./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f34e139d311e566fb184ea47633b96986afa15e7a6ae2ebeede6340c715d2189 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 09:04:55,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 09:04:55,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 09:04:55,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 09:04:55,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 09:04:55,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 09:04:55,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 09:04:55,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 09:04:55,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 09:04:55,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 09:04:55,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 09:04:55,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 09:04:55,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 09:04:55,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 09:04:55,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 09:04:55,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 09:04:55,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 09:04:55,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 09:04:55,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 09:04:55,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 09:04:55,919 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 09:04:55,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 09:04:55,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 09:04:55,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 09:04:55,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 09:04:55,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 09:04:55,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 09:04:55,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 09:04:55,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 09:04:55,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 09:04:55,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 09:04:55,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 09:04:55,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 09:04:55,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 09:04:55,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 09:04:55,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 09:04:55,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 09:04:55,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 09:04:55,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 09:04:55,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 09:04:55,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 09:04:55,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 09:04:55,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 09:04:55,961 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 09:04:55,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 09:04:55,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 09:04:55,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 09:04:55,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 09:04:55,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 09:04:55,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 09:04:55,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 09:04:55,963 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 09:04:55,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 09:04:55,964 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 09:04:55,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 09:04:55,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 09:04:55,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 09:04:55,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 09:04:55,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 09:04:55,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 09:04:55,965 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 09:04:55,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 09:04:55,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 09:04:55,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 09:04:55,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 09:04:55,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 09:04:55,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 09:04:55,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:04:55,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 09:04:55,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 09:04:55,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 09:04:55,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 09:04:55,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 09:04:55,968 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 09:04:55,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 09:04:55,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 09:04:55,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f34e139d311e566fb184ea47633b96986afa15e7a6ae2ebeede6340c715d2189 [2022-07-12 09:04:56,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 09:04:56,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 09:04:56,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 09:04:56,165 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 09:04:56,165 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 09:04:56,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c [2022-07-12 09:04:56,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/978412f81/d82fa423eccb42c9939a47f9b916b563/FLAG849c376e8 [2022-07-12 09:04:56,741 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 09:04:56,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c [2022-07-12 09:04:56,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/978412f81/d82fa423eccb42c9939a47f9b916b563/FLAG849c376e8 [2022-07-12 09:04:57,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/978412f81/d82fa423eccb42c9939a47f9b916b563 [2022-07-12 09:04:57,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 09:04:57,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 09:04:57,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 09:04:57,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 09:04:57,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 09:04:57,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:04:57" (1/1) ... [2022-07-12 09:04:57,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3a461f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:57, skipping insertion in model container [2022-07-12 09:04:57,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:04:57" (1/1) ... [2022-07-12 09:04:57,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 09:04:57,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 09:04:57,573 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[8653,8666] [2022-07-12 09:04:57,599 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[14208,14221] [2022-07-12 09:04:58,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:04:58,093 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 09:04:58,108 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[8653,8666] [2022-07-12 09:04:58,113 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[14208,14221] [2022-07-12 09:04:58,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:04:58,435 INFO L208 MainTranslator]: Completed translation [2022-07-12 09:04:58,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58 WrapperNode [2022-07-12 09:04:58,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 09:04:58,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 09:04:58,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 09:04:58,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 09:04:58,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (1/1) ... [2022-07-12 09:04:58,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (1/1) ... [2022-07-12 09:04:58,718 INFO L137 Inliner]: procedures = 34, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 5032 [2022-07-12 09:04:58,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 09:04:58,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 09:04:58,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 09:04:58,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 09:04:58,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (1/1) ... [2022-07-12 09:04:58,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (1/1) ... [2022-07-12 