 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-04-02 22:22:28,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-04-02 22:22:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 22:22:28,011 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:22:28,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:22:28,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 22:22:28,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:28,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:22:28,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:22:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1952019340, now seen corresponding path program 1 times [2023-04-02 22:22:28,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:22:28,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508884481] [2023-04-02 22:22:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:28,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:22:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:22:28,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:22:28,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508884481] [2023-04-02 22:22:28,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508884481] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:22:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850071021] [2023-04-02 22:22:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:28,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:28,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:22:28,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:22:28,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:22:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:28,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:22:28,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:22:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:22:28,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:22:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:22:28,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850071021] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:22:28,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536851788] [2023-04-02 22:22:28,527 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:22:28,528 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:22:28,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:22:28,537 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:22:28,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:22:28,596 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:22:28,675 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 22:22:28,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:22:28,686 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:22:28,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '305#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:22:28,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:22:28,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:22:28,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-04-02 22:22:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380877814] [2023-04-02 22:22:28,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:22:28,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 22:22:28,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:22:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 22:22:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-04-02 22:22:28,810 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:22:28,856 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-04-02 22:22:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:22:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 22:22:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:22:28,858 INFO L225 Difference]: With dead ends: 25 [2023-04-02 22:22:28,858 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 22:22:28,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-04-02 22:22:28,860 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:22:28,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:22:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 22:22:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-02 22:22:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-04-02 22:22:28,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-04-02 22:22:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:22:28,869 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-04-02 22:22:28,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-04-02 22:22:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 22:22:28,870 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:22:28,870 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:22:28,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:22:29,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 22:22:29,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:22:29,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:22:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash -187518035, now seen corresponding path program 2 times [2023-04-02 22:22:29,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:22:29,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519391509] [2023-04-02 22:22:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:29,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:22:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:29,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:22:29,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519391509] [2023-04-02 22:22:29,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519391509] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:22:29,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781515045] [2023-04-02 22:22:29,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:22:29,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:29,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:22:29,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:22:29,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:22:29,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 22:22:29,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:22:29,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 22:22:29,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:22:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:29,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:22:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:29,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781515045] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:22:29,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323642960] [2023-04-02 22:22:29,309 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:22:29,309 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:22:29,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:22:29,310 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:22:29,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:22:29,323 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:22:29,362 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 22:22:29,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:22:29,372 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:22:29,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '500#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:22:29,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:22:29,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:22:29,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-02 22:22:29,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387721769] [2023-04-02 22:22:29,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:22:29,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 22:22:29,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:22:29,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 22:22:29,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-02 22:22:29,486 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:22:29,511 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-04-02 22:22:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:22:29,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-02 22:22:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:22:29,513 INFO L225 Difference]: With dead ends: 32 [2023-04-02 22:22:29,513 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 22:22:29,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-02 22:22:29,515 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:22:29,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:22:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 22:22:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 22:22:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-02 22:22:29,521 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2023-04-02 22:22:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:22:29,522 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-02 22:22:29,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-02 22:22:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 22:22:29,522 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:22:29,523 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:22:29,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:22:29,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:29,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:22:29,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:22:29,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1922851667, now seen corresponding path program 3 times [2023-04-02 22:22:29,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:22:29,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338240904] [2023-04-02 22:22:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:29,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:22:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:29,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:22:29,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338240904] [2023-04-02 22:22:29,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338240904] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:22:29,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017652998] [2023-04-02 