/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 IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:16:06,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:16:06,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:16:06,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:16:06,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:16:06,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:16:06,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:16:06,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:16:06,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:16:06,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:16:06,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:16:06,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:16:06,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:16:06,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:16:06,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:16:06,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:16:06,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 00:16:06,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:16:06,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:16:06,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:16:06,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 00:16:06,822 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:16:06,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:16:06,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:16:06,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:16:06,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:16:06,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:16:06,824 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:16:06,824 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:16:06,824 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:16:06,824 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:16:06,825 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:16:06,825 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:16:06,825 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:16:06,825 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:16:06,826 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:16:06,826 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:16:06,826 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:16:06,826 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:16:06,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:16:06,827 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:16:06,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:16:06,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:16:06,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:16:06,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:16:06,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:16:06,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:16:06,828 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:16:06,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:16:06,828 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:16:06,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:16:06,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:16:06,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:16:06,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:16:06,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:16:06,829 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:16:06,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:16:06,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:16:06,830 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:16:06,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:16:06,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:16:06,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:16:06,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:16:07,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:16:07,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:16:07,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:16:07,103 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:16:07,104 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:16:07,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2023-04-01 00:16:08,262 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:16:08,479 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:16:08,480 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2023-04-01 00:16:08,488 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5979d814/2af3523e28d1436582bed483ffe26781/FLAGdce8e4576 [2023-04-01 00:16:08,501 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5979d814/2af3523e28d1436582bed483ffe26781 [2023-04-01 00:16:08,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:16:08,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:16:08,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:16:08,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:16:08,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:16:08,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53240532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08, skipping insertion in model container [2023-04-01 00:16:08,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:16:08,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:16:08,751 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/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2023-04-01 00:16:08,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:16:08,765 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:16:08,813 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/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2023-04-01 00:16:08,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:16:08,828 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:16:08,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08 WrapperNode [2023-04-01 00:16:08,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:16:08,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:16:08,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:16:08,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:16:08,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,878 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:16:08,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:16:08,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:16:08,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:16:08,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08" (1/1) ... [2023-04-01 00:16:08,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:16:08,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:16:08,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 00:16:08,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 00:16:08,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:16:08,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:16:08,954 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:16:08,954 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 00:16:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 00:16:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 00:16:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 00:16:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 00:16:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:16:08,955 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 00:16:08,955 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:16:08,955 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:16:08,956 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:16:08,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:16:08,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:16:08,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:16:08,956 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:16:08,956 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:16:08,956 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:16:08,956 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:16:08,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:16:09,066 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:16:09,089 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:16:09,685 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:16:10,124 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:16:10,125 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 00:16:10,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:16:10 BoogieIcfgContainer [2023-04-01 00:16:10,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:16:10,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:16:10,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:16:10,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:16:10,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:16:08" (1/3) ... [2023-04-01 00:16:10,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be3f3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:16:10, skipping insertion in model container [2023-04-01 00:16:10,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:16:08" (2/3) ... [2023-04-01 00:16:10,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be3f3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:16:10, skipping insertion in model container [2023-04-01 00:16:10,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:16:10" (3/3) ... [2023-04-01 00:16:10,139 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2023-04-01 00:16:10,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:16:10,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:16:10,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:16:10,211 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;@2a7c7504, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:16:10,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:16:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 00:16:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 00:16:10,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:16:10,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:16:10,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:16:10,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:16:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash -49447829, now seen corresponding path program 1 times [2023-04-01 00:16:10,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:16:10,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438559726] [2023-04-01 00:16:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:16:10,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:16:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:16:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:16:13,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:16:13,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438559726] [2023-04-01 00:16:13,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438559726] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:16:13,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:16:13,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 00:16:13,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550107378] [2023-04-01 00:16:13,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:16:13,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 00:16:13,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:16:13,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 00:16:13,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:16:13,200 INFO L87 Difference]: Start difference. First operand has 47 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:16:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:16:13,988 INFO L93 Difference]: Finished difference Result 146 states and 187 transitions. [2023-04-01 00:16:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 00:16:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-04-01 00:16:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:16:14,000 INFO L225 Difference]: With dead ends: 146 [2023-04-01 00:16:14,001 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 00:16:14,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-04-01 00:16:14,007 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 467 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:16:14,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 