09:04:58,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (1/1) ... [2022-07-12 09:04:58,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (1/1) ... [2022-07-12 09:04:58,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (1/1) ... [2022-07-12 09:04:58,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (1/1) ... [2022-07-12 09:04:58,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (1/1) ... [2022-07-12 09:04:59,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 09:04:59,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 09:04:59,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 09:04:59,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 09:04:59,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (1/1) ... [2022-07-12 09:04:59,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:04:59,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:04:59,099 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) [2022-07-12 09:04:59,119 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 [2022-07-12 09:04:59,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 09:04:59,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 09:04:59,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 09:04:59,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 09:04:59,284 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 09:04:59,288 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 09:05:02,011 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 09:05:02,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 09:05:02,021 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 09:05:02,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:05:02 BoogieIcfgContainer [2022-07-12 09:05:02,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 09:05:02,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 09:05:02,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 09:05:02,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 09:05:02,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 09:04:57" (1/3) ... [2022-07-12 09:05:02,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2b7624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:05:02, skipping insertion in model container [2022-07-12 09:05:02,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:04:58" (2/3) ... [2022-07-12 09:05:02,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b2b7624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:05:02, skipping insertion in model container [2022-07-12 09:05:02,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:05:02" (3/3) ... [2022-07-12 09:05:02,029 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c [2022-07-12 09:05:02,039 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 09:05:02,040 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 09:05:02,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 09:05:02,089 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@437e9d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f896046 [2022-07-12 09:05:02,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 09:05:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 09:05:02,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:02,113 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] [2022-07-12 09:05:02,114 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:02,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2022-07-12 09:05:02,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:02,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395407815] [2022-07-12 09:05:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:02,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:02,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395407815] [2022-07-12 09:05:02,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395407815] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:02,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:02,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 09:05:02,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108723967] [2022-07-12 09:05:02,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:02,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 09:05:02,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 09:05:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:05:02,276 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:02,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:02,330 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2022-07-12 09:05:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 09:05:02,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-12 09:05:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:02,350 INFO L225 Difference]: With dead ends: 1757 [2022-07-12 09:05:02,355 INFO L226 Difference]: Without dead ends: 827 [2022-07-12 09:05:02,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:05:02,368 INFO L413 NwaCegarLoop]: 1627 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:02,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-07-12 09:05:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2022-07-12 09:05:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.8909090909090909) internal successors, (1560), 826 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2022-07-12 09:05:02,441 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2022-07-12 09:05:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:02,441 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2022-07-12 09:05:02,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2022-07-12 09:05:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 09:05:02,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:02,443 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] [2022-07-12 09:05:02,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 09:05:02,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:02,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2022-07-12 09:05:02,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:02,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933816720] [2022-07-12 09:05:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:02,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:02,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933816720] [2022-07-12 09:05:02,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933816720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:02,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:02,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:05:02,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474468327] [2022-07-12 09:05:02,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:02,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 09:05:02,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:02,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 09:05:02,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:05:02,506 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:02,598 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2022-07-12 09:05:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:05:02,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-12 09:05:02,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:02,603 INFO L225 Difference]: With dead ends: 919 [2022-07-12 09:05:02,603 INFO L226 Difference]: Without dead ends: 871 [2022-07-12 09:05:02,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:05:02,605 INFO L413 NwaCegarLoop]: 1556 mSDtfsCounter, 71 mSDsluCounter, 4640 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6196 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:02,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 6196 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-07-12 09:05:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2022-07-12 09:05:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.863030303030303) internal successors, (1537), 826 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2022-07-12 09:05:02,632 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2022-07-12 09:05:02,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:02,632 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2022-07-12 09:05:02,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2022-07-12 09:05:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 09:05:02,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:02,634 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] [2022-07-12 