22:22:29,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:22:29,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:29,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:22:29,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:22:29,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:22:29,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:22:29,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:22:29,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 22:22:29,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:22:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:29,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:22:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:30,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017652998] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:22:30,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1497318635] [2023-04-02 22:22:30,174 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:22:30,174 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:22:30,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:22:30,175 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:22:30,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:22:30,192 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:22:30,219 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 22:22:30,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:22:30,225 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:22:30,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '745#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:22:30,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:22:30,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:22:30,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-04-02 22:22:30,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119652491] [2023-04-02 22:22:30,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:22:30,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 22:22:30,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:22:30,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 22:22:30,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-02 22:22:30,325 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:22:30,346 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-04-02 22:22:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 22:22:30,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 22:22:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:22:30,347 INFO L225 Difference]: With dead ends: 40 [2023-04-02 22:22:30,347 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 22:22:30,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-02 22:22:30,348 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:22:30,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:22:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 22:22:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 22:22:30,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-04-02 22:22:30,352 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 21 [2023-04-02 22:22:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:22:30,352 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-04-02 22:22:30,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-04-02 22:22:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 22:22:30,352 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:22:30,352 INFO L195 NwaCegarLoop]: trace histogram [14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:22:30,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 22:22:30,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:30,557 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:22:30,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:22:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2098205011, now seen corresponding path program 4 times [2023-04-02 22:22:30,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:22:30,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878480478] [2023-04-02 22:22:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:22:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:30,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:22:30,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878480478] [2023-04-02 22:22:30,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878480478] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:22:30,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115235402] [2023-04-02 22:22:30,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:22:30,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:30,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:22:30,910 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:22:30,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:22:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:30,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 22:22:30,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:22:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:30,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:22:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:31,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115235402] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:22:31,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601454120] [2023-04-02 22:22:31,387 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:22:31,388 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:22:31,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:22:31,388 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:22:31,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:22:31,398 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:22:31,425 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 22:22:31,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:22:31,431 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:22:31,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1086#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:22:31,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:22:31,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:22:31,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-04-02 22:22:31,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998272717] [2023-04-02 22:22:31,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:22:31,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 22:22:31,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:22:31,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 22:22:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1086, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 22:22:31,572 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:22:31,616 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2023-04-02 22:22:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 22:22:31,617 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-02 22:22:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:22:31,617 INFO L225 Difference]: With dead ends: 56 [2023-04-02 22:22:31,617 INFO L226 Difference]: Without dead ends: 46 [2023-04-02 22:22:31,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1086, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 22:22:31,618 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:22:31,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:22:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-02 22:22:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-04-02 22:22:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2023-04-02 22:22:31,623 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 29 [2023-04-02 22:22:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:22:31,623 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2023-04-02 22:22:31,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2023-04-02 22:22:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 22:22:31,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:22:31,624 INFO L195 NwaCegarLoop]: trace histogram [30, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:22:31,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 22:22:31,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:31,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:22:31,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:22:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash -558722387, now seen corresponding path program 5 times [2023-04-02 22:22:31,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:22:31,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880540927] [2023-04-02 22:22:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:31,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:22:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:32,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:22:32,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880540927] [2023-04-02 22:22:32,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880540927] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:22:32,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678819825] [2023-04-02 22:22:32,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:22:32,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:32,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:22:32,859 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:22:32,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 22:22:32,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-04-02 22:22:32,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:22:32,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 22:22:32,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:22:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:32,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:22:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:34,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678819825] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:22:34,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154671338] [2023-04-02 22:22:34,120 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:22:34,120 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:22:34,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:22:34,120 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:22:34,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:22:34,134 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:22:34,158 