104 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:16:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 00:16:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 70. [2023-04-01 00:16:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.434782608695652) internal successors, (66), 47 states have internal predecessors, (66), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 00:16:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2023-04-01 00:16:14,060 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 30 [2023-04-01 00:16:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:16:14,061 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2023-04-01 00:16:14,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:16:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2023-04-01 00:16:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 00:16:14,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:16:14,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:16:14,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:16:14,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:16:14,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:16:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash -407957214, now seen corresponding path program 1 times [2023-04-01 00:16:14,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:16:14,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022685051] [2023-04-01 00:16:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:16:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:16:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:16:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:16:15,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:16:15,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022685051] [2023-04-01 00:16:15,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022685051] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:16:15,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:16:15,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 00:16:15,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319697925] [2023-04-01 00:16:15,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:16:15,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 00:16:15,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:16:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 00:16:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-04-01 00:16:15,941 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:16:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:16:16,752 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2023-04-01 00:16:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 00:16:16,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 31 [2023-04-01 00:16:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:16:16,755 INFO L225 Difference]: With dead ends: 159 [2023-04-01 00:16:16,755 INFO L226 Difference]: Without dead ends: 117 [2023-04-01 00:16:16,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 00:16:16,757 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 346 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:16:16,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 120 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:16:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-01 00:16:16,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 70. [2023-04-01 00:16:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 47 states have internal predecessors, (65), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:16:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-04-01 00:16:16,781 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 31 [2023-04-01 00:16:16,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:16:16,782 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-04-01 00:16:16,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:16:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-04-01 00:16:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 00:16:16,783 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:16:16,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:16:16,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:16:16,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:16:16,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:16:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1825102156, now seen corresponding path program 1 times [2023-04-01 00:16:16,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:16:16,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125060487] [2023-04-01 00:16:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:16:16,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:16:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:16:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:16:17,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:16:17,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125060487] [2023-04-01 00:16:17,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125060487] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:16:17,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:16:17,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:16:17,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876015637] [2023-04-01 00:16:17,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:16:17,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:16:17,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:16:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:16:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:16:17,926 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:16:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:16:18,316 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2023-04-01 00:16:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:16:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2023-04-01 00:16:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:16:18,318 INFO L225 Difference]: With dead ends: 139 [2023-04-01 00:16:18,318 INFO L226 Difference]: Without dead ends: 102 [2023-04-01 00:16:18,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 00:16:18,320 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 113 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:16:18,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 74 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:16:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-01 00:16:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2023-04-01 00:16:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:16:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2023-04-01 00:16:18,350 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 32 [2023-04-01 00:16:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:16:18,351 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2023-04-01 00:16:18,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:16:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2023-04-01 00:16:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 00:16:18,352 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:16:18,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:16:18,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:16:18,354 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:16:18,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:16:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1700210997, now seen corresponding path program 1 times [2023-04-01 00:16:18,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:16:18,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165373799] [2023-04-01 00:16:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:16:18,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:16:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:16:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:16:19,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:16:19,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165373799] [2023-04-01 00:16:19,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165373799] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:16:19,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:16:19,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:16:19,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692271970] [2023-04-01 00:16:19,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:16:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:16:19,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:16:19,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:16:19,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:16:19,489 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:16:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:16:19,821 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2023-04-01 00:16:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:16:19,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2023-04-01 00:16:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:16:19,824 INFO L225 Difference]: With dead ends: 145 [2023-04-01 00:16:19,824 INFO L226 Difference]: Without dead ends: 108 [2023-04-01 00:16:19,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 00:16:19,825 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 177 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:16:19,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 68 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:16:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-01 00:16:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2023-04-01 00:16:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 47 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:16:19,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2023-04-01 00:16:19,845 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 33 [2023-04-01 00:16:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:16:19,845 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2023-04-01 00:16:19,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:16:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2023-04-01 00:16:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 00:16:19,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:16:19,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:16:19,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:16:19,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:16:19,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:16:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1413027091, now seen corresponding path program 1 times [2023-04-01 00:16:19,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:16:19,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540183839] [2023-04-01 00:16:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:16:19,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:16:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:16:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:16:21,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:16:21,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540183839] [2023-04-01 00:16:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540183839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:16:21,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:16:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 00:16:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691106104] [2023-04-01 00:16:21,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:16:21,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 00:16:21,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:16:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 00:16:21,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:16:21,793 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 15 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:16:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:16:22,458 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2023-04-01 00:16:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 00:16:22,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2023-04-01 00:16:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:16:22,460 INFO L225 Difference]: With dead ends: 