09:05:02,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 09:05:02,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:02,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:02,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1620709547, now seen corresponding path program 1 times [2022-07-12 09:05:02,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:02,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334148901] [2022-07-12 09:05:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:02,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334148901] [2022-07-12 09:05:02,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334148901] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:02,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:02,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 09:05:02,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808888131] [2022-07-12 09:05:02,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:02,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:05:02,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:05:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:02,721 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:05,261 INFO L93 Difference]: Finished difference Result 2331 states and 4410 transitions. [2022-07-12 09:05:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:05:05,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-12 09:05:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:05,267 INFO L225 Difference]: With dead ends: 2331 [2022-07-12 09:05:05,267 INFO L226 Difference]: Without dead ends: 1578 [2022-07-12 09:05:05,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:05,269 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 868 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:05,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 526 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-12 09:05:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2022-07-12 09:05:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2022-07-12 09:05:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1576 states have (on average 1.6269035532994924) internal successors, (2564), 1577 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2564 transitions. [2022-07-12 09:05:05,292 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2564 transitions. Word has length 48 [2022-07-12 09:05:05,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:05,293 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 2564 transitions. [2022-07-12 09:05:05,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2564 transitions. [2022-07-12 09:05:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:05:05,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:05,294 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] [2022-07-12 09:05:05,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 09:05:05,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2022-07-12 09:05:05,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:05,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664840744] [2022-07-12 09:05:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:05,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:05,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:05,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664840744] [2022-07-12 09:05:05,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664840744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:05,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:05,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:05:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270658236] [2022-07-12 09:05:05,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:05,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:05:05,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:05,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:05:05,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:05,357 INFO L87 Difference]: Start difference. First operand 1578 states and 2564 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:05,376 INFO L93 Difference]: Finished difference Result 1660 states and 2692 transitions. [2022-07-12 09:05:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:05:05,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-12 09:05:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:05,382 INFO L225 Difference]: With dead ends: 1660 [2022-07-12 09:05:05,382 INFO L226 Difference]: Without dead ends: 1616 [2022-07-12 09:05:05,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:05,384 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:05,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:05,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-07-12 09:05:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2022-07-12 09:05:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1612 states have (on average 1.6259305210918114) internal successors, (2621), 1613 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2621 transitions. [2022-07-12 09:05:05,407 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2621 transitions. Word has length 52 [2022-07-12 09:05:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:05,407 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2621 transitions. [2022-07-12 09:05:05,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2621 transitions. [2022-07-12 09:05:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:05:05,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:05,409 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] [2022-07-12 09:05:05,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 09:05:05,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:05,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2022-07-12 09:05:05,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:05,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923044352] [2022-07-12 09:05:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:05,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:05,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:05,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923044352] [2022-07-12 09:05:05,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923044352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:05,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:05,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:05:05,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775870497] [2022-07-12 09:05:05,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:05,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:05:05,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:05,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:05:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:05,460 INFO L87 Difference]: Start difference. First operand 1614 states and 2621 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:05,481 INFO L93 Difference]: Finished difference Result 1762 states and 2853 transitions. [2022-07-12 09:05:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:05:05,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-12 09:05:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:05,486 INFO L225 Difference]: With dead ends: 1762 [2022-07-12 09:05:05,486 INFO L226 Difference]: Without dead ends: 1682 [2022-07-12 09:05:05,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:05,488 INFO L413 NwaCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:05,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-07-12 09:05:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2022-07-12 09:05:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1678 states have (on average 1.6233611442193088) internal successors, (2724), 1679 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2724 transitions. [2022-07-12 09:05:05,515 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2724 transitions. Word has length 52 [2022-07-12 09:05:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:05,515 INFO L495 AbstractCegarLoop]: Abstraction has 1680 states and 2724 transitions. [2022-07-12 09:05:05,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2724 transitions. [2022-07-12 09:05:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:05:05,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:05,516 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] [2022-07-12 09:05:05,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 