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 22:22:34,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:22:34,163 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:22:34,328 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1619#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:22:34,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:22:34,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:22:34,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2023-04-02 22:22:34,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151267868] [2023-04-02 22:22:34,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:22:34,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-04-02 22:22:34,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:22:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-04-02 22:22:34,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2106, Invalid=3150, Unknown=0, NotChecked=0, Total=5256 [2023-04-02 22:22:34,332 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 65 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:22:34,397 INFO L93 Difference]: Finished difference Result 88 states and 121 transitions. [2023-04-02 22:22:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-04-02 22:22:34,397 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-02 22:22:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:22:34,398 INFO L225 Difference]: With dead ends: 88 [2023-04-02 22:22:34,398 INFO L226 Difference]: Without dead ends: 78 [2023-04-02 22:22:34,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2106, Invalid=3150, Unknown=0, NotChecked=0, Total=5256 [2023-04-02 22:22:34,400 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:22:34,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:22:34,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-02 22:22:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-04-02 22:22:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2023-04-02 22:22:34,406 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 45 [2023-04-02 22:22:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:22:34,406 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2023-04-02 22:22:34,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:34,406 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2023-04-02 22:22:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-02 22:22:34,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:22:34,407 INFO L195 NwaCegarLoop]: trace histogram [62, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:22:34,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 22:22:34,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:34,612 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:22:34,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:22:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1356847789, now seen corresponding path program 6 times [2023-04-02 22:22:34,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:22:34,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900813665] [2023-04-02 22:22:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:34,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:22:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:37,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:22:37,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900813665] [2023-04-02 22:22:37,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900813665] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:22:37,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520477366] [2023-04-02 22:22:37,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:22:37,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:37,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:22:37,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:22:37,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 22:22:38,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:22:38,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:22:38,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-02 22:22:38,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:22:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:38,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:22:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:42,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520477366] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:22:42,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108151225] [2023-04-02 22:22:42,109 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:22:42,109 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:22:42,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:22:42,110 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:22:42,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:22:42,119 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:22:42,145 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 22:22:42,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:22:42,155 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:22:42,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2536#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:22:42,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:22:42,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:22:42,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2023-04-02 22:22:42,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272745545] [2023-04-02 22:22:42,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:22:42,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2023-04-02 22:22:42,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:22:42,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2023-04-02 22:22:42,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8282, Invalid=10350, Unknown=0, NotChecked=0, Total=18632 [2023-04-02 22:22:42,401 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 129 states, 129 states have (on average 1.054263565891473) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:42,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:22:42,561 INFO L93 Difference]: Finished difference Result 152 states and 217 transitions. [2023-04-02 22:22:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-04-02 22:22:42,562 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.054263565891473) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-02 22:22:42,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:22:42,566 INFO L225 Difference]: With dead ends: 152 [2023-04-02 22:22:42,566 INFO L226 Difference]: Without dead ends: 142 [2023-04-02 22:22:42,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8282, Invalid=10350, Unknown=0, NotChecked=0, Total=18632 [2023-04-02 22:22:42,570 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:22:42,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:22:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-02 22:22:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-04-02 22:22:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2023-04-02 22:22:42,590 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 77 [2023-04-02 22:22:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:22:42,590 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2023-04-02 22:22:42,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.054263565891473) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:22:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2023-04-02 22:22:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-02 22:22:42,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:22:42,591 INFO L195 NwaCegarLoop]: trace histogram [126, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:22:42,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 22:22:42,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:42,805 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:22:42,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:22:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash -539333971, now seen corresponding path program 7 times [2023-04-02 22:22:42,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:22:42,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423407075] [2023-04-02 22:22:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:22:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:22:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8011 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:54,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:22:54,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423407075] [2023-04-02 22:22:54,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423407075] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:22:54,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955000187] [2023-04-02 22:22:54,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:22:54,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:22:54,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:22:54,593 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:22:54,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 22:22:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:22:54,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 128 conjunts are in the unsatisfiable core [2023-04-02 22:22:54,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:22:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8011 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:22:54,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:23:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8011 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:23:09,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955000187] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:23:09,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713788724] [2023-04-02 22:23:09,348 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:23:09,348 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:23:09,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:23:09,348 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:23:09,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:23:09,358 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:23:09,379 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 22:23:09,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:23:09,384 