146 [2023-04-01 00:16:22,460 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 00:16:22,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-04-01 00:16:22,462 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 298 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:16:22,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 103 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:16:22,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 00:16:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2023-04-01 00:16:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 49 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:16:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2023-04-01 00:16:22,482 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 35 [2023-04-01 00:16:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:16:22,482 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2023-04-01 00:16:22,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 00:16:22,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2023-04-01 00:16:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 00:16:22,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:16:22,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:16:22,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:16:22,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:16:22,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:16:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash -198132245, now seen corresponding path program 1 times [2023-04-01 00:16:22,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:16:22,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532688649] [2023-04-01 00:16:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:16:22,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:16:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:16:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:16:23,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:16:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532688649] [2023-04-01 00:16:23,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532688649] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:16:23,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:16:23,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:16:23,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875988009] [2023-04-01 00:16:23,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:16:23,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:16:23,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:16:23,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:16:23,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:16:23,080 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:16:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:16:23,367 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2023-04-01 00:16:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 00:16:23,368 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2023-04-01 00:16:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:16:23,369 INFO L225 Difference]: With dead ends: 144 [2023-04-01 00:16:23,369 INFO L226 Difference]: Without dead ends: 100 [2023-04-01 00:16:23,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-04-01 00:16:23,370 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 137 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:16:23,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 67 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:16:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-01 00:16:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2023-04-01 00:16:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:16:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2023-04-01 00:16:23,389 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 36 [2023-04-01 00:16:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:16:23,390 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2023-04-01 00:16:23,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 00:16:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2023-04-01 00:16:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 00:16:23,390 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:16:23,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:16:23,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:16:23,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:16:23,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:16:23,391 INFO L85 PathProgramCache]: Analyzing trace with hash 673022833, now seen corresponding path program 1 times [2023-04-01 00:16:23,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:16:23,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199244643] [2023-04-01 00:16:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:16:23,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:16:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:16:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:16:25,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:16:25,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199244643] [2023-04-01 00:16:25,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199244643] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:16:25,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:16:25,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-01 00:16:25,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535648316] [2023-04-01 00:16:25,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:16:25,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 00:16:25,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:16:25,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 00:16:25,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:16:25,705 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 00:16:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:16:26,875 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2023-04-01 00:16:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 00:16:26,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2023-04-01 00:16:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:16:26,876 INFO L225 Difference]: With dead ends: 156 [2023-04-01 00:16:26,876 INFO L226 Difference]: Without dead ends: 117 [2023-04-01 00:16:26,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 00:16:26,881 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 325 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:16:26,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 115 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 00:16:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-01 00:16:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 71. [2023-04-01 00:16:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:16:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-04-01 00:16:26,906 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 38 [2023-04-01 00:16:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:16:26,907 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-04-01 00:16:26,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 00:16:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-04-01 00:16:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 00:16:26,909 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:16:26,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:16:26,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:16:26,910 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:16:26,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:16:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1071270403, now seen corresponding path program 1 times [2023-04-01 00:16:26,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:16:26,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179080256] [2023-04-01 00:16:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:16:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:16:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:16:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:16:27,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:16:27,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179080256] [2023-04-01 00:16:27,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179080256] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:16:27,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:16:27,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:16:27,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788165353] [2023-04-01 00:16:27,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:16:27,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:16:27,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:16:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:16:27,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:16:27,276 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 00:16:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:16:27,478 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2023-04-01 00:16:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:16:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-04-01 00:16:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:16:27,479 INFO L225 Difference]: With dead ends: 106 [2023-04-01 00:16:27,479 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 00:16:27,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-01 00:16:27,481 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:16:27,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 408 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:16:27,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 00:16:27,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2023-04-01 00:16:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-01 00:16:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-04-01 00:16:27,511 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 39 [2023-04-01 00:16:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:16:27,511 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-04-01 00:16:27,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 00:16:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-04-01 00:16:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 00:16:27,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:16:27,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:16:27,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:16:27,516 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:16:27,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:16:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1453351483, now seen corresponding path program 1 times [2023-04-01 00:16:27,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:16:27,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183325206] [2023-04-01 00:16:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:16:27,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:16:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:16:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 00:16:30,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:16:30,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183325206] [2023-04-01 00:16:30,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183325206] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:16:30,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684360021] [2023-04-01 00:16:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:16:30,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:16:30,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:16:30,629 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:16:30,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 00:16:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:16:30,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 80 conjunts are in the unsatisfiable core [2023-04-01 00:16:30,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:16:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:16:43,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 00:16:44,324 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 7864 disjunctions. This might take some time... [2023-04-01 00:16:47,409 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 7864 disjunctions.