09:05:05,517 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2022-07-12 09:05:05,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:05,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245680193] [2022-07-12 09:05:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:05,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:05,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:05,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245680193] [2022-07-12 09:05:05,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245680193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:05,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:05,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:05:05,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564104134] [2022-07-12 09:05:05,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:05,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:05:05,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:05,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:05:05,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:05,596 INFO L87 Difference]: Start difference. First operand 1680 states and 2724 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:05,619 INFO L93 Difference]: Finished difference Result 1948 states and 3142 transitions. [2022-07-12 09:05:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:05:05,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-12 09:05:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:05,625 INFO L225 Difference]: With dead ends: 1948 [2022-07-12 09:05:05,625 INFO L226 Difference]: Without dead ends: 1802 [2022-07-12 09:05:05,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:05,627 INFO L413 NwaCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:05,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-07-12 09:05:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2022-07-12 09:05:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.617352614015573) internal successors, (2908), 1799 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2908 transitions. [2022-07-12 09:05:05,657 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2908 transitions. Word has length 52 [2022-07-12 09:05:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:05,658 INFO L495 AbstractCegarLoop]: Abstraction has 1800 states and 2908 transitions. [2022-07-12 09:05:05,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2908 transitions. [2022-07-12 09:05:05,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:05:05,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:05,659 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] [2022-07-12 09:05:05,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 09:05:05,659 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2022-07-12 09:05:05,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:05,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641327310] [2022-07-12 09:05:05,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:05,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:05,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:05,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641327310] [2022-07-12 09:05:05,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641327310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:05,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:05,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:05:05,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598706367] [2022-07-12 09:05:05,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:05,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:05:05,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:05,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:05:05,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:05,689 INFO L87 Difference]: Start difference. First operand 1800 states and 2908 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:05,716 INFO L93 Difference]: Finished difference Result 2284 states and 3654 transitions. [2022-07-12 09:05:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:05:05,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-12 09:05:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:05,724 INFO L225 Difference]: With dead ends: 2284 [2022-07-12 09:05:05,725 INFO L226 Difference]: Without dead ends: 2018 [2022-07-12 09:05:05,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:05,726 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:05,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-07-12 09:05:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2022-07-12 09:05:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2014 states have (on average 1.6047666335650448) internal successors, (3232), 2015 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3232 transitions. [2022-07-12 09:05:05,766 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3232 transitions. Word has length 52 [2022-07-12 09:05:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:05,766 INFO L495 AbstractCegarLoop]: Abstraction has 2016 states and 3232 transitions. [2022-07-12 09:05:05,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3232 transitions. [2022-07-12 09:05:05,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:05:05,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:05,767 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] [2022-07-12 09:05:05,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 09:05:05,767 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2022-07-12 09:05:05,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:05,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953822427] [2022-07-12 09:05:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:05,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:05,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:05,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953822427] [2022-07-12 09:05:05,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953822427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:05,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:05,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:05:05,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032780993] [2022-07-12 09:05:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:05,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:05:05,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:05,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:05:05,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:05:05,809 INFO L87 Difference]: Start difference. First operand 2016 states and 3232 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:06,034 INFO L93 Difference]: Finished difference Result 5872 states and 9128 transitions. [2022-07-12 09:05:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 09:05:06,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-12 09:05:06,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:06,050 INFO L225 Difference]: With dead ends: 5872 [2022-07-12 09:05:06,051 INFO L226 Difference]: Without dead ends: 5390 [2022-07-12 09:05:06,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-12 09:05:06,054 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:06,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:06,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2022-07-12 09:05:06,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2022-07-12 09:05:06,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2494 states have (on average 1.578187650360866) internal successors, (3936), 2495 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3936 transitions. [2022-07-12 09:05:06,156 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3936 transitions. Word has length 52 [2022-07-12 09:05:06,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:06,158 INFO L495 AbstractCegarLoop]: Abstraction has 2496 states and 3936 transitions. [2022-07-12 09:05:06,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3936 transitions. [2022-07-12 09:05:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 09:05:06,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:06,164 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] [2022-07-12 09:05:06,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 09:05:06,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:06,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2022-07-12 09:05:06,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:06,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650391191] [2022-07-12 09:05:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:06,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:06,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650391191] [2022-07-12 09:05:06,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650391191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:06,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:06,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:05:06,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330358624] [2022-07-12 09:05:06,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:06,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:05:06,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:06,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:05:06,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:06,218 INFO L87 Difference]: Start difference. First operand 2496 states and 3936 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:06,295 INFO L93 Difference]: Finished difference Result 3902 states and 6036 transitions. [2022-07-12 09:05:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:05:06,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-12 09:05:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:06,304 INFO L225 Difference]: With dead ends: 3902 [2022-07-12 09:05:06,304 INFO L226 Difference]: Without dead ends: 2940 [2022-07-12 09:05:06,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:05:06,308 INFO L413 NwaCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:06,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2022-07-12 09:05:06,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2022-07-12 09:05:06,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5565395095367847) internal successors, (4570), 2937 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4570 transitions. [2022-07-12 09:05:06,398 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4570 transitions. Word has length 54 [2022-07-12 09:05:06,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:06,398 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 4570 transitions. [2022-07-12 09:05:06,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:06,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4570 transitions. [2022-07-12 09:05:06,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 09:05:06,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:06,399 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] [2022-07-12 09:05:06,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 09:05:06,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:06,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:06,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2022-07-12 09:05:06,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:06,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012423768] [2022-07-12 09:05:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:06,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:06,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:06,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012423768] [2022-07-12 09:05:06,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012423768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:06,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:06,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:05:06,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321640802] [2022-07-12 09:05:06,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:06,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:05:06,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:05:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:05:06,528 INFO L87 Difference]: Start difference. First operand 2938 states and 4570 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:06,706 INFO L93 Difference]: Finished difference Result 4342 states and 6644 transitions. [2022-07-12 09:05:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:05:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-12 09:05:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:06,715 INFO L225 Difference]: With dead ends: 4342 [2022-07-12 09:05:06,715 INFO L226 Difference]: Without dead ends: 2940 [2022-07-12 09:05:06,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:05:06,718 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 3072 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:06,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3072 Valid, 1726 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2022-07-12 09:05:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2022-07-12 09:05:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5483651226158037) internal successors, (4546), 2937 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4546 transitions. [2022-07-12 09:05:06,810 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4546 transitions. Word has length 54 [2022-07-12 09:05:06,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:06,810 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 4546 transitions. [2022-07-12 09:05:06,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4546 transitions. [2022-07-12 09:05:06,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 09:05:06,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:06,811 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] [2022-07-12 09:05:06,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 09:05:06,812 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:06,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2022-07-12 09:05:06,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:06,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660288475] [2022-07-12 09:05:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:06,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:06,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:06,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660288475] [2022-07-12 09:05:06,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660288475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:06,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:06,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:05:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154526144] [2022-07-12 09:05:06,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:06,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:05:06,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:06,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:05:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:05:06,899 INFO L87 Difference]: Start difference. First operand 2938 states and 4546 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:07,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:07,120 INFO L93 Difference]: Finished difference Result 4340 states and 6595 transitions. [2022-07-12 09:05:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:05:07,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-12 09:05:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:07,148 INFO L225 Difference]: With dead ends: 4340 [2022-07-12 09:05:07,148 INFO L226 Difference]: Without dead ends: 2938 [2022-07-12 09:05:07,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:05:07,151 INFO L413 NwaCegarLoop]: 1503 mSDtfsCounter, 4543 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4543 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:07,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4543 Valid, 2992 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 09:05:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2022-07-12 09:05:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2022-07-12 09:05:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5401907356948228) internal successors, (4522), 2937 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4522 transitions. [2022-07-12 09:05:07,316 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4522 transitions. Word has length 55 [2022-07-12 09:05:07,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:07,317 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 4522 transitions. [2022-07-12 09:05:07,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4522 transitions. [2022-07-12 09:05:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 09:05:07,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:07,318 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] [2022-07-12 09:05:07,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 09:05:07,318 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:07,319 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2022-07-12 09:05:07,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:07,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616941521] [2022-07-12 09:05:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:07,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:07,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:07,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616941521] [2022-07-12 09:05:07,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616941521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:07,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:07,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:05:07,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128369583] [2022-07-12 09:05:07,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:07,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:05:07,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:07,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:05:07,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:05:07,362 INFO L87 Difference]: Start difference. First operand 2938 states and 4522 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:07,563 INFO L93 Difference]: Finished difference Result 4340 states and 6547 transitions. [2022-07-12 09:05:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:05:07,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-12 09:05:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:07,576 INFO L225 Difference]: With dead ends: 4340 [2022-07-12 09:05:07,577 INFO L226 Difference]: Without dead ends: 2938 [2022-07-12 09:05:07,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:05:07,580 INFO L413 NwaCegarLoop]: 1505 mSDtfsCounter, 4576 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4576 SdHoareTripleChecker+Valid, 2993 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:07,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4576 Valid, 2993 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2022-07-12 09:05:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2022-07-12 09:05:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5320163487738419) internal successors, (4498), 2937 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4498 transitions. [2022-07-12 09:05:07,741 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4498 transitions. Word has length 55 [2022-07-12 09:05:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:07,741 INFO L495 AbstractCegarLoop]: Abstraction has 2938 states and 4498 transitions. [2022-07-12 09:05:07,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4498 transitions. [2022-07-12 09:05:07,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 09:05:07,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:07,744 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] [2022-07-12 09:05:07,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 09:05:07,745 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:07,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:07,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2022-07-12 09:05:07,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:07,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033317402] [2022-07-12 09:05:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:07,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:07,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:07,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033317402] [2022-07-12 09:05:07,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033317402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:07,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:07,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:05:07,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927227127] [2022-07-12 09:05:07,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:07,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 09:05:07,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:07,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 09:05:07,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:05:07,793 INFO L87 Difference]: Start difference. First operand 2938 states and 4498 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:08,063 INFO L93 Difference]: Finished difference Result 4169 states and 6196 transitions. [2022-07-12 09:05:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 09:05:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-12 09:05:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:08,071 INFO L225 Difference]: With dead ends: 4169 [2022-07-12 09:05:08,071 INFO L226 Difference]: Without dead ends: 4167 [2022-07-12 09:05:08,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:05:08,073 INFO L413 NwaCegarLoop]: 1555 mSDtfsCounter, 172 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6153 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:08,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 6153 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2022-07-12 09:05:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2022-07-12 09:05:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3032 states have (on average 1.512532981530343) internal successors, (4586), 3033 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4586 transitions. [2022-07-12 09:05:08,217 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4586 transitions. Word has length 55 [2022-07-12 09:05:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:08,217 INFO L495 AbstractCegarLoop]: Abstraction has 3034 states and 4586 transitions. [2022-07-12 09:05:08,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4586 transitions. [2022-07-12 09:05:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:05:08,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:08,221 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:05:08,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 09:05:08,222 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:08,222 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2022-07-12 09:05:08,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:08,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632663790] [2022-07-12 09:05:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:08,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 09:05:08,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:08,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632663790] [2022-07-12 09:05:08,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632663790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:08,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:08,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:05:08,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040990036] [2022-07-12 09:05:08,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:08,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:05:08,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:08,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:05:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:05:08,292 INFO L87 Difference]: Start difference. First operand 3034 states and 4586 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:08,751 INFO L93 Difference]: Finished difference Result 9340 states and 13355 transitions. [2022-07-12 09:05:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:05:08,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-12 09:05:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:08,765 INFO L225 Difference]: With dead ends: 9340 [2022-07-12 09:05:08,765 INFO L226 Difference]: Without dead ends: 7842 [2022-07-12 09:05:08,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:05:08,770 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 4751 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4751 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:08,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4751 Valid, 3330 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2022-07-12 09:05:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2022-07-12 09:05:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4528 states have (on average 1.4686395759717314) internal successors, (6650), 4529 states have internal predecessors, (6650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6650 transitions. [2022-07-12 09:05:09,061 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6650 transitions. Word has length 79 [2022-07-12 09:05:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:09,061 INFO L495 AbstractCegarLoop]: Abstraction has 4530 states and 6650 transitions. [2022-07-12 09:05:09,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6650 transitions. [2022-07-12 09:05:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:05:09,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:09,063 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:05:09,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 09:05:09,063 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:09,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2022-07-12 09:05:09,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:09,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640476625] [2022-07-12 09:05:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:09,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 09:05:09,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:09,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640476625] [2022-07-12 09:05:09,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640476625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:09,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:09,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:05:09,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407185673] [2022-07-12 09:05:09,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:09,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:05:09,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:09,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:05:09,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:05:09,115 INFO L87 Difference]: Start difference. First operand 4530 states and 6650 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:09,661 INFO L93 Difference]: Finished difference Result 10836 states and 15419 transitions. [2022-07-12 09:05:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:05:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-12 09:05:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:09,674 INFO L225 Difference]: With dead ends: 10836 [2022-07-12 09:05:09,675 INFO L226 Difference]: Without dead ends: 9338 [2022-07-12 09:05:09,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:05:09,680 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 4708 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4708 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:09,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4708 Valid, 3366 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:09,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2022-07-12 09:05:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2022-07-12 09:05:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 6776 states have (on average 1.4353600944510034) internal successors, (9726), 6777 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9726 transitions. [2022-07-12 09:05:10,143 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9726 transitions. Word has length 79 [2022-07-12 09:05:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:10,144 INFO L495 AbstractCegarLoop]: Abstraction has 6778 states and 9726 transitions. [2022-07-12 09:05:10,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9726 transitions. [2022-07-12 09:05:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:05:10,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:10,147 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:05:10,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 09:05:10,147 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:10,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:10,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2022-07-12 09:05:10,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:10,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519345122] [2022-07-12 09:05:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:10,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 09:05:10,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:10,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519345122] [2022-07-12 09:05:10,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519345122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:10,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:10,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:05:10,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967302253] [2022-07-12 09:05:10,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:10,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:05:10,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:10,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:05:10,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:05:10,208 INFO L87 Difference]: Start difference. First operand 6778 states and 9726 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:11,172 INFO L93 Difference]: Finished difference Result 12332 states and 17483 transitions. [2022-07-12 09:05:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:05:11,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-12 09:05:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:11,190 INFO L225 Difference]: With dead ends: 12332 [2022-07-12 09:05:11,190 INFO L226 Difference]: Without dead ends: 10834 [2022-07-12 09:05:11,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:05:11,195 INFO L413 NwaCegarLoop]: 1593 mSDtfsCounter, 4740 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4740 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:11,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4740 Valid, 3382 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2022-07-12 09:05:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2022-07-12 09:05:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8272 states have (on average 1.4252901353965184) internal successors, (11790), 8273 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11790 transitions. [2022-07-12 09:05:11,824 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11790 transitions. Word has length 79 [2022-07-12 09:05:11,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:11,824 INFO L495 AbstractCegarLoop]: Abstraction has 8274 states and 11790 transitions. [2022-07-12 09:05:11,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11790 transitions. [2022-07-12 09:05:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:05:11,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:11,827 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:05:11,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 09:05:11,827 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:11,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2022-07-12 09:05:11,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:11,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635932332] [2022-07-12 09:05:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:11,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:05:11,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:11,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635932332] [2022-07-12 09:05:11,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635932332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:05:11,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:05:11,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:05:11,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017075783] [2022-07-12 09:05:11,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:05:11,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:05:11,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:11,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:05:11,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:05:11,867 INFO L87 Difference]: Start difference. First operand 8274 states and 11790 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:12,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:12,666 INFO L93 Difference]: Finished difference Result 12948 states and 18347 transitions. [2022-07-12 09:05:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:05:12,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-12 09:05:12,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:12,685 