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:23:09,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4221#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:23:09,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:23:09,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:23:09,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 257 [2023-04-02 22:23:09,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080529809] [2023-04-02 22:23:09,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:23:09,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2023-04-02 22:23:09,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:23:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2023-04-02 22:23:09,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32922, Invalid=37038, Unknown=0, NotChecked=0, Total=69960 [2023-04-02 22:23:09,790 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 257 states, 257 states have (on average 1.027237354085603) internal successors, (264), 257 states have internal predecessors, (264), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:23:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:23:10,216 INFO L93 Difference]: Finished difference Result 280 states and 409 transitions. [2023-04-02 22:23:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2023-04-02 22:23:10,221 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 1.027237354085603) internal successors, (264), 257 states have internal predecessors, (264), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2023-04-02 22:23:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:23:10,223 INFO L225 Difference]: With dead ends: 280 [2023-04-02 22:23:10,223 INFO L226 Difference]: Without dead ends: 270 [2023-04-02 22:23:10,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3558 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=32922, Invalid=37038, Unknown=0, NotChecked=0, Total=69960 [2023-04-02 22:23:10,226 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:23:10,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:23:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-04-02 22:23:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2023-04-02 22:23:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.0075471698113208) internal successors, (267), 265 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:23:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2023-04-02 22:23:10,238 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 141 [2023-04-02 22:23:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:23:10,239 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2023-04-02 22:23:10,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 1.027237354085603) internal successors, (264), 257 states have internal predecessors, (264), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:23:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2023-04-02 22:23:10,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-04-02 22:23:10,241 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:23:10,241 INFO L195 NwaCegarLoop]: trace histogram [254, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:23:10,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 22:23:10,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-02 22:23:10,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:23:10,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:23:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1471182163, now seen corresponding path program 8 times [2023-04-02 22:23:10,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:23:10,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168977617] [2023-04-02 22:23:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:23:10,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:23:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:24:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 32395 backedges. 0 proven. 32385 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:24:00,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:24:00,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168977617] [2023-04-02 22:24:00,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168977617] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:24:00,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565305888] [2023-04-02 22:24:00,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:24:00,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:24:00,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:24:00,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:24:00,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 22:24:01,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 128 check-sat command(s) [2023-04-02 22:24:01,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:24:01,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 256 conjunts are in the unsatisfiable core [2023-04-02 22:24:01,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:24:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32395 backedges. 0 proven. 32385 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:24:01,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:24:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 32395 backedges. 0 proven. 32385 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 22:24:57,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565305888] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:24:57,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1493020804] [2023-04-02 22:24:57,744 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:24:57,744 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:24:57,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:24:57,745 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:24:57,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:24:57,755 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:24:57,775 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 22:24:57,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:24:57,780 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:24:58,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7442#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:24:58,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:24:58,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:24:58,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [257, 257, 257] total 513 [2023-04-02 22:24:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629913789] [2023-04-02 22:24:58,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:24:58,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 513 states [2023-04-02 22:24:58,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:24:58,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 513 interpolants. [2023-04-02 22:24:58,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131354, Invalid=139566, Unknown=0, NotChecked=0, Total=270920 [2023-04-02 22:24:58,547 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand has 513 states, 513 states have (on average 1.01364522417154) internal successors, (520), 513 states have internal predecessors, (520), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:25:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:25:01,429 INFO L93 Difference]: Finished difference Result 536 states and 793 transitions. [2023-04-02 22:25:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 512 states. [2023-04-02 22:25:01,430 INFO L78 Accepts]: Start accepts. Automaton has has 513 states, 513 states have (on average 1.01364522417154) internal successors, (520), 513 states have internal predecessors, (520), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2023-04-02 22:25:01,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:25:01,432 INFO L225 Difference]: With dead ends: 536 [2023-04-02 22:25:01,432 INFO L226 Difference]: Without dead ends: 526 [2023-04-02 22:25:01,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1063 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7142 ImplicationChecksByTransitivity, 71.5s TimeCoverageRelationStatistics Valid=131354, Invalid=139566, Unknown=0, NotChecked=0, Total=270920 [2023-04-02 22:25:01,443 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 22:25:01,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 22:25:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-04-02 22:25:01,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2023-04-02 22:25:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 521 states have (on average 1.0038387715930903) internal successors, (523), 521 states have internal predecessors, (523), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:25:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 527 transitions. [2023-04-02 22:25:01,465 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 527 transitions. Word has length 269 [2023-04-02 22:25:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:25:01,466 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 527 transitions. [2023-04-02 22:25:01,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 513 states, 513 states have (on average 1.01364522417154) internal successors, (520), 513 states have internal predecessors, (520), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:25:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 527 transitions. [2023-04-02 22:25:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2023-04-02 22:25:01,471 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:25:01,471 INFO L195 NwaCegarLoop]: trace histogram [510, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:25:01,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 22:25:01,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 22:25:01,678 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:25:01,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:25:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash -482751827, now seen corresponding path program 9 times [2023-04-02 22:25:01,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:25:01,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185523918] [2023-04-02 22:25:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:25:01,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:25:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat