/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:48:22,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:48:22,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:48:22,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:48:22,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:48:22,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:48:22,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:48:22,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:48:22,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:48:22,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:48:22,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:48:22,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:48:22,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:48:22,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:48:22,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:48:22,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:48:22,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:48:22,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:48:22,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:48:22,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:48:22,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:48:22,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:48:22,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:48:22,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:48:22,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:48:22,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:48:22,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:48:22,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:48:22,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:48:22,980 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:48:22,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:48:22,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:48:22,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:48:22,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:48:22,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:48:22,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:48:22,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:48:22,982 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:48:22,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:48:22,983 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:48:22,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:48:22,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:48:22,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:48:22,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:48:22,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:48:22,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:48:22,984 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:48:22,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:48:22,984 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:48:22,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:48:22,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:48:22,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:48:22,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:48:22,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:22,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:48:22,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:48:22,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:48:22,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:48:22,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:48:22,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:48:22,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:48:22,986 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:48:22,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:48:22,986 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:48:22,987 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:48:23,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:48:23,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:48:23,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:48:23,217 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:48:23,219 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:48:23,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label16.c [2023-03-30 23:48:24,422 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:48:24,968 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:48:24,969 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label16.c [2023-03-30 23:48:25,011 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e2e0ed0/d246bc4f08374c8ca0938ee16efa224a/FLAGfd5ca8b67 [2023-03-30 23:48:25,027 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8e2e0ed0/d246bc4f08374c8ca0938ee16efa224a [2023-03-30 23:48:25,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:48:25,031 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:48:25,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:25,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:48:25,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:48:25,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:25" (1/1) ... [2023-03-30 23:48:25,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d85279e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:25, skipping insertion in model container [2023-03-30 23:48:25,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:48:25" (1/1) ... [2023-03-30 23:48:25,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:48:25,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:48:25,503 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/eca-rers2012/Problem19_label16.c[6966,6979] [2023-03-30 23:48:26,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:26,628 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:48:26,657 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/eca-rers2012/Problem19_label16.c[6966,6979] [2023-03-30 23:48:27,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:48:27,388 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:48:27,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27 WrapperNode [2023-03-30 23:48:27,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:48:27,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:48:27,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:48:27,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:48:27,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27" (1/1) ... [2023-03-30 23:48:27,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27" (1/1) ... [2023-03-30 23:48:27,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27" (1/1) ... [2023-03-30 23:48:27,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27" (1/1) ... [2023-03-30 23:48:27,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27" (1/1) ... [2023-03-30 23:48:27,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27" (1/1) ... [2023-03-30 23:48:27,728 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27" (1/1) ... [2023-03-30 23:48:27,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27" (1/1) ... [2023-03-30 23:48:27,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:48:27,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:48:27,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:48:27,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:48:27,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27" (1/1) ... [2023-03-30 23:48:27,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:48:27,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:48:27,932 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) [2023-03-30 23:48:27,939 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 [2023-03-30 23:48:27,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:48:27,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:48:27,974 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:48:27,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:48:27,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:48:27,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:48:27,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:48:27,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:48:27,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:48:27,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:48:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:48:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:48:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:48:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:48:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:48:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:48:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:48:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:48:28,059 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:48:28,062 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:48:35,014 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:48:35,039 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:48:35,039 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:48:35,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:48:35 BoogieIcfgContainer [2023-03-30 23:48:35,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:48:35,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:48:35,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:48:35,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:48:35,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:48:25" (1/3) ... [2023-03-30 23:48:35,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ce7790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:48:35, skipping insertion in model container [2023-03-30 23:48:35,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:48:27" (2/3) ... [2023-03-30 23:48:35,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ce7790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:48:35, skipping insertion in model container [2023-03-30 23:48:35,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:48:35" (3/3) ... [2023-03-30 23:48:35,050 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label16.c [2023-03-30 23:48:35,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:48:35,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:48:35,137 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:48:35,142 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=PETRI_NET, 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;@7b1d338b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:48:35,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:48:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 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) [2023-03-30 23:48:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-30 23:48:35,158 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:35,158 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:48:35,159 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:35,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1951602784, now seen corresponding path program 1 times [2023-03-30 23:48:35,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:35,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154283435] [2023-03-30 23:48:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:35,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:35,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:35,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154283435] [2023-03-30 23:48:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154283435] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:35,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:35,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:48:35,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504707180] [2023-03-30 23:48:35,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:35,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:48:35,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:35,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:48:35,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:48:35,853 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 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 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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) [2023-03-30 23:48:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:48:47,032 INFO L93 Difference]: Finished difference Result 5076 states and 9543 transitions. [2023-03-30 23:48:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:48:47,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 59 [2023-03-30 23:48:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:48:47,067 INFO L225 Difference]: With dead ends: 5076 [2023-03-30 23:48:47,067 INFO L226 Difference]: Without dead ends: 3219 [2023-03-30 23:48:47,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:48:47,080 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4635 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 7327 mSolverCounterSat, 1544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4635 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1544 IncrementalHoareTripleChecker+Valid, 7327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:48:47,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4635 Valid, 384 Invalid, 8871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1544 Valid, 7327 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2023-03-30 23:48:47,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2023-03-30 23:48:47,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3194. [2023-03-30 23:48:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3154 states have (on average 1.592263792010146) internal successors, (5022), 3156 states have internal predecessors, (5022), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (37), 23 states have call predecessors, (37), 13 states have call successors, (37) [2023-03-30 23:48:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 5073 transitions. [2023-03-30 23:48:47,243 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 5073 transitions. Word has length 59 [2023-03-30 23:48:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:48:47,244 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 5073 transitions. [2023-03-30 23:48:47,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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) [2023-03-30 23:48:47,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 5073 transitions. [2023-03-30 23:48:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-03-30 23:48:47,261 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:48:47,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2023-03-30 23:48:47,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:48:47,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:48:47,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:48:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2130732488, now seen corresponding path program 1 times [2023-03-30 23:48:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:48:47,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474394104] [2023-03-30 23:48:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:48:47,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:48:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:47,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:48:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:47,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:48:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:48:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:48:47,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:48:47,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474394104] [2023-03-30 23:48:47,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474394104] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:48:47,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:48:47,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:48:47,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263917325] [2023-03-30 23:48:47,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:48:47,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:48:47,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:48:47,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:48:47,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:48:47,697 INFO L87 Difference]: Start difference. First operand 3194 states and 5073 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:49:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:14,814 INFO L93 Difference]: Finished difference Result 20617 states and 33713 transitions. [2023-03-30 23:49:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:49:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 130 [2023-03-30 23:49:14,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:14,905 INFO L225 Difference]: With dead ends: 20617 [2023-03-30 23:49:14,905 INFO L226 Difference]: Without dead ends: 17429 [2023-03-30 23:49:14,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:49:14,924 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 11622 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 28036 mSolverCounterSat, 3775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11622 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 31811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3775 IncrementalHoareTripleChecker+Valid, 28036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:14,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11622 Valid, 1043 Invalid, 31811 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3775 Valid, 28036 Invalid, 0 Unknown, 0 Unchecked, 26.2s Time] [2023-03-30 23:49:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2023-03-30 23:49:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 17373. [2023-03-30 23:49:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17373 states, 17154 states have (on average 1.316544246239944) internal successors, (22584), 17166 states have internal predecessors, (22584), 74 states have call successors, (74), 74 states have call predecessors, (74), 144 states have return successors, (810), 132 states have call predecessors, (810), 73 states have call successors, (810) [2023-03-30 23:49:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17373 states to 17373 states and 23468 transitions. [2023-03-30 23:49:15,371 INFO L78 Accepts]: Start accepts. Automaton has 17373 states and 23468 transitions. Word has length 130 [2023-03-30 23:49:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:15,373 INFO L495 AbstractCegarLoop]: Abstraction has 17373 states and 23468 transitions. [2023-03-30 23:49:15,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:49:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 17373 states and 23468 transitions. [2023-03-30 23:49:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-03-30 23:49:15,377 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:15,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-03-30 23:49:15,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:49:15,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:15,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:15,378 INFO L85 PathProgramCache]: Analyzing trace with hash 618655312, now seen corresponding path program 1 times [2023-03-30 23:49:15,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:15,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260188934] [2023-03-30 23:49:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:15,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:15,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:15,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:49:15,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:15,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260188934] [2023-03-30 23:49:15,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260188934] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:15,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:15,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:49:15,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521064183] [2023-03-30 23:49:15,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:15,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:49:15,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:49:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:49:15,949 INFO L87 Difference]: Start difference. First operand 17373 states and 23468 transitions. Second operand has 7 states, 6 states have (on average 25.666666666666668) internal successors, (154), 4 states have internal predecessors, (154), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)