INFO L225 Difference]: With dead ends: 12948 [2022-07-12 09:05:12,685 INFO L226 Difference]: Without dead ends: 11890 [2022-07-12 09:05:12,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:05:12,690 INFO L413 NwaCegarLoop]: 1590 mSDtfsCounter, 4737 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4737 SdHoareTripleChecker+Valid, 3346 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:12,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4737 Valid, 3346 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2022-07-12 09:05:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2022-07-12 09:05:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9330 states, 9328 states have (on average 1.4217409948542024) internal successors, (13262), 9329 states have internal predecessors, (13262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13262 transitions. [2022-07-12 09:05:13,522 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13262 transitions. Word has length 79 [2022-07-12 09:05:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:13,522 INFO L495 AbstractCegarLoop]: Abstraction has 9330 states and 13262 transitions. [2022-07-12 09:05:13,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:13,523 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13262 transitions. [2022-07-12 09:05:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 09:05:13,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:13,525 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-07-12 09:05:13,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 09:05:13,525 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:13,526 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2022-07-12 09:05:13,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:13,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165292125] [2022-07-12 09:05:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:13,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:05:13,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:13,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165292125] [2022-07-12 09:05:13,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165292125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:05:13,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583530379] [2022-07-12 09:05:13,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:13,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:05:13,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:05:13,596 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) [2022-07-12 09:05:13,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 09:05:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:13,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 09:05:13,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:05:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:05:13,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:05:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:05:14,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583530379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:05:14,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:05:14,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-07-12 09:05:14,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835453738] [2022-07-12 09:05:14,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:05:14,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 09:05:14,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:14,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 09:05:14,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-12 09:05:14,136 INFO L87 Difference]: Start difference. First operand 9330 states and 13262 transitions. Second operand has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:15,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:05:15,908 INFO L93 Difference]: Finished difference Result 29951 states and 42120 transitions. [2022-07-12 09:05:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 09:05:15,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-12 09:05:15,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:05:15,948 INFO L225 Difference]: With dead ends: 29951 [2022-07-12 09:05:15,948 INFO L226 Difference]: Without dead ends: 24141 [2022-07-12 09:05:15,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-07-12 09:05:15,959 INFO L413 NwaCegarLoop]: 1602 mSDtfsCounter, 3299 mSDsluCounter, 4877 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3299 SdHoareTripleChecker+Valid, 6479 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:05:15,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3299 Valid, 6479 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:05:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24141 states. [2022-07-12 09:05:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24141 to 23970. [2022-07-12 09:05:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23970 states, 23968 states have (on average 1.376919225634179) internal successors, (33002), 23969 states have internal predecessors, (33002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23970 states to 23970 states and 33002 transitions. [2022-07-12 09:05:17,604 INFO L78 Accepts]: Start accepts. Automaton has 23970 states and 33002 transitions. Word has length 80 [2022-07-12 09:05:17,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:05:17,604 INFO L495 AbstractCegarLoop]: Abstraction has 23970 states and 33002 transitions. [2022-07-12 09:05:17,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:05:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 23970 states and 33002 transitions. [2022-07-12 09:05:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 09:05:17,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:05:17,606 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-07-12 09:05:17,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 09:05:17,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 09:05:17,819 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:05:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:05:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1057956914, now seen corresponding path program 1 times [2022-07-12 09:05:17,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:05:17,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26886344] [2022-07-12 09:05:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:17,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:05:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:17,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:05:17,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26886344] [2022-07-12 09:05:17,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26886344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:05:17,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190782377] [2022-07-12 09:05:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:05:17,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:05:17,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:05:17,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:05:17,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 09:05:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:05:18,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 09:05:18,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:05:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:18,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:05:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:05:18,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190782377] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:05:18,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:05:18,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2022-07-12 09:05:18,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195435119] [2022-07-12 09:05:18,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:05:18,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 09:05:18,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:05:18,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 09:05:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-07-12 09:05:18,960 INFO L87 Difference]: Start difference. First operand 23970 states and 33002 transitions. Second operand has 30 states, 30 states have (on average 6.966666666666667) internal successors, (209), 29 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)